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[ACCUMULO-3269] nondeterministic failure of MiniAccumuloClusterStartStopTest - Accumulo - [issue]
...When building in master (mvn package -P assemble) I got the following error. Ran the build again (also mvn package -P assemble, with no clean inbetween) and the whole build succeeded.Running...
http://issues.apache.org/jira/browse/ACCUMULO-3269    Author: Adam Fuchs, 2014-11-16, 16:56
[expand - 2 more] - Re: comparing different rfile "densities" - Accumulo - [mail # user]
...Jeff,I also suspect that this is reaching the point of over-optimization.While there are some situations in which contiguous tablets will belikely to be co-hosted on the same tserver, this i...
   Author: Adam Fuchs, 2014-11-13, 15:13
[ACCUMULO-3303] funky performance with large WAL - Accumulo - [issue]
...The tserver seems to get into a funky state when writing to a large write-ahead log. I ran some continuous ingest tests varying tserver.walog.max.size in {512M, 1G, 2G, 4G, 8G} and got ...
http://issues.apache.org/jira/browse/ACCUMULO-3303    Author: Adam Fuchs, 2014-11-07, 22:47
[ACCUMULO-3300] monitor ingest, query, etc. rates are too smooth - Accumulo - [issue]
...We use an exponential decay function to smooth performance monitoring. This dates back to the early days of the project when we were taking samples frequently and everything looked like nois...
http://issues.apache.org/jira/browse/ACCUMULO-3300    Author: Adam Fuchs, 2014-11-05, 22:24
[ACCUMULO-3272] tserver breaks in a bad way when it can't write to hdfs trash - Accumulo - [issue]
...When installing and testing a vanilla install of HDP 2.1 the HDFS setting for fs.trash.interval is set to 360 by default. Accumulo takes this to mean that it should move deleted files to the...
http://issues.apache.org/jira/browse/ACCUMULO-3272    Author: Adam Fuchs, 2014-10-30, 15:25
[ACCUMULO-1083] add concurrency to HDFS write-ahead log - Accumulo - [issue]
...When running tablet servers on beefy nodes (lots of disks), the write-ahead log can be a serious bottleneck. Today we ran a continuous ingest test of 1.5-SNAPSHOT on an 8-node (plus a master...
http://issues.apache.org/jira/browse/ACCUMULO-1083    Author: Adam Fuchs, 2014-10-21, 20:10
[expand - 2 more] - Re: Deprecation removal for 1.7.0 - Accumulo - [mail # dev]
...What's the right level of review? Should we have a public announcementboard of some sort on the website, or is a request for comment on theuser list sufficient?On Wed, Oct 8, 2014 at 5:35 PM...
   Author: Adam Fuchs, 2014-10-08, 22:55
Re: C++ accumulo client --> native clients for Python, Go, Ruby etc - Accumulo - [mail # dev]
...John,Do you have any performance numbers that you can share around your useof the existing proxy solution? One of the reasons that Thrift isperformant for Accumulo is that messages are batch...
   Author: Adam Fuchs, 2014-10-08, 18:04
Re: Remotely Accumulo - Accumulo - [mail # user]
...Accumulo tservers typically listen on a single interface. If you have aserver with multiple interfaces (e.g. loopback and eth0), you might have aproblem in which the tablet servers are not l...
   Author: Adam Fuchs, 2014-10-07, 02:26
Re: Determining tablets assigned to table splits, and the number of rows in each tablet - Accumulo - [mail # user]
...A few years ago we hashed out a rough idea of creating a stats APIthat would allow users to ask a variety of questions that leverageinformation that is already present in the system. Those q...
   Author: Adam Fuchs, 2014-10-06, 14:31
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB