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[HDFS-7165] Separate block metrics for files with replication count 1 - HDFS - [issue]
...We see a lot of escalations because someone has written teragen output with a replication factor of 1, a DN goes down, and a bunch of missing blocks show up. These are normally false positiv...
http://issues.apache.org/jira/browse/HDFS-7165    Author: Andrew Wang, 2014-10-22, 03:39
[expand - 1 more] - Re: HDFS Snapshots - HDFS - [mail # dev]
...Why would the state go backwards? Let me try to restate your scenario:t1: snapshot a file with length 5t2: append to the file, now length 6t3: delete the snapshotAfter this, since we deleted...
   Author: Andrew Wang, 2014-10-21, 15:19
Re: Hadoop Distributed Caching Technology - Hadoop - [mail # dev]
...Hi Deb,We added support for centralized cache management to HDFS, which is out ofthe box and works with MR jobs.See the docs here:http://hadoop.apache.org/docs/r2.5.0/hadoop-project-dist/had...
   Author: Andrew Wang, 2014-10-20, 15:22
[expand - 2 more] - Re: [ANNOUNCE] New Hadoop Committer - Yi Liu - Hadoop - [mail # general]
...Congrats Yi, looking forward to your continued contributions :)On Mon, Oct 20, 2014 at 6:58 AM, Liu, Yi A  wrote: ...
   Author: Andrew Wang, 2014-10-20, 14:50
Re: [DISCUSS] Resolving the divergences for web-related code between branch-2 and trunk - HDFS - [mail # dev]
...This actually is addressed in the compat guidelines, the shell scriptrewrite is incompatible and thus shouldn't land in branch-2. ...
   Author: Andrew Wang, 2014-10-02, 03:10
[expand - 2 more] - Re: [VOTE] Merge HDFS-6581 to trunk - Writing to replicas in memory. - HDFS - [mail # dev]
...-0.The goal of this feature is to improve write performance. I thought it wasthus reasonable for me to ask for write benchmarks. However, this requestwas not received warmly. For a performan...
   Author: Andrew Wang, 2014-09-26, 00:55
[expand - 11 more] - Re: Thinking ahead to hadoop-2.6 - Hadoop - [mail # dev]
...Hey Nicholas,My concern about Archival Storage isn't related to the code quality or thesize of the feature. I think that you and Jing did good work. My concern isthat once we ship, we're loc...
   Author: Andrew Wang, 2014-09-24, 18:37
Re: [VOTE] Merge HDFS-6584 Archival Storage to trunk - HDFS - [mail # dev]
...Hi all,I commented on HDFS-6584 with some feedback. Overall, the design looksreasonable and I think most of it can be addressed after the merge, thoughI'd appreciate a design doc rev and use...
   Author: Andrew Wang, 2014-09-12, 01:18
Re: Standby node from HADOOP-4539 - HDFS - [mail # dev]
...Hi Dmitry,Check out the docs here, our current HA story with QJM should suffice foryour needs:http://hadoop.apache.org/docs/r2.3.0/hadoop-yarn/hadoop-yarn-site/HDFSHighAvailabilityWithNFS.ht...
   Author: Andrew Wang, 2014-09-09, 23:04
[expand - 1 more] - Re: Git repo ready to use - Hadoop - [mail # dev]
...We're still not seeing findbugs results show up on precommit runs. I seethat we're archiving "../patchprocess/*", and Ted thinks that since it'snot in $WORKSPACE it's not getting picked up. ...
   Author: Andrew Wang, 2014-09-08, 22:39
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