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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...I should follow up with that I was asking why he was using an HTable Pool, not saying that it was wrong. Still. I think in the pool the writes shouldn't have to go to the WAL. ...
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Author: Michael Segel,
2013-02-19, 16:29
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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...Good question.. You create a class MyRO. How many instances of MyRO exist per RS? How many queries can access the instance MyRO at the same time? &nbs...
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Author: Michael Segel,
2013-02-19, 16:01
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Re: HBase without compactions? - HBase - [mail # user]
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...Well M7 is supposed to be in open public beta, I think. I haven't had time to play with it, but MapR has a lot of nice features that can't really be done in HDFS. It...
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Author: Michael Segel,
2013-02-19, 06:47
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Re: HBase without compactions? - HBase - [mail # user]
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...He asked for a compactionless version. You still have compactions w a stripe compaction. On Feb 18, 2013, at 10:54 PM, Ted Yu wrote: ...
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Author: Michael Segel,
2013-02-19, 05:46
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Re: HBase without compactions? - HBase - [mail # user]
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...In a single word, yes. Or rather you can't have a compactionless HBase without fixing the deficiencies in HDFS. On Feb 18, 2013, at 11:01 PM, Otis Gospodnetic wrote: ...
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Author: Michael Segel,
2013-02-19, 05:46
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Re: HBase without compactions? - HBase - [mail # user]
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...Take a look at MapR's M7 For Apache based Hadoop and HBase, you will need to evolve HDFS. On Feb 18, 2013, at 9:30 PM, Otis Gospodnetic wrote: ...
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Author: Michael Segel,
2013-02-19, 04:50
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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...Well... if you look at the OP's code, there's a couple things I think could be causing a bit of the overhead on the writes. Lets see if he fixes his code and see if there are a...
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Author: Michael Segel,
2013-02-18, 18:42
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Re: Optimizing Multi Gets in hbase - HBase - [mail # user]
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...So you'd have to do a little bit of home work up front. Supposed you have to pull some data from 30K rows out of 10 Mil? If they are in sort order, you could determine the regions and...
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Author: Michael Segel,
2013-02-18, 12:52
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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...Well it also goes back to the question of how the RO is writing to the second table. I would imagine that if the M/R uses Mapper.setup() to instantiate the HTable for the index write ...
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Author: Michael Segel,
2013-02-18, 12:45
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Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
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...The issue I was talking about was the use of a check and put. The OP wrote: My question is why does the OP use a checkAndPut, and the RegionObserver's postChecAndPut? ...
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Author: Michael Segel,
2013-02-18, 12:11
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