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From Hyunsik Choi <hyun...@apache.org>
Subject Re: [DISCUSS] S2Graph Incubator Proposal
Date Thu, 12 Nov 2015 01:47:37 GMT
Hi Luke,

Thank you for your interest in S2Graph project. If you don't mind,
we'd like to add you to the initial committer list. I think that your
experience and skills about HBase would be very helpful to S2Graph
project.

Best regards,
Hyunsik

On Mon, Nov 9, 2015 at 6:58 PM, Luke Han <luke.hq@gmail.com> wrote:
> I'm very interesting about this project, would love to help but I'm not
> IPMC member.
>
> Please let me know if there's anything I could help on.
>
> Thanks.
>
>
> Best Regards!
> ---------------------
>
> Luke Han
>
> On Tue, Nov 10, 2015 at 9:03 AM, Hyunsik Choi <hyunsik@apache.org> wrote:
>
>> Hi Seetharam,
>>
>> Thank you for your volunteering! I've added your name to the mentor list.
>>
>> I also updated the initial committer list and affiliations via google
>> search.
>> If I wrote wrong affiliations, please let me know.
>>
>> Best regards,
>> Hyunsik
>>
>>
>> On Mon, Nov 9, 2015 at 4:21 PM, Seetharam Venkatesh
>> <venkatesh@innerzeal.com> wrote:
>> > Hi Hyunsik,
>> >
>> > If you are still looking for mentors, let me volunteer as one.
>> >
>> > Thanks!
>> >
>> > On Mon, Nov 9, 2015 at 3:45 PM Hyunsik Choi <hyunsik@apache.org> wrote:
>> >
>> >> Thank you all guys  I just put you names on the nominated mentor list.
>> >>
>> >> @Andrew,
>> >>
>> >> I agree with you. S2Graph already has good relationships with other
>> >> ASF projects, such as HBase and Spark,  In addition, they have a plan
>> >> to expand its relationship to Apache incubator TinkerPop, which is a
>> >> graph computing framework. I'm looking forward to their combinations.
>> >>
>> >> @Sergio,
>> >>
>> >> Thank you for attending the talk and joining the S2Graph mentors. That
>> >> was Doyung Yoon, one of the S2Graph creators. He had a talk at the
>> >> last ApacheCon.
>> >>
>> >> On Mon, Nov 9, 2015 at 11:58 AM, Sergio Fernández <wikier@apache.org>
>> >> wrote:
>> >> > Hi Hyunsik, I attended your talk at the last ApacheCon, and I think
S2
>> >> has
>> >> > quite some potential. So if you need a mentor, count me in!
>> >> >
>> >> > On Mon, Nov 9, 2015 at 7:54 PM, Hyunsik Choi <hyunsik@apache.org>
>> wrote:
>> >> >
>> >> >> This project is looking for mentors. Anyone can help? We are also
>> >> >> looking forward to any feedback.
>> >> >>
>> >> >> Also, I attached the proposal here. I forgot it.
>> >> >>
>> >> >> ----------------
>> >> >>
>> >> >> = S2Graph Proposal =
>> >> >>
>> >> >> == Abstract ==
>> >> >> S2Graph is a distributed and scalable OLTP graph database built
on
>> >> >> HBase to support fast traversal on extremely large graph.
>> >> >>
>> >> >> Here are additional materials to introduce S2Graph.
>> >> >>  * HBaseCon 2015 -
>> >> http://www.slideshare.net/HBaseCon/use-cases-session-5
>> >> >>  * Apache: Big Data 2015 -
>> >> >>
>> http://schd.ws/hosted_files/apachebigdata2015/06/s2graph_apache_con.pdf
>> >> >>
>> >> >> == Proposal ==
>> >> >> S2Graph is to provide a scalable distributed graph database engine
>> >> >> over key/value storage such as HBase. S2Graph provide fully
>> >> >> ashynchronous API to manupulate data as property graph model and
fast
>> >> >> breadth first search query on graph.
>> >> >>
>> >> >> == Background ==
>> >> >> S2Graph initially started as an internal project at Kakao.com to
>> >> >> efficiently store user relation and user activities as one large
>> graph
>> >> >> and provide unified query to traverse graph. It was open sourced
on
>> >> >> Github about a 3 months ago in June 2015.
>> >> >>
>> >> >> Over time S2Graph, together with HBase as storage tier, has begun
to
>> >> >> be adapted into various applications, such as messaging, social
>> feeds,
>> >> >> realtime recommendations at Kakao.
