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[HBASE-9769] Improve performance of a Scanner with explicit column list when rows are small/medium size - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-9769    Author: Vladimir Rodionov, 2013-10-29, 03:33
RE: Linear Scalability in HBase - HBase - [mail # user]
...You can not saturate region server with one client (unless you probably use hbase-async) if all data is cached in RAM. In our performance tests we have run 10 clients (on different hosts) wi...
   Author: Vladimir Rodionov, 2013-10-25, 18:21
RE: Add Columnsize Filter for Scan Operation - HBase - [mail # user]
...Using HBase client API (scanners) for M/R is so oldish :). HFile has well defined format and it is much more efficient to read them directly.  Best regards, Vladimir Rodionov Principal ...
   Author: Vladimir Rodionov, 2013-10-24, 23:09
[expand - 1 more] - RE: filtering rows for column values not null - HBase - [mail # user]
...This will work ONLY if you add single column to scan. If you scan multiple columns you will need additional filter (reverse SkipFilter) which filter outs all rows (outputs of SingleColumnVal...
   Author: Vladimir Rodionov, 2013-10-24, 16:35
RE: What cause region server to timeout other than long gc? - HBase - [mail # user]
...VM swapping? Did you check swapping?  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: [EMAIL PROTECTED]  _________________________...
   Author: Vladimir Rodionov, 2013-10-23, 06:30
[expand - 2 more] - RE: row filter - binary comparator at certain range - HBase - [mail # user]
...James, good to hear that Phoenix supports these features.  Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: [EMAIL PROTECTED]  ____...
   Author: Vladimir Rodionov, 2013-10-21, 16:50
RE: 'hbase.client.scanner.caching' default value for HBase 0.90.6? - HBase - [mail # user]
...HBase bible (book) have answers on *almost* all questions (1GB default heap is too low for many applications - that is why you see OOME). HBase book: http://hbase.apache.org/book.html  ...
   Author: Vladimir Rodionov, 2013-10-21, 02:37
[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
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