Re: Huge MDS log crashing the cluster

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On Wed, 23 May 2012, Madhusudhana U wrote:
> Tommi Virtanen <tv <at> inktank.com> writes:
> > The default logrotate script installed by ceph.deb rotates log files
> > daily and preserves 7 days of logs. If your /var is tiny, or you have
> > heavy debugging turned on, you probably need to rotate more often and
> > retain fewer log files. Or, if you're not using the debs, you'll need
> > to provide some other means of rotating the log files.
> 
> In order to log rotate, we need to stop the deamon accessing the log file 
> and them rename it right? I have removed the log file using rm command to 
> check whether it will release the space, but even after the file removal, 
> my /var partition is still full. 
> 
> So, do I have to stop MDS deamon and then remove the log file ? i am not 
> finding any command through which i can stop MDS on node. Can you please
> let me know how i can safely stop the MDS and then start it back ?

1. rename the file
2. send SIGHUP to the daemon and it will reopen (/create a new file)

sage
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