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From Frank Luo <j...@merkleinc.com>
Subject RE: is it a good idea to disable tables not currently hot?
Date Fri, 18 Mar 2016 16:32:11 GMT
0.98 on hdp 2.2 currently.

Soon will be on hdp2.3.4, which has HBase 1.1.2.

-----Original Message-----
From: Jean-Marc Spaggiari [mailto:jean-marc@spaggiari.org]
Sent: Friday, March 18, 2016 11:29 AM
To: user
Subject: Re: is it a good idea to disable tables not currently hot?

Hi Frank,

It might be doable.

What HBase version are you running?


2016-03-18 12:25 GMT-04:00 Frank Luo <jluo@merkleinc.com>:

> No one has experience disabling tables?
> -----Original Message-----
> From: Frank Luo [mailto:jluo@merkleinc.com]
> Sent: Thursday, March 17, 2016 4:51 PM
> To: user@hbase.apache.org
> Subject: is it a good idea to disable tables not currently hot?
> We have a multi tenants environment and each client occupies x number
> of hbase regions. We currently have about 500 regions per region
> server and I understand the guideline is less than 200. So we need to
> reduce the region counts. Increasing region file size is no more an
> option because we are already at 5G and I don’t want to go higher.
> Due to our unique use cases, all clients are running for a few hours
> in a day, then being quiet for the rest of time. So I am thinking
> whether it is a good idea to disable all quiet tables and only enable
> them when they are ready to run. Does anyone have experience on that?
> One thing I worry about is the Balancer. I am pretty sure the balancer
> will be confused when regions come and go. And I cannot afford not to
> have it running in case of region server crashes and come back. So
> doesn’t anyone have good ideas how to handle it?
> I already doing compact myself so that is not an issue.
> Another related question, if a region is enabled but not active
> read/write, how much resources it takes in terms of region server?
> Thanks!
> Frank Luo

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