Hi, Be sure to set "ALL" parameters for the nic cards correctly to match the ports on the switches. Ensure that "ALL" 'no options' are set correctly for your environment.
Example: AIX 433_ML_08: 100MB ethernet nic cards have the xmit/recieve buffer pools maxed out 100MB ethernet nic cards have the speed/duplex set to match switch ports 'no options' are set via an /etc/rc.{filename} & called via /etc/inittab via: rctunenet:2:wait:/etc/rc.tunenet > /dev/console 2>&1 #Tune Network Parms example: /etc/rc.tunenet if [ -f /usr/sbin/no ] then thewall=$(/usr/sbin/no -o thewall | awk '{ print $3 }') if [ $thewall -lt 4096 ] then /usr/sbin/no -d thewall else print thewall is set to $thewall - left as is fi /usr/sbin/no -d thewall /usr/sbin/no -d sb_max /usr/sbin/no -o tcp_sendspace=$thewall /usr/sbin/no -o tcp_recvspace=$thewall /usr/sbin/no -o udp_sendspace=64000 /usr/sbin/no -o udp_recvspace=64000 /usr/sbin/no -o net_malloc_police=32768 /usr/sbin/no -o tcp_mssdflt=1452 /usr/sbin/no -o ipqmaxlen=150 /usr/sbin/no -o rfc1323=1 fi print "Network parameters tuned..." By allowing AIX_ML_08 to "figure out" the best settings for thewall/sb_max, no -d thewall/sb_max, I do not have to go thru the issue of calculating it anymore!!! Having gone thru the above scenario, my 100MB ethernet cloud performs at, a minimum, 10MB/sec. A lot of the network traffic is logged at: 11MB/sec. We are now implementing a GIG ethernet network and I am looking forward to working with it as well. HTH. Mr. Lindsey Thomson BLDG:042/2F-065 IMA: 0422F065 11400 Burnet Rd., Austin, TX 78758 off) 512) 823 6522 / (TL) 793 6522 "I never waste memory on things that can easily be stored and retrieved from elsewhere." - Albert Einstein "Blessed is the nation whose God is the Lord" - Psalm 33:12 "Time is a great teacher, but unfortunately it kills all its pupils" - Hector Berloiz On Wed, 15 May 2002, Ignacio Vidal wrote: > Hi: > I'm managing a pretty small TSM installation with 4 RS/6K machines (2 > 6M1 and 2 6H1) running AIX 4.3.3 (ML9). > TSM software consists of the server (running in a 6M1 - 7Gb RAM), and > the clients running in the same machine and on the others. > > I´ve got the following situation: > - the total of data backed up is about 200Gb's, > - 4 servers are connected using gigabit ethernet links (and have 6Gb RAM > and 7Gb RAM each model 6H1 and 6M1 respectively) > - TSM uses a storage pool of 240Gb on FastT500 disks (those are > connected by FC channels) > - TSM uses a 3581 library (LTO) with 1 drive, > > The fact is (for the same set of information): > When I do an archive backup operation with TSM, the time elapsed rounds > 5 hours (TSM writes "right to" the tape). > When I do an incremental backup operation, TSM uses about 6:30hs for it > (TSM writes to storage pool). > > I'm looking for a rational approach to solve this "problem": isn't it > more fast writing to storage pool (disk) that to tape? > > Anyone had the same performance problem? > > Is it really a performance problem? > > I would like some commentaries about this, I can provide some info about > the configuration of TSM and the AIX servers. > > Regards > > Ignacio >