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Re: Early comparisons between 0.90 and 0.92 - HBase - [mail # dev]
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...260k random reads per second is a lot... is that on one node? how many client threads? and is the client going over the network, is it on the datanode, or are you using a special...
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Author: Matt Corgan,
2011-12-15, 20:17
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Re: Early comparisons between 0.90 and 0.92 - HBase - [mail # dev]
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...Regions are major compacted and have empty memstores, so no merging of stores when reading? 2011/12/14 Jean-Daniel Cryans [EMAIL PROTECTED]> 写道：...
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Author: Matt Corgan,
2011-12-15, 01:51
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Re: Size of KeyValue - HBase - [mail # dev]
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...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...
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Author: Matt Corgan,
2011-12-02, 00:35
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Re: Help with continuous loading configuration - HBase - [mail # user]
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...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. &...
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Author: Matt Corgan,
2011-11-17, 00:30
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Re: High throughput input, low latency output? - HBase - [mail # user]
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...We found that 2 cores is not enough to run hbase. 1 core can easily get tied up with a compaction while the other is doing garbage collection. That doesn't leave any headroom for...
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Author: Matt Corgan,
2011-10-07, 20:15
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Re: HBase HMaster/HServer 32bit/64bit issue - HBase - [mail # user]
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...You'd probably have more of an issue with the amount of memory on 32 bit instance types. ~1.7gb. On Wed, Sep 21, 2011 at 12:45 PM, Ronen Itkin wrote: ...
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Author: Matt Corgan,
2011-09-21, 20:00
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Re: prefix compression implementation - HBase - [mail # dev]
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...jacek >> It is a huge chance. It would be great if we could prototype a few things. Especially I would like to avoid any optimizations before we know a got way to measure them. m...
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Author: Matt Corgan,
2011-09-21, 01:04
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ByteBuffer usage - HBase - [mail # dev]
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...Ryan said this on an earlier email: So if the HCell or whatever ends up returning ByteBuffers, then that plays straight in to scatter/gather NIO calls, and if some of them are DBB, the...
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Author: Matt Corgan,
2011-09-20, 19:03
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Re: HBase as a large, auto-partitioned, sorted, *in-memory* database (was: Re: prefix compression implementation) - HBase - [mail # dev]
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...inline below: On Mon, Sep 19, 2011 at 10:08 PM, Stack wrote: is i've given it some thought, but i think it can wait till after the block format stuff is in place. &nb...
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Author: Matt Corgan,
2011-09-20, 18:23
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Re: prefix compression implementation - HBase - [mail # dev]
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...bringing all questions into a single email: stack >> I'd say call it Cell rather than HCell. i did think the H was a very simple way to add uniqueness, like isn't "HFile" a...
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Author: Matt Corgan,
2011-09-20, 17:59
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