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From sboi...@apache.org
Subject [12/35] ignite git commit: Updated github docs for .NET and C++
Date Fri, 22 Sep 2017 11:21:51 GMT
Updated github docs for .NET and C++


Project: http://git-wip-us.apache.org/repos/asf/ignite/repo
Commit: http://git-wip-us.apache.org/repos/asf/ignite/commit/8cc6a596
Tree: http://git-wip-us.apache.org/repos/asf/ignite/tree/8cc6a596
Diff: http://git-wip-us.apache.org/repos/asf/ignite/diff/8cc6a596

Branch: refs/heads/ignite-3479
Commit: 8cc6a5964d784289224edd77243fc1f232b200a3
Parents: 271b32f
Author: Prachi Garg <pgarg@gridgain.com>
Authored: Thu Sep 21 13:09:35 2017 -0700
Committer: Denis Magda <dmagda@gridgain.com>
Committed: Thu Sep 21 13:09:35 2017 -0700

----------------------------------------------------------------------
 README.md                          | 147 ++++++++++----------
 modules/platforms/cpp/README.md    | 215 ++++++++++++++++++++++++++++++
 modules/platforms/dotnet/README.md | 229 +++++++++++++++++++++++---------
 3 files changed, 462 insertions(+), 129 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/ignite/blob/8cc6a596/README.md
----------------------------------------------------------------------
diff --git a/README.md b/README.md
index b4a976d..2306d16 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,19 @@
 
 <a href="http://ci.ignite.apache.org/viewType.html?buildTypeId=IgniteTests_IgniteBasic&branch_IgniteTests=%3Cdefault%3E"><img src="http://ci.ignite.apache.org/app/rest/builds/buildType:(id:IgniteTests_IgniteBasic)/statusIcon" /></a>
 
-[Apache Ignite][apache-homepage] is the <b>in-memory</b> computing platform
+
+## Getting Started
+
+For information on how to get started with Apache Ignite, please visit: [Getting Started][getting-started].
+
+## Full Documentation
+
+You can find the full Apache Ignite documentation here: [Full documentation][docs].
+
+
+## What is Apache Ignite?
+
+[Apache Ignite][apache-ignite-homepage] is the <b>in-memory</b> computing platform
 that is <b>durable</b>, <b>strongly consistent</b>, and <b>highly available</b>
 with powerful <b>SQL</b>, <b>key-value</b> and <b>processing</b> APIs.
 
@@ -66,20 +78,20 @@ You can view Apache Ignite as a collection of independent, well-integrated compo
  scalability of your application.
 
 Some of these components include:
-*	Advanced Clustering
-*	Data Grid
-*	SQL Database
-*	Compute Grid
-*	Service Grid
-*	Hadoop Accelerator
-*	Spark Shared RDDs and SQL indexes
+* [Advanced Clustering](#advanced-clustering)
+* [Data Grid](#data-grid-jcache)
+* [SQL Database](#sql-database)
+* [Compute Grid](#compute-grid)
+* [Service Grid](#service-grid)
+* [Hadoop Accelerator](#hadoop-accelerator)
+* [Spark Shared RDDs and SQL indexes](#spark-shared-rdds)
 
-Below you’ll find a brief coverage for each some of them.
+Below you’ll find a brief explanation for each of them.
 
 
 ### Advanced Clustering
 
-Ignite nodes can automatically discover each other. This helps to scale the cluster when needed, without having to restart the whole cluster. Developers can also leverage from Ignite’s hybrid cloud support that allows establishing connection between private cloud and public clouds such as Amazon Web Services, providing them with best of both worlds.
+Ignite nodes can [automatically discover](https://apacheignite.readme.io/docs/cluster) each other. This helps to scale the cluster when needed, without having to restart the whole cluster. Developers can also leverage from Ignite’s hybrid cloud support that allows establishing connection between private cloud and public clouds such as Amazon Web Services, providing them with best of both worlds.
 
 <p align="center">
     <a href="https://apacheignite.readme.io/docs/cluster">
@@ -88,16 +100,17 @@ Ignite nodes can automatically discover each other. This helps to scale the clus
 </p>
 
 Apache Ignite can be deployed on:
-* AWS
-* Docker
-* Google Cloud
-* Kubernetes
-* Mesos
-* YARN
+* [AWS](https://apacheignite.readme.io/docs/aws-deployment)
+* [Docker](https://apacheignite.readme.io/docs/docker-deployment)
+* [Google Compute](https://apacheignite.readme.io/docs/google-compute-deployment)
+* [Kubernetes](https://apacheignite.readme.io/docs/kubernetes-deployment)
+* [Mesos](https://apacheignite.readme.io/docs/mesos-deployment)
+* [YARN](https://apacheignite.readme.io/docs/yarn-deployment)
+
 
 ### Data Grid (JCache)
 
-Ignite data grid is an in-memory distributed key-value store which can be viewed as a distributed partitioned hash map,
+[Ignite data grid](https://apacheignite.readme.io/docs/data-grid) is an in-memory distributed key-value store which can be viewed as a distributed partitioned hash map,
 with every cluster node owning a portion of the overall data. This way the more cluster nodes we add, the more data we
 can cache.
 
@@ -110,13 +123,13 @@ data sets using standard SQL syntax. Ignite supports standard SQL for querying i
 
 <p align="center">
     <a href="https://apacheignite.readme.io/docs/data-grid">
-        <img src="https://ignite.apache.org/images/in-memory-data-grid.jpg" />
+        <img src="https://ignite.apache.org/images/data_grid.png" vspace="15" width="450px"/>
     </a>
 </p>
 
 ### SQL Database
 
-Apache Ignite incorporates distributed SQL database capabilities as a part of its platform. The database is horizontally
+Apache Ignite incorporates [distributed SQL database](https://apacheignite.readme.io/docs/distributed-sql) capabilities as a part of its platform. The database is horizontally
  scalable, fault tolerant and SQL ANSI-99 compliant. It supports all SQL, DDL, and DML commands including SELECT, UPDATE,
   INSERT, MERGE, and DELETE queries. It also provides support for a subset of DDL commands relevant for distributed
   databases.
@@ -130,40 +143,40 @@ the Ignite JDBC or ODBC drivers. This provides a true cross-platform connectivit
 
 <p align="center">
     <a href="https://apacheignite.readme.io/docs/distributed-sql">
-        <img src="https://ignite.apache.org/images/ignite-distributed-database.png" vspace="15" width="400px"/>
+        <img src="https://ignite.apache.org/images/sql_database.png" vspace="15" width="400px"/>
     </a>
 </p>
 
 
 ### Compute Grid
 
-Distributed computations are performed in parallel fashion to gain high performance, low latency, and linear scalability.
+[Distributed computations](https://apacheignite.readme.io/docs/compute-grid) are performed in parallel fashion to gain high performance, low latency, and linear scalability.
  Ignite compute grid provides a set of simple APIs that allow users distribute computations and data processing across
  multiple computers in the cluster. Distributed parallel processing is based on the ability to take any computation and
  execute it on any set of cluster nodes and return the results back.
 
