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Re: ColumnPaginationFilter called twice per line? - HBase - [mail # dev]
...Not really - IIRC, ColumnPaginationFilter was broken prior to this fix - it was doing some incorrect version counting and it had to do with the way version tracking and filtering was entangl...
   Author: Varun Sharma, 2013-10-18, 22:15
Re: Regarding QoS for Handlers - HBase - [mail # dev]
...Or a slightly alternative approach would be to have a CallQueue implementation which is more of a priorityQueue.  The Queue wrapper has a number of different queues [TableName:RpcName] ...
   Author: Varun Sharma, 2013-10-13, 20:54
Re: HBase Random Read latency > 100ms - HBase - [mail # user]
...How many reads per second per region server are you throwing at the system - also is 100ms the average latency ?   On Mon, Oct 7, 2013 at 2:04 PM, lars hofhansl  wrote:  ...
   Author: Varun Sharma, 2013-10-08, 19:14
Re: Is there a problem with having 4000 tables in a cluster? - HBase - [mail # user]
...Okay, thanks for the explanation. You can hash or salt (as many people say) the keys to avoid the hot spotting problem. What this means is that you push the part that issues filtered range q...
   Author: Varun Sharma, 2013-09-25, 04:55
[HBASE-7813] Bug in BulkDeleteEndpoint kills entire rows on COLUMN/VERSION Deletes - HBase - [issue]
...Try a BulkDeleteEndpoint using DeleteType.COLUMN or DeleteType.VERSION and give it a set of Columns which are not in the row.A Delete is constructed using just the row alone. No family/colum...
http://issues.apache.org/jira/browse/HBASE-7813    Author: Varun Sharma, 2013-09-20, 06:52
Re: HBase - stable versions - HBase - [mail # dev]
...We, at Pinterest, are also going to stay on 0.94 for a while since it has worked well for us and we don't have the resources to test 0.96 in the EC2 environment. That may change in the futur...
   Author: Varun Sharma, 2013-09-04, 23:29
[HBASE-8434] Allow enabling hbase 8354 to support real lease recovery - HBase - [issue]
...Please see discussion in HBase 8389.For environments where lease recovery time can be bounded on the HDFS side through tight timeouts, provide a toggle for users who want the WAL splitting t...
http://issues.apache.org/jira/browse/HBASE-8434    Author: Varun Sharma, 2013-08-03, 00:20
Re: Excessive .META scans - HBase - [mail # user]
...Just patched 6870 and it immediately fixed the problem !   On Tue, Jul 30, 2013 at 12:57 PM, Stack  wrote:  ...
   Author: Varun Sharma, 2013-08-01, 23:02
Re: HBase read perfomnance and HBase client - HBase - [mail # dev]
...Last time around, we found that block checksums was #1 (but then if we are serving from block cache, it should not matter) and binarysearch into indices was also high in terms of CPU.  ...
   Author: Varun Sharma, 2013-08-01, 06:37
[HBASE-8599] HLogs in ZK are not cleaned up when replication lag is minimal - HBase - [issue]
...On a cluster with very low replication lag (as measured by ageOfLastShippedOp on source), we found HLogs accumulating and not being cleaned up as new WAL(s) are rolled.Each time, we call log...
http://issues.apache.org/jira/browse/HBASE-8599    Author: Varun Sharma, 2013-07-24, 20:08
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