Also, you might have read that an initial loading of data can be better
distributed across the cluster if the table is pre-split rather than
starting with a single region and splitting (possibly aggressively,
depending on the throughput) as the data loads in. Once you are in a stable
state with regions distributed across the cluster, there is really no
benefit in terms of spreading load by managing splitting manually v/s
letting HBase do it for you. At that point it's about what Ian mentioned -
predictability of latencies by avoiding splits happening at a busy time.
On Thu, Aug 30, 2012 at 4:26 PM, Ian Varley wrote:
The Facebook devs have mentioned in public talks that they pre-split their
tables and don't use automated region splitting. But as far as I remember,
the reason for that isn't predictability of spreading load, so much as
predictability of uptime & latency (they don't want an automated split to
happen at a random busy time). Maybe that's what you mean, Mohit?
On Aug 30, 2012, at 5:45 PM, Stack wrote:
On Thu, Aug 30, 2012 at 7:35 AM, Mohit Anchlia wrote:
From what I;ve read it's advisable to do manual splits since you are able
to spread the load in more predictable way. If I am missing something
please let me know.
Where did you read that?