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[expand - 1 more] - RE: Design review: Secondary index support through coprocess - HBase - [mail # dev]
...Deadlocks are possible because  cross region RPCs create cyclic dependencies in HBase cluster.  RS1-> RS2->RS3->RS1, where -> is PRC call  now imagine that last ca...
   Author: Vladimir Rodionov, 2014-01-22, 17:06
[expand - 1 more] - RE: HBase load distribution vs. scan efficiency - HBase - [mail # user]
...Ted, how does it differ from row key salting?  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: [EMAIL PROTECTED]  ________________...
   Author: Vladimir Rodionov, 2014-01-20, 04:56
[expand - 7 more] - Re: HBase 0.94.15: writes stalls periodically even under moderate steady load (AWS EC2) - HBase - [mail # dev]
...I just started ycsb on our real cluster:   ./bin/ycsb load hbase -P workloads/load20m -p columnfamily=family -s -threads 100 -target 15000  This is beginning of a ycsb log on real ...
   Author: Vladimir Rodionov, 2014-01-17, 18:33
[expand - 1 more] - Re: Rebuild HBASE Table to reduce Regions per RS - HBase - [mail # user]
...Nice. Ted. Is there any reason why we can't do it online?   On Tue, Jan 14, 2014 at 10:47 AM, Ted Yu  wrote:  ...
   Author: Vladimir Rodionov, 2014-01-14, 19:00
Re: RC for 0.94.16 - HBase - [mail # dev]
...I am glad, that this serious issue, which has been brought to community attention last summer, finally  got resolved.  Thanks, Lars .   On Wed, Jan 8, 2014 at 3:50 PM, lars ho...
   Author: Vladimir Rodionov, 2014-01-09, 00:51
[expand - 1 more] - RE: Hbase Performance Issue - HBase - [mail # user]
...I think in this case, writing data to HDFS or HFile directly (for subsequent bulk loading) is the best option. HBase will never compete in write speed with HDFS.  Best regards, Vladimir...
   Author: Vladimir Rodionov, 2014-01-05, 01:12
RE: Performance between HBaseClient scan and HFileReaderV2 - HBase - [mail # user]
...HBase scanner MUST guarantee correct order of KeyValues (coming from different HFile's), filter condition+ filter condition on included column families and qualifiers, time range, max versio...
   Author: Vladimir Rodionov, 2014-01-02, 18:30
RE: Consistent Backup strategy - HBase - [mail # user]
...Offline snapshots?  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: [EMAIL PROTECTED]  ________________________________________ Fr...
   Author: Vladimir Rodionov, 2013-12-23, 19:02
RE: Performance tuning - HBase - [mail # user]
...You will get better overall performance by increasing # of regions (salt buckets)  With 23 x 32 cpu I would try 300 regions at least.  Best regards, Vladimir Rodionov Principal Pla...
   Author: Vladimir Rodionov, 2013-12-22, 00:07
[expand - 1 more] - RE: 3-Hour Periodic Network/CPU/Disk/Latency Spikes - HBase - [mail # user]
...Available HBase API allows to compact table's regions independently. It can be cron job, script or client application which connects to HBase cluster, selects regions and trigger compaction,...
   Author: Vladimir Rodionov, 2013-12-14, 00:53
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB