hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Suresh Srinivas <sur...@hortonworks.com>
Subject Re: [VOTE] Merge HDFS-5535 Rolling Upgrade Improvement
Date Tue, 25 Feb 2014 21:52:47 GMT
+1 for merging the feature to trunk.

Main goal of HDFS-3225 was rolling upgrade. I have resolved it, given the
umbrella jira addresses it.

On Tue, Feb 25, 2014 at 1:41 PM, Tsz Wo Sze <szetszwo@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


NOTICE: This message is intended for the use of the individual or entity to 
which it is addressed and may contain information that is confidential, 
privileged and exempt from disclosure under applicable law. If the reader 
of this message is not the intended recipient, you are hereby notified that 
any printing, copying, dissemination, distribution, disclosure or 
forwarding of this communication is strictly prohibited. If you have 
received this communication in error, please contact the sender immediately 
and delete it from your system. Thank You.

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message