>> >> >>
>> >> >> Users can benefit from S2Graph`s generalized high level API instead
>> of
>> >> >> low-level key/value API for graph abstraction, just like Phoenix
>> >> >> provide SQL layer over HBase.
>> >> >>
>> >> >> == Rationale ==
>> >> >> Graph data(highly interconnected data) is very abundant and important
>> >> >> these days.
>> >> >> When users have a multitude of relationships, each with complex
>> >> >> properties associated with them, graph model is more intuitive
and
>> >> >> efficient than tabular format(RDBMS).
>> >> >> There are many ASF projects that provide SQL layer, but there is
no
>> >> >> ASF projects that provide scalable graph layer on existing hadoop
>> echo
>> >> >> system.
>> >> >> When graph data grows to trillion edge scale, the process of
>> >> >> traversing takes a long time and costly. However, with the benefit
of
>> >> >> HBase`s scalable architecture, S2Graph can traverse large graph
in
>> >> >> breadth first search manner efficiently.
>> >> >>
>> >> >> S2Graph also interoperates with several existing Apache
>> >> >> projects(HBase, Spark) to provide way to merge real time events
and
>> >> >> batch processed data using property graph data model.
>> >> >>
>> >> >> Many developers are running their own domain specific API servers
to
>> >> >> serve their data products, but graph model is general and S2Graph
API
>> >> >> fully support traverse on graph, so it can be used as scalable
>> general
>> >> >> purpose API serving layer for various domains.
>> >> >> As long as data can be modeled as graph, then users can avoid tedious
>> >> >> work for developing customized API servers by using S2Graph.
>> >> >>
>> >> >> == 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 ==
>> >> >>
>> >> >> === Meritocracy ===
>> >> >> S2Graph operated on meritocratic principles from the get go.
>> >> >> Currently, all the discussions pertaining to S2Graph development
are
>> >> >> public on Github. The current incubation
>> >> >> proposal includes the major code contributors to S2Graph. Several
>> >> >> additional people have worked on the S2graph codebase for industry
>> use
>> >> >> cases and would be interested in becoming committers. We are starting
>> >> >> with a small committer group and we plan to add additional committers
>> >> >> following an open merit-based decision process during the incubation
>> >> >> phase.
>> >> >>
>> >> >> === Community ===
>> >> >> We have already begun building a community but at this time the
>> >> >> community consists only of S2Graph developers – all Kakao employees
–
>> >> >> and prospective users.
>> >> >> S2Graph seeks to develop developer and user communities during
>> >> incubation.
>> >> >>
>> >> >> === Core Developers ===
>> >> >> S2Graph is currently being designed and developed by 2 engineers
from
>> >> >> Kakao. - Doyung Yoon, Deawon Jeong.
>> >> >>
>> >> >> === Alignment ===
>> >> >> Our proposed S2Graph 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.
>> >> >>
>> >> >> S2Graph complements this with a higher level API for property graph
>> >> model.
>> >> >>
>> >> >> S2Graph was designed to offer scalable distributed graph database
>> skin
>> >> >> over HBase from the beginning in order to provide property graph
>> model
>> >> >> and breadth first search, and continue to focus on providing graph
>> >> >> model.
>> >> >>
>> >> >> == Known Risks ==
>> >> >> === Orphaned Products ===
>> >> >> The core developers of S2Graph team plan to work full time on this
>> >> >> project. There is very little risk of S2Graph getting orphaned
since
>> >> >> at least one large company (Kakao) is extensively using it in their
>> >> >> production HBase clusters. For example, currently there are 20+
use
>> >> >> cases with more than 1+Trillion edges and 140 million breadth first
>> >> >> search query requests per minute using S2Graph in production.
>> >> >> We plan to extend and diversify this community further through
>> Apache.
>> >> >>
>> >> >> === Inexperience with Open Source ===
>> >> >> The core developers are all active users and followers of open
>> source.
>> >> >> They are already committers and contributors to the S2Graph Github
>> >> >> project. All have been involved with the source code that has been
>> >> >> released under an open source license. Though the core set of
>> >> >> Developers do not have Apache Open Source experience, there are
plans
>> >> >> to onboard individuals with Apache open source experience on to
the
>> >> >> project.
>> >> >>
>> >> >> === Homogenous Developers ===
>> >> >> Most committers in this proposal belong to the same institution
>> >> >> (Kakao). The engagement of these committers goes well beyond the
>> >> >> necessary development to support research, and all committers work
on
>> >> >> S2Graph full time.
>> >> >> Several people from other institutions are working on and are
>> familiar
>> >> >> with the S2Graph codebase. We will work to attract them as future
>> >> >> committers during the incubation phase, following a merit-based
>> >> >> approach.
