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[ACCUMULO-759] remove priority setting for scan-time iterators - Accumulo - [issue]
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...Iterators have a priority setting that allows a user to order iterators arbitrarily. However that priority is an integer that doesn't directly convey the iterator's relationship to other ite...
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http://issues.apache.org/jira/browse/ACCUMULO-759
Author: Adam Fuchs,
2013-04-04, 04:04
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[ACCUMULO-416] reevaluate limiting the number of open files given HDFS improvements - Accumulo - [issue]
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...Tablet servers limit the number of files that can be opened for scans and for major compactions. The two main reasons for this limit was to reduce our impact on HDFS, primarily regarding con...
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http://issues.apache.org/jira/browse/ACCUMULO-416
Author: Adam Fuchs,
2013-03-25, 21:51
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[ACCUMULO-981] support pluggable encryption codecs for MapFile when recovering write-ahead logs - Accumulo - [issue]
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...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 ...
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http://issues.apache.org/jira/browse/ACCUMULO-981
Author: Adam Fuchs,
2013-03-12, 20:09
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[ACCUMULO-980] support pluggable codecs for RFile - Accumulo - [issue]
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...As part of the encryption at rest story, RFile should support pluggable modules where it currently has hardcoded options for compression codecs. This is a natural place to add encryption cap...
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http://issues.apache.org/jira/browse/ACCUMULO-980
Author: Adam Fuchs,
2013-03-06, 16:36
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[ACCUMULO-954] ZooLock watcher can stop watching - Accumulo - [issue]
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...Basically, this will result in tablet servers failing to recognize when they lose their locks. I think the worst that can happen with this is a tablet server can fail to die after it loses i...
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http://issues.apache.org/jira/browse/ACCUMULO-954
Author: Adam Fuchs,
2013-03-04, 20:13
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Re: Determining the cause of a tablet server failure - Accumulo - [mail # user]
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...So, question for the community: inside bin/accumulo we have: -XX:OnOutOfMemoryError="kill -9 %p" Should this also append a log message? Something like: -XX:OnOutOfMemoryError="...
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Author: Adam Fuchs,
2013-02-27, 20:27
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Re: Determining the cause of a tablet server failure - Accumulo - [mail # user]
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...There are a few primary reasons why your tablet server would die: 1. Lost lock in Zookeeper. If the tablet server and zookeeper can't communicate with each other then the lock will timeout a...
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Author: Adam Fuchs,
2013-02-27, 17:24
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Re: Suggestions on modeling a composite row key - Accumulo - [mail # user]
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...At sqrrl, we tend to use a Tuple class that implements List (List would also work), and has conversions to and from ByteBuffer. To encode the tuple into a byte buffer, change all the "\1"s t...
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Author: Adam Fuchs,
2013-02-27, 15:44
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[ACCUMULO-1082] InMemoryMapTest fails on some platforms - Accumulo - [issue]
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...I get a sporadic test failure with InMemoryMapTest with a quad core macbook pro, running TRUNK as of just after the 1.5 branching. Not sure if this is more of a test of Accumulo or of the pl...
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http://issues.apache.org/jira/browse/ACCUMULO-1082
Author: Adam Fuchs,
2013-02-22, 02:28
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[ACCUMULO-519] support in-memory compactions - Accumulo - [issue]
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...There are several factors that influence how big to make the in-memory write buffer (tserver.memory.maps.max) for Accumulo. Two dominant factors that conflict with each other are: Overall di...
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http://issues.apache.org/jira/browse/ACCUMULO-519
Author: Adam Fuchs,
2013-02-13, 19:52
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