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[expand - 8 more] - Re: Why is this region compacting? - HBase - [mail # user]
...I tried the workaround, and it is working very well. The number of store files for all regions is now sane (went from about 8000 total store files to 1000), and scans are now much more effic...
   Author: Tom Brown, 2013-09-24, 20:27
[expand - 1 more] - Re: How to manage retry failures in the HBase client - HBase - [mail # user]
...I had read that section for those values, but it was unclear (the hbase.client.retries.number description subtly switches to describe hbase.client.pause, and I missed that context switch). &...
   Author: Tom Brown, 2013-09-17, 17:48
Re: Eliminating duplicate values - HBase - [mail # user]
...If you're doing comparisons to remove duplicates, I'm not sure if you'd get any benefit to doing the de-duplication at compaction time.   If you de-duplicate at write time, the same num...
   Author: Tom Brown, 2013-03-03, 15:48
Re: hbase corruption - missing region files in HDFS - HBase - [mail # user]
...Chris,  I really appreciate your detailed fix description!  I've run into similar problems (due to old hardware and bad sectors) and could never figure out how to fix a broken tabl...
   Author: Tom Brown, 2012-12-10, 18:07
Re: lookup table - HBase - [mail # user]
...If there are 9k possible entries in the lookup table, in order to achieve space savings, the keys will need to be 1 or 2 bytes. For simplicity, let's say you go with the 2 byte version. For ...
   Author: Tom Brown, 2012-09-17, 01:57
[expand - 1 more] - Re: Performance of scan setTimeRange VS manually doing it - HBase - [mail # user]
...It seems like the the internal logic for handling a time range is two part: First, as you said, each file contains the minimum and maximum timestamps contained within. This provides a very r...
   Author: Tom Brown, 2012-09-12, 22:42
[expand - 2 more] - Re: Tracking down coprocessor pauses - HBase - [mail # user]
...I have captured some logs from what is happening during one of these pauses.  http://pastebin.com/K162Einz  Can someone help me figure out what's actually going on from these logs?...
   Author: Tom Brown, 2012-09-12, 17:40
Re: Key formats and very low cardinality leading fields - HBase - [mail # user]
...I suspect the hashed data will have a more uniform distribution among all possible ranges, whereas structured data will likely fall into ranges according to a bell curve (even though it has ...
   Author: Tom Brown, 2012-09-07, 03:05
Re: sorting by value - HBase - [mail # user]
...We do numerical sorting within some of our tables.  We put the numerical values as fixed length byte arrays within the keys (and flipped the sign bit so negative values are lexigraphica...
   Author: Tom Brown, 2012-08-31, 06:12
[expand - 1 more] - Re: MemStore and prefix encoding - HBase - [mail # user]
...Lars,  I have been relying on the expected behavior (if I write another cell with the same {key, family, qualifier, version} it won't return the previous one) so you're answer was confu...
   Author: Tom Brown, 2012-08-27, 16:20
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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