+1 On Tue, Dec 21, 2021 at 3:23 PM Matteo Merli <mme...@apache.org> wrote:
> This is the voting thread for PIP-119. It will stay open for at least 48h. > > https://github.com/apache/pulsar/issues/13305 > > ----------- > > ## Motivation > > The consistent hashing implementation to uniformly assign keys to consumers > in the context of a KeyShared subscription, was introduced in > https://github.com/apache/pulsar/pull/6791, which was released in Pulsar > 2.6.0. > > While consistent hashing can use slightly more memory in certain cases, it > is > more suitable as a general default implementation, as it leads to a fairer > distribution of keys across consumers, and avoiding corner cases that > depend > on the sequence of addition/removal of consumers. > > ## Proposed changes > > In 2.10 release, for the setting: > > ```properties > # On KeyShared subscriptions, with default AUTO_SPLIT mode, use > splitting ranges or > # consistent hashing to reassign keys to new consumers > subscriptionKeySharedUseConsistentHashing=false > ``` > > Change its default value to `true`. > > The `AUTO_SPLIT` mode will not be removed nor deprecated. Users will still > be > able to use the old implementation. > > -- > Matteo Merli > <mme...@apache.org> >