>> >> >>
>> >> >> === Reliance on Salaried Developers ===
>> >> >> Kakao invested in S2Graph as the distributed graph database solution
>> >> >> on top of HBase and some of its key engineers are working full
time
>> on
>> >> >> the project.
>> >> >> We look forward to other Apache developers and researchers to
>> >> >> contribute to the project.
>> >> >> Also key to addressing the risk associated with relying on Salaried
>> >> >> developers from a single entity is to increase the diversity of
the
>> >> >> contributors and actively lobby for Domain experts in the graph
>> >> >> database space to contribute. Apache S2Graph intends to do this.
>> >> >>
>> >> >> === Relationships with Other Apache Products ===
>> >> >> S2Graph has a strong relationship and dependency with Apache Hadoop
>> >> >> HBase and Spark.
>> >> >> Being part of Apache’s Incubation community, could help with
a closer
>> >> >> collaboration among these two projects and as well as others.
>> >> >>
>> >> >> In terms of graph processing frameworks, S2Graph and Apache Giraph
>> >> >> look similar. However, their goals are apparently different to
each
>> >> >> other. Giraph aims at analytical batch processing on immutable
graph
>> >> >> data sets. In contrast, S2Graph is designed for OLTP-like workloads
>> on
>> >> >> graph data sets, and S2Graph provides INSERT/UPDATE operations
too.
>> >> >>
>> >> >>
>> >> >> === An Excessive Fascination with the Apache Brand ===
>> >> >> S2Graph is proposing to enter incubation at Apache in order to
help
>> >> >> efforts to diversify the committer-base, not so much to capitalize
on
>> >> >> the Apache brand. The S2Graph project is in production use already
>> >> >> inside Kakao, but is not expected to be an Kakao product for external
>> >> >> customers. As such, the S2Graph project is not seeking to use the
>> >> >> Apache brand as a marketing tool.
>> >> >>
>> >> >> == Documentation ==
>> >> >> Information about S2Graph can be found at
>> >> >> https://github.com/kakao/s2graph. The following links provide more
>> >> >> information about S2Graph in open source:
>> >> >>  * S2Graph web site:
>> >> https://steamshon.gitbooks.io/s2graph-book/content/
>> >> >>  * Codebase at Github: https://github.com/kakao/s2graph
>> >> >>  * Issue Tracking: https://github.com/kakao/s2graph/issues
>> >> >>  * User community: https://groups.google.com/forum/#!forum/s2graph
>> >> >>
>> >> >> == Initial Source ==
>> >> >>
>> >> >> The S2Graph codebase is currently hosted on Github:
>> >> >> https://github.com/kakao/s2graph
>> >> >>
>> >> >> === Source and Intellectual Property Submission Plan ===
>> >> >>
>> >> >> Currently, the S2Graph codebase is distributed under the Apache
2.0
>> >> >> License.
>> >> >>
>> >> >> == External Dependencies ==
>> >> >>
>> >> >> Beyond relying on Apache HBase, Phoenix has the following external
>> >> >> dependencies:
>> >> >>  * Asynchbase (BSD license: http://www.antlr3.org/license.html)
>> >> >>  * Mysql (BSD license:
>> >> >> https://github.com/julianhyde/sqlline/blob/master/LICENSE)
>> >> >>  * Play Framework (Apache 2.0 license:
>> >> >> https://github.com/playframework/playframework)
>> >> >>  * Scala (https://github.com/scala/scala)
>> >> >>  * Spark
>> >> >>  * Kafka
>> >> >>
>> >> >> == Required Resources ==
>> >> >>
>> >> >> === Mailing list ===
>> >> >>
>> >> >> We will migrate our mailing lists to the following:
>> >> >>  * users@s2graph.incubator.apache.org
>> >> >>  * dev@s2graph.incubator.apache.org
>> >> >>  * private@s2graph.incubator.apache.org
>> >> >>  * commits@s2graph.incubator.apache.org
>> >> >>
>> >> >> === Source control ===
>> >> >>
>> >> >> The S2Graph team would like to use Git for source control, due
to our
>> >> >> current use of Git. We request a writeable Git repo for S2Graph,
and
>> >> >> mirroring to be set up to Github through INFRA.
>> >> >>
>> >> >> === Issue Tracking ===
>> >> >>
>> >> >> S2Graph currently uses the github issue tracking system associated
>> >> >> with its github repo: https://github.com/kakao/s2graph/issues.
We
>> will
>> >> >> migrate to the Apache JIRA:
>> >> >> http://issues.apache.org/jira/browse/S2Graph
>> >> >>
>> >> >> === Other Resources ===
>> >> >>
>> >> >> Jenkins/Hudson for builds and test running.
>> >> >> Wiki for documentation purposes
>> >> >> Blog to improve project dissemination
>> >> >>
>> >> >> == Initial Committers ==
>> >> >>
>> >> >>  * Doyung Yoon <shom83 at gmail.com>
>> >> >>  * Daewon Jeong <blueiur at gmail.com>
>> >> >>  * Jaesang Kim <honeysleep at gmail.com>
>> >> >>  * Hwansung Yu <deejayfwan at gmail.com>
>> >> >>  * Min-Seok Kim <mskim.org at gmail.com>
>> >> >>  * Chul Kang <miralchul at gmail.com>
>> >> >>
>> >> >> == Affiliations ==
>> >> >>
>> >> >> The initial committers are from one organizations: Kakao.
>> >> >>  * Doyung Yoon, Kakao
>> >> >>  * Daewon Jeong, Kakao
>> >> >>  * Jaesang Kim, Kakao
>> >> >>  * Hwansung Yu, Kakao
>> >> >>  * Min-Seok Kim, Kakao
>> >> >>  * Chul Kang, Kakao
>> >> >>
>> >> >> == Sponsors ==
>> >> >>
>> >> >> === Champion ===
>> >> >> Hyunsik Choi
>> >> >>
>> >> >> === Nominated Mentors ===
>> >> >>
>> >> >> === Sponsoring Entity ===
>> >> >>
>> >> >>  * The Apache Incubator
>> >> >>
>> >> >> On Fri, Nov 6, 2015 at 4:05 PM, Hyunsik Choi <hyunsik@apache.org>
>> >> wrote:
>> >> >> > Hi Seetharam,
>> >> >> >
>> >> >> > Thank you for a good question. That seem to be a frequent
question
>> to
>> >> >> > this project.
>> >> >> >
>> >> >> > Here is the answer to your question.
>> >> >> >
>> >> >>
>> >>
>> https://steamshon.gitbooks.io/s2graph-book/content/what_is_different_to_titan.html
>> >> >> >
>> >> >> > I hope that this link is helpful to your understanding.
>> >> >> >
>> >> >> > Best regards,
>> >> >> > Hyunsik
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> > On Fri, Nov 6, 2015 at 3:07 PM, Seetharam Venkatesh
>> >> >> > <venkatesh@innerzeal.com> wrote:
>> >> >> >> Hi Hyunsik,
>> >> >> >>
>> >> >> >> The proposal looks interesting and want to know how is
this
>> different
>> >> >> from
>> >> >> >> existing solutions in the same space such as Titan, etc.
>> >> >> >>
>> >> >> >> Thanks!
>> >> >> >> Venkatesh
>> >> >> >>
>> >> >> >>
>> >> >> >> On Fri, Nov 6, 2015 at 1:36 PM Hyunsik Choi <hyunsik@apache.org>
>> >> wrote:
>> >> >> >>
>> >> >> >>> Hi folks,
>> >> >> >>>
>> >> >> >>> We would like to start a discussion on S2Graph as
an incubation
>> >> >> project.
>> >> >> >>>
>> >> >> >>> S2Graph is a distributed and scalable OLTP graph database
built
>> on
>> >> >> >>> HBase. It provides interactive queries for
>> vertex/edge/sub-graphs on
>> >> >> >>> extremely large graph data sets as well as insertion
and update
>> >> >> >>> operations.
>> >> >> >>>
>> >> >> >>> S2Graph was already introduced in Apache BigData and
HBaseCon
>> this
>> >> >> year.
>> >> >> >>>
>> >> >> >>> The proposal is available at :
>> >> >> >>> https://wiki.apache.org/incubator/S2GraphProposal
>> >> >> >>>
>> >> >> >>> We are looking forward to any feedback. In addition,
we are
>> looking
>> >> >> >>> for volunteers as mentors.
>> >> >> >>>
>> >> >> >>> Best regards,
>> >> >> >>> Hyunsik
>> >> >> >>>
>> >> >> >>>
>> >> ---------------------------------------------------------------------
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>> >> >> >>>
>> >> >> >>>
>> >> >>
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>> >> >>
>> >> >>
>> >> >
>> >> >
>> >> > --
>> >> > Sergio Fernández
>> >> > Partner Technology Manager
>> >> > Redlink GmbH
>> >> > m: +43 6602747925
>> >> > e: sergio.fernandez@redlink.co
>> >> > w: http://redlink.co
>> >>
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