+1 (no-binding) At Uber we've deployed a subset of features covered in this JIRA in production at multiple data centers, and it's being running great for a while now. We are seeing huge benefits in terms of scaling our NameNode throughput and providing better SLA guarantees for applications such as Presto. We are very much looking forward to try out the full features once this is merged into trunk.
Chao On Tue, Dec 18, 2018 at 5:29 PM Jonathan Hung <jyhung2...@gmail.com> wrote: > +1! > > Jonathan Hung > > > On Sat, Dec 15, 2018 at 8:26 AM Zhe Zhang <z...@apache.org> wrote: > > > +1 > > > > Thanks for addressing concerns from the previous vote. > > > > On Fri, Dec 14, 2018 at 6:24 PM Konstantin Shvachko < > shv.had...@gmail.com> > > wrote: > > > > > Hi Hadoop developers, > > > > > > I would like to propose to merge to trunk the feature branch HDFS-12943 > > for > > > Consistent Reads from Standby Node. The feature is intended to scale > read > > > RPC workloads. On large clusters reads comprise 95% of all RPCs to the > > > NameNode. We should be able to accommodate higher overall RPC workloads > > (up > > > to 4x by some estimates) by adding multiple ObserverNodes. > > > > > > The main functionality has been implemented see sub-tasks of > HDFS-12943. > > > We followed up with the test plan. Testing was done on two independent > > > clusters (see HDFS-14058 and HDFS-14059) with security enabled. > > > We ran standard HDFS commands, MR jobs, admin commands including manual > > > failover. > > > We know of one cluster running this feature in production. > > > > > > Since the previous vote we addressed Daryn's concern (see HDFS-13873), > > > added documentation for the new feature, and fixed a few other jiras. > > > > > > I attached a unified patch to the umbrella jira for the review. > > > Please vote on this thread. The vote will run for 7 days until Wed Dec > > 21. > > > > > > Thanks, > > > --Konstantin > > > > > -- > > Zhe Zhang > > Apache Hadoop Committer > > http://zhe-thoughts.github.io/about/ | @oldcap > > >
