Sure....
Warm Regards,
-----Original Message-----
From: Luke Walker
Sent: 25/05/2012 12.42.55 pm
Subject: Re: [commvault] SAP online backup Issue
No problems, let us know how you go with the results Piyush
Cheers,
Luke
On 25 May 2012 17:11, Piyush Panchal <piyushpanchal85 < at > yahoo.com ([email]piyushpanchal85%40yahoo.com[/email])> wrote:
**
Thanks Luke.....
Warm Regards,
-----Original Message-----
From: Luke Walker
Sent: 25/05/2012 12.38.18 pm
Subject: RE: [commvault] SAP online backup Issue
Multiplexing is done from storage policy copy level, if you enable it for
the SP copy it affects all backups going into that SP copy
whereas multi streaming is done from the sap subclient AND instance
properties under the client computer
On 25 May 2012 16:36, "Piyush Panchal" <piyushpanchal85 < at > yahoo.com ([email]piyushpanchal85%40yahoo.com[/email])> wrote:
**
Luke,
Can we enable multiplexing for single SAP database backup ?
Tnx
Sent from my Nokia phone
-----Original Message-----
From: Luke Walker
Sent: 25/05/2012 12.26.45 pm
Subject: RE: [commvault] SAP online backup Issue
This may also mean you need to use multiplexing to ensure your backups
complete in time, so factor that into your testing, this site we have
multiplexing set to 3 (here our testing came out best with DB backups run
to tape with 6 streams, logs to disk with 4 streams... So 2 tape drives
per
database backup...)
I would advise to try to not use multiplexing above a factor of 4-5 with
sap as the higher the mpx factor, the slower the restores
On 25 May 2012 16:22, "Luke Walker" <luke < at > blackduck.nu ([email]luke%40blackduck.nu[/email])> wrote:
SAP util-file, for top performance should be run with multiple
streams..
Start with 4x and test performance as appropriate, we found testing in
increments of 2x helped greatly in fine tuning sap performance
Also we had to send logs in multiple streams to disk, using a D2D2T
storage policy for best performance and to allow us to keep our logs on
tape for a long time while only retaining thrm on disk for a couple of
Weeks (again start with 4x streams and test)
On 25 May 2012 16:16, "piyushpanchal85 < at > yahoo.com ([email]piyushpanchal85%40yahoo.com[/email])" <
piyushpanchal85 < at > yahoo.com ([email]piyushpanchal85%40yahoo.com[/email])> wrote:
**
Hi Luke,
Are you using util file, rman file?
-> Through util file
Are you writing to disk or tape?
-> Writing to tape
how many streams are you using for both database and log backups?
-> Single stream for both backup
do you see more slow down with database backup phase or log phase or
the
whole backup overall?
-> It whole overall backup
Piyush
Sent from my Nokia phone
-----Original Message-----
From: Luke Walker
Sent: 25/05/2012 11.31.37 am
Subject: Re: [commvault] SAP online backup Issue
Are you using util file, rman file?
Are you writing to disk or tape?
how many streams are you using for both database and log backups?
do you see more slow down with database backup phase or log phase or
the
whole backup overall?
On 25 May 2012 14:40, "piyushpanchal85 < at > yahoo.com ([email]piyushpanchal85%40yahoo.com[/email])" <
piyushpanchal85 < at > yahoo.com ([email]piyushpanchal85%40yahoo.com[/email])>
wrote:
**
Hi All,
We are taking SAP online backup on alternate days and backup size is
3.5
TB and It takes 2-3 days for job completion. I would like to know Is
ther
any way to take incremetal or diffrential backup ? Any best
practices
which
we want to follow in this case ?
Pl suggest ...
appreciate your feedback
Piyush,
Sent from my Nokia phone
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