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Re: feature request (count) - HBase - [mail # user]
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...Storing numPuts, numDelets, and maxVersions of each block in the block index could be useful. If a block is all puts, no deletes, and maxVersions=1, then you are more sure of the count...
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Author: Matt Corgan,
2011-06-03, 23:12
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Re: prefix compression - HBase - [mail # dev]
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...What about turning KeyValue into an interface with only the essential getXX() methods? Whatever is using the KeyValue shouldn't *have* to know what sort of structure it's backed by, bu...
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Author: Matt Corgan,
2011-06-03, 03:17
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prefix compression - HBase - [mail # dev]
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...I've been reading up on prefix compression for a few weeks trying to figure out the best approach. Maybe some of you have noticed that 90% of my email s to the user list have something...
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Author: Matt Corgan,
2011-06-02, 22:28
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Re: block index comparator - HBase - [mail # user]
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...I see now. Comparator class is written into the HFile. Got confused because the tests use a ByteArrayComparator even though most HFiles will use KeyComparator (i think...) ...
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Author: Matt Corgan,
2011-05-27, 20:14
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block index comparator - HBase - [mail # user]
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...I was looking at some HFile internals and am confused about the block index comparator. It looks like it uses a simple ByteArrayComparator rather than a KeyComparator. Am I missi...
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Author: Matt Corgan,
2011-05-26, 22:22
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Re: a question storefileIndexSize - HBase - [mail # user]
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...I was thinking it would be a nice feature if each time an hfile was written it kept a count of the raw bytes (before compression) to make it easy to compare to the file size on disk. I...
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Author: Matt Corgan,
2011-05-25, 23:49
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Re: a question storefileIndexSize - HBase - [mail # user]
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...also - how long are your column family name and column qualifiers? they ar e added to each row key in the index, so you want to make them as short as possible On Wed, May 25, 20...
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Author: Matt Corgan,
2011-05-25, 15:09
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Re: a question storefileIndexSize - HBase - [mail # user]
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...I have a table that compresses by 30x using gzip, so the default block size of 64 KB was writing 2 KB blocks to disk. To reduce storefileIndexSize, I raised the block size to 256 KB, p...
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Author: Matt Corgan,
2011-05-25, 14:47
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Re: How to speedup Hbase query throughput - HBase - [mail # user]
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...I think i traced this to a bug in my compaction scheduler that would have missed scheduling about half the regions, hence the 240gb vs 480gb. To confirm: major compaction will always r...
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Author: Matt Corgan,
2011-05-19, 19:41
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Re: How to speedup Hbase query throughput - HBase - [mail # user]
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...that's right On Thu, May 19, 2011 at 8:23 AM, Joey Echeverria wrote: ...
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Author: Matt Corgan,
2011-05-19, 15:35
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