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[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
Re: Accumulo Powered By Logo - Accumulo - [mail # dev]
...I like the one with just the 'a', but I think we could make ~50% bigger.AdamOn Thu, Oct 2, 2014 at 3:58 PM, Billie Rinaldi  wrote: ...
   Author: Adam Fuchs, 2014-10-02, 20:02
[expand - 1 more] - Re: Compaction slowing queries - Accumulo - [mail # user]
...You can change compression codecs at any time on a per-table basis. Thisonly affects how new files are written. Existing files will still be readthe same way. See the table.file.compress.typ...
   Author: Adam Fuchs, 2014-09-11, 17:25
[ACCUMULO-3079] improve system iterator performance by collapsing call stack - Accumulo - [issue]
...System iterators are at the core of the tightest loops in Accumulo, handling every key/value pair that traverses through a scan or a compaction. In many cases, iterators are the current perf...
http://issues.apache.org/jira/browse/ACCUMULO-3079    Author: Adam Fuchs, 2014-09-02, 20:58
[ACCUMULO-3088] StatsIterator readCounter could be more accurate - Accumulo - [issue]
...When testing seek performance I noticed that the read count displayed on Accumulo's monitor page registered zero entries read per second and a positive number of entries per second returned....
http://issues.apache.org/jira/browse/ACCUMULO-3088    Author: Adam Fuchs, 2014-08-28, 15:19
[ACCUMULO-3067] scan performance degrades after compaction - Accumulo - [issue]
...I've been running some scan performance tests on 1.6.0, and I'm running into an interesting situation in which query performance starts at a certain level and then degrades by ~15% after an ...
http://issues.apache.org/jira/browse/ACCUMULO-3067    Author: Adam Fuchs, 2014-08-21, 20:51
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