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From Em <mailformailingli...@yahoo.de>
Subject Multiple HBase instances per machine
Date Fri, 15 Jun 2012 17:50:34 GMT
Hello list,

what are your experience with having more than one HBase-instance per
machine?

One reason to do this could be that you got i.e. 32 GB RAM and want to
give 12-14 GB of RAM to each HBase instance so that you got little
issues with Garbage Collection while using the available RAM-capacity
for caching.

One thing I worry about is replication of data. Say two of three
replicas reside at the same box in two distinct HBase instances.
If this box fails for some reason, the risk of loosing data is
relatively high compared to a scenario where all three replicas are
stored at different nodes.

Kind regards,
Em

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