Re: rsync causing disk sleeps and loss of apps

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On Monday 31 January 2011 17:16:05 Richard wrote:
> On Mon, Jan 31, 2011 at 04:13:33PM +0000, Anne Wilson wrote:
> > On Monday 31 January 2011 14:21:32 Richard wrote:
> > > On Mon, Jan 31, 2011 at 12:28:04PM +0000, Anne Wilson wrote:
> > > > On Monday 31 January 2011 11:39:55 Martin (KDE) wrote:
> > > > > Ane, cann you run "lsof | grep pid-of-rsync" if it hangs (where
> > > > > pid-of-rsync is the pid of a rsync process of course)? This command
> > > > > will give you all files rsync tries to attach (at the time you run
> > > > > lsof). If there are more rsync processes, try grep -E
> > > > > "(pid1|pid2|pid3)" instead of the simple grep.
> > > > 
> > > > I seem to be getting the syntax wrong:
> > > > 
> > > > lsof | grep -E (3180|3181|3183)
> > > > bash: syntax error near unexpected token `('
> > > 
> > > not sure if you tried this or took my previous example literally..
> > > $pid was meant to be replaced by the actual PID of rsync. Did realise
> > > too late that my example was very confusing.
> > > 
> > > Try
> > > 
> > >   ps axf|grep rsync
> > > 
> > > take the PID from it and do
> > > 
> > >   ll /proc/pid-number/fd
> > 
> > No problem - I did realise that.
> > 
> > This command gives me three separate pids, the same three as I listed in
> > the command.  Each of those pids lists a whole set of files that it has,
> > presumably, compared when compiling the file list for transfer.  They
> > all appear to have the same file list.  All of them end with
> > 
> > /home/anne/WebPages /mnt/server_home/anne/
> 
> not sure if we are talking about the same thing, I was expecting something
> like
> $ ll /proc/9661/fd
> total 0
> lrwx------ 1 rz rz 64 2011-01-31 18:09 0 -> /dev/pts/7
> lrwx------ 1 rz rz 64 2011-01-31 18:09 1 -> /dev/pts/7
> lrwx------ 1 rz rz 64 2011-01-31 18:09 2 -> /dev/pts/7
> lr-x------ 1 rz rz 64 2011-01-31 18:09 3 -> /home/rz/Mail/kde-lists
> 
> Is your rsync having all files open at the same time? Can't really
> immagine.. but never have debugged rsync.
> 
I did eventually get a file list of that format (totally different content) 
from one of the commands.  Unfortunately I reached the stage where I had to 
give in and reboot.  I can't spare any more time for it tonight, but I'll go 
back to it tomorrow.

> Another method to debug is to start the rsync command with
> "strace -o rsync-debug.log -f rsync arguments"
> 
> You can look at the debug log with any viewer or do something like
> "grep open rsync-debug.log"
> and post the last 30 lines here.
> 
OK, I'll try that too.  Thanks.

Anne
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