+1 On Mon, Jan 14, 2019 at 9:38 AM Felix Cheung <felixche...@apache.org> wrote:
> +1 > > > On Mon, Jan 14, 2019 at 3:20 AM Suneel Marthi > <suneel_mar...@yahoo.com.invalid> wrote: > > > +1 > > > > Sent from my iPhone > > > > > On Jan 13, 2019, at 5:34 PM, Thomas Weise <t...@apache.org> wrote: > > > > > > Hi all, > > > > > > Following the discussion of the Hudi proposal in [1], this is a vote > > > on accepting Hudi into the Apache Incubator, > > > per the ASF policy [2] and voting rules [3]. > > > > > > A vote for accepting a new Apache Incubator podling is a > > > majority vote. Everyone is welcome to vote, only > > > Incubator PMC member votes are binding. > > > > > > This vote will run for at least 72 hours. Please VOTE as > > > follows: > > > > > > [ ] +1 Accept Hudi into the Apache Incubator > > > [ ] +0 Abstain > > > [ ] -1 Do not accept Hudi into the Apache Incubator because ... > > > > > > The proposal is included below, but you can also access it on > > > the wiki [4]. > > > > > > Thanks for reviewing and voting, > > > Thomas > > > > > > [1] > > > > > > https://lists.apache.org/thread.html/12e2bdaa095d68dae6f8731e473d3d43885783177d1b7e3ff2f65b6d@%3Cgeneral.incubator.apache.org%3E > > > > > > [2] > > > > > > https://incubator.apache.org/policy/incubation.html#approval_of_proposal_by_sponsor > > > > > > [3] http://www.apache.org/foundation/voting.html > > > > > > [4] https://wiki.apache.org/incubator/HudiProposal > > > > > > > > > > > > = Hudi Proposal = > > > > > > == Abstract == > > > > > > Hudi is a big-data storage library, that provides atomic upserts and > > > incremental data streams. > > > > > > Hudi manages data stored in Apache Hadoop and other API compatible > > > distributed file systems/cloud stores. > > > > > > == Proposal == > > > > > > Hudi provides the ability to atomically upsert datasets with new values > > in > > > near-real time, making data available quickly to existing query engines > > > like Apache Hive, Apache Spark, & Presto. Additionally, Hudi provides a > > > sequence of changes to a dataset from a given point-in-time to enable > > > incremental data pipelines that yield greater efficiency & latency than > > > their typical batch counterparts. By carefully managing number of > files & > > > sizes, Hudi greatly aids both query engines (e.g: always providing > > > well-sized files) and underlying storage (e.g: HDFS NameNode memory > > > consumption). > > > > > > Hudi is largely implemented as an Apache Spark library that > reads/writes > > > data from/to Hadoop compatible filesystem. SQL queries on Hudi datasets > > are > > > supported via specialized Apache Hadoop input formats, that understand > > > Hudi’s storage layout. Currently, Hudi manages datasets using a > > combination > > > of Apache Parquet & Apache Avro file/serialization formats. > > > > > > == Background == > > > > > > Apache Hadoop distributed filesystem (HDFS) & other compatible cloud > > > storage systems (e.g: Amazon S3, Google Cloud, Microsoft Azure) serve > as > > > longer term analytical storage for thousands of organizations. Typical > > > analytical datasets are built by reading data from a source (e.g: > > upstream > > > databases, messaging buses, or other datasets), transforming the data, > > > writing results back to storage, & making it available for analytical > > > queries--all of this typically accomplished in batch jobs which operate > > in > > > a bulk fashion on partitions of datasets. Such a style of processing > > > typically incurs large delays in making data available to queries as > well > > > as lot of complexity in carefully partitioning datasets to guarantee > > > latency SLAs. > > > > > > The need for fresher/faster analytics has increased enormously in the > > past > > > few years, as evidenced by the popularity of Stream processing systems > > like > > > Apache Spark, Apache Flink, and messaging systems like Apache Kafka. By > > > using updateable state store to incrementally compute & instantly > reflect > > > new results to queries and using a “tailable” messaging bus to publish > > > these results to other downstream jobs, such systems employ a different > > > approach to building analytical dataset. Even though this approach > yields > > > low latency, the amount of data managed in such real-time data-marts is > > > typically limited in comparison to the aforementioned longer term > storage > > > options. As a result, the overall data architecture has become more > > complex > > > with more moving parts and specialized systems, leading to duplication > of > > > data and a strain on usability. > > > > > > Hudi takes a hybrid approach. Instead of moving vast amounts of batch > > data > > > to streaming systems, we simply add the streaming primitives (upserts & > > > incremental consumption) onto existing batch processing technologies. > We > > > believe that by adding some missing blocks to an existing Hadoop stack, > > we > > > are able to a provide similar capabilities right on top of Hadoop at a > > > reduced cost and with an increased efficiency, greatly simplifying the > > > overall architecture in the process. > > > > > > Hudi was originally developed at Uber (original name “Hoodie”) to > address > > > such broad inefficiencies in ingest & ETL & ML pipelines across Uber’s > > data > > > ecosystem that required the upsert & incremental consumption primitives > > > supported by Hudi. > > > > > > == Rationale == > > > > > > We truly believe the capabilities supported by Hudi would be > increasingly > > > useful for big-data ecosystems, as data volumes & need for faster data > > > continue to increase. A detailed description of target use-cases can be > > > found at https://uber.github.io/hudi/use_cases.html. > > > > > > Given our reliance on so many great Apache projects, we believe that > the > > > Apache way of open source community driven development will enable us > to > > > evolve Hudi in collaboration with a diverse set of contributors who can > > > bring new ideas into the project. > > > > > > == Initial Goals == > > > > > > * Move the existing codebase, website, documentation, and mailing lists > > to > > > an Apache-hosted infrastructure. > > > * Integrate with the Apache development process. > > > * Ensure all dependencies are compliant with Apache License version > 2.0. > > > * Incrementally develop and release per Apache guidelines. > > > > > > == Current Status == > > > > > > Hudi is a stable project used in production at Uber since 2016 and was > > open > > > sourced under the Apache License, Version 2.0 in 2017. At Uber, Hudi > > > manages 4000+ tables holding several petabytes, bringing our Hadoop > > > warehouse from several hours of data delays to under 30 minutes, over > the > > > past two years. The source code is currently hosted at github.com ( > > > https://github.com/uber/hudi ), which will seed the Apache git > > repository. > > > > > > === Meritocracy === > > > > > > We are fully committed to open, transparent, & meritocratic > interactions > > > with our community. In fact, one of the primary motivations for us to > > enter > > > the incubation process is to be able to rely on Apache best practices > > that > > > can ensure meritocracy. This will eventually help incorporate the best > > > ideas back into the project & enable contributors to continue investing > > > their time in the project. Current guidelines ( > > > https://uber.github.io/hudi/community.html#becoming-a-committer) have > > > already put in place a meritocratic process which we will replace with > > > Apache guidelines during incubation. > > > > > > === Community === > > > > > > Hudi community is fairly young, since the project was open sourced only > > in > > > early 2017. Currently, Hudi has committers from Uber & Snowflake. We > > have a > > > vibrant set of contributors (~46 members in our slack channel) > including > > > Shopify, DoubleVerify and Vungle & others, who have either submitted > > > patches or filed issues with hudi pipelines either in early production > or > > > testing stages. Our primary goal during the incubation would be to grow > > the > > > community and groom our existing active contributors into committers. > > > > > > === Core Developers === > > > > > > Current core developers work at Uber & Snowflake. We are confident that > > > incubation will help us grow a diverse