Can rsync monitor a file system?

[Charles.Berman at pfpc.com]

How would you set a cron to run every 30 seconds? Otherwise it could work
for me.

______________________

Charles Berman
Senior Unix Administrator

"Think Globally"


                                                                           
             "Tim H"                                                       
             <tim at simulat.com>                                             
                                                                        To 
             06/27/2006 01:42          "Tony Abernethy"                    
             AM                        <tony at servacorp.com>,               
                                       <Charles.Berman at pfpc.com>,          
                                       <rsync at lists.samba.org>             
                                                                        cc 
                                                                           
                                                                   Subject 
                                       Re: Can rsync monitor a file        
                                       system?                             
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




what about scripts running every 30 seconds on each machine,
thats lighter then rsync just to compare..
eg.

---- Server1 ----
ls -lR /* > ~/files1
scp files1 SERVER2:~

---- Server2 ----
ls -lR /* > ~/files2
(do a diff command here on files1 vs. files2)
(if different, then run rsync -u)


----- Original Message -----
From: "Tony Abernethy" <tony at servacorp.com>
To: <Charles.Berman at pfpc.com>; <rsync at lists.samba.org>
Sent: Monday, June 26, 2006 1:16 PM
Subject: RE: Can rsync monitor a file system?


> To monitor the file system, you have to have something down inside
> the file system. Unless you know what you are doing, you don't really
> want to mess around with any such. Any slipup ....
>
> "copy each others data"
> Now if this means "an update to one implies an update to the other"
> that should be doable.
> If it means "a delete from one imples a delete from both"
> (me, I'm "brave and daring" but I wouldn't even try.)
>
> I can see two reasonable ways.
> 1) have an rsync daemon running on each server and a constantly running
> script on each server going either to or from the other server.
> 2) have an rsync daemon running on one server and a constantly running
> script on the other, alternately pushing and pulling.
>
> Regardless, -u (--update) is probably what you want.
> You may want to exclude rsync temporaries somehow
> (--exclude='.*'  might be what you want)
> (Copying a temporary of a temporary after  ... if (when) something goes
> down)
> You can get a wee bit of a mess if cron jobs start stepping on each
other.
> No real damage other than producing multiple copies of dead temporaries.
>
>
> > -----Original Message-----
> > From: rsync-bounces+tony=servacorp.com at lists.samba.org
> > [mailto:rsync-bounces+tony=servacorp.com at lists.samba.org]On Behalf Of
> > Charles.Berman at pfpc.com
> > Sent: Monday, June 26, 2006 2:47 PM
> > To: rsync at lists.samba.org
> > Subject: Can rsync monitor a file system?
> >
> >
> >
> > I am trying to get two servers to copy each others data to the other
> > server.
> > I need it to be done real time a not use a cron.
> >
> > Can rsync running as a daemon monitor the files system to trigger a
> > transmission?
> >
> > If so how do I configure it?
> >
> > I am running Solaris 9.
> >
> > Thank you.
> >
> > ______________________
> >
> > Charles Berman
> > Senior Unix Administrator
> >
> > "Think Globally"
> >
> >
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