 <p align="center">
     <a href="https://apacheignite.readme.io/docs/compute-grid">
-        <img src="https://ignite.apache.org/images/in_memory_compute.png" vspace="15"/>
+        <img src="https://ignite.apache.org/images/collocated_processing.png" vspace="15" width="400px"/>
     </a>
 </p>
 
 We support these features, amongst others:
 
-* Distributed Closure Execution
-* MapReduce & ForkJoin Processing
-* Continuous Mapping
-* Clustered Executor Service
-* Per-Node Shared State
-* Collocation of Compute and Data
-* Load Balancing
-* Fault Tolerance
-* Job State Checkpointing
-* Job Scheduling
+* [Distributed Closure Execution](https://apacheignite.readme.io/docs/distributed-closures)
+* [MapReduce & ForkJoin Processing](https://apacheignite.readme.io/docs/compute-tasks)
+* [Continuous Mapping](https://apacheignite.readme.io/docs/continuous-mapping)
+* [Clustered Executor Service](https://apacheignite.readme.io/docs/executor-service)
+* [Per-Node Shared State](https://apacheignite.readme.io/docs/node-local-map)
+* [Collocation of Compute and Data](https://apacheignite.readme.io/docs/collocate-compute-and-data)
+* [Load Balancing](https://apacheignite.readme.io/docs/load-balancing)
+* [Fault Tolerance](https://apacheignite.readme.io/docs/fault-tolerance)
+* [Job State Checkpointing](https://apacheignite.readme.io/docs/checkpointing)
+* [Job Scheduling](https://apacheignite.readme.io/docs/job-scheduling)
 
 ### Service Grid
 
-Service Grid allows for deployments of arbitrary user-defined services on the cluster. You can implement and deploy any
+[Service Grid](https://apacheignite.readme.io/docs/service-grid) allows for deployments of arbitrary user-defined services on the cluster. You can implement and deploy any
 service, such as custom counters, ID generators, hierarchical maps, etc.
 
 Ignite allows you to control how many instances of your service should be deployed on each cluster node and will
@@ -171,13 +184,13 @@ automatically ensure proper deployment and fault tolerance of all the services.
 
 <p align="center">
     <a href="https://apacheignite.readme.io/docs/service-grid">
-        <img src="https://ignite.apache.org/images/ignite_service.png" vspace="15"/>
+        <img src="https://ignite.apache.org/images/service_grid.png" vspace="15" width="400px"/>
     </a>
 </p>
 
 ### Ignite File System
 
-Ignite File System (IGFS) is an in-memory file system allowing work with files and directories over existing cache
+[Ignite File System](https://apacheignite-fs.readme.io/docs/in-memory-file-system) (IGFS) is an in-memory file system allowing work with files and directories over existing cache
 infrastructure. IGFS can either work as purely in-memory file system, or delegate to another file system (e.g. various
 Hadoop file system implementations) acting as a caching layer.
 
@@ -185,16 +198,17 @@ In addition, IGFS provides API to execute map-reduce tasks over file system data
 
 ### Distributed Data Structures
 
-Ignite supports complex data structures in a distributed fashion:
+Ignite supports complex [data structures](https://apacheignite.readme.io/docs/data-structures) in a distributed fashion:
 
-* Queues and sets: ordinary, bounded, collocated, non-collocated
-* Atomic types: `AtomicLong` and `AtomicReference`
-* `CountDownLatch`
-* ID Generators
+* [Queues and sets](https://apacheignite.readme.io/docs/queue-and-set): ordinary, bounded, collocated, non-collocated
+* [Atomic types](https://apacheignite.readme.io/docs/atomic-types): `AtomicLong` and `AtomicReference`
+* [CountDownLatch](https://apacheignite.readme.io/docs/countdownlatch)
+* [ID Generators](https://apacheignite.readme.io/docs/id-generator)
+* [Semaphore](https://apacheignite.readme.io/docs/distributed-semaphore)
 
 ### Distributed Messaging
 
-Distributed messaging allows for topic based cluster-wide communication between all nodes. Messages with a specified
+[Distributed messaging](https://apacheignite.readme.io/docs/messaging) allows for topic based cluster-wide communication between all nodes. Messages with a specified
 message topic can be distributed to all or sub-group of nodes that have subscribed to that topic.
 
 Ignite messaging is based on publish-subscribe paradigm where publishers and subscribers are connected together by a
@@ -202,15 +216,15 @@ common topic. When one of the nodes sends a message A for topic T, it is publish
 
 ### Distributed Events
 
-Distributed events allow applications to receive notifications when a variety of events occur in the distributed grid environment. You can automatically get notified for task executions, read, write or query operations occurring on local or remote nodes within the cluster.
+[Distributed events](https://apacheignite.readme.io/docs/events) allow applications to receive notifications when a variety of events occur in the distributed grid environment. You can automatically get notified for task executions, read, write or query operations occurring on local or remote nodes within the cluster.
 
 ### Hadoop Accelerator
 
-Our Hadoop Accelerator provides a set of components allowing for in-memory Hadoop job execution and file system operations.
+Our [Hadoop Accelerator](https://apacheignite-fs.readme.io/docs/hadoop-accelerator) provides a set of components allowing for in-memory Hadoop job execution and file system operations.
 
 #### MapReduce
 
-An alternate high-performant implementation of job tracker which replaces standard Hadoop MapReduce. Use it to
+An alternate [high-performant](https://apacheignite-fs.readme.io/docs/map-reduce) implementation of job tracker which replaces standard Hadoop MapReduce. Use it to
 boost your Hadoop MapReduce job execution performance.
 
 <p align="center">
@@ -221,7 +235,7 @@ boost your Hadoop MapReduce job execution performance.
 
 #### IGFS - In-Memory File System
 
-A Hadoop-compliant IGFS File System implementation over which Hadoop can run over in plug-n-play fashion and significantly reduce I/O and improve both, latency and throughput.
+A Hadoop-compliant [IGFS](https://apacheignite-fs.readme.io/docs/file-system) File System implementation over which Hadoop can run over in plug-n-play fashion and significantly reduce I/O and improve both, latency and throughput.
 
 <p align="center">
     <a href="https://apacheignite-fs.readme.io/docs/in-memory-file-system">
@@ -231,74 +245,76 @@ A Hadoop-compliant IGFS File System implementation over which Hadoop can run ove
 
 #### Secondary File System
 
-An implementation of `SecondaryFileSystem`. This implementation can be injected into existing IGFS allowing for
+An implementation of [`SecondaryFileSystem`](https://apacheignite-fs.readme.io/docs/secondary-file-system). This implementation can be injected into existing IGFS allowing for
 read-through and write-through behavior over any other Hadoop FileSystem implementation (e.g. HDFS). Use it if you
 want your IGFS to become an in-memory caching layer over disk-based HDFS or any other Hadoop-compliant file system.
 
 #### Supported Hadoop distributions
 
-* Apache Hadoop
-* Cloudera CDH
-* Hortonworks HDP
-* Apache BigTop
+* [Apache Hadoop](https://apacheignite-fs.readme.io/docs/installing-on-apache-hadoop)
+* [Cloudera CDH](https://apacheignite-fs.readme.io/docs/installing-on-cloudera-cdh)
+* [Hortonworks HDP](https://apacheignite-fs.readme.io/docs/installing-on-hortonworks-hdp)
+* [Apache Hive](https://apacheignite-fs.readme.io/docs/running-apache-hive-over-ignited-hadoop)
 
 ### Spark Shared RDDs
 
-Apache Ignite provides an implementation of Spark RDD abstraction which allows to easily share state in memory across Spark jobs. The main difference between native Spark `RDD` and `IgniteRDD` is that Ignite RDD provides a shared in-memory view on data across different Spark jobs, workers, or applications, while native Spark RDD cannot be seen by other Spark jobs or applications.
+Apache Ignite provides an implementation of Spark RDD abstraction which allows to easily share state in memory across Spark jobs.
+
+The main difference between native Spark `RDD` and `IgniteRDD` is that Ignite RDD provides a [shared in-memory](https://apacheignite-fs.readme.io/docs/ignite-for-spark) view on data across different Spark jobs, workers, or applications, while native Spark RDD cannot be seen by other Spark jobs or applications.
 
 <p align="center">
     <a href="https://apacheignite-fs.readme.io/docs/ignite-for-spark">
-        <img src="https://ignite.apache.org/images/spark-ignite-rdd.png" height="400" vspace="15" />
+        <img src="https://ignite.apache.org/images/spark_integration.png" height="400" vspace="15" />
     </a>
 </p>
 
 ## Ignite Facts
 
-<b>Is Ignite a persistent or pure in-memory storage?</b><br/>
+#### Is Ignite a persistent or pure in-memory storage?
 **Both**. Native persistence in Ignite can be turned on and off. This allows Ignite to store data sets bigger than can fit in the available memory. Essentially, the smaller operational data sets can be stored in-memory only, and larger data sets that do not fit in memory can be stored on disk, using memory as a caching layer for better performance.
 
 [Read More](https://apacheignite.readme.io/docs/distributed-persistent-store)
 
-<b>Is Ignite a distributed database?</b><br/>
+#### Is Ignite a distributed database?
 **Yes**. Data in Ignite is either *partitioned* or *replicated* across a cluster of multiple nodes. This provides scalability and adds resilience to the system. Ignite automatically controls how data is partitioned, however, users can plug in their own distribution (affinity) functions and collocate various pieces of data together for efficiency.
 
 [Read More](https://apacheignite.readme.io/docs/distributed-sql)
 
-<b>Is Ignite a relational SQL database?</b><br/>
+#### Is Ignite a relational SQL database?
 **Not fully**. Although Ignite aims to behave like any other relational SQL database, there are differences in how Ignite handles constraints and indexes. Ignite supports *primary* and *secondary* indexes, however, the *uniqueness* can only be enforced for the *primary* indexes. Ignite also does not support *foreign key* constraints.
 
 Essentially, Ignite purposely does not support any constraints that would entail a cluster broadcast message for each update and significantly hurt performance and scalability of the system.
 
 [Read More](https://apacheignite.readme.io/docs/indexes)
 
-<b>Is Ignite an in-memory database?</b><br/>
+#### Is Ignite an in-memory database?
 **Yes**. Even though Ignite *durable memory* works well in-memory and on-disk, the disk persistence can be disabled and Ignite can act as a pure *in-memory database*.
 
 [Read More](https://apacheignite.readme.io/docs/distributed-sql)
 
-<b>Is Ignite a transactional database?</b><br/>
+#### Is Ignite a transactional database?
 **Not fully**. ACID Transactions are supported, but only at *key-value* API level. Ignite also supports *cross-partition* transactions, which means that transactions can span keys residing in different partitions on different servers.
 
 At *SQL* level Ignite supports *atomic*, but not yet *transactional* consistency. Ignite community plans to implement SQL transactions in version 2.2.
 
 [Read More](https://apacheignite.readme.io/docs/sql-queries#known-limitations)
 
-<b>Is Ignite a key-value store?</b><br/>
+#### Is Ignite a key-value store?
 **Yes**. Ignite provides a feature rich key-value API, that is JCache (JSR-107) compliant and supports Java, C++, and .NET.
 
 [Read More](https://apacheignite.readme.io/docs/data-grid)
 
-<b>Is Ignite an in-memory data grid?</b><br/>
+#### Is Ignite an in-memory data grid?
 **Yes**. Ignite is a full-featured data grid, which can be used either in pure in-memory mode or with Ignite native persistence. It can also integrate with any 3rd party database, including any RDBMS or NoSQL store.
 
 [Read More](https://apacheignite.readme.io/docs/data-grid)
 
-<b>What is durable memory?</b><br/>
+#### What is durable memory?
 Ignite *durable memory* architecture allows Ignite to extend in-memory computing to disk. It is based on a paged-based off-heap memory allocator which becomes durable by persisting to the *write-ahead-log (WAL)* and, then, to main Ignite persistent storage. When persistence is disabled, durable memory acts like a pure in-memory storage.
 
 [Read More](https://apacheignite.readme.io/docs/durable-memory)
 
-<b>What is collocated processing?</b><br/>
+#### What is collocated processing?
 Ignite is a distributed system and, therefore, it is important to be able to collocate data with data and compute with data to avoid distributed data noise. Data collocation becomes especially important when performing distributed SQL joins. Ignite also supports sending user logic (functions, lambdas, etc.) directly to the nodes where the data resides and computing on the data locally.
 
