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[expand - 2 more] - Re: how to randomize the primary key which is a timestamp - HBase - [mail # user]
...You could have prefix = timestamp % 64.  Then for a single key lookup, you could calculate the prefix and query just one shard.  For a scan, you have to query all shards and merge ...
   Author: Matt Corgan, 2011-01-10, 17:04
[expand - 2 more] - Re: HBase / HDFS on EBS? - HBase - [mail # user]
...Yeah, EC2 tends to have both low network and disk throughput.  We use it because of the flexibility and because throughput isn't a big concern for us.  Also, fyi, I'm pretty sure f...
   Author: Matt Corgan, 2011-01-05, 16:32
[expand - 1 more] - Re: HBase random access in HDFS and block indices - HBase - [mail # user]
...I was envisioning the HFiles being opened and closed more often, but it sounds like they're held open for long periods and that the indexes are permanently cached.  Is it roughly correc...
   Author: Matt Corgan, 2010-10-19, 04:30
Re: HBase cluster with heterogeneous resources - HBase - [mail # user]
...I could be wrong, but I don't think there's any performance benefit to having a small hdfs block size.  If you are doing a random read fetching a 1KB cell out of an HFile, it will not p...
   Author: Matt Corgan, 2010-10-16, 18:27
[expand - 1 more] - Re: deadlock between split and delete - HBase - [mail # user]
...Sorry - that was the lastest release in the downloads section of hbase.apache.org.  I'll upgrade right away.  We're on 1.6.0_17.  I've seen warnings about u18 having problems....
   Author: Matt Corgan, 2010-09-30, 20:48
[expand - 3 more] - Re: region doesn't split after 32+ GB - HBase - [mail # user]
...Thanks for your help again Stack... sorry i don't have the logs.  Will do a better job of saving them.  By the way, this time the insert job maintained about 22k rows/sec all night...
   Author: Matt Corgan, 2010-09-29, 18:30
Re: .META. not found - HBase - [mail # user]
...I had this problem yesterday, which I think was caused by the -ROOT- region losing it's only row: the one that points to .META.  To fix it i * stopped the HMaster * changed it's config ...
   Author: Matt Corgan, 2010-09-22, 22:08
[expand - 4 more] - Re: lost .META. table - HBase - [mail # user]
...Thanks Stack - worked like a charm, and I think all my data is there.  So does the content of -ROOT- get overwritten, because I think it was different than it should have been?   O...
   Author: Matt Corgan, 2010-09-22, 00:43
[expand - 2 more] - Re: Data size - HBase - [mail # user]
...Again - thanks for the feedback.  I agree it's easy enough to make a 1 byte ColumnFamily name which makes it negligible.  And it just occurred to me that prefix compression could s...
   Author: Matt Corgan, 2010-04-02, 00:07
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB