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Re: LIRS cache as an alternative to LRU cache - HBase - [mail # dev]
...In general, I agree about making isolated algorithms pluggable.  In this particular case, I think that Ted was trying to gather consensus on ways to increase cache efficiency with LIRS ...
   Author: Nicolas Spiegelberg, 2012-02-21, 18:53
Re: HBase and Data Locality - HBase - [mail # user]
...Note that the importance of non-peak major compactions should be mitigated in 0.92 with multi-threaded compactions.  This config recommendation is not a general solution but a way to co...
   Author: Nicolas Spiegelberg, 2012-02-21, 16:56
Re: Major Compaction Concerns - HBase - [mail # dev]
...Since Bloom Filters are a probabilistic optimization, it's kinda hard to analyze your efficiency.  Mostly, we rely on theory and a little bit of experimentation.  Basically, you wa...
   Author: Nicolas Spiegelberg, 2012-02-20, 03:47
Re: Scans and Bloom Filter - HBase - [mail # user]
...Bryan,  Currently, ROW & ROWCOL Bloom Filters are only checked for explicit, single-row 'Get' scans.  ROWCOL BFs are only checked when you're querying for explicit column qualifier...
   Author: Nicolas Spiegelberg, 2012-02-16, 20:52
Re: Set like functionality - HBase - [mail # user]
...A lot of your design depends on your read/write rate & the amount of duplication in your inserts.  For example, if your read rate is really low and your write rate is really high with a...
   Author: Nicolas Spiegelberg, 2012-02-10, 19:52
Re: svn commit: r1239930 - in /hbase/branches/0.89-fb/src: main/java/org/apache/hadoop/hbase/master/SplitLogManager.java test/java/org/apache/hadoop/hbase/master/TestSplitLogManager.java - HBase - [mail # dev]
...@Stack: this is an 89-master change.  It should have that tag.  I'll look to figure out why the precommit hook isn't working properly.  On 2/2/12 8:59 PM, "Stack"  wrote:...
   Author: Nicolas Spiegelberg, 2012-02-03, 18:52
Re: hbase 0.94.0 - HBase - [mail # dev]
...Correct.  Sorry for the confusion.  I just meant that we shouldn't get rid of the HFileV1 Reader because it allows online upgrades to happen as compactions happen.  Trying to ...
   Author: Nicolas Spiegelberg, 2012-02-03, 01:24
Re: the occasion of the major compact? - HBase - [mail # user]
...As an aside,  If you can't wait for HBASE-4536 and trunk to get RC'd, you can just add a 'Delete' column to logically serve as a client-side delete marker instead of issuing the actual ...
   Author: Nicolas Spiegelberg, 2012-01-26, 21:22
Re: Changing our logo purple to International Orange (Engineering) - HBase - [mail # dev]
...+1  It's much more visible and bold.  I like the Golden Gate reference...  On 1/11/12 8:42 AM, "Stack"  wrote:  ...
   Author: Nicolas Spiegelberg, 2012-01-11, 22:34
Re: Question about HBase for OLTP - HBase - [mail # user]
...1) Eventual Consistency isn't a problem here.  HBase is a strict consistency system.  Maybe you have us confused with other Dynamo-based Open Source projects? 2) MySQL and other tr...
   Author: Nicolas Spiegelberg, 2012-01-09, 23:18
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