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Re: WAL - rate limiting factor x4.67 - Accumulo - [mail # user]
...One thing you can do is reduce the replication factor for the WAL. We have found that makes a pretty significant different in write performance. That can be modified with the tserver.wal.rep...
   Author: Adam Fuchs, 2013-12-04, 14:55
[ACCUMULO-1244] commons-io version conflict with CDH4 - Accumulo - [issue]
...CDH4 appears to rely on commons-io version 2.0 or greater. Accumulo currently packages in version 1.4. We should bump this up to achieve compatibility.Workaround: put the hadoop dependency l...
http://issues.apache.org/jira/browse/ACCUMULO-1244    Author: Adam Fuchs, 2013-11-26, 15:47
[ACCUMULO-233] rfile rename failure can lead to unavailability - Accumulo - [issue]
...During a minor compaction, a rename from *.rf_tmp to *.rf fails. This would be OK, except that we left a reference to *.rf in the !METADATA table. We need to make sure that if any part of th...
http://issues.apache.org/jira/browse/ACCUMULO-233    Author: Adam Fuchs, 2013-11-21, 21:09
[ACCUMULO-1915] seeking backwards with a combiner can give keys out of range - Accumulo - [issue]
...topKey in the combiner class is not always cleared on a seek, so a subsequent seek can end up returning the previously returned key....
http://issues.apache.org/jira/browse/ACCUMULO-1915    Author: Adam Fuchs, 2013-11-21, 16:10
Re: "Provided" dependencies - Accumulo - [mail # dev]
...On Nov 6, 2013 6:04 PM, "Joey Echeverria"  wrote:  We currently leak the Text object. It would be great if we didn't! (newbie project?)   We have done some crazy reflection st...
   Author: Adam Fuchs, 2013-11-07, 02:04
[ACCUMULO-1847] number of compactor threads can increase dynamically but not decrease - Accumulo - [issue]
...This is related to ACCUMULO-401. I can increase the number of threads in the major compaction pool by setting the tserver.compaction.major.concurrent.max variable via the Accumulo shell, but...
http://issues.apache.org/jira/browse/ACCUMULO-1847    Author: Adam Fuchs, 2013-11-02, 16:31
[ACCUMULO-1777] encryption configuration should not depend on AccumuloConfiguration.getSiteConfiguration() - Accumulo - [issue]
...In order to configure RFile to encrypt, it is necessary to have an accumulo-site.xml on the classpath that holds the encryption parameters. This is less than convenient in the case that we w...
http://issues.apache.org/jira/browse/ACCUMULO-1777    Author: Adam Fuchs, 2013-10-15, 15:27
[ACCUMULO-1755] BatchWriter blocks all addMutation calls while binning mutations - Accumulo - [issue]
...Through code inspection, we found that the BatchWriter bins mutations inside of a synchronized block that covers calls to addMutation. Binning potentially involves lookups of tablet metadata...
http://issues.apache.org/jira/browse/ACCUMULO-1755    Author: Adam Fuchs, 2013-10-07, 21:35
[ACCUMULO-1754] support scale-up behavior in BatchWriter - Accumulo - [issue]
...The o.a.a.client.impl.TabletServerBatchWriter currently limits write threads to one per server. Some people want to use Accumulo on beefy servers where sending one batch at a time is a bottl...
http://issues.apache.org/jira/browse/ACCUMULO-1754    Author: Adam Fuchs, 2013-10-07, 21:28
[ACCUMULO-1753] evaluate options for optimizing a SortedKeyValueIterator-like API on the client side - Accumulo - [issue]
...Currently, there is a significant performance difference between running something like the IntersectingIterator in the TabletServer vs. in the ClientSideIteratorScanner, even on a single no...
http://issues.apache.org/jira/browse/ACCUMULO-1753    Author: Adam Fuchs, 2013-10-07, 15:45
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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