community in a open & > > collaborative > > > way. > > > > > > === Alignment === > > > > > > Hudi is designed as a general purpose analytical storage abstraction > that > > > integrates with multiple Apache projects: Apache Spark, Apache Hive, > > Apache > > > Hadoop. It was built using multiple Apache projects, including Apache > > > Parquet and Apache Avro, that support near-real time analytics right on > > top > > > of existing Apache Hadoop data lakes. Our sincere hope is that being a > > part > > > of the Apache foundation would enable us to drive the future of the > > project > > > in alignment with the other Apache projects for the benefit of > thousands > > of > > > organizations that already leverage these projects. > > > > > > == Known Risks == > > > > > > === Orphaned products === > > > > > > The risk of abandonment of Hudi is low. It is used in production at > Uber > > > for petabytes of data and other companies (mentioned in community > > section) > > > are either evaluating or in the early stage for production use. Uber is > > > committed to further development of the project and invest resources > > > towards the Apache processes & building the community, during > incubation > > > period. > > > > > > === Inexperience with Open Source === > > > > > > Even though the initial committers are new to the Apache world, some > have > > > considerable open source experience - Vinoth Chandar (Linkedin > voldemort, > > > Chromium), Prasanna Rajaperumal (Cloudera experience), Zeeshan Qureshi > > > (Chromium) & Balaji Varadarajan (Linkedin Databus). We have been > > > successfully managing the current open source community answering > > questions > > > and taking feedback already. Moreover, we hope to obtain guidance and > > > mentorship from current ASF members to help us succeed with the > > incubation. > > > > > > === Length of Incubation === > > > > > > We expect the project be in incubation for 2 years or less. > > > > > > === Homogenous Developers === > > > > > > Currently, the lead developers for Hudi are from Uber. However, we have > > an > > > active set of early contributors/collaborators from Shopify, > DoubleVerify > > > and Vungle, that we hope will increase the diversity going forward. > Once > > > again, a primary motivation for incubation is to facilitate this in the > > > Apache way. > > > > > > === Reliance on Salaried Developers === > > > > > > Both the current committers & early contributors have several years of > > core > > > expertise around data systems. Current committers are very passionate > > about > > > the project and have already invested hundreds of hours towards > helping & > > > building the community. Thus, even with employer changes, we expect > they > > > will be able to actively engage in the project either because they will > > be > > > working in similar areas even with newer employers or out of belief in > > the > > > project. > > > > > > === Relationships with Other Apache Products === > > > > > > To the best of our knowledge, there are no direct competing projects > with > > > Hudi that offer all of the feature set namely - upserts, incremental > > > streams, efficient storage/file management, snapshot > isolation/rollbacks > > - > > > in a coherent way. However, some projects share common goals and > > technical > > > elements and we will highlight them here. Hive ACID/Kudu both offer > > upsert > > > capabilities without storage management/incremental streams. The recent > > > Iceberg project offers similar snapshot isolation/rollbacks, but not > > > upserts or other data plane features. A detailed comparison with their > > > trade-offs can be found at https://uber.github.io/hudi/comparison.html > . > > > > > > We are committed to open collaboration with such Apache projects and > > > incorporate changes to Hudi or contribute patches to other projects, > with > > > the goal of making it easier for the community at large, to adopt these > > > open source technologies. > > > > > > === Excessive Fascination with the Apache Brand === > > > > > > This proposal is not for the purpose of generating publicity. We have > > > already been doing talks/meetups independently