[CentOS] rsync via crontab spawns over 20 processes

Don Krause dkrause at optivus.com
Fri Jan 21 20:09:22 UTC 2011


On Jan 21, 2011, at 12:05 PM, aurfalien at gmail.com wrote:

> On Jan 21, 2011, at 11:54 AM, Les Mikesell wrote:
> 
>> On 1/21/2011 1:30 PM, aurfalien at gmail.com wrote:
>>> Hi all,
>>> 
>>> I've been running rsync via cron for a while now and all is well.
>>> 
>>> However on one particular new 5.5 box, whenever its runs via crontab,
>>> the machine ends up with over 20 rsync processes and a load of ~14  
>>> and
>>> eventually the machine dies.
>>> 
>>> But when running manually, I see it spawn 3 processes with a load of
>>> 1.5.
>>> 
>>> My rsync command is simply;
>>> 
>>> rsync --delete -avvH --progress source target
>>> 
>>> Any thoughts?
>> 
>> It sounds like it is not completing one run before the next one  
>> starts.
>> If you have a lot of hardlinks, the -H option can make things slower
>> than you would expect.
> 
> No hard links, some sym links.
> 
> But I see what you are saying.
> 
> Here is my crontab entry via /etc/crontab
> 
> * 22 * * * root rsync --delete -avvH --progress source target
> 
> - aurf

If that's your crontab, you do see that you are actually starting a separate copy of the command every minute in 10PM.

No wonder you're killing you machine, try

0 22 * * * .....

--
Don Krause                                                                   
Head Systems Geek, 
Waver of Deceased Chickens.
Optivus Proton Therapy, Inc.
P.O. Box 608
Loma Linda, California 92354
909.799.8327 Tel
909.799.8366 Fax
dkrause at optivus.com
www.optivus.com
"This message represents the official view of the voices in my head."






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