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Re: regions not balance? - HBase - [mail # user]
...bq. and return true, but It not worksLooking at master log, do you see balancer related logs around this time ?If there was region in transition at this moment, balancer wouldn't performbala...
   Author: Ted Yu, 2014-06-17, 03:41
Re: how to calculate all the number of store file on hbase all table ? - HBase - [mail # user]
...Please also note the following method in HRegionFileSystem (available in0.98+):  public Collection getStoreFiles(final byte[] familyName)throws IOException {CheersOn Mon, Jun 16, 2...
   Author: Ted Yu, 2014-06-16, 16:20
Re: what different between delete and deleteall in hbase shell? - HBase - [mail # user]
...Please take a look at section 3 in:http://learnhbase.wordpress.com/2013/03/02/hbase-shell-commands/CheersOn Jun 16, 2014, at 12:21 AM, ch huang  wrote: ...
   Author: Ted Yu, 2014-06-16, 08:08
Re: what difference between hdfs balance and hbase balance operation? - HBase - [mail # user]
...Hdfs balance spreads hdfs data uniformly across datanodes in the cluster. Hbase balancer tries to spread regions evenly across region servers in hbase cluster. Custom load balancer can co-lo...
   Author: Ted Yu, 2014-06-16, 08:03
Re: RegexStringComparator problem: Why pattern "u" has the same result as ".*u.*" ? - HBase - [mail # user]
...You can pass a subclass of RegexStringComparator to SingleColumnValueFilter.This subclass can use matches() to suit your needs.RegexStringComparator has been in 0.94 release for so long, its...
2 emails [+ more]    Author: Ted Yu, 2014-06-16, 04:07
Re: Does compression ever improve performance? - HBase - [mail # user]
...Data block encoding enables block cache to hold more entries, therebylifting performance.You can find coverage of data block encoding in this wiki as well:https://blogs.apache.org/hbase/Chee...
2 emails [+ more]    Author: Ted Yu, 2014-06-15, 22:47
Re: if/when zookeeper goes down, how to recover? - HBase - [mail # user]
...Cycling old bits:http://search-hadoop.com/m/WsPol11E4ss1/Zookeeper+ec2&subj=Best+practices+for+using+zookeeper+in+an+Amazon+EC2+environmentOn Jun 14, 2014, at 2:10 PM, S Ahmed  wrote:&n...
2 emails [+ more]    Author: Ted Yu, 2014-06-14, 21:57
[HBASE-11309] Remove USE_POSITION_BEFORE and related code from PrefixTreeSeeker - HBase - [issue]
...This constant is always false in PrefixTreeSeeker.We can remove this variable and the code depending on this boolean to be true.Thanks to Matt Corgan who confirmed the above....
http://issues.apache.org/jira/browse/HBASE-11309    Author: Ted Yu, 2014-06-14, 21:30
Re: master caught a ClosedChannelException - HBase - [mail # user]
...The exception means an attempt is made to invoke or complete an I/Ooperation upon channel that is closed.The ip's in log snippets were different. Have you checked server logs onthose machine...
   Author: Ted Yu, 2014-06-14, 14:28
Re: HFile V2 vs HFile V3 - HBase - [mail # user]
...w.r.t. columnar format, there were discussions in the past:https://issues.apache.org/jira/browse/HBASE-5313?focusedCommentId=13203324&page=com.atlassian.jira.plugin.system.issuetabpanels:com...
2 emails [+ more]    Author: Ted Yu, 2014-06-13, 15:42
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