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Re: Hbase MapReduce - HBase - [mail # user]
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...Do you think it would be a good idea to temper the use of CoProcessors? This kind of reminds me of when people first started using stored procedures... Sent from a remote device...
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Author: Michel Segel,
2012-11-24, 18:05
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Re: more regionservers does not improve performance - HBase - [mail # user]
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...Here's a key statement: Again, I am on grid which is used by many others, and the machines in my cluster are not dedicated to my job. I am mainly looking at scalability trends when running w...
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Author: Michel Segel,
2012-10-15, 11:41
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Re: Problem with Hadoop and /etc/hosts file - HBase - [mail # user]
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...Just a hunch, w DNS, do you have your rDNS (reverse DNS lookup) set up corre ctly. Sent from a remote device. Please excuse any typos... Mike Segel On Sep 15, 2012, at 8:04...
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Author: Michel Segel,
2012-09-17, 03:08
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Re: More rows or less rows and more columns - HBase - [mail # user]
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...Option c, depending on the use case, add a structure to you columns to store the data. You may want to update this section.... Sent from a remote device. Please excuse any typos...
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Author: Michel Segel,
2012-09-11, 10:59
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Re: adding data - HBase - [mail # user]
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...Ok, a couple of things.... First, a contrarian piece of advice.... Don't base your performance tuning on your initial load, but on your system a t its steady state. It's a simple conce...
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Author: Michel Segel,
2012-08-04, 12:40
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Re: Use of MD5 as row keys - is this safe? - HBase - [mail # user]
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...http://en.wikipedia.org/wiki/SHA-1 Check out the comparisons between the different SHA algos. In theory a collision was found for SHA-1, but none found for SHA-2 does tha t mean ...
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Author: Michel Segel,
2012-07-22, 12:00
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Re: Use of MD5 as row keys - is this safe? - HBase - [mail # user]
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...I don't believe that there has been any reports of collisions, but if. You a re concerned you could use the SHA-1 for generating the hash. Relatively spe aking, SHA-1is slower, but still fas...
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Author: Michel Segel,
2012-07-20, 19:16
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Re: Rowkey hashing to avoid hotspotting - HBase - [mail # user]
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...Reading hot spotting? Hmmm there's a cache and I don't see any real use cases where you would have it occur naturally. Sent from a remote device. Please excuse any typos... ...
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Author: Michel Segel,
2012-07-17, 16:44
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Re: When node is down - HBase - [mail # user]
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...You don't notice it faster, it's the timeout. You can reduce the timeout, it's configurable. Default is 10 min. There shouldn't be downtime of the cluster, just the node. N...
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Author: Michel Segel,
2012-06-25, 03:14
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Re: Timestamp as a key good practice? - HBase - [mail # user]
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...You can't salt the key in the second table. By salting the key, you lose the ability to do range scans, which is what yo u want to do. Sent from a remote device. Please excuse a...
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Author: Michel Segel,
2012-06-16, 14:35
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