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Re: HBase load distribution vs. scan efficiency - HBase - [mail # user]
...The salt byte is a stable hash of the rest of the row key. The system has to remember the total number of buckets, as that's what's used to mod the hash value with. Adding new regions/region...
   Author: James Taylor, 2014-01-21, 04:24
Re: Question on efficient, ordered composite keys - HBase - [mail # user]
...Hi Henning, My favorite implementation of efficient composite row keys is Phoenix. We support composite row keys whose byte representation sorts according to the natural sort order of the va...
   Author: James Taylor, 2014-01-14, 21:01
Re: [VOTE] The 1st hbase 0.94.16 release candidate is available for download - HBase - [mail # dev]
...Thanks, Ted, for compiling against Phoenix.   On Sat, Jan 11, 2014 at 3:15 PM, Ted Yu  wrote:  ...
   Author: James Taylor, 2014-01-12, 00:49
[HBASE-9291] Enable client to setAttribute that is sent once to each region server - HBase - [issue]
...Currently a Scan and Mutation allow the client to set its own attributes that get passed through the RPC layer and are accessible from a coprocessor. This is very handy, but breaks down if t...
http://issues.apache.org/jira/browse/HBASE-9291    Author: James Taylor, 2014-01-07, 19:53
Re: use hbase as distributed crawl's scheduler - HBase - [mail # user]
...Please take a look at our Apache incubator proposal, as I think that may answer your questions: https://wiki.apache.org/incubator/PhoenixProposal   On Fri, Jan 3, 2014 at 11:47 PM, Li L...
   Author: James Taylor, 2014-01-04, 08:12
Re: secondary index feature - HBase - [mail # user]
...No worries, Henning. It's a little deceiving, because the coprocessors that do the index maintenance are invoked on a per region basis. However, the writes/puts that they do for the maintena...
   Author: James Taylor, 2014-01-03, 21:34
[HBASE-10256] Handling of value argument being null for checkAndDelete - HBase - [issue]
...IMO, it would be more useful if when a null is supplied as the value for checkAndDelete, that it add the Delete marker if the row exists rather than if it doesn't exist (i.e. the opposite of...
http://issues.apache.org/jira/browse/HBASE-10256    Author: James Taylor, 2014-01-01, 07:35
[HBASE-10254] Optionally return null when attempting to Increment KeyValue that doesn't exist - HBase - [issue]
...Instead of creating a new KeyValue starting from 0 when an Increment is done on a row that doesn't exist, we should optionally return null. A Get is already being done, so it's easy to detec...
http://issues.apache.org/jira/browse/HBASE-10254    Author: James Taylor, 2013-12-30, 20:42
[HBASE-7362] Scan.setRaw(true) ignores Scan.setTimeRange(minTimestamp,maxTimestamp) - HBase - [issue]
...The following doesn't work as expected:Scan scan = new Scan();scan.setRaw(true);scan.setTimeRange(10,20);scan.setStartRow(new byte[] {1});scan.setStopRow(new byte[] {2});RegionScanner scanne...
http://issues.apache.org/jira/browse/HBASE-7362    Author: James Taylor, 2013-12-27, 20:44
Re: Performance tuning - HBase - [mail # user]
...FYI, scanner caching defaults to 1000 in Phoenix, but as folks have pointed out, that's not relevant in this case b/c only a single row is returned from the server for a COUNT(*) query. &nbs...
   Author: James Taylor, 2013-12-21, 23:30
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