Probably. Empirical evidence is best and you now have plenty of that. I have never seen compression improve backup times.
Kelly J. Lipp Storage Solutions Specialists, Inc. PO Box 51313 Colorado Springs, CO 80949 [EMAIL PROTECTED] or [EMAIL PROTECTED] www.storsol.com or www.storserver.com (719)531-5926 Fax: (240)539-7175 -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of John Naylor Sent: Tuesday, January 08, 2002 10:16 AM To: [EMAIL PROTECTED] Subject: Client Compression question Hi. I have been testing Novell backups and restores using a Compaq proliant 8500 as the client box. We have been seeing ok performance of approx 10 gb an hour for backups and restores, of 1 million objects. This applies both to Netware compressed and Netware uncompressed volumes. However when I try TSM client compression on a backup of a netware uncompressed volume, the performance drops to 1 gb. an hour. It is not a resource problem the compaq cpu is hardly stirring, but it is definitely the TSM compression that is taking up the time (TSM tracing shows it as 89% of the total time) I always believed in the past that slow performance with client compression was down to lack of cpu on the client box, but there is cpu to spare with this configuration. My question is :- Is 1 gb an hour the best performance I that I can expect using TSM compression or can anyone think of reasons why that is all I am achieving ? thanks ********************************************************************** The information in this E-Mail is confidential and may be legally privileged. It may not represent the views of Scottish and Southern Energy plc. It is intended solely for the addressees. Access to this E-Mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Any unauthorised recipient should advise the sender immediately of the error in transmission. Scottish Hydro-Electric, Southern Electric, SWALEC and S+S are trading names of the Scottish and Southern Energy Group. **********************************************************************
