Groupwise Backup
2006-09-12 14:55:11
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
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