+1
> On Feb 25, 2014, at 3:42 PM, "Tsz Wo Sze" <szets...@yahoo.com> wrote: > > Hi hdfs-dev, > > We propose merging the HDFS-5535 branch to trunk. > > HDFS Rolling Upgrade is a feature to allow upgrading individual HDFS daemons. > In Hadoop v2, HDFS supports highly-available (HA) namenode services and wire > compatibility. These two capabilities make it feasible to upgrade HDFS > without incurring HDFS downtime. We make such improvement in the HDFS-5535 > branch. > > The HDFS-5535 branch is ready to be merged to trunk. As this being written, > there are 48 subtasks in HDFS-5535; 44 subtasks are already completed. The > core developments including feature development, unit tests and user doc, are > already done. The merge patch posted a few ago already passed Jenkins. I > will post a updated patch to trigger Jenkins again for the latest code base. > > The remaining JIRAs are: > > HDFS-3225: Revist upgrade snapshots, roll back, finalize to enable rolling > upgrades (assigned to Sanjay) > HDFS-6000: Avoid saving namespace when starting rolling upgrade (assigned to > Jing) > HDFS-6013: add rollingUpgrade information to latest UI (assigned to Vinay) > HDFS-6016: Update datanode replacement policy to make writes more robust > (assigned to Kihwal) > > HDFS-6000 will be committed soon. All other issues are further improvements > which can be done after merge. > > The other remaining works are: > - Revise the design doc > - Post a test plan (Haohui is working on it.) > - Execute the manual tests (Haohui and Fengdong will work on it.) > > The work was a collective effort of Nathan Roberts, Sanjay Radia, Suresh > Srinivas, Kihwal Lee, Jing Zhao, Arpit Agarwal, Brandon Li, Haohui Mai, > Vinayakumar B, Fengdong Yu, Chris Nauroth and Tsz-Wo Nicholas Sze, who have > proposed the design, worked on the code, reviewed patches, tested the > features and authored documentation. We thank everyone that who has gave us > valuable comments and feedback on the feature. > > The vote runs for 7 days. Here is my +1 on the merge. > > Thanks. > Tsz-Wo