 [Read More](https://apacheignite.readme.io/docs/collocate-compute-and-data)
@@ -309,14 +325,7 @@ Ignite is a distributed system and, therefore, it is important to be able to col
 
 <a href="modules/platforms/cpp">Ignite C++</a>
 
-## Getting Started
-
-For information on how to get started with Apache Ignite please visit: [Getting Started][getting-started].
-
-## Full Documentation
-
-You can find the full Apache Ignite documentation here: [Full documentation][docs].
 
-[apache-homepage]: https://ignite.apache.org/
+[apache-ignite-homepage]: https://ignite.apache.org/
 [getting-started]: https://apacheignite.readme.io/docs/getting-started
 [docs]: https://apacheignite.readme.io/docs
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/ignite/blob/8cc6a596/modules/platforms/cpp/README.md
----------------------------------------------------------------------
diff --git a/modules/platforms/cpp/README.md b/modules/platforms/cpp/README.md
new file mode 100644
index 0000000..8b89004
--- /dev/null
+++ b/modules/platforms/cpp/README.md
@@ -0,0 +1,215 @@
+# Apache Ignite C++ In-Memory Computing Platform
+
+<a href="https://ignite.apache.org/"><img src="https://ignite.apache.org/images/logo3.png" hspace="20"/></a>
+
+[![Join the chat at https://gitter.im/apacheignite/ignite](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/apacheignite/ignite?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+
+## Getting Started
+
+For information on how to get started with Apache Ignite, please visit: [Getting Started][getting-started].
+
+## Full Documentation
+
+You can find the full Apache Ignite documentation here: [Full documentation][docs].
+
+## What is Apache Ignite?
+
+[Apache Ignite][apache-ignite-homepage] is the <b>in-memory</b> computing platform
+that is <b>durable</b>, <b>strongly consistent</b>, and <b>highly available</b>
+with powerful <b>SQL</b>, <b>key-value</b> and <b>processing</b> APIs.
+
+<p align="center">
+    <a href="https://apacheignite-cpp.readme.io/docs/">
+        <img src="https://ignite.apache.org/images/durable-memory.png" width="900px"/>
+    </a>
+</p>
+
+## Durable Memory
+Ignite's durable memory component treats RAM not just as a caching layer but as a complete fully functional storage layer. This means that users can turn the persistence on and off as needed. If the persistence is off, then Ignite can act as a distributed **in-memory database** or **in-memory data grid**, depending on whether you prefer to use SQL or key-value APIs. If the persistence is turned on, then Ignite becomes a distributed, **horizontally scalable database** that guarantees full data consistency and is resilient to full cluster failures.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/durable-memory)
+
+## Ignite Persistence
+
+Ignite Native Persistence is a distributed, ACID, and SQL-compliant **disk store** that transparently integrates with Ignite's Durable Memory as an optional disk layer storing data and indexes on SSD, Flash, 3D XPoint, and other types of non-volatile storages.
+
+With the Ignite Persistence enabled, you no longer need to keep all the data and indexes in memory or warm it up after a node or cluster restart because the Durable Memory is tightly coupled with persistence and treats it as a secondary memory tier. This implies that if a subset of data or an index is missing in RAM, the Durable Memory will take it from the disk.
+
+<p align="center">
+    <a href="https://apacheignite.readme.io/docs/distributed-persistent-store">
+        <img src="https://ignite.apache.org/images/native_persistence.png" width="400px"/>
+    </a>
+</p>
+
+[Read More](https://apacheignite-cpp.readme.io/docs/ignite-persistence)
+
+## ACID Compliance
+Data stored in Ignite is ACID-compliant both in memory and on disk, making Ignite a **strongly consistent** system. Ignite transactions work across the network and can span multiple servers.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/transactions)
+
+## Complete SQL Support
+Ignite provides full support for SQL, DDL and DML, allowing users to interact with Ignite using pure SQL without writing any code. This means that users can create tables and indexes as well as insert, update, and query data using only SQL. Having such complete SQL support makes Ignite a one-of-a-kind **distributed SQL database**.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/sql-database)
+
+## Key-Value
+The in-memory data grid component in Ignite is a fully transactional **distributed key-value store** that can scale horizontally across 100s of servers in the cluster. When persistence is enabled, Ignite can also store more data than fits in memory and survive full cluster restarts.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/data-grid)
+
+## Collocated Processing
+Most traditional databases work in a client-server fashion, meaning that data must be brought to the client side for processing. This approach requires lots of data movement from servers to clients and generally does not scale. Ignite, on the other hand, allows for sending light-weight computations to the data, i.e. **collocating** computations with data. As a result, Ignite scales better and minimizes data movement.
+
+[Read More](https://apacheignite.readme.io/docs/collocate-compute-and-data)
+
+## Scalability and Durability
+Ignite is an elastic, horizontally scalable distributed system that supports adding and removing cluster nodes on demand. Ignite also allows for storing multiple copies of the data, making it resilient to partial cluster failures. If the persistence is enabled, then data stored in Ignite will also survive full cluster failures. Cluster restarts in Ignite can be very fast, as the data becomes operational instantaneously directly from disk. As a result, the data does not need to be preloaded in-memory to begin processing, and Ignite caches will lazily warm up resuming the in memory performance.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/cluster)
+
+## Ignite and Ignite С++
+* Ignite C++ is built on top of Ignite.
+* Ignite С++ starts the JVM in the same process and communicates with it via JNI.
+* .NET, C++ and Java nodes can join the same cluster, use the same caches, and interoperate using common binary protocol.
+* Java compute jobs can execute on any node (Java, .NET, C++).
+
+## Ignite Components
+
+You can view Apache Ignite as a collection of independent, well-integrated components geared to improve performance and
+ scalability of your application.
+
+Some of these components include:
+* [Advanced Clustering](#advanced-clustering)
+* [Data Grid](#data-grid-jcache)
+* [SQL Database](#sql-database)
+* [Compute Grid](#compute-grid)
+
+Below you’ll find a brief explanation for each of them:
+
+## Advanced Clustering
+
+Ignite nodes can [automatically discover](https://apacheignite-cpp.readme.io/docs/cluster) each other. This helps to scale the cluster when needed, without having to restart the whole cluster.
+Developers can also leverage Ignite’s hybrid cloud support that allows establishing connection between private cloud and public clouds
+such as Amazon Web Services, providing them with best of both worlds.
+
+<p align="center">
+    <a href="https://apacheignite-cpp.readme.io/docs/cluster">
+        <img src="https://ignite.apache.org/images/advanced-clustering.png" />
+    </a>
+</p>
+
+
+## Data Grid (Cache)
+
+[Ignite data grid](https://apacheignite-cpp.readme.io/docs/data-grid) is an in-memory distributed key-value store which can be viewed as a distributed partitioned `Dictionary`, with every cluster node
