é Lambelet
Nestec S.A. / Informatique du Centre
55, av. Nestlé CH-1800 Vevey (Switzerland)
*+41(021) 924 3543 7 +41 (021) 924 4589 * B 133
mail to: rene.lambelet AT nestle DOT com
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> -----Original Message-----
> From: Alexander Liu [SMTP:aliu AT CORPNOTES01.MW-CORP DOT COM]
> Sent: Friday, February 11, 2000 5:20 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: ADSM Performance on SP and 3494
>
> Hi all,
>
> We are running ADSM 3.1 on a R40 (6 way 200MHz) hi node in an SP2. We are
> backup up
> a 1TB DB2 EEE database which is running on 24 silver nodes (2 way 332
> MHz).
> The SP2
> is running at AIX 4.3.2 and PSSP 2.4. The ADSM server has a 3494 attached
> with 16
> 3590 B1A tape drives.
>
> Our problem is that, we started out with 6 drives and completed the backup
> in 12 hours.
> Now that we added 10 drives and 2 additional frames to the 3494, our
> backup is actually
> taking longer to complete 13-14 hours using 8 drives at a time. The DB2
> backups write directly
> to tape. I am hoping to complete the backups within 9 hours or less using
> up to 12 drives.
>
> I have started playing around with the tuning values in ADSM and AIX, but
> have not come up
> with the correct combination. So, if anyone has any experience with a
> similar setup, any help
> is appreciated.
>
> Here are our tuning settings:
>
> SP switch settings on all nodes:
> spoolsize/rpoolsize 16777216 (16MB)
> AIX
> thewall 262144
> sb_max 1310720
> tcp_sendspace 655360
> tcp_recvspace 655360
> ADSM Server
> MoveBatchSize 1000
> MoveSizeThresh 500
> TxnGroupMax 256
> UseLargeBuffers Yes
> TCPBufsize 16384
> TCPWindowsize 0
> TCPNoDelay Yes
> ADSM Client
> TCPBuffsize 32
> TCPWindowsize 640
> txnbyte 25600
> tcpnodelay Y
> uselargebuffers yes
>
>
>
> Thanks for the help. Alex
--0__=qmcrhwA2jwC3SP6yaV17YxtJXyQwLrfZrsxIUNUi9Eeg9rZ6g4o5j7IM--
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