 | | RE: How to mirror or Replicate a primary server 's
datatoasecondarymachine | RE: How to mirror or Replicate a primary server 's
datatoasecondarymachine 2005-04-14 - By Tobias Speckbacher
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> -- --Original Message-- --
> From: taroon-list-bounces@(protected)
> [mailto:taroon-list-bounces@(protected)]On Behalf Of Roger "Pe?a
> Sent: Thursday, April 14, 2005 12:00 PM
> To: Discussion of Red Hat Enterprise Linux 3 (Taroon)
> Subject: RE: How to mirror or Replicate a primary server's
> datatoasecondarymachine
>
>
>
> --- Kent Walker <walkerk@(protected)> wrote:
> > I concur with Tobias - use rsync. There's some
> > examples of rsync over ssh at
> >
> > http://www.oreilly.com/catalog/linuxsvrhack/chapter/
> >
>
> that is ok if the "update" to the "master" server
> happen from time to time, so yo can have a cron job to
> make the rsync between the two servers
>
> I thinks that, having rsync in place, the application
> used to update the "master" server should know about
> the syncronization process, maybe it should sincronice
> both servers or just put a mark in the master server
> so the slave or a cron job in the master knows that
> something have to be updated
>
> > Synchronizing a running database is more complex.
> > You can dump the
> > database, transfer the dump file via rsync, then
> > rebuild the database on
> > the understudy server.
"I am considering whether to go down the path of a dual server, manual
failover solution for one of my RHEL fileservers."
I wouldnt have suggested rsync if it had said anything about a database.
Another approach would be to use shared scsi storage, but you mention the
servers being in different locations and your SPOF would just migrate to the
raid container.
-Tobias
>
> that can produce very outdate versions of data in the
> slave server, a better aproach should be the use of
> the sincronization or mirror function inplemented in
> most DB servers out there
>
> or, again, the process that update the database in the
> master also make the update in the slave
>
> just my 2c
>
> roger
> PD: he explicitly mention that he will _manualy_
> switch between the two servers so, he primary concern
> is to have a real sincronization process
>
> Roger Pe?a Escobio
>
> Red Hat Certified Engineer ( RHCE )
>
> Cisco Certified Network Associate ( CCNA )
>
>
>
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