We have installed a new TSM server intended to backup about a dozen Novell Groupwise post offices, totaling around 600GB. These are being directed to IBM Ultrium-TD3 LTO tapes in a FC-attached Spectralogic library. The TSM server is Version 5.3.3.3 running under Solaris 10 (Sunfire V240, 2 1.5G CPUs, 8GB memory). The clients machines are dual-processor 3GHz, 3GB memory running the 5.3.4 version of the Netware client. Client/Server connection is over a GigE VLan. Server options:
COMMmethod TCPIP TCPWindowsize 128 BUFPOOLSIZE 128000 EXPINTERVAL 0 SELFTUNEBUFPOOLSIZE YES TXNGROUPMAX 2048 Client Options: COMMMETHOD TCPip TCPSERVERADDRESS 172.18.16.6 TCPBUFFSIZE 32 TCPWINDOWSIZE 64 TCPPORT 1500 TXNB 2097152 PASSWORDACCESS GENERATE PROCESSORUTILIZATION 100 MEMORYEFFICIENTBACKUP NO Initial test backup of a small (9GB) PO showed a throughput of around 20GB/hour. Subsequent tests have improved to 25-29GB/hour after upping the TXNG and PROCESSORUTILIZATION parms, but this still seems awfully slow for what, to us, seems like a pretty beefy system. The data resides on a NetApp FAS device and we actually backup a snapshot of the PO to avoid having to take Groupwise down. For reasons I won't go into, NDMP was removed as an option when putting this configuration together. Stats show 60%+ Comm. Wait, so I'm assuming this is a client-side or network issue, but I'm at a loss as to what to try next. FTP tests from the client show excellent throughput (200+GB/hour), so I don't believe it's a network issue. We're going to up the client-side TCPW to 128, but I'm not optomistic. Can anyone else out there give me their experiences, performance-wise, with large Groupwise backups and any hints at how to increase this throughput? I'm beginning to think it may be limitations of the Netware OS/client. We're hoping to get near 40GB/hour to make our window. Thanks in advance, Sam Sheppard San Diego Data Processing Corp. (858)-581-9668
