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From Kenneth Knowles <k...@apache.org>
Subject Re: [VOTE] Accept the Iceberg project for incubation
Date Thu, 15 Nov 2018 18:01:41 GMT
+1 (non-binding)

On Thu, Nov 15, 2018 at 9:57 AM Michael Wall <mjwall@apache.org> wrote:

> +1 (binding)
>
> On Thu, Nov 15, 2018 at 3:03 AM Olivier Lamy <olamy@apache.org> wrote:
>
> > +1
> >
> > On Wed, 14 Nov 2018 at 03:07, Ryan Blue <blue@apache.org> wrote:
> >
> > > The discuss thread seems to have reached consensus, so I propose
> > accepting
> > > the Iceberg project for incubation.
> > >
> > > The proposal is copied below and in the wiki:
> > > https://wiki.apache.org/incubator/IcebergProposal
> > >
> > > Please vote on whether to accept Iceberg in the next 72 hours:
> > >
> > > [ ] +1, accept Iceberg for incubation
> > > [ ] -1, reject the Iceberg proposal because . . .
> > >
> > > Thank you for reviewing the proposal and voting,
> > >
> > > rb
> > > ------------------------------
> > > Iceberg Proposal Abstract
> > >
> > > Iceberg is a table format for large, slow-moving tabular data.
> > >
> > > It is designed to improve on the de-facto standard table layout built
> > into
> > > Apache Hive, Presto, and Apache Spark.
> > > Proposal
> > >
> > > The purpose of Iceberg is to provide SQL-like tables that are backed by
> > > large sets of data files. Iceberg is similar to the Hive table layout,
> > the
> > > de-facto standard structure used to track files in a table, but
> provides
> > > additional guarantees and performance optimizations:
> > >
> > >    - Atomicity - Each change to the table is will be complete or will
> > fail.
> > >    “Do or do not. There is no try.”
> > >    - Snapshot isolation - Reads use one and only one snapshot of a
> table
> > at
> > >    some time without holding a lock.
> > >    - Safe schema evolution - A table’s schema can change in
> well-defined
> > >    ways, without breaking older data files.
> > >    - Column projection - An engine may request a subset of the
> available
> > >    columns, including nested fields.
> > >    - Predicate pushdown - An engine can push filters into read planning
> > to
> > >    improve performance using partition data and file-level statistics.
> > >
> > > Iceberg does NOT define a new file format. All data is stored in Apache
> > > Avro, Apache ORC, or Apache Parquet files.
> > >
> > > Additionally, Iceberg is designed to work well when data files are
> stored
> > > in cloud blob stores, even when those systems provide weaker guarantees
> > > than a file system, including:
> > >
> > >    - Eventual consistency in the namespace
> > >    - High latency for directory listings
> > >    - No renames of objects
> > >    - No folder hierarchy
> > >
> > > Rationale
> > >
> > > Initial benchmarks show dramatic improvements in query planning. For
> > > example, in Netflix’s Atlas use case, which stores time-series metrics
> > from
> > > Netflix runtime systems and 1 month is stored across 2.7 million files
> in
> > > 2,688 partitions:
> > >
> > >    - Hive table using Parquet:
> > >       - 400k+ splits, not combined
> > >       - Explain query: 9.6 minutes wall time (planning only)
> > >    - Iceberg table with partition filtering:
> > >       - 15,218 splits, combined
> > >       - Planning: 10 seconds
> > >       - Query wall time: 13 minutes
> > >    - Iceberg table with partition and min/max filtering:
> > >       - 412 splits
> > >       - Planning: 25 seconds
> > >       - Query wall time: 42 seconds
> > >
> > > These performance gains combined with the cross-engine compatibility
> are
> > a
> > > very compelling story.
> > > Initial Goals
> > >
> > > The initial goal will be to move the existing codebase to Apache and
> > > integrate with the Apache development process and infrastructure. A
> > primary
> > > goal of incubation will be to grow and diversify the Iceberg community.
> > We
> > > are well aware that the project community is largely comprised of
> > > individuals from a single company. We aim to change that during
> > incubation.
> > > Current Status
> > >
> > > As previously mentioned, Iceberg is under active development at
> Netflix,
> > > and is being used in processing large volumes of data in Amazon EC2.
> > >
> > > Iceberg license documentation is already based on Apache guidelines for
> > > LICENSE and NOTICE content.
> > > Meritocracy
> > >
> > > We value meritocracy and we understand that it is the basis for an open
> > > community that encourages multiple companies and individuals to
> > contribute
> > > and be invested in the project’s future. We will encourage and monitor
> > > participation and make sure to extend privileges and responsibilities
> to
> > > all contributors.
> > > Community
> > >
> > > Iceberg is currently being used by developers at Netflix and a growing
> > > number of users are actively using it in production environments.
> Iceberg
> > > has received contributions from developers working at Hortonworks,
> > WeWork,
> > > and Palantir. By bringing Iceberg to Apache we aim to assure current
> and
> > > future contributors that the Iceberg community is meritocratic and
> open,
> > in
> > > order to broaden and diversity the user and developer community.
> > > Core Developers
> > >
> > > Iceberg was initially developed at Netflix and is under active
> > development.
> > > We believe Netflix will be of interest to a broad range of users and
> > > developers and that incubating the project at the ASF will help us
> build
> > a
> > > diverse, sustainable community.