+owning a portion of the overall data. This way the more cluster nodes we add, the more data we can cache.
+
+Unlike other key-value stores, Ignite determines data locality using a pluggable hashing algorithm. Every client can determine which node a key
+belongs to by plugging it into a hashing function, without a need for any special mapping servers or name nodes.
+
+Ignite data grid supports local, replicated, and partitioned data sets and allows to freely cross query between these data sets using standard SQL and LINQ syntax.
+Ignite supports standard SQL and LINQ for querying in-memory data including support for distributed joins.
+
+<p align="center">
+    <a href="https://apacheignite-cpp.readme.io/docs/data-grid">
+        <img src="https://ignite.apache.org/images/data_grid.png" vspace="15" width="450px"/>
+    </a>
+</p>
+
+## SQL Database
+
+Apache Ignite incorporates [distributed SQL database](https://apacheignite-cpp.readme.io/docs/sql-database) capabilities as a part of its platform. The database is horizontally
+ scalable, fault tolerant and SQL ANSI-99 compliant. It supports all SQL, DDL, and DML commands including SELECT, UPDATE,
+  INSERT, MERGE, and DELETE queries. It also provides support for a subset of DDL commands relevant for distributed
+  databases.
+
+With Ignite Durable Memory architecture, data as well as indexes can be stored both in memory and, optionally, on disk.
+This allows executing distributed SQL operations across different memory layers achieving in-memory performance with the durability of disk.
+
+You can interact with Apache Ignite using the SQL language via natively developed APIs for Java, .NET and C++, or via
+the Ignite JDBC or ODBC drivers. This provides a true cross-platform connectivity from languages such as PHP, Ruby and more.
+
+
+<p align="center">
+    <a href="https://apacheignite-cpp.readme.io/docs/sql-database">
+        <img src="https://ignite.apache.org/images/sql_database.png" vspace="15" width="400px"/>
+    </a>
+</p>
+
+## Compute Grid
+
+[Distributed computations](https://apacheignite-cpp.readme.io/docs/compute-grid) are performed in parallel fashion to gain high performance, low latency, and linear scalability.
+Ignite compute grid provides a set of simple APIs that allow users distribute computations and data processing across multiple computers in the cluster.
+Distributed parallel processing is based on the ability to take any computation and execute it on any set of cluster nodes and return the results back.
+
+<p align="center">
+    <a href="https://apacheignite-cpp.readme.io/docs/compute-grid">
+        <img src="https://ignite.apache.org/images/collocated_processing.png" vspace="15" width="400px"/>
+    </a>
+</p>
+
+We support these features, amongst others:
+
+* [Distributed Closure Execution](https://apacheignite-cpp.readme.io/docs/distributed-closures)
+* [Load Balancing](https://apacheignite-cpp.readme.io/docs/load-balancing)
+* [Job Scheduling](https://apacheignite-cpp.readme.io/docs/job-scheduling)
+* [Fault Tolerance](https://apacheignite-cpp.readme.io/docs/fault-tolerance)
+
+
+## Ignite Facts
+
+#### Is Ignite a persistent or pure in-memory storage?
+**Both**. Native persistence in Ignite can be turned on and off. This allows Ignite to store data sets bigger than can fit in the available memory. Essentially, the smaller operational data sets can be stored in-memory only, and larger data sets that do not fit in memory can be stored on disk, using memory as a caching layer for better performance.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/ignite-persistence)
+
+#### Is Ignite a distributed database?
+**Yes**. Data in Ignite is either *partitioned* or *replicated* across a cluster of multiple nodes. This provides scalability and adds resilience to the system. Ignite automatically controls how data is partitioned, however, users can plug in their own distribution (affinity) functions and collocate various pieces of data together for efficiency.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/sql-database)
+
+#### Is Ignite a relational SQL database?
+**Not fully**. Although Ignite aims to behave like any other relational SQL database, there are differences in how Ignite handles constraints and indexes. Ignite supports *primary* and *secondary* indexes, however, the *uniqueness* can only be enforced for the *primary* indexes. Ignite also does not support *foreign key* constraints.
+
+Essentially, Ignite purposely does not support any constraints that would entail a cluster broadcast message for each update and significantly hurt performance and scalability of the system.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/sql-database)
+
+#### Is Ignite an in-memory database?
+**Yes**. Even though Ignite *durable memory* works well in-memory and on-disk, the disk persistence can be disabled and Ignite can act as a pure *in-memory database*.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/sql-database)
+
+#### Is Ignite a transactional database?
+**Not fully**. ACID Transactions are supported, but only at *key-value* API level. Ignite also supports *cross-partition* transactions, which means that transactions can span keys residing in different partitions on different servers.
+
+At *SQL* level Ignite supports *atomic*, but not yet *transactional* consistency. Ignite community plans to implement SQL transactions in version 2.4.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/sql-database)
+
+#### Is Ignite a key-value store?
+**Yes**. Ignite provides a feature rich key-value API, that is JCache (JSR-107) compliant and supports Java, C++, and .NET.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/data-grid)
+
+#### Is Ignite an in-memory data grid?
+**Yes**. Ignite is a full-featured data grid, which can be used either in pure in-memory mode or with Ignite native persistence. It can also integrate with any 3rd party database, including any RDBMS or NoSQL store.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/data-grid)
+
+#### What is durable memory?
+Ignite *durable memory* architecture allows Ignite to extend in-memory computing to disk. It is based on a paged-based off-heap memory allocator which becomes durable by persisting to the *write-ahead-log (WAL)* and, then, to main Ignite persistent storage. When persistence is disabled, durable memory acts like a pure in-memory storage.
+
+[Read More](https://apacheignite-cpp.readme.io/docs/durable-memory)
+
+#### What is collocated processing?
+Ignite is a distributed system and, therefore, it is important to be able to collocate data with data and compute with data to avoid distributed data noise. Data collocation becomes especially important when performing distributed SQL joins. Ignite also supports sending user logic (functions, lambdas, etc.) directly to the nodes where the data resides and computing on the data locally.
+
+[Read More](https://apacheignite.readme.io/docs/collocate-compute-and-data)
+
+
+[apache-ignite-homepage]: https://ignite.apache.org/
+[getting-started]: https://apacheignite-cpp.readme.io/docs/getting-started-1
+[docs]: https://apacheignite-cpp.readme.io/docs
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/ignite/blob/8cc6a596/modules/platforms/dotnet/README.md
----------------------------------------------------------------------
diff --git a/modules/platforms/dotnet/README.md b/modules/platforms/dotnet/README.md
index 1549f05..d2d6191 100644
--- a/modules/platforms/dotnet/README.md
+++ b/modules/platforms/dotnet/README.md
@@ -1,6 +1,6 @@
-# Apache Ignite.NET In-Memory Data Fabric
+# Apache Ignite.NET In-Memory Computing Platform
 
-<img src="https://ignite.apache.org/images/logo3.png" hspace="20" /><img src="https://ptupitsyn.github.io/images/net-framework.png" hspace="20" />
+<a href="https://ignite.apache.org/"><img src="https://ignite.apache.org/images/logo3.png" hspace="20"/></a><img src="https://ptupitsyn.github.io/images/net-framework.png" hspace="20" />
 
 [![Join the chat at https://gitter.im/apacheignite/ignite](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/apacheignite/ignite?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
@@ -10,25 +10,108 @@
 
 <a href="http://ci.ignite.apache.org/viewType.html?buildTypeId=Ignite20Tests_IgnitePlatformNet&branch_IgniteTests=%3Cdefault%3E"><img src="http://ci.ignite.apache.org/app/rest/builds/buildType:(id:Ignite20Tests_IgnitePlatformNet)/statusIcon" /></a>
 
-Apache Ignite In-Memory Data Fabric is designed to deliver uncompromised performance for a wide set of in-memory computing use cases from 
-[high performance computing](https://ignite.apache.org/features.html), to the industry most advanced [data grid](https://ignite.apache.org/features.html), 
-highly available [service grid](https://ignite.apache.org/features.html), and [streaming](https://ignite.apache.org/features.html).
+## Getting Started
+
+For information on how to get started with Apache Ignite, please visit: [Getting Started][getting-started].
+
+## Full Documentation
+
+You can find the full Apache Ignite documentation here: [Full documentation][docs].
+
+## What is Apache Ignite?
+
+[Apache Ignite][apache-ignite-homepage] is the <b>in-memory</b> computing platform
+that is <b>durable</b>, <b>strongly consistent</b>, and <b>highly available</b>
+with powerful <b>SQL</b>, <b>key-value</b> and <b>processing</b> APIs.
+
+<p align="center">
+    <a href="https://apacheignite-net.readme.io/docs/">
+        <img src="https://ignite.apache.org/images/durable-memory.png" width="900px"/>
+    </a>
+</p>
+
+## Durable Memory
+Ignite's durable memory component treats RAM not just as a caching layer but as a complete fully functional storage layer. This means that users can turn the persistence on and off as needed. If the persistence is off, then Ignite can act as a distributed **in-memory database** or **in-memory data grid**, depending on whether you prefer to use SQL or key-value APIs. If the persistence is turned on, then Ignite becomes a distributed, **horizontally scalable database** that guarantees full data consistency and is resilient to full cluster failures.
+
+[Read More](https://apacheignite-net.readme.io/docs/durable-memory)
+
+## Ignite Persistence
+
+Ignite Native Persistence is a distributed, ACID, and SQL-compliant **disk store** that transparently integrates with Ignite's Durable Memory as an optional disk layer storing data and indexes on SSD, Flash, 3D XPoint, and other types of non-volatile storages.
+
+With the Ignite Persistence enabled, you no longer need to keep all the data and indexes in memory or warm it up after a node or cluster restart because the Durable Memory is tightly coupled with persistence and treats it as a secondary memory tier. This implies that if a subset of data or an index is missing in RAM, the Durable Memory will take it from the disk.
+
+<p align="center">
+    <a href="https://apacheignite.readme.io/docs/distributed-persistent-store">
+        <img src="https://ignite.apache.org/images/native_persistence.png" width="400px"/>
+    </a>
+</p>
+
+[Read More](https://apacheignite-net.readme.io/docs/ignite-persistent-store)
+
+## ACID Compliance
+Data stored in Ignite is ACID-compliant both in memory and on disk, making Ignite a **strongly consistent** system. Ignite transactions work across the network and can span multiple servers.
+
+[Read More](https://apacheignite-net.readme.io/docs/transactions)
+
+## Complete SQL Support
+Ignite provides full support for SQL, DDL and DML, allowing users to interact with Ignite using pure SQL without writing any code. This means that users can create tables and indexes as well as insert, update, and query data using only SQL. Having such complete SQL support makes Ignite a one-of-a-kind **distributed SQL database**.
+
+[Read More](https://apacheignite-net.readme.io/docs/sql-database)
+
+## Key-Value
+The in-memory data grid component in Ignite is a fully transactional **distributed key-value store** that can scale horizontally across 100s of servers in the cluster. When persistence is enabled, Ignite can also store more data than fits in memory and survive full cluster restarts.
+
+[Read More](https://apacheignite-net.readme.io/docs/data-grid)
+
+## Collocated Processing
+Most traditional databases work in a client-server fashion, meaning that data must be brought to the client side for processing. This approach requires lots of data movement from servers to clients and generally does not scale. Ignite, on the other hand, allows for sending light-weight computations to the data, i.e. **collocating** computations with data. As a result, Ignite scales better and minimizes data movement.
+
+[Read More](https://apacheignite-net.readme.io/docs/colocate-compute-and-data)
+
+## Scalability and Durability
+Ignite is an elastic, horizontally scalable distributed system that supports adding and removing cluster nodes on demand. Ignite also allows for storing multiple copies of the data, making it resilient to partial cluster failures. If the persistence is enabled, then data stored in Ignite will also survive full cluster failures. Cluster restarts in Ignite can be very fast, as the data becomes operational instantaneously directly from disk. As a result, the data does not need to be preloaded in-memory to begin processing, and Ignite caches will lazily warm up resuming the in memory performance.
+
+[Read More](https://apacheignite-net.readme.io/docs/cluster)
+
+##Ignite and Ignite.NET
+
+* Ignite.NET is built on top of Ignite.
+* .NET starts the JVM in the same process and communicates with it via JNI & C++.
+* .NET, C++ and Java nodes can join the same cluster, use the same caches, and interoperate using common binary protocol.
+* Java compute jobs can execute on any node (Java, .NET, C++).
+* .NET compute jobs can only execute on .NET nodes.
+
+## Ignite Components
+
+You can view Apache Ignite as a collection of independent, well-integrated components geared to improve performance and
+ scalability of your application.
+
+Some of these components include:
+* [Advanced Clustering](#advanced-clustering)
+* [Data Grid](##data-grid-jcache)
+* [SQL Database](#sql-database)
+* [Compute Grid](#compute-grid)
+* [Service Grid](#service-grid)
+
+Below you’ll find a brief explanation for each of them:
 
 ## Advanced Clustering
 
-Ignite nodes can automatically discover each other. This helps to scale the cluster when needed, without having to restart the whole cluster.
-Developers can also leverage from Ignite’s hybrid cloud support that allows establishing connection between private cloud and public clouds
+Ignite nodes can [automatically discover](https://apacheignite-net.readme.io/docs/cluster) each other. This helps to scale the cluster when needed, without having to restart the whole cluster.
+Developers can also leverage Ignite’s hybrid cloud support that allows establishing connection between private cloud and public clouds
 such as Amazon Web Services, providing them with best of both worlds.
 
 <p align="center">
-    <a href="https://apacheignite.readme.io/docs/cluster">
+    <a href="https://apacheignite-net.readme.io/docs/cluster">
         <img src="https://ignite.apache.org/images/advanced-clustering.png" />
     </a>
 </p>
 
+
 ## Data Grid (Cache)
 
-Ignite data grid is an in-memory distributed key-value store which can be viewed as a distributed partitioned `Dictionary`, with every cluster node
+[Ignite data grid](https://apacheignite-net.readme.io/docs/data-grid) is an in-memory distributed key-value store which can be viewed as a distributed partitioned `Dictionary`, with every cluster node
 owning a portion of the overall data. This way the more cluster nodes we add, the more data we can cache.
 
 Unlike other key-value stores, Ignite determines data locality using a pluggable hashing algorithm. Every client can determine which node a key
@@ -38,87 +121,69 @@ Ignite data grid supports local, replicated, and partitioned data sets and allow
 Ignite supports standard SQL and LINQ for querying in-memory data including support for distributed joins.
 
 <p align="center">
-    <a href="https://apacheignite.readme.io/docs/data-grid">
-        <img src="https://ignite.apache.org/images/in-memory-data-grid.jpg" />
+    <a href="https://apacheignite-net.readme.io/docs/data-grid">
+        <img src="https://ignite.apache.org/images/data_grid.png" vspace="15" width="450px"/>
     </a>
 </p>
 
-Our data grid offers many features, some of which are:
-
-* Primary & Backup Copies.
-* Near Caches.
-* Cache queries and SQL/LINQ queries.
-* Continuous Queries.
-* Transactions.
-* Off-Heap Memory.
-* Affinity Collocation.
-* Persistent Store.
-* Automatic Persistence.
-* Data Loading.
-* Eviction and Expiry Policies.
-* Data Rebalancing
-* Topology Validation.
-
-## Streaming & CEP
+## SQL Database
 
-Ignite streaming allows to process continuous never-ending streams of data in scalable and fault-tolerant fashion. The rates at which data can be injected into Ignite can be very high and easily exceed millions of events per second on a moderately sized cluster.
+Apache Ignite incorporates [distributed SQL database](https://apacheignite-net.readme.io/docs/sql-database) capabilities as a part of its platform. The database is horizontally
+ scalable, fault tolerant and SQL ANSI-99 compliant. It supports all SQL, DDL, and DML commands including SELECT, UPDATE,
+  INSERT, MERGE, and DELETE queries. It also provides support for a subset of DDL commands relevant for distributed
+  databases.
 
-Real-time data is ingested via data streamers. We offer streamers for JMS 1.1, Apache Kafka, MQTT, Twitter, Apache Flume and Apache Camel already, and we keep adding new ones every release.
+With Ignite Durable Memory architecture, data as well as indexes can be stored both in memory and, optionally, on disk.
+This allows executing distributed SQL operations across different memory layers achieving in-memory performance with the durability of disk.
 
-<p align="center">
-    <a href="https://apacheignite.readme.io/docs/streaming--cep">
-        <img src="https://ignite.apache.org/images/data-streamers.png" />
-    </a>
-</p>
+You can interact with Apache Ignite using the SQL language via natively developed APIs for Java, .NET and C++, or via
+the Ignite JDBC or ODBC drivers. This provides a true cross-platform connectivity from languages such as PHP, Ruby and more.
 
-The data can then be queried within sliding windows, if needed:
 
 <p align="center">
-    <a href="https://apacheignite.readme.io/docs/streaming--cep">
-        <img src="https://ignite.apache.org/images/sliding-event-window.png" />
+    <a href="https://apacheignite-net.readme.io/docs/sql-database">
+        <img src="https://ignite.apache.org/images/sql_database.png" vspace="15" width="400px"/>
     </a>
 </p>
 
 ## Compute Grid
 
-Distributed computations are performed in parallel fashion to gain high performance, low latency, and linear scalability. Ignite compute grid provides a set of simple APIs that allow users distribute computations and data processing across multiple computers in the cluster. Distributed parallel processing is based on the ability to take any computation and execute it on any set of cluster nodes and return the results back.
+[Distributed computations](https://apacheignite-net.readme.io/docs/compute-grid) are performed in parallel fashion to gain high performance, low latency, and linear scalability.
+Ignite compute grid provides a set of simple APIs that allow users distribute computations and data processing across multiple computers in the cluster.
+Distributed parallel processing is based on the ability to take any computation and execute it on any set of cluster nodes and return the results back.
 
 <p align="center">
-    <a href="https://apacheignite.readme.io/docs/compute-grid">
-        <img src="https://ignite.apache.org/images/in_memory_compute.png" />
+    <a href="https://apacheignite-net.readme.io/docs/compute-grid">
+        <img src="https://ignite.apache.org/images/collocated_processing.png" vspace="15" width="400px"/>
     </a>
 </p>
 
 We support these features, amongst others:
 
-* Distributed Closure Execution.
-* MapReduce & ForkJoin Processing.
-* Clustered Executor Service.
-* Collocation of Compute and Data.
-* Load Balancing.
-* Fault Tolerance.
-* Job State Checkpointing.
-* Job Scheduling.
+* [Distributed Closure Execution](https://apacheignite-net.readme.io/docs/distributed-closures)
+* [MapReduce & ForkJoin Processing](https://apacheignite-net.readme.io/docs/mapreduce-forkjoin)
+* [Collocation of Compute and Data](https://apacheignite-net.readme.io/docs/colocate-compute-and-data)
+* [Fault Tolerance](https://apacheignite-net.readme.io/docs/fault-tolerance)
 
 ## Service Grid
 
-Service Grid allows for deployments of arbitrary user-defined services on the cluster. You can implement and deploy any service, such as custom counters, ID generators, hierarchical maps, etc.
+[Service Grid](https://apacheignite-net.readme.io/docs/service-grid) allows for deployments of arbitrary user-defined services on the cluster. You can implement and deploy any service, such as custom counters, ID generators, hierarchical maps, etc.
 
