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[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, 2015-04-26, 03:33
[ACCUMULO-981] support pluggable encryption codecs for MapFile when recovering write-ahead logs - Accumulo - [issue]
...As with ACCUMULO-980, we need to support encryption for the recovered write-ahead logs that are stored as MapFiles in HDFS. Those MapFiles need to support low-latency seeks, so aligning the ...
http://issues.apache.org/jira/browse/ACCUMULO-981    Author: Adam Fuchs, 2015-04-17, 18:16
[ACCUMULO-3733] support an ingest path that avoids Mutation objects - Accumulo - [issue]
...I had a thought about a potential performance/API improvement last night. Mutations are great for ensuring that multiple key/value changes to the same row happen atomically, but for some app...
http://issues.apache.org/jira/browse/ACCUMULO-3733    Author: Adam Fuchs, 2015-04-15, 16:28
Re: Unexpected aliasing from RFile getTopValue() - Accumulo - [mail # user]
...On Wed, Apr 15, 2015 at 10:20 AM, Keith Turner  wrote:So, is this a tradeoff in the performance vs. inter-iterator isolationspace? From a performance perspective we would do best if we ...
   Author: Adam Fuchs, 2015-04-15, 15:06
Re: Scan-time iterators returning out-of-order rows - Accumulo - [mail # dev]
...Russ,Sorry for being a bit late to the discussion here. I think it's technicallyfine for scan-time iterators to return keys out of order, but there are afew things you should be aware of:1. ...
   Author: Adam Fuchs, 2015-04-13, 15:26
[ACCUMULO-3712] document setting up VM clusters with high stability - Accumulo - [issue]
...Add documentation in the user manual describing the use of ACCUMULO-3569 and general high stability setup for VM environments....
http://issues.apache.org/jira/browse/ACCUMULO-3712    Author: Adam Fuchs, 2015-04-07, 16:51
Re: Local Combiners to pre-sum at BatchWriter - Accumulo - [mail # user]
...Dylan,Here's an interesting history note: Accumulo used to run some types ofiterators (essentially Combiners before Combiners existed) at the time ofwriting data to the in-memory map. This w...
   Author: Adam Fuchs, 2015-04-06, 16:05
Re: init method being called multiple times of WrappingIterator. - Accumulo - [mail # user]
...A major compaction also might not be a full major compaction, depending onhow it is initiated. It also would be on a single tablet where a scan mightbe over multiple tablets. The implication...
   Author: Adam Fuchs, 2015-04-03, 20:44
[ACCUMULO-3708] datanode blacklist error should be reclassified as a warning - Accumulo - [issue]
...Saw the following exceptions when running a continuous ingest test. The first one is logged as a warning:MinC failed (File /accumulo/tables/1/t-00013pl/F0006irt.rf_tmp could only be replicat...
http://issues.apache.org/jira/browse/ACCUMULO-3708    Author: Adam Fuchs, 2015-04-02, 18:22
Re: [VOTE] Establishing a contrib repo for upgrade testing - Accumulo - [mail # dev]
...+1AdamOn Mar 10, 2015 2:48 AM, "Sean Busbey"  wrote: ...
   Author: Adam Fuchs, 2015-03-10, 14:56
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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