PROTECTED]
voice: 804-828-4807
Petr Prerost
cc:
Sent by: Subject: Re: Database backup performance
"ADSM: Dist
Stor Manager"
<[EM
kerstorfer
[EMAIL PROTECTED] am 05.07.2001 18:14:35
Bitte antworten an [EMAIL PROTECTED]
An: [EMAIL PROTECTED]
Kopie: (Blindkopie: Gerhard Wolkerstorfer/DEBIS/EDVG/AT)
Thema:Re: Database backup performance
*1*
I have increased it to 9 to see what happens.
This could help in a
Petr Prerost
cc:
Sent by: Subject: Re: Database backup performance
"ADSM: Dist
Stor Manager"
<[EMAIL PROTECTED]
Hi Zoltan ,
what is your tapeiobufs setting ? Can you see better tape throughput with
migration processing ?
regards
Petr
- Puvodnm zprava -
Od: "Zoltan Forray/AC/VCU" <[EMAIL PROTECTED]>
Komu: <[EMAIL PROTECTED]>
Odeslano: 2. cervence 2001 15:47
Pr
Zoltan,
Your cache hit percentage is way too low, but that is not going to impact on
your database backup
performance anyway.
I am not sure that you need to increase the number of bufferpool pages.
My database is larger and has a smaller bufferpool with a better cache hit %.
If you are happy
I want to thank everyone who responded to my question(s). It seems that
*EVERYONE* goes faster than us, some by a big margin.
I just finished upgrading the OS/390 server from ADSM 3.1.2.50 to TSM
4.1.3. I was hoping the DB backup would be faster. Unfortunately, there is
"no joy in Mudville".
T
Our db backup stats are below. We do 2 db backups
per day, one to disk and one to tape.
all pages: 11,266,048 (44g)
used pages: 8,387,060 (34g)
disk bkup: 60min - local ESS disk
tape bkup: 60min - 3590 drives
processor: 6k-s7a
We back up 19,591,179 pages in 4 hours. This is an 83GB database, 91%
utilized. Server is an RS/6000 M80. Backup media is DLT 7000
tape. Translates to 5.3MB/s by my calculation. Our incremental backups
usually take 15-30 minutes.
Zoltan,
I have a very large os/390 server. The last full dbb went at a rate of
3.3 million pages/hr, almost 5 times fater than yours.
Since v1 r1 of adsm I haven't found any tricks to speed this up
except to change hardware. My current system is
cpu: 9672-ra6
tape: 9840 running 3590 emulation
Zoltan,
Sorry I forgot to mention, as you are OS390 it will be worth looking at the RMF
statistics
for the period of the database backup. This should show which resource is
causing your backup to run so slow. It could be cpu or possibly disk
contention,
John
Stor Manager" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc:(bcc: John Naylor/HAV/SSEG)
Subject: Re: Database backup performance
I guess I should have clarified that the server is on OS/390, not *NIX !!
Thanks for all the responses on how long it takes. Now, how about ways to
im
I guess I should have clarified that the server is on OS/390, not *NIX !!
Thanks for all the responses on how long it takes. Now, how about ways to
improve the speed ?
I am trying a backup to 3590 drives, to see how much of a difference it
makes. So far, there does seem to be a speed difference.
=...)
> > -Original Message-
> > From: Zoltan Forray/AC/VCU [SMTP:[EMAIL PROTECTED]]
> > Sent: Wednesday, June 27, 2001 3:37 PM
> > To: [EMAIL PROTECTED]
> > Subject: Database backup performance
> >
> > Any suggestions on how to improve DB backup performance ?
Doing the math on the quoted database backup sizes and times, plus
my own, shows customers experiencing a db backup data rate of
3 - 4 MB/sec. That is well below the capabilities of the disk and
tape technology in use, and points to the often-criticized TSM
database system being the drag on perfo
Our DB is 13.5GB, 65% utilized. Full backup in 30 minutes to IBM 3575 library with
C-XL drives.
TSM 3.7.4.0 on AIX 4.3.3, IBM RS6000 F50.
David Longo
>>> [EMAIL PROTECTED] 06/27/01 09:37AM >>>
Any suggestions on how to improve DB backup performance ?
Doing a FULL DB backup of our 15GB ADSM (y
Our DB is 21 GB, 85% Utilized. Backup time is 34 minutes.
Running TSM 3.7.4 on Windows 2000. Backup to DLT 7000 tape.
This translates to about 9 MB/sec.
Tim Rushforth
City of Winnipeg
>Doing a FULL DB backup of our 15GB ADSM (yes, not TSM YET. Hoping to
convert to 4.1.3 RSN !!) server, sometimes takes 4-hours.
>Since I read a previous message about someone having a 52GB DB, I was
wondering how long it takes to backup that much DB since my meager DB takes
so long ?
About 3
-
> From: Zoltan Forray/AC/VCU [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, June 27, 2001 3:37 PM
> To: [EMAIL PROTECTED]
> Subject: Database backup performance
>
> Any suggestions on how to improve DB backup performance ?
>
> Doing a FULL DB backup of our 15GB
Any suggestions on how to improve DB backup performance ?
Doing a FULL DB backup of our 15GB ADSM (yes, not TSM YET. Hoping to
convert to 4.1.3 RSN !!) server, sometimes takes 4-hours.
Since I read a previous message about someone having a 52GB DB, I was
wondering how long it takes to backup tha
19 matches
Mail list logo
