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Re: getting real, does hbase need constant mothering or can a 1-man show use it? - HBase - [mail # user]
...All things considered, I tend to see HBase as being a little more on the "i ndustrial strength" side of things. It's designed to handle really large da ta volumes and run on tens or hundreds...
   Author: Ian Varley, 2012-05-19, 17:17
Re: understanding the code base, patterns, threading, etc. - HBase - [mail # dev]
...Well, the first answer is always the same: read the code! :)  Of course, sometimes it's difficult to get the high level concepts quickly  that way (even with good docs, like the HB...
   Author: Ian Varley, 2012-05-17, 13:44
Re: hbase as a primary store, or is it more for "2nd class" data? - HBase - [mail # user]
...Ahmed,  Generally speaking, the intent of HBase IS to be a first class data store.  It's a young data store (not even 1.0) so you have to take that into accoun t; but there's been ...
   Author: Ian Varley, 2012-05-14, 14:48
Re: Overwriting qualifiers in an existing table - HBase - [mail # user]
...Map/Reduce jobs are generally the best approach for working with every row  in a table. You can read all about it here:  http://hbase.apache.org/book.html#mapreduce  I've neve...
   Author: Ian Varley, 2012-04-24, 08:35
Re: More tables, or add a prefix to each row key? - HBase - [mail # user]
...Tom,  The overall tradeoff with "table vs prefix" is that the former adds some (s mall) amount of cluster management overhead for each new table, whereas the  latter adds runtime o...
   Author: Ian Varley, 2012-04-19, 16:48
Re: Performance issues of prepending a table - HBase - [mail # user]
...I would guess that this approach would be susceptible to the same kind of " hot spotting" as inserting sequential keys; if you're prepending globally ( i.e. there's one global "first" row), ...
   Author: Ian Varley, 2012-04-18, 14:11
Re: Is htable.delete(List<Delete>) transactional? - HBase - [mail # user]
...More complex answer: generally, nothing that involves more than a single ro w in HBase is transactional. :)  It's possible that HBase might get some limited form of multi-row transacti ...
   Author: Ian Varley, 2012-04-16, 23:41
[HBASE-5717] Scanner metrics are only reported if you get to the end of a scanner - HBase - [issue]
...When you turn on Scanner Metrics, the metrics are currently only made available if you run over all records available in the scanner. If you stop iterating before the end, the values are nev...
http://issues.apache.org/jira/browse/HBASE-5717    Author: Ian Varley, 2012-04-13, 18:32
[HBASE-5770] Add a clock skew warning threshold - HBase - [issue]
...There's currently an exception thrown by the master when a region server attempts to start up with clock skew greater than some configured amount (defaulting to 30 seconds). However, it'd be...
http://issues.apache.org/jira/browse/HBASE-5770    Author: Ian Varley, 2012-04-13, 18:32
Re: Schema Updates: what do you do today? - HBase - [mail # user]
...Thanks, Andy. Yeah, a tool that compares a schema definition with a running  cluster, and gives you a way to apply changes (without offlining, where po ssible), would be pretty sweet. &...
   Author: Ian Varley, 2012-04-09, 19:39
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