 Ignite allows you to control how many instances of your service should be deployed on each cluster node and will automatically ensure proper deployment and fault tolerance of all the services.
 
 <p align="center">
-    <a href="https://apacheignite.readme.io/docs/service-grid">
-        <img src="https://ignite.apache.org/images/ignite_service.png" vspace="15"/>
+    <a href="https://apacheignite-net.readme.io/docs/service-grid">
+        <img src="https://ignite.apache.org/images/service_grid.png" vspace="15" width="400px"/>
     </a>
 </p>
 
 ## Distributed Data Structures
 
-Ignite.NET supports complex data structures in a distributed fashion: `AtomicLong`, `AtomicReference`, `AtomicSequence`.
+Ignite.NET supports complex [data structures](https://apacheignite-net.readme.io/docs/atomic-types) in a distributed fashion: `AtomicLong`, `AtomicReference`, `AtomicSequence`.
 
 ## Distributed Messaging
 
-Distributed messaging allows for topic based cluster-wide communication between all nodes. Messages with a specified message topic can be distributed to
+[Distributed messaging](https://apacheignite-net.readme.io/docs/topic-based) allows for topic based cluster-wide communication between all nodes. Messages with a specified message topic can be distributed to
 all or sub-group of nodes that have subscribed to that topic.
 
 Ignite messaging is based on publish-subscribe paradigm where publishers and subscribers are connected together by a common topic.
@@ -126,7 +191,7 @@ When one of the nodes sends a message A for topic T, it is published on all node
 
 ## Distributed Events
 
-Distributed events allow applications to receive notifications when a variety of events occur in the distributed grid environment.
+[Distributed events](https://apacheignite-net.readme.io/docs/local-and-remote-events) allow applications to receive notifications when a variety of events occur in the distributed grid environment.
 You can automatically get notified for task executions, read, write or query operations occurring on local or remote nodes within the cluster.
 
 ## ASP.NET Integration
@@ -137,15 +202,59 @@ Ignite.NET provides [Output Cache](https://apacheignite-net.readme.io/docs/aspne
 
 Ignite.NET [Entity Framework Second Level Cache](https://apacheignite-net.readme.io/docs/entity-framework-second-level-cache) improves Entity Framework performance by storing query results in Ignite caches. 
 
-## Getting Started
+## Ignite Facts
 
-For information on how to get started with Apache Ignite please visit: [Getting Started][getting-started].
+#### Is Ignite a persistent or pure in-memory storage?
+**Both**. Native persistence in Ignite can be turned on and off. This allows Ignite to store data sets bigger than can fit in the available memory. Essentially, the smaller operational data sets can be stored in-memory only, and larger data sets that do not fit in memory can be stored on disk, using memory as a caching layer for better performance.
 
-## Full Documentation
+[Read More](https://apacheignite-net.readme.io/docs/ignite-persistent-store)
+
+#### Is Ignite a distributed database?
+**Yes**. Data in Ignite is either *partitioned* or *replicated* across a cluster of multiple nodes. This provides scalability and adds resilience to the system. Ignite automatically controls how data is partitioned, however, users can plug in their own distribution (affinity) functions and collocate various pieces of data together for efficiency.
+
+[Read More](https://apacheignite-net.readme.io/docs/sql-database) 
+
+#### Is Ignite a relational SQL database?
+**Not fully**. Although Ignite aims to behave like any other relational SQL database, there are differences in how Ignite handles constraints and indexes. Ignite supports *primary* and *secondary* indexes, however, the *uniqueness* can only be enforced for the *primary* indexes. Ignite also does not support *foreign key* constraints. 
+
+Essentially, Ignite purposely does not support any constraints that would entail a cluster broadcast message for each update and significantly hurt performance and scalability of the system.
+
+[Read More](https://apacheignite-net.readme.io/docs/sql-database) 
+
+#### Is Ignite an in-memory database?
+**Yes**. Even though Ignite *durable memory* works well in-memory and on-disk, the disk persistence can be disabled and Ignite can act as a pure *in-memory database*.
+
+[Read More](https://apacheignite-net.readme.io/docs/sql-database) 
+
+#### Is Ignite a transactional database?
+**Not fully**. ACID Transactions are supported, but only at *key-value* API level. Ignite also supports *cross-partition* transactions, which means that transactions can span keys residing in different partitions on different servers.
+
+At *SQL* level Ignite supports *atomic*, but not yet *transactional* consistency. Ignite community plans to implement SQL transactions in version 2.4.
+
+[Read More](https://apacheignite-net.readme.io/docs/sql-database) 
+
+#### Is Ignite a key-value store?
+**Yes**. Ignite provides a feature rich key-value API, that is JCache (JSR-107) compliant and supports Java, C++, and .NET.
+
+[Read More](https://apacheignite-net.readme.io/docs/data-grid) 
+
+#### Is Ignite an in-memory data grid?
+**Yes**. Ignite is a full-featured data grid, which can be used either in pure in-memory mode or with Ignite native persistence. It can also integrate with any 3rd party database, including any RDBMS or NoSQL store.
+
+[Read More](https://apacheignite-net.readme.io/docs/data-grid) 
+
+#### What is durable memory?
+Ignite *durable memory* architecture allows Ignite to extend in-memory computing to disk. It is based on a paged-based off-heap memory allocator which becomes durable by persisting to the *write-ahead-log (WAL)* and, then, to main Ignite persistent storage. When persistence is disabled, durable memory acts like a pure in-memory storage.
+
+[Read More](https://apacheignite-net.readme.io/docs/durable-memory) 
+
+#### What is collocated processing?
+Ignite is a distributed system and, therefore, it is important to be able to collocate data with data and compute with data to avoid distributed data noise. Data collocation becomes especially important when performing distributed SQL joins. Ignite also supports sending user logic (functions, lambdas, etc.) directly to the nodes where the data resides and computing on the data locally.
+
+[Read More](https://apacheignite-net.readme.io/docs/colocate-compute-and-data) 
 
-You can find the full Apache Ignite documentation here: [Full documentation][docs].
 
-[apache-homepage]: https://ignite.apache.org/
+[apache-ignite-homepage]: https://ignite.apache.org/
 [getting-started]: https://apacheignite-net.readme.io/docs/getting-started-2
 [docs]: https://apacheignite-net.readme.io/docs
 


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