I just merged the feature branch into trunk. Look for [SBN read] prefix in commits. Thank you everybody for working on this.
--Konstantin On Fri, Dec 21, 2018 at 6:34 PM Brahma Reddy Battula < brahmareddy.batt...@huawei.com> wrote: > My late +1. Really it's useful feature.. Great work. > > -----Original Message----- > From: Konstantin Shvachko [mailto:shv.had...@gmail.com] > Sent: Saturday, December 22, 2018 6:48 AM > To: Hadoop Common <common-...@hadoop.apache.org>; hdfs-dev < > hdfs-...@hadoop.apache.org> > Cc: mapreduce-dev@hadoop.apache.org; yarn-...@hadoop.apache.org > Subject: [Result] [VOTE - 2] Merge HDFS-12943 branch to trunk - Consistent > Reads from Standby > > Obviously +1 from me. > > With four binding +1s, two non-binding +1s, and no -1s this vote passes. > Thank you folks for working on the feature and for voting. > Will do the merge in bit. > > Thanks, > --Konst > > On Fri, Dec 14, 2018 at 6:16 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 > > >
