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Re: Force the number of map tasks in MR? - HBase - [mail # user]
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...JM, The number of map tasks will be limited by the number of input splits available. Assuming you are reading files, that is. Also, you need to reboot your cluster for those sett...
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Author: Jonathan Bishop,
2012-10-11, 20:50
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Re: Use of MD5 as row keys - is this safe? - HBase - [mail # user]
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...Hi, Thanks everyone for the informative discussion on this topic. I think that for project I am involved in I must remove the risk, however small, of a row key collision, and append th...
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Author: Jonathan Bishop,
2012-07-23, 16:58
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Is this exception caused by an overloaded node? - HBase - [mail # user]
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...Hi, I am running on a cluster where some of the machines are loaded for other purposes. Occasionally an HBase scan fails with the message below, and I suspect this is caused by on or m...
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Author: Jonathan Bishop,
2012-07-20, 16:27
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Use of MD5 as row keys - is this safe? - HBase - [mail # user]
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...Hi, I know it is a commonly suggested to use an MD5 checksum to create a row key from some other identifier, such as a string or long. This is usually done to guard against hot-spottin...
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Author: Jonathan Bishop,
2012-07-20, 16:22
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Re: Region splitting problem - HBase - [mail # user]
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...Sorry, that was meant for Benjamin. Also, you can test your key order using Bytes.compareTo(a,b). I believe that is what is used internally (correct me if I am wrong). On Thu, Jun 28, ...
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Author: Jonathan Bishop,
2012-06-28, 15:07
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Re: Region splitting problem - HBase - [mail # user]
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...Ram, Your key splitting is incorrect - I had the same problem. Give this a try...notice that you need to insert a zero before the first byte to avoid BigInteger from interpreting this ...
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Author: Jonathan Bishop,
2012-06-28, 15:04
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