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Re: how to stop datanode - HBase - [mail # user]
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...Two ways: 1. To close all DNs, use hadoop-daemons.sh (notice the plural). Doing hadoop-daemons.sh stop datanode will stop all datanodes listed in slaves file. 2. To close an individual...
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Author: Harsh J,
2012-05-17, 02:02
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Re: hbase security - HBase - [mail # user]
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...HBase 0.92 has table-level security (among other goodies). Check out this slide on what all it includes: http://www.slideshare.net/ghelmling/new-hbase-features-coprocessors-and-security &nbs...
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Author: Harsh J,
2012-05-15, 09:24
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Re: Important "Undefined Error" - HBase - [mail # user]
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...Dalia, Is your NameNode running fine? The issue is that HBase Master has been asked to talk to HDFS, but it can't connect to the HDFS NameNode. Does "hadoop dfs -touchz foobar" pass or...
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Author: Harsh J,
2012-05-12, 12:57
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Re: Important "Undefined Error" - HBase - [mail # user]
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...Hi Dalia, On Sat, May 12, 2012 at 5:14 PM, Dalia Sobhy wrote: This is not an error and you shouldn't be worried. It is rather a noisy INFO log that should be fixed (as a DE...
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Author: Harsh J,
2012-05-12, 11:58
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Re: How to run two data nodes on one pc? - HBase - [mail # user]
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...Waled, Since its the same machine, using "localhost" (which refers automatically to 127.0.0.1) and those explicit port numbers should be fine to use. For the DN startup, see my l...
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Author: Harsh J,
2012-05-11, 03:13
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Re: Switching existing table to Snappy possible? - HBase - [mail # user]
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...Jeff, Are you looking for "hbase.online.schema.update.enable"? Its still considered experimental (though I dunno its current state on trunk) to update schemas "on-line" currently. &nbs...
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Author: Harsh J,
2012-05-10, 16:11
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Re: Looking for a single row - HTable.get(Get) or Scan(Get) - HBase - [mail # user]
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...Bryan, Yes, that is true. Essentially Scan.isGetScan() [0] needs to pass before bloom filter checks proceed. And that method passes for single row scans as expected. Multi-gets s...
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Author: Harsh J,
2012-05-10, 14:35
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Re: How to run two data nodes on one pc? - HBase - [mail # user]
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...Waled, I've covered running multiple daemons on a single node (or so called "expanded pseudo-distributed mode"? :)) briefly at http://search-hadoop.com/m/j2iwg1Re6gk with some configs ...
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Author: Harsh J,
2012-05-10, 12:56
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Re: HRegionPartitioner breaks my configuration - HBase - [mail # user]
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...Christoph, I still don't get your issue though. A stack trace of the error thrown out by the components you used would be good to have :) On Thu, May 10, 2012 at 3:38 PM, Christo...
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Author: Harsh J,
2012-05-10, 10:42
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Re: Switching existing table to Snappy possible? - HBase - [mail # user]
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...Jiajun, Expanding on Jean's guideline (and perhaps the following can be used for the manual as well): 1. Ensure snappy codec works properly, following the test listed on http://h...
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Author: Harsh J,
2012-05-10, 04:10
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