+1 PengHui Li <peng...@apache.org> 于2021年12月22日周三 19:33写道：
> +1 > > Penghui > > On Wed, Dec 22, 2021 at 7:49 AM Matteo Merli <mme...@apache.org> wrote: > > > This is the voting thread for PIP-117. It will stay open for at least > 48h. > > > > https://github.com/apache/pulsar/issues/13302 > > > > ---- > > > > ## Motivation > > > > Pulsar standalone is the "Pulsar in a box" version of a Pulsar cluster, > > where > > all the components are started within the context of a single JVM > process. > > > > Users are using the standalone as a way to get quickly started with > Pulsar > > or > > in all the cases where it makes sense to have a single node deployment. > > > > Right now, the standalone is starting by default with many components, > > several of > > which are quite complex, since they are designed to be deployed in a > > distributed > > fashion. > > > > ## Goal > > > > Simplify the components of Pulsar standalone to achieve: > > > > 1. Reduce complexity > > 2. Reduce startup time > > 3. Reduce memory and CPU footprint of running standalone > > > > ## Proposed changes > > > > The proposal here is to change some of the default implementations that > are > > used for the Pulsar standalone. > > > > 1. **Metadata Store implementation** --> > > Change from ZooKeeper to RocksDB > > > > 2. **Pulsar functions package backend** --> > > Change from using DistributedLog to using local filesystem, storing > > the > > jars directly in the data folder instead of uploading them into BK. > > > > 3. **Pulsar functions state store implementation** --> > > Change the state store to be backed by a MetadataStore based > backed, > > with the RocksDB implementation. > > > > 4. **Table Service** --> > > Do not start BK table service by default > > > > ## Compatibility considerations > > > > In order to avoid compatibility issues where users have existing Pulsar > > standalone services that they want to upgrade without conflicts, we will > > follow the principle of keeping the old defaults where there is existing > > data on the disk. > > > > We will add a file, serving the purpose as a flag, in the > `data/standalone` > > directory, for example `new-2.10-defaults`. > > > > If the file is present, or if the data directory is completely missing, > we > > will adopt the new set of default configuration settings. > > > > If the file is not there, we will continue to use existing defaults and > we > > will > > not break the upgrade operation. > > > > > > -- > > Matteo Merli > > <mme...@apache.org> > > >
