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[expand - 5 more] - Re: Beware of PREFIX_TREE block encoding - HBase - [mail # dev]
...FAST_DIFF: Time to read all 1.3M rows reported in ms.  encoding  = NONE,                scanner = StoreScanner;      time = 3...
   Author: Vladimir Rodionov, 2013-10-20, 17:06
RE: Block cache hit ratio question - HBase - [mail # user]
...HBase block cache does not expose any statistics on a per-table basis. This looks like a nice to have feature in a next releases. If your load is mostly random reads, than several factors af...
   Author: Vladimir Rodionov, 2013-10-19, 00:04
RE: CDH4.4 and HBASE-8912 issue - HBase - [mail # user]
...Boris, what does hbck say?  We have had this issue a couple times before. To fix it I had to stop the cluster, run offline meta repair tool, delete zk-store on each zk quorum node Offli...
   Author: Vladimir Rodionov, 2013-10-17, 20:01
[expand - 2 more] - RE: HBase load problems - HBase - [mail # user]
...Sure, if you can do this - do this. Its the only way to reduce compaction significantly but downside is increased complexity in data store maintenance, but its usual: something to loose - so...
   Author: Vladimir Rodionov, 2013-10-17, 18:34
[expand - 6 more] - Re: Scanner with explicit columns list is very slow - HBase - [mail # dev]
...https://issues.apache.org/jira/browse/HBASE-9769   On Tue, Oct 15, 2013 at 11:19 AM, Vladimir Rodionov wrote:  ...
   Author: Vladimir Rodionov, 2013-10-15, 18:32
RE: Limiting the number of regions per RS - HBase - [mail # user]
...You can write your own balancer and disable standard one: hbase.balancer.period = LONG.MAX_VALUE  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.c...
   Author: Vladimir Rodionov, 2013-10-14, 19:24
Excessive filtering in RegionScannerImpl - HBase - [mail # dev]
...I may be be do not understand fully the overall design of a scanner system in HBase but it looks like we do double filtering on KVs during scan operation. First time in StoreScanner.next (se...
   Author: Vladimir Rodionov, 2013-10-12, 18:25
[expand - 3 more] - Re: skipKVsNewerThanReadpoint in StoreFileScanner and MemStoreScanner - HBase - [mail # dev]
...Created https://issues.apache.org/jira/browse/HBASE-9751.   On Fri, Oct 11, 2013 at 8:55 PM, lars hofhansl  wrote:  ...
   Author: Vladimir Rodionov, 2013-10-12, 04:42
[expand - 4 more] - RE: Coprocessor Increments - HBase - [mail # user]
...Because he is trying to update *row* in a different Region (and potentially in different RS).  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com ...
   Author: Vladimir Rodionov, 2013-10-11, 17:26
[expand - 7 more] - RE: HBase Random Read latency > 100ms - HBase - [mail # user]
...I can't say for SCR. There is a possibility that the feature is broken, of course. But the fact that hbase.regionserver.checksum.verify does not affect performance means that OS caches effec...
   Author: Vladimir Rodionov, 2013-10-09, 17:59
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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