[473] in sapr3-soft
Re: Disaster Recovery for SAP r3
daemon@ATHENA.MIT.EDU (Greg)
Tue Oct 7 08:17:32 1997
To: sapr3-soft@MIT.EDU
Date: 7 Oct 1997 07:16:37 -0500
From: Greg <greg@cyberramp.net> (by way of SAP Moderator <sap-request@realtimeusa.com>)
For a large (350 GB qualifies...) Informix based R3 system, you should
probably be using onbar, a 3rd party storage manager (Legato Networker,
IBM ADSM, HP OmniBack etc...) and a parallel tape storage system that
stacks lots of tapes. I was just browsing Sun's website the other day
and their 4 DLT drive tape unit does 72 GB/hr uncompressed, and their 7
drive unit does 120ish GB/hr, other vendors are similar, some better.
You can run multiple in parallel if needed. Something like that should
make short work of 350 GB, both archive and restore. I've seen
benchmarks (under optimal conditions that SAP doesn't provide...) lately
of vendors producing 1 Terabyte per hour database archival. 48 hours to
recover 350 GB sounds like a stroll in the park if you have the
resources to do it right (and you should...).
Why are you not able to recover in < 48 hrs now?? Are there some
constraints you haven't mentioned? Like using ontape...or worse,
onarchive?
BTW, SAP doesn't support replication do they? Have you tested the
cutover? How'd it go?
Come to think of it, given a large company dependent on a large database
to run its business, I'd make damn sure the server hardware was
sufficiently redundant that a tape restore would *never* be necessary,
short of global thermonuclear war. Tape restores are never good news if
the data is really important.
There's a fellow named James Alfano who's a consultant at SAP who is
into archive and high availability issues. I'd suggest looking him up
if you're serious about HA.
Greg
p.s. congrats on choosing Informix...I'm a big fan personally...
> Does anyone have a disaster recovery plan in place for SAP r3 ?
>
> We have a requirement to restore our SAP operation within 48 hours. We
> have around 350 gigabytes DASD using Informix. Because of the short
> restoral time, we fell we need to have a second live site and use
> replication.
>
> Does anyone have a similar environment and would you be willing to talk
> about your disaster recovery?
>
> Thanks,
> Bill
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