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Re: IncreasingToUpperBoundRegionSplitPolicy.shouldSplit() logic question - HBase - [mail # dev]
...File a jira, JMS? Looks like to simple fix, can pull into 0.94.11 (which I'll spin early next week, promised).      ________________________________  From: Stack  To...
   Author: lars hofhansl, 2013-08-11, 05:39
Re: Using HBase timestamps as natural versioning - HBase - [mail # user]
...If you want deletes to work correctly you should enable KEEP_DELETED_CELLS for your column families (I still think that should be the default anyway). Otherwise time-range queries will not b...
   Author: lars hofhansl, 2013-08-11, 05:21
Re: Hadoop-HBase table hierarchical column scan - HBase - [mail # user]
...It all depends on how many other columns you have, whether the skip-scanning the filter does is beneficial or not. It should not worsen the performance, though. If it does we should do some ...
   Author: lars hofhansl, 2013-08-10, 04:38
Re: scan very slow in hbase - HBase - [mail # user]
...In addition to that, make sure you have scanner caching enabled (Scan.setCaching). By default (in 0.94) every call to scanner.next() causes its own RPC request.     _______________...
   Author: lars hofhansl, 2013-08-06, 16:29
Re: Heads up, HTablePool will be deprecated in 0.94, 0.95/0.96, and removed in 0.98 - HBase - [mail # dev]
...Thanks Andy,  as part of the patch I'll convert some of the unitests. There are some conveniences we will no longer have such as a method that can create a table and return and HTable t...
   Author: lars hofhansl, 2013-08-06, 00:51
0.94.11 this week - HBase - [mail # dev]
...Any last wishes (for 0.94.11)?  ...
   Author: lars hofhansl, 2013-08-05, 20:21
Re: How many column families in one table ? - HBase - [mail # user]
...BigTable has one more level of abstraction: Locality Groups A Column Family in HBase is both a Column Faimily and a Locality Group: It is a group of columns *and* it defines storage paramete...
   Author: lars hofhansl, 2013-08-04, 16:03
Re: Why HBase integation with Hive makes Hive slow - HBase - [mail # user]
...Need to set scanner caching, otherwise each call to next will be an network RTT.    ________________________________  From: Hao Ren  To: [EMAIL PROTECTED]  Sent: Thu...
   Author: lars hofhansl, 2013-08-01, 19:00
Re: HBase read perfomnance and HBase client - HBase - [mail # dev]
...Yeah, that would seem to indicate that seeking into the block is not a bottleneck (and you said earlier that everything fits into the blockcache). Need to profile to know more. If you have t...
   Author: lars hofhansl, 2013-08-01, 06:15
Re: Handlers being blocked during reads - HBase - [mail # user]
...Do you think we should change it to use a ConcurrentHashMap (or maybe a HashSet with locking), instead? Copy on write is good when change is rare and amount of data to be copied is small... ...
   Author: lars hofhansl, 2013-07-30, 06:08
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