Performance issues and stats
1996-08-02 15:14:00
We're on the edge of upgrading to V2 Server and possible putting a
OSA1 FDDI in our S/390 MVS where our server resides. Part of our just-
ification for this has been to perform incrementals on more clients
during an off-hours of window of 9p-4a weekdays. Now we're trying
to make sure we haven't got anything out of tune anywhere, on clients
and on the server before we do this ( to prevent the egg on face
syndrome). Let me provide this topology:
Server: 9672 R22 S/390 MVS 4.3.2
DISK: RAMAC1 escon attached
Disk pool spans 6 volumes, and database on a separate vol
Tape: 3494 Library escon attached all 3490 drives
ADSM server level v1r2m14
Network: all TCP/IP traffic
RS/6000 Channel-attached
Token-Ring in RS/6000
campus topology of FDDI Ring and Cicso Routers, so most
(not all) backups flow:
client--->cicso--->FDDI---->cicso---->RS/6000---->Server
most clients on 10MB Ethernet, some on 16 MB Token ring.
Clients: mostly Netware/Solaris/AIX/OS/2 in that order.
About 20 clients kick off 9p-9:15p (half netware/other half unix)
Most UNIX clients are done in 45min-2 hours depending on incremental
need.
Other groups of Netwares come into the mix at 10p 11p and midnite.
No more than 3 at a time.
Most netwares finish, but can ususally take 2x or 3x time to back
the same amount of data as the UNIX clients (most netwares are
486 or higher CPU, 3.x and 4.x). Some will not even finish and
only get around 350MB through in 7 hours!
I've been searching IBMLINK for tricks. Can anyone suggest some more?
I'll let you know, most of the netwares have their TCP buffers and
windows maxxed. I haven't messed much with the TPXGROUPMAX and
TXNBYTELIMITs, but would appreciate any good or bad info about tweaking
these parameters.
Much appreciated.....
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| Jon Austin TSSJCA AT SYSA.ADM.DUKE DOT EDU |
| Systems Programmer, |
| OIT Systems Administration Group |
| 412 North Building, Box 90132 |
| Duke University phone (919)660-7024 |
| Durham, NC 27708-0132 fax (919)660-7029 |
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