Just checking in to see how we feel about Spark 3.1 now. We support 5 different Spark versions at this point: 3.1, 3.2, 3.3, 3.4 and 3.5. Any thoughts on making Iceberg 1.4 the last release with Spark 3.1?
On 2023/04/27 04:58:06 Walaa Eldin Moustafa wrote: > Yes, that sounds like a good compromise. Initially I was looking at > deprecation guidelines in [1], but I see you are referring to [2]. > > [1] https://iceberg.apache.org/contribute/ > [2] > https://iceberg.apache.org/multi-engine-support/#current-engine-version-lifecycle-status > > On Wed, Apr 26, 2023 at 8:10 AM Anton Okolnychyi > <aokolnyc...@apple.com.invalid> wrote: > > > Got it. Given that quite a bit of folks still use 3.1, I don’t think we > > would remove it unless the branch becomes inactive. Marking it as > > deprecated would allow us to indicate that it may not be as up-to-date and > > complete as other versions and some performance enhancements or even minor > > bug fixes may not be there. That would solve one of the concerns I raised > > earlier. We should discourage users from onboarding new use cases on 3.1. > > > > I believe our doc summarizes the message pretty well. > > > > > > 1. *Deprecated*: an engine version is no longer actively maintained. > > People who are still interested in the version can backport any necessary > > feature or bug fix from newer versions, but the community will not spend > > effort in achieving feature parity. Iceberg recommends users to move > > towards a newer version. Contributions to a deprecated version is > > expected > > to diminish over time, so that eventually no change is added to a > > deprecated version. > > > > > > https://iceberg.apache.org/multi-engine-support/#current-engine-version-lifecycle-status > > > > Let me know if that seems like a good compromise. > > > > - Anton > > > > > > On Apr 25, 2023, at 8:01 PM, Walaa Eldin Moustafa <wa.moust...@gmail.com> > > wrote: > > > > To elaborate on LinkedIn's use case: > > > > * LinkedIn maintains its own fork, but we would like to keep it as close > > to upstream as possible. > > * +1 to Manu on migrations in large companies could take well beyond 18 > > months, and it is unlikely to migrate/upgrade more frequently. > > * One important use case for the Spark 3.1 module is not necessarily > > fixing issues in the module itself, but fixing issues in other core > > modules, and having a release that contains core fixes as well as Spark 3.1. > > * That said, in the last 6 months, there have been 29 commits to Spark 3.1 > > module, 50 commits to Spark 3.2 module, and 90 to Spark 3.3, in the Iceberg > > master branch. It seems that Spark 3.1 is reasonably active. > > > > What does marking as deprecated entail in terms of deleting the code? > > Would the guideline be to use 3.2 or 3.3 as an alternative? > > > > Thanks, > > Walaa. > > > > > > > > On Tue, Apr 25, 2023 at 12:08 PM Anton Okolnychyi < > > aokolnyc...@apple.com.invalid> wrote: > > > >> Ok, seems like we are in agreement to deprecate 3.1. I’ll fire a PR > >> shortly. > >> > >> Does anyone want to go through changes in 3.3 and 3.2 and find what we > >> missed to cherry-pick so that we have that list in one place (e.g. create > >> an issue)? > >> > >> Any thoughts on how to mark changes as candidates for cherry-picking? > >> Creating an issue? > >> > >> - Anton > >> > >> On Apr 24, 2023, at 10:01 AM, Edgar Rodriguez < > >> edgar.rodrig...@airbnb.com.INVALID> wrote: > >> > >> Hi all, > >> > >> Thanks for the discussion. Similarly to Manu, we're in Spark 3.1.1 and > >> Iceberg 1.1.0 - we backport Spark 3.1.1 fixes internally as well. It's a > >> bit more complicated to move fast on Spark versions internally, mainly due > >> to the number of scala customers that we have. > >> > >> I understand maintaining yet another Spark version is burdensome so > >> I'm +1 on marking 3.1 deprecated, and I'd be happy to contribute on > >> backports if needed on a community maintained branch, we'd just need to tag > >> changes that may need a backport. > >> > >> Cheers, > >> > >> On Sun, Apr 23, 2023 at 4:40 PM Ryan Blue <b...@tabular.io> wrote: > >> > >>> Thank you for stepping up and offering to help, Manu. I'm glad that > >>> you're willing to help with backports. > >>> > >>> On Sun, Apr 23, 2023 at 2:05 AM Manu Zhang <owenzhang1...@gmail.com> > >>> wrote: > >>> > >>>> You would just end up backporting twice. > >>>> > >>>> > >>>> That's why I said a community maintained branch benefits us, saving one > >>>> backport. Note the first backport is more difficult, sometimes requiring > >>>> rewriting the PR since there would be API differences between Spark > >>>> versions. > >>>> The second backport will be much easier if we focus on bug fixes. > >>>> Meanwhile, it's also easier for us to upgrade to Iceberg 1.2+ if 3.1 > >>>> support is still available although deprecated. > >>>> > >>>> > >>> > >>> -- > >>> Ryan Blue > >>> Tabular > >>> > >> > >> > >> -- > >> Edgar R > >> > >> > >> > > >
