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[HBASE-7319] Extend Cell usage through read path - HBase - [issue]
...Umbrella issue for eliminating Cell copying.The Cell interface allows us to work with a reference to underlying bytes in the block cache without copying each Cell into consecutive bytes in a...
http://issues.apache.org/jira/browse/HBASE-7319    Author: Matt Corgan, 2014-04-10, 08:12
[HBASE-7323] add Cell interface to SeekerState and BufferedEncodedSeeker - HBase - [issue]
...SeekerState is the staging site for a Cell while it is being assembled by the BufferedEncodedSeeker.  When the parent StoreFileScanner calls getCurrentCell() it's guaranteed that the Ce...
http://issues.apache.org/jira/browse/HBASE-7323    Author: Matt Corgan, 2014-04-08, 12:46
[expand - 1 more] - Re: Why doesn't KeyValue.equals/CellComparator compare the values? - HBase - [mail # dev]
...Hmm, I don't think KeyValue.hashCode should be including the value.  I'msurprised it hasn't turned up a bug, but maybe that's because there'sbarely any code relying on it.  Looks l...
   Author: Matt Corgan, 2014-03-01, 23:30
[HBASE-4676] Prefix Compression - Trie data block encoding - HBase - [issue]
...The HBase data block format has room for 2 significant improvements for applications that have high block cache hit ratios.  First, there is no prefix compression, and the current KeyVa...
http://issues.apache.org/jira/browse/HBASE-4676    Author: Matt Corgan, 2013-11-13, 19:51
Re: Beware of PREFIX_TREE block encoding - HBase - [mail # dev]
...Prefix-tree benefits when you have data with long keys and short values and you're doing many small gets or multi-gets.  Like Lars said, it can also expand the effective size of your bl...
   Author: Matt Corgan, 2013-10-21, 22:01
Re: Data types stage 1 is ready for reivew - HBase - [mail # dev]
...Looks great to me.  Without the strict dependencies on hadoop or hbase it'll be easy to pull into its own standalone module or new project if there's demand.   On Thu, Aug 1, 2013 ...
   Author: Matt Corgan, 2013-08-02, 03:57
[HBASE-5479] Postpone CompactionSelection to compaction execution time - HBase - [issue]
...It can be commonplace for regionservers to develop long compaction queues, meaning a CompactionRequest may execute hours after it was created.  The CompactionRequest holds a CompactionS...
http://issues.apache.org/jira/browse/HBASE-5479    Author: Matt Corgan, 2013-07-09, 23:04
Re: Efficiently wiping out random data? - HBase - [mail # dev]
...Would it be possible to zero-out all the value bytes for cells in existing HFiles?  They keys would remain, but if you knew that ahead of time you could design your keys so they don't c...
   Author: Matt Corgan, 2013-06-19, 21:15
Re: Poor HBase map-reduce scan performance - HBase - [mail # user]
...Not that it's a long-term solution, but try major-compacting before running the benchmark.  If the LSM tree is CPU bound in merging HFiles/KeyValues through the PriorityQueue, then redu...
   Author: Matt Corgan, 2013-05-01, 06:52
[expand - 1 more] - Re: Cell Encoders and usage of Cell - HBase - [mail # dev]
...I'm not 100% clear what you're asking Nick.  My understanding is that Cell and KeyValue are identical with regards to the timestamp.  Timestamp is part of the identity of the Cell/...
   Author: Matt Corgan, 2013-04-22, 00:36
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