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From aaron morton <aa...@thelastpickle.com>
Subject Re: [Cassandra] Running node tool cleanup
Date Wed, 26 Jun 2013 09:00:03 GMT
> Does nodetool cleanup run synchronously or asynchronously ?
Async on the server. 

> If it is running asynchronously is there any way to monitor the progress ?
Nodetool compactionstats

Cheers

-----------------
Aaron Morton
Freelance Cassandra Consultant
New Zealand

@aaronmorton
http://www.thelastpickle.com

On 25/06/2013, at 7:43 AM, Emalayan Vairavanathan <svemalayan@yahoo.com> wrote:

> Thank you Robert and others for answering my questions.
> 
> I started to play with nodetool  and I have few more questions.
> 
> Does nodetool cleanup run synchronously or asynchronously ?
> 
> If it is running asynchronously is there any way to monitor the progress ?
> 
> Thank you
> Emalayan
> 
> From: Robert Coli <rcoli@eventbrite.com>
> To: user@cassandra.apache.org; Emalayan Vairavanathan <svemalayan@yahoo.com> 
> Sent: Thursday, 20 June 2013 10:03 AM
> Subject: Re: [Cassandra] Running node tool cleanup
> 
> On Thu, Jun 20, 2013 at 12:01 AM, Emalayan Vairavanathan
> <svemalayan@yahoo.com> wrote:
> > 1) What will happen if I run nodetool cleanup immediately after bringing a
> > new node up (i.e. before the key migration process is completed) ?
> >        Will it cause some race conditions ? Or will it result in some part
> > of the space never be reclaimed ?
> 
> As I understand it, the new node isn't responsible for the range until
> the migration process is complete, so I presume cleanup will do
> nothing in this case. This is so the old node can continue to serve
> the range during the bootstrap, and in case of bootstrap failure.
> 
> > 2) After adding a new machine, how can I make sure that the key migration is
> > completed ? Should I run nodetool netstats on all the nodes ? Is there any
> > better way ?
> 
> nodetool ring/netstats and/or grepping the log for the
> completed-bootstrap message.
> 
> =Rob
> 
> 


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