It doesn't reduce the overhead because the Exchange-based is trying to scan every piece of mail before it gets to the client. In the case of a synch, you are dumping massive amounts of e-mail to a local .ost file. If you have both Exchange and client AV software fighting to get to the same e-mails, guaranteed the Exchange side is going to win, at the expense of the client. It could also depend on the type of AV that is on the server, i.e. is it MAPI-based scanning, or AVAPI. I still don't think I would recommend running Exchange AV on both the server and client, if nothing else, than for the potential to cause problems. Call your Exchange AV vendor and see what they say. You may just be getting lucky.
Ben Winzenz, MCSE Network/Systems Administrator Peregrine Systems, Inc. -----Original Message----- From: Dillon, Jeff [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2001 1:18 PM To: MS-Exchange Admin Issues Cc: '[EMAIL PROTECTED]' Subject: FW: 100% CPU when Synch I'm not sure I buy this analysis...if a LOCAL virus-scanning utility is scanning email hosted on an Exchange system that also has virus software active, the ability of the client machine to request the next item for synchronization is REDUCED by the local overhead of scanning the item. If anything, the local scanning REDUCES the load on the Exchange server by limiting the rate at which the clients can task the server. We run local and server-based Exchange anti-virus software simultaneously, and have seen none of the problems mentioned. I suggest the problem lies elsewhere, and the original comment that "...a FEW of these (clients) are pegging the CPU" is your clue. -----Original Message----- From: Benjamin Winzenz [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2001 1:03 PM To: MS-Exchange Admin Issues Subject: RE: 100% CPU when Synch If you have AV on your Exchange server as well, turn that option off on the clients. Think of it this way. Your Exchange AV program and your desktop AV (NAV-CE) are basically fighting to see who gets to scan the e-mail. Whoever gets to it first locks it and the other one can't get to it. Normally, the Exchange AV program will win. Hence, you have problems on your desktops. Turn it off on the client side, and I bet your problems will go away. It's understandable to want to have it running - heck, our Security team wanted us to turn it on, until we explained to them the hurt it could cause. Ben Winzenz, MCSE Network/Systems Administrator Peregrine Systems, Inc. -----Original Message----- From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2001 12:55 PM To: MS-Exchange Admin Issues Subject: RE: 100% CPU when Synch Yes, with the Outloook\exchange option... -----Original Message----- From: Benjamin Winzenz [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2001 11:55 AM To: MS-Exchange Admin Issues Subject: RE: 100% CPU when Synch With the Exchange/Outlook add-on or no? Ben Winzenz, MCSE Network/Systems Administrator Peregrine Systems, Inc. -----Original Message----- From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2001 12:50 PM To: MS-Exchange Admin Issues Subject: RE: 100% CPU when Synch could be.. we are using NAV CE on all the clients... -----Original Message----- From: Lefkovics, William [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2001 11:48 AM To: MS-Exchange Admin Issues Subject: RE: 100% CPU when Synch Aunty Virus? William Lefkovics, MCSE, A+ ----------------------------------------------------------- Why just ride, when you can fly? http://www.airborne.net ----------------------------------------------------------- Rent this space: [EMAIL PROTECTED] -----Original Message----- From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 19, 2001 9:46 AM To: MS-Exchange Admin Issues Subject: 100% CPU when Synch I have alot Outlook 2000 SP2 clients connecting to an Exchange 5.5 server. A few of these pc's are pegging the CPU at 100% when you force a synchronization with the ost file. This also happens whenever the client itself syncs up with the OST file.. anyone have any ideas? Michael Ross Network Analyst 2 Panduit Corp. [EMAIL PROTECTED] If at first you don't succeed, Skydiving isn't for you. List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
