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From Bruno Mahé <bm...@apache.org>
Subject Re: [VOTE] Phoenix for incubator project
Date Fri, 06 Dec 2013 09:59:43 GMT
On 12/05/2013 01:43 PM, Stack wrote:
> Discussion of the Phoenix proposal has settled since its original
> posting on November 7th.  Feedback has been incorporated.
>
> Let us now move to a vote.
>
> Should Phoenix become an Apache incubator project?
>
> [] +1 Accept Phoenix into the Incubator
> [] +0 Don't care whether or which
> [] -1 Do not accept Phoenix into the Incubator because...
>
> The latest version of the proposal can be found here [1].  It is
> also posted below for your convenience.
>
> Let the vote run 72 hours.
>
> Thank you,
> St.Ack
>
> 1. https://wiki.apache.org/incubator/PhoenixProposal
>
>
>
>
> Abstract
>
> Phoenix is an open source SQL query engine for Apache HBase, a NoSQL data
> store. It is accessed as a JDBC driver and enables querying and managing
> HBase tables using SQL.
>
> Proposal
>
> Phoenix is an open source SQL skin over HBase delivered as a
> client-embedded JDBC driver targeting low latency queries over HBase data.
> Phoenix takes your SQL query, compiles it into a series of HBase scans, and
> orchestrates the running of those scans to produce regular JDBC result
> sets. The table metadata is stored in an HBase table and versioned, such
> that snapshot queries over prior versions will automatically use the
> correct schema. Direct use of the HBase API, along with coprocessors and
> custom filters, results in performance on the order of milliseconds for
> small queries, or seconds for tens of millions of rows. Phoenix interfaces
> with both Pig and Map-reduce for the input and output of data.
>
> Background
>
> Phoenix initially started as an internal project at Salesforce.com to
> efficiently analyze big data stored in HBase. It was open sourced on Github
> about a year ago in Jan 2013. Over time Phoenix, together with HBase as the
> storage tier, has begun to evolve into a general SQL database with support
> for metadata management, secondary indexes, joins, query optimization, and
> multi-tenancy. This is expected to continue as Phoenix implements a
> cost-based query optimizer and potentially transaction support, and
> surfaces new HBase security features such as encryption and cell-level
> security. Phoenix's developer community has also grown to include
> additional companies such as Intel, who have contributed join support to
> Phoenix, as well as Hortonworks, who are in the process of porting Phoenix
> to the 0.96 release of HBase.
>
> Rationale
>
> As usage and the number of contributors to Phoenix has grown, we have
> sought for a long-term home for the project, and we believe the Apache
> foundation would be a great fit. Joining Apache would ensure that tried and
> true processes and procedures are in place for the growing number of
> organizations interested in contributing to Phoenix. Phoenix is also a good
> fit for the Apache foundation: Phoenix already interoperates with several
> existing Apache projects (HBase, Hadoop, Pig, BigTop). The Phoenix team is
> familiar with the Apache process and and believes in the Apache mission -
> the team already includes multiple Apache committers.
>
> Initial Goals
>
> The initial goals will be to move the existing codebase to Apache and
> integrate with the Apache development process. Once this is accomplished,
> we plan for incremental development and releases that follow the Apache
> guidelines.
>
> Current Status
>
> Phoenix has undergone two major and three minor releases (1.0, 1.1, 1.2,
> 2.0, and 2.1) as well as many patch releases. Phoenix is being used in
> production by Salesforce.com as well as at other organizations. The Phoenix
> codebase is currently hosted at github.com, which will form the basis of
> the Apache git repository.
>
> Meritocracy
>
> The Phoenix project already operates on meritocratic principles. Phoenix
> has several developers from various organizations outside of Salesforce.com
> who have contributed major new features. While this process has remained
> mostly informal, as we do not have an official committer list, an implicit
> organization exists in which individuals who contribute major components
> act as maintainers for those modules. If accepted, the Phoenix project
> would include several of these participants as initial committers. We will
> work to identify all committers and PPMC members for the project and to
> operate under the ASF meritocratic principles.
>
> Community
>
> Acceptance into the Apache foundation would bolster the already strong user
> and developer community around Phoenix. That community includes many
> contributors from various other companies, and an active mailing list
> composed of hundreds of users.
>
> Core Developers
>
> The core developers of our project are listed in our contributors and
> initial PPMC below. Though many are employed at Salesforce.com, there is a
> representative cross sampling of other organizations including Intel,
> Hortonworks, and Cloudera.
