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Re: querying hbase - HBase - [mail # user]
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...The shell allows you to use filters just like the standard HBase API but with jruby syntax. Have you tried that or that is too painful and you want a simpler tool ? -Viral On Tue...
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Author: Viral Bajaria,
2013-05-21, 22:16
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Re: GET performance degrades over time - HBase - [mail # user]
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...On Fri, May 17, 2013 at 8:23 AM, Jeremy Carroll wrote: Thanks for the tips Jeremy. I have used bonnie++ to benchmark both the fast and slow servers and the outputs of bonnie are...
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Author: Viral Bajaria,
2013-05-17, 20:27
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Re: GET performance degrades over time - HBase - [mail # user]
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...Thanks for all the help in advance! Answers inline.. Hi Viral, Yes I am continuously adding new data. The puts have not slowed down but that could also be an after effect o...
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Author: Viral Bajaria,
2013-05-17, 06:50
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Re: GET performance degrades over time - HBase - [mail # user]
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...Thanks for sharing this info. Will remember for future debugging too. Checked the vm.swappiness and as suggested by Jean-Marc and it is definitely not set to 0. But since we are not swapping...
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Author: Viral Bajaria,
2013-05-16, 19:13
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Re: GET performance degrades over time - HBase - [mail # user]
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...When I look at top it says: 0K total, 0K used, 0K free (as expected). I can try and add some swap but will do it as a last resort as suggested by you....
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Author: Viral Bajaria,
2013-05-16, 18:53
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Re: GET performance degrades over time - HBase - [mail # user]
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...When you say contention what should I be looking for ? slow operations to respond to data block requests ? or some specific metric in ganglia ? -Viral...
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Author: Viral Bajaria,
2013-05-16, 18:50
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Re: GET performance degrades over time - HBase - [mail # user]
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...I have set swap to 0. AFAIK, that's a recommended practice. Let me know if that should not be followed for nodes running HBase. It's the default i.e. 0.25...
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Author: Viral Bajaria,
2013-05-16, 18:43
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GET performance degrades over time - HBase - [mail # user]
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...Hi, My setup is as follows: 24 regionservers (7GB RAM, 8-core CPU, 5GB heap space) hbase 0.94.4 5-7 regions per regionserver I am doing an avg of 4k-5k random gets per regionserv...
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Author: Viral Bajaria,
2013-05-16, 09:16
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Re: Cached an already cached block (HBASE-5285) - HBase - [mail # user]
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...On Sun, May 5, 2013 at 10:45 PM, ramkrishna vasudevan wrote: Yes, it's with LRU cache. My bad, should have copy/pasted the stack trace too. Here you go: java.io.IOExceptio...
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Author: Viral Bajaria,
2013-05-06, 05:49
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Cached an already cached block (HBASE-5285) - HBase - [mail # user]
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...Hi, I have been consistently hitting the following error in one of my QA clusters. I came across two JIRAs, the first one (HBASE-3466) was closed saying "Cannot Reproduce" but a new on...
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Author: Viral Bajaria,
2013-05-06, 05:15
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