+1 non-binding
Best Regards! --------------------- Luke Han On Tue, Nov 24, 2015 at 8:53 AM, Hyunsik Choi <hyun...@apache.org> wrote: > Hello folks, > > Thanks for all the feedback on the S2Graph Proposal. > > I would like to call for a [VOTE] on S2Graph joining the ASF as an > incubation project. > > The vote is open for at least 72 hours: > > [ ] +1 accept S2Graph in the Incubator > [ ] ±0 > [ ] -1 (please give reason) > > S2Graph provides a scalable distributed graph database engine over a > key/value store such as HBase. S2Graph provides a fully asynchronous > API to manipulate data as a property graph model and fast > breadth-first-search queries over the graph. S2Graph is designed for > OLTP-like workloads on graph data sets instead of batch processing, > and it also provides INSERT/UPDATE operations on them. > > The proposal is available on the wiki here: > https://wiki.apache.org/incubator/S2GraphProposal > > Best regards, > Hyunsik > > > <COPY of the proposal wiki> > > ------------------------------------------------------------------------------------------------ > = S2Graph Proposal = > > == Abstract == > S2Graph is a distributed and scalable OLTP graph database built on > Apache HBase to support fast traversal of extremely large graphs. > > == Proposal == > S2Graph provides a scalable distributed graph database engine over a > key/value store such as HBase. S2Graph provides a fully asynchronous > API to manipulate data as a property graph model and fast > breadth-first-search queries over the graph. S2Graph is designed for > OLTP-like workloads on graph data sets instead of batch processing. > Also, S2Graph provides INSERT/UPDATE operations. Its name 'S2Graph' is > an abbreviated word of '''S'''uper '''S'''imple '''Graph''' Database. > > 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 > > == Background == > S2Graph initially started as an internal project at Kakao.com to > efficiently store user relations and user activities as one large > graph and to provide a unified query interface to traverse the graph. > It was open sourced on Github about a 3 months ago in June 2015. > > Over time, S2Graph using HBase as the storage tier has begun by > adapted into various applications, such as messaging, social feeds, > and realtime recommendations at Kakao. > > Users can benefit by using S2Graph`s generalized high level graph > abstraction API instead of querying via low-level key/value APIs, just > as Apache Phoenix provides a 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, a graph model is more > intuitive and efficient than tabular formats (RDBMS). > > There are many ASF projects that provide SQL tiers, but there is no > ASF projects that provide a scalable graph layer on top of the > existing hadoop ecosystem. When graph data grows to the trillion edge > scale, the process of traversing takes a long time and can be costly. > However, with the benefit of HBase`s scalable architecture, S2Graph > can traverse large graphs in a breadth-first-search manner > efficiently. > > S2Graph also interoperates with several existing Apache projects > (HBase, Apache Spark) to provide means of merging real time events and > batch processed data using the property graph data model. > > Many developers run their own domain specific API servers to serve > their data products, but a graph model is general and the S2Graph API > fully supports traversal of the graph, so it can be used as a scalable > general purpose API serving layer for various domains. As long as data > can be modeled as graph, then users can avoid tedious work developing > customized API servers if they use 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 API with no current plans to > extend beyond these bounds. > > S2Graph complements this with a higher level API for a property graph > model. > > S2Graph was designed to offer a scalable distributed graph database > skin over HBase from the beginning in order to provide a property > graph model and breadth first search, and will continue to focus on > providing the 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 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 contributing 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 HBase and > Apache 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 a 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, S2Graph has the following external > dependencies: > * Asynchbase (BSD) > * Play Framework (Apache 2.0 license) > * Scala (http://www.scala-lang.org/license.html) > * Spark (Apache 2.0 license) > * Kafka (Apache 2.0 license) > > == Required Resources == > > === Mailing list === > > We will migrate our mailing lists to the following: > * us...@s2graph.incubator.apache.org > * d...@s2graph.incubator.apache.org > * priv...@s2graph.incubator.apache.org > * comm...@s2graph.incubator.apache.org > > === Source control === > > The S2Graph team would like to use Git for source code 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 dot com> > * Daewon Jeong <blueiur at gmail dot com> > * Jaesang Kim <honeysleep at gmail dot com> > * Hwansung Yu <deejayfwan at gmail dot com> > * Min-Seok Kim <mskim.org at gmail dot com> > * Chul Kang <miralchul at gmail dot com> > * Luke Han <lukehan at apache dot org> > * Alexander Bezzubov <bzz at apache dot org> > > == Affiliations == > > * Doyung Yoon, Kakao > * Daewon Jeong, Kakao > * Jaesang Kim, Kakao > * Hwansung Yu, Kakao > * Min-Seok Kim, Kakao > * Chul Kang, Kakao, > * Luke Han, Ebay Inc. > * Alexander Bezzubov, NFLabs > > == Sponsors == > > === Champion === > Hyunsik Choi > > === Nominated Mentors === > * Andrew Purtell - Apache Member, Salesforce > * Sergio Fernández - Apache Member, Redlink > * Hyunsik Choi - Apache Member, Gruter Inc. > * Seetharam Venkatesh - IPMC, Hortonworks Inc. > > === Sponsoring Entity === > > * The Apache Incubator > > --------------------------------------------------------------------- > To unsubscribe, e-mail: general-unsubscr...@incubator.apache.org > For additional commands, e-mail: general-h...@incubator.apache.org > >