>
> Alignment
>
> Our proposed Phoenix effort aligns closely with Apache HBase. The HBase
> project perimeter is denoted by a simple byte-array based Create, Read,
> Update, Delete and Scan APIs with no current plans to extend beyond this
> bounds. Phoenix complements this with a higher level API in SQL with which
> many are already familiar. At first glance, it may seem that Phoenix should
> just be folded into HBase as a new module. However, the focus of the two
> projects will be quite different, especially as Phoenix matures. With
> secondary indexing and joins just having been introduced into Phoenix, the
> next big frontier will be to implement a cost-based query optimizer. This
> is the heart-and-soul of most relational databases and can can take a
> lifetime to get right.
>
> HBase is focused on being a scalable data store agnostic to types and
> schema. Phoenix would layer typing, and relational facilities on top of
> this scalable store. By keeping Apache HBase and Phoenix separate, both may
> evolve independently and at different rates. Though the focus of the two
> projects is different, the relationship between them is very positive and
> mutually beneficial. New features in HBase will be leveraged in Phoenix as
> it makes sense to surface these in a SQL paradigm. In addition, Phoenix may
> drive new features in HBase, as evidenced by the new type system recently
> introduced into HBase. This will enable better interoperability between
> Apache Hive, standalone HBase uses case, and Phoenix by defining a standard
> serialization format.
>
> Phoenix can be divided into a front end and a back end. The front end is
> delivered as a JDBC driver and contains, among other things, the SQL parser
> and query planner. The front end is currently written for the HBase client
> API but could be extended to support other data stores in the Apache family.
>
> The back end is, currently, HBase specific components for pushing as much
> work to the server as possible. However, if there were sufficient interest
> to build them, contributions to Phoenix of new back ends for other data
> stores in the Apache family would be feasible.
>
> Other projects exists that perform SQL over HBase data (such as Apache
> Hive), however these products do not provide the same low latency query
> capabilities as Phoenix. Instead, they are more oriented around maximizing
> throughput for batched operations. Phoenix opens the door to a completely
> new set of use cases for Apache HBase that demand a more interactive user
> experience.
>
> There are also a number of related Apache projects and dependencies that
> are mentioned in the Relationships with Other Apache products section.
>
> Known Risks
>
> Orphaned Products
>
> Given the current level of investment in Phoenix - the risk of the project
> being abandoned is minimal. All current and planned HBase use cases at
> Salesforce.com go through Phoenix. In addition, both Intel and Hortonworks
> plan to include Phoenix in their distributions. Other companies have
> devoted significant internal infrastructure investment in Phoenix.
>
> Inexperience with Open Source
>
> Phoenix has existed as a healthy open source project for almost a year.
> During that time, James, Mujtaba, and others have successfully fostered an
> open-source community, attracting users and developers from a diverse group
> of companies including Intel, Intuit, Bloomberg, Tagged, and Hortonworks.
> Although neither are committers on other Apache projects, both James and
> Mujtaba have experience working with and contributing to other Apache
> projects.
>
> Homogenous Developers
>
> The initial list of committers includes developers from several
> institutions, including Salesforce, Intel, and Hortonworks.
>
> Reliance on Salaried Developers
>
> Like most open source projects, Phoenix receives substantial support from
> salaried developers. A large fraction of Phoenix development is supported
> by Salesforce.com. In addition, those working from within corporations and
> universities often devote “after hours” or spare time to the project. We
> will continue our efforts to ensure stewardship of the project to be
> independent of salaried developers.
>
> Relationship with Other Apache Products
>
> Although Phoenix provides a higher level abstraction than Apache HBase by
> hiding its client APIs, Phoenix relies on Apache HBase for both storing and
> retrieving data. It also inter-operates with Apache HBase by allowing
> existing data, not created by Phoenix, to be queried. In addition, both
> Apache Pig and Hadoop are supported for data input and output. Finally, the
> Phoenix is included and installable through Apache Bigtop and the build and
> test suite are run through Apache Maven.
>
> Phoenix offers an alternative query engine to Apache Hadoop (MapReduce).
> Unlike MapReduce, Phoenix is designed for lower-latency, OLTP, and
> interactive workloads. This makes the projects complimentary as users may
> run MapReduce and Phoenix side-by-side.
>
> We plan to increase the interoperability between Phoenix, Apache Hive, and
> standalone Apache HBase usage by standardizing on a new type system that
> has been introduced in the current major release of HBase. By all these
> products adopting this new serialization format, interoperability between
> them will take a big step forward.
>
> In addition, we plan to explore providing lower level APIs for other
> products such as Apache Drill to plug into when querying HBase data so that
> they get the performance benefits of using Phoenix.
>
> A Excessive Fascination with the Apache Brand
>
> Phoenix is already a healthy and relatively well known open source project.
