Thanks but the entire 5 tree is already synced so I don't know why it is going a bit crazy.
-Ross
----- Original Message ----- From: "Prof. P. Sriram" sriram@ae.iitm.ac.in To: "Mailing list for CentOS mirrors." centos-mirror@centos.org Sent: Friday, April 13, 2007 12:04:56 AM (GMT-0600) America/Chicago Subject: Re: [CentOS-mirror] Syncing of CentOS 5 to mirrors.
On Fri, 13 Apr 2007, Ross Hosman wrote:
Does anyone see anything wrong with this crontab
- */6 * * * rsync -avz [blah blah blah]
well, nothing seriously wrong, except you keep launching every four hours, no matter what. so, if a sync does not complete in four hours, you will see multiple instances. i would suspect that the entire 5 tree is not syncing up in 4 hours, so you see multiple instances. i will offer a couple of suggestions.
ditch the z option; most content is already compressed, why try another z on top of it? only end up causing needless cpu load.
write a small script and call the script from crontab; the script could have a couple of lines to do locking so multiple instances will not occur - it would look like so (shameless lifted from debian)
HOSTNAME=`hostname -f` LOCK="somewhere/Archive-Update-in-Progress-${HOSTNAME}" # Check to see if another sync is in progress if lockfile -! -l 43200 -r 0 "$LOCK"; then echo ${HOSTNAME} is unable to start rsync, lock file exists exit 1 fi