On Thu, May 7, 2009 at 11:24 AM, Alastair Neil <ajn...@gmail.com> wrote:
> > > On Tue, Apr 28, 2009 at 2:41 PM, Richard Elling > <richard.ell...@gmail.com>wrote: > >> Alastair Neil wrote: >> >>> >>> >>> On Tue, Apr 28, 2009 at 12:44 PM, Richard Elling < >>> richard.ell...@gmail.com <mailto:richard.ell...@gmail.com>> wrote: >>> >>> >>> >>> Alastair Neil wrote: >>> >>> >>> >>> On Mon, Apr 27, 2009 at 6:54 PM, Robert Milkowski >>> <mi...@task.gda.pl <mailto:mi...@task.gda.pl> >>> <mailto:mi...@task.gda.pl <mailto:mi...@task.gda.pl>>> wrote: >>> > >>> > Hello Alastair, >>> > >>> > Monday, April 27, 2009, 10:18:50 PM, you wrote: >>> > >>> > Seems or did you confirm it with mount or df command? >>> > >>> > Do you mount it manually then? >>> > >>> > >>> http://milek.blogspot.com >>> > >>> >>> This is a sample of one of the failures. Clearly the >>> filesystem gets created and the subsequent mount fails >>> because of a copy of files from the skeleton directory to the >>> expected home directory that basically creates a file in place >>> of where the system expects a mountpoint directory. >>> >>> >>> In the script that copies the files, test for the directory and >>> wait in a loop. >>> You shouldn't have to wait more than a second or two. >>> -- richard >>> >>> >>> I could do that but 1 second on each zfs create adds almost 4.5 hours to >>> the time required to run the script. >>> >> >> Use a subshell and put it in the background. >> -- richard > > > > Finally got clear of our building move and have had time to try this. I > have done as you expected so hopefully this will run without issues. I'll > let you know how it goes. > A follow up. With the post "zfs create" stuff split into a background subshell I can get the script to run correctly. I needed to add a check to see if the file system is mounted: zfs_is_mounted () { > ${ZFS} get -H mounted ${1} | ${GREP} "mounted.yes" 2>&1 > /dev/null > return $? > } > if there is a more elegant way of checking this then please let me know. The crux here is the abysmal scaling of zfs. When the script starts it can create a new filesystem every 3 seconds. after a day of running and with 6200 filesystem created it now takes more than 30 seconds to create each filesystem. I shudder to think what the performace will be once I actually share these filesystems.
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