> This proposal is not for the purpose of generating publicity. Rather, the
> primary benefits to joining Apache are those outlined in the Rationale
> section.
>
> Documentation
>
> Additional documentation on Phoenix may be found on its github website:
>
> Phoenix overview:
> https://github.com/forcedotcom/phoenix/blob/master/README.md
>
> Phoenix wiki: https://github.com/forcedotcom/phoenix/wiki
>
> Phoenix road map: https://github.com/forcedotcom/phoenix/wiki#roadmap
>
> Phoenix issue tracking:
> https://github.com/forcedotcom/phoenix/issues?direction=desc&sort=updated&state=open
>
> Phoenix codebase: https://github.com/forcedotcom/phoenix
>
> Phoenix SQL language reference: http://forcedotcom.github.io/phoenix/
>
> Phoenix performance:
> https://github.com/forcedotcom/phoenix/wiki/Performance#phoenix-vs-related-products
>
> User group: https://groups.google.com/group/phoenix-hbase-user
>
> Initial Source
>
> The Phoenix codebase is currently hosted on Github:
> https://github.com/forcedotcom/phoenix.
>
> Source and Intellectual Property Submission Plan
>
> Currently, the Phoenix codebase is distributed under a BSD license. Upon
> entering Apache, the Phoenix license will be migrated to the Apache 2.0
> License.
>
> External Dependencies
>
> Beyond relying on Apache HBase, Phoenix has the following external
> dependencies:
>
> ANTLR 3.5 (BSD license: http://www.antlr3.org/license.html)
>
> Sqlline 1.1.2 (BSD license:
> https://github.com/julianhyde/sqlline/blob/master/LICENSE)
>
> Open CSV 2.3 (Apache 2.0 license)
>
> Upon acceptance to the incubator, we would begin a thorough analysis of all
> transitive dependencies to verify this information and introduce license
> checking into the build and release process by integrating with Apache Rat.
>
> Required Resources
>
> Mailing list
>
> We will migrate the existing Phoenix mailing lists as follows:
>
> phoenix-hbase-user@googlegroups.com --> users@phoenix.incubator.apache.org
>
> phoenix-hbase-dev@googlegroups.com --> dev@phoenix.incubator.apache.org
>
> private@phoenix.incubator.apache.org for IPMC members
>
> commits@phoenix.incubator.apache.org
>
> The latter is to be consistent with the new PIAO naming scheme for podlings.
>
> Source control
>
> The Phoenix team would like to use Git for source control, due to our
> current use of Git. We request a writeable Git repo for Phoenix, and
> mirroring to be set up to Github through INFRA.
>
> Issue Tracking
>
> Phoenix currently uses the github issue tracking system associated with its
> github repo:
> https://github.com/forcedotcom/phoenix/issues?direction=desc&sort=updated&state=open.
> We will migrate to the Apache JIRA:
> http://issues.apache.org/jira/browse/PHOENIX
>
> Other Resources
>
> Jenkins/Hudson for builds and test running.
> Wiki for documentation purposes
> Blog to improve project dissemination
>
> Initial Committers
>
> James Taylor <jtaylor at salesforce dot com>
>
> Mujtaba Chohan <mchohan at salesforce dot com>
>
> Jesse Yates <jyates at apache dot org>
>
> Eli Levine <elevine at salesforce dot com>
>
> Simon Toens <stoens at salesforce dot com>
>
> Maryann Xue <wei.xue at intel dot com>
>
> Anoop Sam John <anoopsamjohn at apache dot org>
>
> Ramkrishna S Vasudevan <ramkrishna at apache dot org>
>
> Jeffrey Zhong <jeffreyz at apache dot org>
>
> Nick Dimiduk <ndimiduk at apache dot org>
>
> Affiliations
>
> The initial committers are from three organizations: Salesforce.com, Intel,
> and Hortonworks.
>
> James Taylor (Salesforce.com)
> Mujtaba Chohan (Salesforce.com)
> Jesse Yates (Salesforce.com)
> Eli Levine (Salesforce.com)
> Simon Toens (Salesforce.com)
> Maryann Xue (Intel)
> Anoop Sam John (Intel)
> Ramkrishna S Vasudevan (Intel)
> Jeffrey Zhong (Hortonworks)
> Nick Dimiduk (Hortonworks)
>
> Sponsors
>
> Champion
>
> Michael Stack
>
> Nominated Mentors
>
> Michael Stack
> Lars Hofhansl
> Andrew Purtell
> Devaraj Das
> Enis Soztutar
> Steven Noels
>
> Sponsoring Entity
>
> The Apache Incubator
>


+1

Thanks,
Bruno

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