On Tue, 30 Sep 2003 11:14:21 +0100 David McClelland <[EMAIL PROTECTED]> wrote:
> Hi list, > > Understandably, one of our customers is concerned about the impact of > enabling TSM journaling on his customer-facing performance-critical > production file-server - he asks: > > >> Do you know if there is any risk of performance degradation (i.e. > slower read/write of files) > >> resulting from the interaction between the journaling daemon and the > Win32 API? > > Does anyone have any comments, experiences or statistics that I can get > back to him with on this? I can understand that there might be a > performance hit, what with the extra file I/O and writes to the journal > file, but is this significant or quantifiable, and should he be > concerned? > I think there should not be a real problem. On a number of selectable events (Delete, File Size, last modification timestamp, last access timestamp, Atributes, NTFS security) a event is logged in the TSM journal. The default settings seem logical, and will not give you a lot of overhead. Having the TSM journals on a separate disk will of course help if you have a really busy server... It is not true that on every access to a file an event is logged, so you need not worry to much.... > Many thanks, > > David McClelland > Management Systems Integrator > Global Management Systems > Reuters > 85 Fleet Street > London EC4P 4AJ > > E-mail [EMAIL PROTECTED] > Reuters Messaging [EMAIL PROTECTED] > > > > > -------------------------------------------------------------- -- > Visit our Internet site at http://www.reuters.com > > Get closer to the financial markets with Reuters Messaging - for more > information and to register, visit http://www.reuters.com/messaging > > Any views expressed in this message are those of the individual > sender, except where the sender specifically states them to be > the views of Reuters Ltd. -- Met vriendelijke groeten, Remco Post SARA - Reken- en Netwerkdiensten http://www.sara.nl High Performance Computing Tel. +31 20 592 8008 Fax. +31 20 668 3167 "I really didn't foresee the Internet. But then, neither did the computer industry. Not that that tells us very much of course - the computer industry didn't even foresee that the century was going to end." -- Douglas Adams
