Lindsey: I've been walking around once and again about networking configuration, then with disk i/o performance, then with how is configurated on disk the storage pool (if it was in raid 5, or in raid 1 or in raid 10...).
Those servers are connected through gigabit ethernet channels, and they are offering from 50 to 75 MBytes/sec. I believe that throughput is very low, but Tivoli's people (here) insisted in other factors (disk i/o, configuration of raids, etc) I'll try your reccomendation, I have not all neccesary values from our switches now. Thanks Ignacio > -----Mensaje original----- > De: lt [mailto:[EMAIL PROTECTED]] > Enviado el: Miércoles, 15 de Mayo de 2002 19:42 > Para: [EMAIL PROTECTED] > Asunto: Re: Tuning TSM > > > 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 > > >