> > > Alignment
> > >
> > > Iceberg utilizes other Apache projects such as Avro, Hadoop, Hive, ORC,
> > > Parquet, Pig, and Spark. We anticipate integration with additional
> Apache
> > > projects as the Iceberg community and interest in the project grows.
> > > Known Risks Orphaned Products
> > >
> > > Netflix is committed to the future development of Iceberg and
> understands
> > > that graduation to a TLP, while preferable, is not the only positive
> > > outcome of incubation.
> > >
> > > Should the Iceberg project be accepted by the Incubator, the
> prospective
> > > PPMC would be willing to agree to a target incubation period of 2 years
> > or
> > > less, knowing that every Incubator project incurs a certain cost in
> terms
> > > of ASF infrastructure and volunteer time.
> > > Inexperience with Open Source
> > >
> > > Three of the initial committers are Apache members and Incubator PMC
> > > members. They will work with the other community members to teach them
> > the
> > > Apache Way.
> > > Homogenous Developers
> > >
> > > The majority of the committers work at Netflix, though we are committed
> > to
> > > recruiting and developing additional committers from a wide spectrum of
> > > industries and backgrounds.
> > > Reliance on Salaried Developers
> > >
> > > It is expected that Iceberg development will occur on both salaried
> time
> > > and on volunteer time, after hours. Most of the initial committers are
> > paid
> > > by Netflix to contribute to this project. However, they are all
> > passionate
> > > about the project, and we are both confident and hopeful that the
> project
> > > will continue even if no salaried developers contribute to the project.
> > > Relationships with Other Apache Products
> > >
> > > As mentioned in the Rationale section, Iceberg utilizes a number of
> > > existing Apache projects (Avro, Hadoop, Hive, ORC, Parquet, Pig, &
> > Spark),
> > > and we expect that list to expand as the community grows and
> diversifies.
> > > Any Apache project in the big data space that needs to store or process
> > > tabular data would be potentially relevant.
> > > An Excessive Fascination with the Apache Brand
> > >
> > > We are applying to the Incubator process because we think it is the
> next
> > > logical step for the Iceberg project after open-sourcing the code. This
> > > proposal is not for the purpose of generating publicity. Rather, we
> want
> > to
> > > make sure to create a very inclusive and meritocratic community,
> outside
> > > the umbrella of a single company. Netflix has a long history of
> > > contributing to Apache projects and the Iceberg developers and
> > contributors
> > > understand the implication of making it an Apache project.
> > > Required Resources Mailing lists
> > >
> > >    - dev@iceberg.incubator.apache.org
> > >    - commits@iceberg.incubator.apache.org
> > >    - private@iceberg.incubator.apache.org
> > >
> > > The podling may also create a user mailing list, if needed.
> > > Source Control and Issue Tracking
> > >
> > > The Iceberg podling would use Apache’s gitbox integration to sync
> between
> > > github and Apache infrastructure. The podling would use github issues
> and
> > > pull requests for community engagement.
> > > Current Resources
> > >
> > >    - Initial source: https://github.com/Netflix/iceberg
> > >    - Java documentation:
> > >
> > >
> >
> https://netflix.github.io/iceberg/current/javadoc/index.html?com/netflix/iceberg/package-summary.html
> > >    - Table specification:
> > >
> > >
> >
> https://docs.google.com/document/d/1Q-zL5lSCle6NEEdyfiYsXYzX_Q8Qf0ctMyGBKslOswA/edit
> > >
> > > Source and Intellectual Property Submission Plan
> > >
> > > The Iceberg source code in Github is currently licensed under Apache
> > > License v2.0 and the copyright is assigned to Netflix. If Iceberg
> becomes
> > > an Incubator project at the ASF, Netflix will transfer the source code
> > and
> > > trademark ownership to the Apache Software Foundation via a Software
> > Grant
> > > Agreement.
> > > External Dependencies
> > >
> > > External dependencies licensed under Apache License 2.0
> > >
> > >    - Guava https://github.com/google/guava
> > >    - Jackson https://github.com/FasterXML/jackson-core
> > >    - Joda-Time http://www.joda.org/joda-time/
> > >
> > > External dependencies licensed under the MIT License
> > >
> > >    - SLF4J https://www.slf4j.org/
> > >    - Mockito https://github.com/mockito/mockito
> > >
> > > ASF Projects
> > >
> > >    - Apache Avro
> > >    - Apache Hadoop
> > >    - Apache Hive
> > >    - Apache ORC
> > >    - Apache Parquet
> > >    - Apache Pig
> > >    - Apache Spark
> > >
> > > Cryptography
> > >
> > > We do not expect Iceberg to be a controlled export item due to the use
> of
> > > encryption.
> > > Initial Committers and Affiliations
> > >
> > >    - Ryan Blue blue@apache.org (Netflix)
> > >    - Parth Brahmbhatt parth@apache.org (Netflix)
> > >    - Julien Le Dem julien@apache.org (WeWork)
> > >    - Owen O’Malley omalley@apache.org (Hortonworks)
> > >    - Daniel Weeks dweeks@apache.org (Netflix)
> > >
> > > Sponsors and Nominated Mentors
> > >
> > >    - Champion and mentor: Owen O’Malley omalley@apache.org
> > >    - Mentor: Ryan Blue blue@apache.org
> > >    - Mentor: Julien Le Dem julien@apache.org
> > >
> > > Sponsoring Entity
> > >
> > > The Apache Incubator
> > > --
> > > Ryan Blue
> > >
> >
> >
> > --
> > Olivier Lamy
> > http://twitter.com/olamy | http://linkedin.com/in/olamy
> >
>

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