how to can I rsync files frequently upon regular intervals from one server to another

mannoj87 · 05-31-2012, 06:50 AM

how to can I rsync files frequently upon regular intervals from one server to another?? Whenever file A is updated on server1 the file should reflect its changes on server2 immediately. Is there a way or I should go only with "rsync -t file_a 192.168.21.7:/tmp/ " and put in cron to update every minute?

evo2 · 05-31-2012, 06:58 AM

Hi,

that question screams for the answer "cron". Try putting "cron tutorial" or "cron howto" into your favourite search engine.

Assuming you are using rsync over ssh, you'll probably also want to setup private/public key based authentication (without a passphrase). There are plenty of howtos on this topic too.

Have a read and let us know how you get on.

Cheers,

Evo2.

pan64 · 05-31-2012, 07:16 AM

I think there is no way to automatically sync server2 any time when something has changed on server1 immediately, but surely you can white a small script to sync and configure cron to start it in every minute/second/hour...

rizzy · 05-31-2012, 08:20 AM

i've not tried it myself, just an idea. Using watch or inotify tools to monitor a folder/file for changes, execute a script on trigger (rsync).
http://en.wikipedia.org/wiki/Inotify
http://linux.die.net/man/1/watch

evo2 · 06-01-2012, 01:28 AM

Indeed, if the OP had asked to run the rsync when files were updated I would have suggested incron, but since the query was about regular time intervals cron seemed to be the obvious answer.

Evo2.

mannoj87 · 06-01-2012, 01:54 AM

incron seems to be a better one for now. Though it uses rsync again, but this helps me to update the destination host whenever the file is written on source. This works with the help of <file_change_mask> option - in incron IN_CLOSE_WRITE, IN_MODIFY . Looks cool !! Thanks for your suggestion Evo