Hello Ignacio, I had performance problems with TSM too. (I still have in another installation too :p) ... After fixing the networks problems (to 100/full duplex) performance was still poor. I don't know what version you are using but in my case I had to change the TCPWINDOWSIZE in the client options file to 63 (default is 32) , and now I'm backing up 11 GB in 1 hour which is pretty good ...
Hope it helps Sandra --- Ignacio Vidal <[EMAIL PROTECTED]> wrote: > 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: Miircoles, 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. > > > > > > I4ve 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 > > > > > __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com
