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From lars hofhansl <la...@apache.org>
Subject Re: Smarter Region assignment policy?
Date Tue, 23 Jul 2013 00:09:29 GMT
Yep. Seems stale. You can try to comment on it to revive.



----- Original Message -----
From: Vladimir Rodionov <vrodionov@carrieriq.com>
To: "dev@hbase.apache.org" <dev@hbase.apache.org>; lars hofhansl <larsh@apache.org>
Cc: 
Sent: Monday, July 22, 2013 4:21 PM
Subject: RE: Smarter Region assignment policy?

Is not this https://issues.apache.org/jira/browse/HBASE-6143?

Best regards,
Vladimir Rodionov
Principal Platform Engineer
Carrier IQ, www.carrieriq.com
e-mail: vrodionov@carrieriq.com

________________________________________
From: lars hofhansl [larsh@apache.org]
Sent: Monday, July 22, 2013 4:04 PM
To: dev@hbase.apache.org
Subject: Re: Smarter Region assignment policy?

Hmm... So that's an interesting bug then. Might filing a jira?

-- Lars



----- Original Message -----
From: Vladimir Rodionov <vrodionov@carrieriq.com>
To: "dev@hbase.apache.org" <dev@hbase.apache.org>; lars hofhansl <larsh@apache.org>
Cc:
Sent: Monday, July 22, 2013 3:30 PM
Subject: RE: Smarter Region assignment policy?

OK, you right and I was not. If I do not disable/enables tables after cluster restart  all
regions seem get assigned correctly.
I think its disabling/enabling tables shuffles regions in a bad way.

Best regards,
Vladimir Rodionov
Principal Platform Engineer
Carrier IQ, www.carrieriq.com
e-mail: vrodionov@carrieriq.com

________________________________________
From: lars hofhansl [larsh@apache.org]
Sent: Monday, July 22, 2013 12:13 PM
To: dev@hbase.apache.org; lars hofhansl
Subject: Re: Smarter Region assignment policy?

This is the one:
https://issues.apache.org/jira/browse/HBASE-4402


I assume you let the master wait sufficiently to give all RegionServer a chance to sign in?

-- Lars
________________________________
From: lars hofhansl <larsh@apache.org>
To: "dev@hbase.apache.org" <dev@hbase.apache.org>
Sent: Monday, July 22, 2013 11:55 AM
Subject: Re: Smarter Region assignment policy?


I faintly remember there was a jira that attempted to assign the regions to the same region
servers after a restart based on existing .META. information (if possible).
Will try to find that and see why it is not working as expected.


-- Lars



________________________________
From: Vladimir Rodionov <vrodionov@carrieriq.com>
To: "dev@hbase.apache.org" <dev@hbase.apache.org>
Sent: Monday, July 22, 2013 11:43 AM
Subject: RE: Smarter Region assignment policy?


Yes, its related but not what I am looking for.

Locality index is approaching to 100% after major compaction of all tables. Its often >
90% during regular operation of a cluster,
but is far below 50% when cluster restarts. Can assignment manager take into account previous
region assignments on
node/cluster start up? That is what I am looking for. How hard is to implement this feature?

Best regards,
Vladimir Rodionov
Principal Platform Engineer
Carrier IQ, www.carrieriq.com
e-mail: vrodionov@carrieriq.com

________________________________________
From: Ted Yu [yuzhihong@gmail.com]
Sent: Monday, July 22, 2013 11:06 AM
To: dev@hbase.apache.org
Subject: Re: Smarter Region assignment policy?

Please take a look at https://issues.apache.org/jira/browse/HBASE-4755

On Mon, Jul 22, 2013 at 10:56 AM, Vladimir Rodionov <vrodionov@carrieriq.com
> wrote:

> It seems that current (0.94.6) region assignment on start up policy is not
> that smart and does not utilize hdfs block locality
> Are there any open HBase JIRA ticket(s) that addresses the issue?
>
> Best regards,
> Vladimir Rodionov
> Principal Platform Engineer
> Carrier IQ, www.carrieriq.com
> e-mail: vrodionov@carrieriq.com
>
>
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