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[HBASE-8403] Allow column family to be declared as containing only fixed length KeyValues to improve scan performance - HBase - [issue]
...HBase scan performance could be improved in cases where a column family is known to have only fixed length KeyValues (and perhaps in addition non nullable). A custom block encoding could lev...
http://issues.apache.org/jira/browse/HBASE-8403    Author: James Taylor, 2013-04-23, 19:43
Re: Speeding up the row count - HBase - [mail # user]
...Phoenix will parallelize within a region:  SELECT count(1) FROM orders  I agree with Ted, though, even serially, 100,000 rows shouldn't take any where near 6 mins. You say > 100...
   Author: James Taylor, 2013-04-19, 15:59
[expand - 3 more] - Re: Essential column family performance - HBase - [mail # user]
...Good idea, Sergey. We'll rerun with larger non essential column family  values and see if there's a crossover point. One other difference for us  is that we're using FAST_DIFF enco...
   Author: James Taylor, 2013-04-09, 01:53
Re: Best way to query multiple sets of rows - HBase - [mail # user]
...Hi Greame, Are you familiar with Phoenix (https://github.com/forcedotcom/phoenix),  a SQL skin over HBase? We've just introduced a new feature (still in the  master branch) that'll...
   Author: James Taylor, 2013-04-08, 18:39
[expand - 1 more] - Re: Does compatibility between versions also mean binary compatibility? - HBase - [mail # dev]
...That seems reasonable to make an exception for coprocessors on binary  compatibility. Can this be explicitly documented if it's not already so  folks are sure to know that?   ...
   Author: James Taylor, 2013-04-06, 20:11
[expand - 4 more] - Re: HBase Types: Explicit Null Support - HBase - [mail # dev]
...With Phoenix, variable width types may be null in all cases (in the row  key or as key values) and fixed width types may be null as key values or  as the last row key column. We on...
   Author: James Taylor, 2013-04-05, 02:18
Re: 0.94.6.1 please have a look - HBase - [mail # dev]
...+1 from the Phoenix team. We installed and tested on our internal  cluster and everything looks good.       James  On 04/04/2013 01:33 PM, lars hofhansl wrote:...
   Author: James Taylor, 2013-04-04, 21:40
[HBASE-6919] Remove unnecessary cast from Bytes.readVLong - HBase - [issue]
...Remove the throws IOException so that caller doesn't have to catch and ignore.  public static long readVLong(final byte [] buffer, final int offset)  throws IOExceptionAl...
http://issues.apache.org/jira/browse/HBASE-6919    Author: James Taylor, 2013-04-03, 07:15
Re: Understanding scan behaviour - HBase - [mail # user]
...Mohith, Are you wanting to reduce the amount of data you're scanning and bring  down your query time when: - you have a row key has a multi-part row key of a string and time value and -...
   Author: James Taylor, 2013-03-29, 07:44
[HBASE-8197] Cannot distinguish between HBase default config value and client overridden config value - HBase - [issue]
...By HBase setting default values in hbase-default.xml, it makes it difficult for a platform to know if a value has been overridden by the client. For example, Phoenix has a default value it w...
http://issues.apache.org/jira/browse/HBASE-8197    Author: James Taylor, 2013-03-28, 00:09
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