Re: Replicating Live Oracle DataFiles/LUNs to remote site via SAN tool?

I suspect ACFS Snapshots is similar to LVM Snapshots


--
LSC


On Wed, Sep 2, 2009 at 9:27 AM, hrishy <hrishys@xxxxxxxxxxx> wrote:

> Hi
>
> I heard 11gR2 ASM can do snapshots woudl be interesting hwo it would
> compare with SAN based replication
>
> regards
> Hrishy
>
> --- On *Thu, 27/8/09, Goulet, Richard <Richard.Goulet@xxxxxxxxxxx>* wrote:
>
>
> From: Goulet, Richard <Richard.Goulet@xxxxxxxxxxx>
> Subject: RE: Replicating Live Oracle DataFiles/LUNs to remote site via SAN
> tool?
> To: ChrisDavid.Taylor@xxxxxxxxxxxxxxx, "Oracle L" <oracle-l@xxxxxxxxxxxxx>
> Date: Thursday, 27 August, 2009, 4:05 PM
>
>
>  Chris,
>
>     Pros:
>
>          1) For you it's extremely easy to set up.  You just sit back and
> watch the Unix admin do all of the work. I like that.
>          2) If there is a problem with the solution your not on the carpet
> for it.
>          3) If and when you upgrade of patch the remote system gets the
> update as well, less work.  Assuming that ORACLE_HOME is replicated as well.
>
>     Cons:
>
>         1) If the DR database doesn't start for any reason you know who's
> to blame.  You of course.
>         2) If your database expands onto new luns they may or may not be
> included in the replication works.
>         3) Adding a new lun in some products requires downtime because you
> have to rebuild the remote system.
>         4) You need a LARGE network pipe between the sites and it HAS to
> be reliable.
>         5) If you do have a network issue between the sites your database
> can hang because the replication software is bogged down.  Not likely to
> occur immediately or in the event of a short outage, but longer outages will
> get there sooner or later.
>
>     As for expense, yes these solutions are expensive.  There's the cost
> of two identical SANs, the network connection, and the software.  But Oracle
> EE isn't a drop in the bucket either.  On the other hand if you've already
> got EE then replicating via Data Guard  may be more cost effective,
> especially if your not using the standby database as a reporting instance
> and the network pipe isn't large or reliable.
>
>
>
> *Dick Goulet***
> Senior Oracle DBA
> PAREXEL International
>
>
>  ------------------------------
> *From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto:
> oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Taylor, Chris David
> *Sent:* Thursday, August 27, 2009 9:43 AM
> *To:* 'Oracle L'
> *Subject:* Replicating Live Oracle DataFiles/LUNs to remote site via SAN
> tool?
>
>  Any of you guys/gals replicating LIVE datafiles from one SAN to another
> in a remote location?
>
> We're looking at using HP's CA tool to replicate LIVE datafiles across a
> WAN to another SAN.  The replication is block based, so any block that
> changes on the primary LUN is immediately replicated to the remote LUN at
> the remote site.
>
> Is anyone doing anything similar to this?  Pros? Cons?  I have a hard time
> imagining that this is a good idea but perhaps it is doable.
>
> Thoughts?
>
> *Chris Taylor*
> *Sr. Oracle DBA*
> Ingram Barge Company
> Nashville, TN 37205
> Office: 615-517-3355
> Cell: 615-354-4799
> Email: 
> chris.taylor@xxxxxxxxxxxxxxx<http://uk.mc237.mail.yahoo.com/mc/compose?to=chris.taylor@xxxxxxxxxxxxxxx>
>
>
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