ADSM-L

Re: BACKUP to TAPE, PERFORMANCE II

2002-05-30 14:09:18
Subject: Re: BACKUP to TAPE, PERFORMANCE II
From: Gianluca Mariani1 <gianluca_mariani AT IT.IBM DOT COM>
Date: Thu, 30 May 2002 20:07:30 +0200
Fran,
one parameter you can change is Bufpoolsize on the server. for  1GB of real
RAM you should put it  to 131072. the other thing is to turn compression
off, in a single client, fast client, fast server, fast network it gives
better performance.
then on the AIX server try
no -o rfc1323=1
no -o thewall=131072
no -o sb_max=1310720
use vmtune to view virtual memory settings. if the filesystem is jfs you
should put maxpgahead to maximum (-R256). stop virtual memory paging by
modifying minperm/maxperm parameters (default is -P80, lower it to -P50 but
watch minperm).

on the client check if compression actually makes files bigger, and check
how many retries there are when sending data to server. put TxnGroupMax to
the maximum (256) if retries are rare. you can raise TxnByteLimit (maximum
is 2097152). MoveBatchSize should be 1000, MoveSizeThresh 500 (2048 for TSM
5.1), set ExpInterval to 0.

then pray...

Cordiali saluti
Gianluca Mariani
 Tech Support SSD
Via Sciangai 53, Roma
 phones : +39(0)659664598
                   +393351270554 (mobile)
gianluca_mariani AT it.ibm DOT com



                      Francisco Molero
                      <fmolero AT YAHOO DOT CO        To:       ADSM-L AT 
VM.MARIST DOT EDU
                      M>                       cc:
                      Sent by: "ADSM:          Subject:  BACKUP to TAPE,  
PERFORMANCE II
                      Dist Stor
                      Manager"
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                      05/30/2002 12:33
                      PM
                      Please respond to
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                      Manager"





Hi again,
 I only use one drive. This is important. Sorry for my
previous mail.

Client Options:

nodename IBM_TEST
ERRORLOGRETENTION       5
PASSWORDACCESS          GENERATE
SCHEDLOGRETENTION       5
SCHEDMODE PROMPTED
TCPB                    32
TCPN                    YES
TCPPORT                 1500
TCPSERVERADDRESS        TSMSERVER
TCPW                    64
TXNB                    1048576
largecommbuf            no

Server Options :

SELFTUNEBUFpoolsize yes
SELFTUNETXNsize yes

COMMmethod TCPIP
COMMmethod SHAREDMEM
COMMmethod HTTP
TCPPort 1500
HTTPPort 1580

LOGPoolsize 2048

LANGuage en_US
DATEformat 1
TIMEformat 1

MIRRORWRITE DB SEQUENTIAL

MSGINTerval 1
MAXSESSIONS 5000
ENABLE3590LIBRARY YES

COMMTIMEOUT 600
IDLETIMEOUT 600

bufpoolsize       262144
tcpwindowsize     64
TXNGroupmax       256
TCPBufsize  32
MOVEBatchsize     1000
MoveSizethresh    500
USELARGEBUFFERS Yes
LOGPoolsize       2048

HW:

FC DISKS ( COMPAQ ARRAY) -> TSM CLIENT TRU64 (4 PROC
and 4GB RAM) -> GIGABIT ETH -> TSM SERVER 1GB RAM AND
1 PROCESSOR -> 3494 with on drive 3590E FC.







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