Howto to control rsync through cron

[bart.coninckx at sita.be]

How about scheduling a script with some logic built in it that firsts
checks if a previous Rsync still is running. If so, it backs off, if not it
starts the sync.



Rgds,




Bart Coninckx
Network Administrator
CNE, ASE
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Watco ICT Services
Lilsedijk 19
B-2340 Beerse
Belgium

e-mail: bart.coninckx at sita.be
Tel: + 32 (0) 14 60 99 42
Fax: + 32 (0) 14 62 41 47
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                    CAD/SysAdmin                                                                                                    
                    Manager                  To:     rsync at lists.samba.org                                                          
                    <Cad_Manager at vipg        cc:                                                                                    
                    .com>                    Subject:     Howto to control rsync through cron                                       
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                    10/24/2002 21:23                                                                                                
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Hi,


  I have setup a cron job to rsync files between two servers every hour.


30 * * * * rsync -avz --delete rsyncsrv1::ftp/  /export/ftp/


  This works fine most of the time, but if I have a very large file that
needs to be transfered ( many tens of MBs), I run into a problem. Since the
link between my two servers is slow, it can take more than an hour to
complete the rsync transfer. So at the end of the hour, when the next rsync
job is started by cron, the big file transfer gets aborted and a new
transfer is started. Due to this the big file transfer never gets
completed.


  I have tried to increase the time between successive cron jobs, but that
is only a temporary fix untill I run into an even bigger file which causes
the new settings to fail. Is there a way I can control this behaviour, and
avoid this looping ?


  Thanks & regards,
--
Derric Lewis
CAD/System Administrator
Virtual IP Group, Inc.