No. The default max parallelism of 128 will be applied. If you try to restore above that value, the restore will fail and you can simply restore at a smaller value.
No data loss. On Mon, Dec 20, 2021 at 2:28 AM 杨浩 <yangha...@163.com> wrote: > > Thanks for your replay. If we don't set the max parallelism, and we change > the parallelism to a very big num, will the state loss? > > > > > > At 2021-11-27 01:20:49, "Yun Tang" <tang...@apache.org> wrote: > >Hi Yang, > > > >Flink keeps the max key groups the same no matter how parallelism changes, > >and use this to avoid state data lost [1] > > > >[1] https://flink.apache.org/features/2017/07/04/flink-rescalable-state.html > > > > > >Best > >Yun Tang > > > >On 2021/11/26 10:07:29 Nicolaus Weidner wrote: > >> Hi, > >> > >> to rescale, you should take a savepoint, stop the job, then restart from > >> the savepoint with your new desired parallelism. This way, no data will be > >> lost. > >> > >> Best, > >> Nico > >> > >> On Thu, Nov 25, 2021 at 10:53 AM 杨浩 <yangha...@163.com> wrote: > >> > >> > Will Flink loss some old Keyed State when changing the parallelism, like > >> > 2 > >> > -> 5, or 5->3? > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > > > >
