"Jason A. Smith" <[EMAIL PROTECTED]> wrote:
> We do it with a modified gmetad init script (patch attached from old
> version of gmetad), and for backups, we just do a nightly restart of
> gmetad.
Thank you. I didn't do it exactly the way you did, but I used yours
as a template. I decided to use rsync without --delete as my way of
ensuring we don't delete metrics from disk if something is wrong with
the tmpfs directory. Here are my additions to /etc/init.d/gmetad :
TMPFS=/ganglia/rrds
At the beginning of the start section:
# restore from disk to tmpfs if necessary
if [ "$TMPFS" -a ! -d $TMPFS ]; then
echo -n "Restoring /ganglia/rrds from /var/lib/ganglia/rrds..."
rsync -azH /var/lib/ganglia/rrds /ganglia/
echo "done."
fi
At the end of the stop section:
# back up from tmpfs to disk
if [ "$TMPFS" -a $RETVAL -eq 0 -a -d $TMPFS/__SummaryInfo__ ]; then
echo -n "Saving /ganglia/rrds to /var/lib/ganglia/rrds..."
rsync -azH /ganglia/rrds /var/lib/ganglia/
echo "done."
fi
And here is my cron job to back up from tmpfs to disk every 10min:
0,10,20,30,40,50 * * * * if [ -d /ganglia/rrds/__SummaryInfo__ ]; then rsync
-azH /ganglia/rrds/ /var/lib/ganglia/rrds/; fi 2>&1 | /usr/local/bin/cronmail
sysadmin
P.S.
cronmail is a very short script I wrote that emails the output piped
to it, with a nice subject line that has host, time, and first line of
output, but only if the output piped to it was non-blank; if what it
read was entirely whitespace, it silently does nothing
http://thwip.sysadmin.org/cronmail
-- Cos
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