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Re: more regionservers does not improve performance - HBase - [mail # user]
...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...
   Author: Michel Segel, 2012-10-15, 11:41
Re: Problem with Hadoop and /etc/hosts file - HBase - [mail # user]
...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...
   Author: Michel Segel, 2012-09-17, 03:08
Re: More rows or less rows and more columns - HBase - [mail # user]
...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...
   Author: Michel Segel, 2012-09-11, 10:59
Re: adding data - HBase - [mail # user]
...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...
   Author: Michel Segel, 2012-08-04, 12:40
[expand - 1 more] - Re: Use of MD5 as row keys - is this safe? - HBase - [mail # user]
...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 ...
   Author: Michel Segel, 2012-07-22, 12:00
Re: Rowkey hashing to avoid hotspotting - HBase - [mail # user]
...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...  ...
   Author: Michel Segel, 2012-07-17, 16:44
Re: When node is down - HBase - [mail # user]
...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...
   Author: Michel Segel, 2012-06-25, 03:14
Re: Timestamp as a key good practice? - HBase - [mail # user]
...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...
   Author: Michel Segel, 2012-06-16, 14:35
Re: Full text search on HBase - HBase - [mail # user]
...That's actually a bit out of date.  Sent from a remote device. Please excuse any typos...  Mike Segel  On Jun 6, 2012, at 8:56 AM, Otis Gospodnetic  wr ote:  com/spm...
   Author: Michel Segel, 2012-06-08, 08:13
Re: HBase (BigTable) many to many with students and courses - HBase - [mail # user]
...Depends... Try looking at a hierarchical model rather than a relational model...  One thing to remember is that joins are expensive in HBase.    Sent from a remote device. Ple...
   Author: Michel Segel, 2012-05-29, 10:39
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