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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
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
Coprocessor runs longer than timeout, and thread safety - HBase - [mail # user]
...I have a custom co-processor endpoint that handles aggregation of various statistics for each region (the stats from all regions are then merged together for the final result). Sometimes the...
   Author: Tom Brown, 2012-08-24, 22:27
Re: Need to fast-forward a scanner inside a coprocessor - HBase - [mail # user]
...So I understand I'll need to upgrade to 0.94 (which won't be a problem because the releases are binary-compatible).  I see that the RegionScanner interface contains the new method "rese...
   Author: Tom Brown, 2012-08-04, 00:47
Re: Parallel scans - HBase - [mail # user]
...I think you could do it manually by looking up all the different regions and starting a separate scan for each region. Not quite as handy as the built-in multi get, but essentially the same....
   Author: Tom Brown, 2012-07-31, 19:27
Re: Query a version of a column efficiently - HBase - [mail # user]
...Somebody will correct me if I'm wrong, but I think that for your example, you should use setTimeRange(0, 5) and setMaxVersion(1).  It's my understanding that those settings will give yo...
   Author: Tom Brown, 2012-07-26, 22:05
Re: When node is down - HBase - [mail # user]
...Can it notice the node is down sooner? If that node is serving an active region (or if it's a datanode for an active region), that would be a potentially large amount of downtime.  With...
   Author: Tom Brown, 2012-06-22, 13:41
Re: Collation order of items - HBase - [mail # user]
...Storing the bytes as native UTF-16 or UTF-32 will not help.  Even strings in UTF-8 format can be sorted by their code points when stored as bytes.  Unfortunately, that's not really...
   Author: Tom Brown, 2012-06-08, 17:34
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