Re: BACKUP to TAPE, PERFORMANCE II
2002-05-30 14:09:18
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"
<[email protected]
.EDU>
05/30/2002 12:33
PM
Please respond to
"ADSM: Dist Stor
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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