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[expand - 4 more] - Re: keyvalue cache - HBase - [mail # dev]
...random afterthought: a delete-row command could cause problems for a simple HashSet style cache, so you would need a sorted implementation or a more elaborate nested structure.   On Wed...
   Author: Matt Corgan, 2012-04-06, 23:27
[expand - 1 more] - Re: 0.92 and Read/writes not scaling - HBase - [mail # user]
...When you increased regions on your previous test, did it start maxing out CPU?  What improvement did you see?  Have you tried increasing the memstore flush size to something like 5...
   Author: Matt Corgan, 2012-03-26, 13:58
Re: HBASE Code format - HBase - [mail # dev]
...I used to work in a little brick building on the canal in Washington, DC where they invented the punchcard early last century.  If they had just foreseen self-documenting code with thin...
   Author: Matt Corgan, 2012-03-22, 19:19
[expand - 2 more] - Re: Follow-up to my HBASE-4365 testing - HBase - [mail # dev]
...https://issues.apache.org/jira/browse/HBASE-5479  JD - apologies if that was unrelated to your email   On Sat, Feb 25, 2012 at 4:03 PM, Matt Corgan  wrote:  ...
   Author: Matt Corgan, 2012-02-26, 00:51
[expand - 4 more] - Re: hbase 0.94.0 - HBase - [mail # dev]
...I had assumed facebook had integrated HFileV2 into their 0.89 branch a while back and that pretty much all HFiles would have been converted to v2 by now.  I guess that is not correct......
   Author: Matt Corgan, 2012-01-30, 20:01
[expand - 2 more] - Re: RegionServer dying every two or three days - HBase - [mail # user]
...You could always try going with a little smaller heap and see how it works for your particular workload, maybe 4G.  1G block cache, 1G memstores, ~1G GC overhead(?), leaving 1G for acti...
   Author: Matt Corgan, 2012-01-23, 18:37
Re: Limited cross row transactions - HBase - [mail # dev]
... I thought BigTable/Megastore handled this kind of thing by putting everything into a single row with the entity group id as the hbase rowKey.  Then you add all parent and child va...
   Author: Matt Corgan, 2012-01-18, 01:15
[expand - 2 more] - Re: Early comparisons between 0.90 and 0.92 - HBase - [mail # dev]
...I was hoping to rule out changes in IPC handlers and other upper layers and narrow it down to the difference between HFileV1 and HFileV2, but it sounds like you have a lot of moving pieces. ...
   Author: Matt Corgan, 2011-12-15, 20:29
Re: Size of KeyValue - HBase - [mail # dev]
...Even if the blocks aren't being saved into the block cache, aren't they still getting created in the young gen as they're read from disk?  They probably get left behind by the young gen...
   Author: Matt Corgan, 2011-12-02, 00:35
Re: Help with continuous loading configuration - HBase - [mail # user]
...You can set put.setWriteToWAL(false) to skip the write ahead logging which slows down puts significantly.  But, you will lose data if a regionserver crashes with data in its memstore. &...
   Author: Matt Corgan, 2011-11-17, 00:30
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