that have helped us > build > > > our community. We are drawn towards Apache as a potential way of > ensuring > > > that our open source community management is successful early on so > hudi > > > can evolve into a broadly accepted--and used--method of managing data > on > > > Hadoop. > > > > > > == Documentation == > > > [1] Detailed documentation can be found at > https://uber.github.io/hudi/ > > > > > > == Initial Source == > > > > > > The codebase is currently hosted on Github: > https://github.com/uber/hudi > > . > > > During incubation, the codebase will be migrated to an Apache > > > infrastructure. The source code already has an Apache 2.0 licensed. > > > > > > == Source and Intellectual Property Submission Plan == > > > > > > Current code is Apache 2.0 licensed and the copyright is assigned to > > Uber. > > > If the project enters incubator, Uber will transfer the source code & > > > trademark ownership to ASF via a Software Grant Agreement > > > > > > == External Dependencies == > > > > > > Non apache dependencies are listed below > > > > > > * JCommander (1.48) Apache-2.0 > > > * Kryo (4.0.0) BSD-2-Clause > > > * Kryo (2.21) BSD-3-Clause > > > * Jackson-annotations (2.6.4) Apache-2.0 > > > * Jackson-annotations (2.6.5) Apache-2.0 > > > * jackson-databind (2.6.4) Apache-2.0 > > > * jackson-databind (2.6.5) Apache-2.0 > > > * Jackson datatype: Guava (2.9.4) Apache-2.0 > > > * docker-java (3.1.0-rc-3) Apache-2.0 > > > * Guava: Google Core Libraries for Java (20.0) Apache-2.0 > > > * bijection-avro (0.9.2) Apache-2.0 > > > * com.twitter.common:objectsize (0.0.12) Apache-2.0 > > > * Ascii Table (0.2.5) Apache-2.0 > > > * config (3.0.0) Apache-2.0 > > > * utils (3.0.0) Apache-2.0 > > > * kafka-avro-serializer (3.0.0) Apache-2.0 > > > * kafka-schema-registry-client (3.0.0) Apache-2.0 > > > * Metrics Core (3.1.1) Apache-2.0 > > > * Graphite Integration for Metrics (3.1.1) Apache-2.0 > > > * Joda-Time (2.9.6) Apache-2.0 > > > * JUnit CPL-1.0 > > > * Awaitility (3.1.2) Apache-2.0 > > > * jersey-connectors-apache (2.17) GPL-2.0-only CDDL-1.0 > > > * jersey-container-servlet-core (2.17) GPL-2.0-only CDDL-1.0 > > > * jersey-core-server (2.17) GPL-2.0-only CDDL-1.0 > > > * htrace-core (3.0.4) Apache-2.0 > > > * Mockito (1.10.19) MIT > > > * scalatest (3.0.1) Apache-2.0 > > > * Spring Shell (1.2.0.RELEASE) Apache-2.0 > > > > > > All of them are Apache compatible > > > > > > == Cryptography == > > > > > > No cryptographic libraries used > > > > > > == Required Resources == > > > > > > === Mailing lists === > > > > > > * priv...@hudi.incubator.apache.org (with moderated subscriptions) > > > * d...@hudi.incubator.apache.org > > > * comm...@hudi.incubator.apache.org > > > * u...@hudi.incubator.apache.org > > > > > > === Git Repositories === > > > > > > Git is the preferred source control system: git:// > > > git.apache.org/incubator-hudi > > > > > > === Issue Tracking === > > > > > > We prefer to use the Apache gitbox integration to sync Github & Apache > > > infrastructure, and rely on Github issues & pull requests for community > > > engagement. If this is not possible, then we prefer JIRA: Hudi (HUDI) > > > > > > == Initial Committers == > > > > > > * Vinoth Chandar (vinoth at uber dot com) (Uber) > > > * Nishith Agarwal (nagarwal at uber dot com) (Uber) > > > * Balaji Varadarajan (varadarb at uber dot com) (Uber) > > > * Prasanna Rajaperumal (prasanna dot raj at gmail dot com) (Snowflake) > > > * Zeeshan Qureshi (zeeshan dot qureshi at shopify dot com) (Shopify) > > > * Anbu Cheeralan (alunarbeach at gmail dot com) (DoubleVerify) > > > > > > == Sponsors == > > > > > > === Champion === > > > Julien Le Dem (julien at apache dot org) > > > > > > === Nominated Mentors === > > > > > > * Luciano Resende (lresende at apache dot org) > > > * Thomas Weise (thw at apache dot org > > > * Kishore Gopalakrishna (kishoreg at apache dot org) > > > * Suneel Marthi (smarthi at apache dot org) > > > > > > === Sponsoring Entity === > > > > > > The Incubator PMC > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: general-unsubscr...@incubator.apache.org > > For additional commands, e-mail: general-h...@incubator.apache.org > > > > >
