Let's look at this.... Both servers must be at less than 40% to use Active/Active
Living within those rules, the same implementation on Active/Passive would yield 80%/0% usage. Looks to me like you can get better use out of the two servers by going Active/Passive! And implementing a Single Storage Group with a minimal number of databases is going to reduce the system overhead, increasing the performance yet more. -----Original Message----- From: Sabo, Eric [mailto:[EMAIL PROTECTED]] Posted At: Wednesday, March 13, 2002 11:17 AM Posted To: Microsoft Exchange Conversation: E2k Clustering Subject: RE: E2k Clustering I get to use both of my servers that I purchased. Cause of our budget is so tight and I have get buy. It took me a year to get the following equipment. Don't you think active/active is right for me, since I am below the MS recommendations. Eric Sabo NT Administrator Computing Services Center California University of Pennsylvania -----Original Message----- From: Kevin Miller [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 13, 2002 11:14 AM To: Exchange Discussions Subject: RE: E2k Clustering And what do you plan on gaining from the active active? --Kevinm M, WLKMMAS, UCC+WCA, And Beyond Did I just say that out loud? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Sabo, Eric Sent: Wednesday, March 13, 2002 8:01 AM To: Exchange Discussions Subject: RE: E2k Clustering I talked to compaq/microsoft today, I am confident in our situation here that an active/active is the right choice for us. Currently we have the following: Server no. 1 - Quad Pentium Pro 200 MHZ (very old chipset technology) - 1 MEG cache on each processor - 2 GB RAM: (800 mailboxes/heavy users) The most I ever saw the processor level was at 50% usage, most of the time it is around 10%-20% usage Server no. 2 - dual Pentium III 500 MHZ Xeon Processor - 2 Meg cache on each processor - 2 GB RAM (6000 mailboxes/light users)- The most I ever saw these processors was at 35%, most of the time it is around 5%-10% We are going to the following: Two servers running w2k adv sp2 e2k sp2 - Quad Pentium III Xeon 700 MHZ - 2 MB cache of each processor- 3 GB physical RAM using a Storageworks San solution. I would say these machines should run around 5-10% CPU usage. Eric Sabo NT Administrator Computing Services Center California University of Pennsylvania -----Original Message----- From: Woodrick, Ed [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 13, 2002 9:59 AM To: Exchange Discussions Subject: RE: E2k Clustering Use Active/Passive clusters when possible to increase scalability and reduce failover times. Active/Active clusters are only supported in 2-node configurations in which each node has a maximum of 40 percent loading and 1900 simultaneous users. "Microsoft Exchange 2000 Server Service Pack 2 Deployment Guide" In short, there are NO issues when running in Active/Passive, but when running in Active/Active you have a high chance of a failover failing because of memory fragmentation. Active/Passive is going to provide you with high reliability failover. Active/Active is going to cause grief. Let me turn the tables, why do you think that Active/Active is better than Active/Passive? Ed -----Original Message----- From: Etts, Russell [mailto:[EMAIL PROTECTED]] Posted At: Wednesday, March 13, 2002 9:38 AM Posted To: Microsoft Exchange Conversation: E2k Clustering Subject: RE: E2k Clustering Hi there I was looking over the white paper, and according to Microsoft, both active/passive and active/active are recommended in the below listed whitepaper. Do you have access to information that suggests otherwise?? Thanks Russell -----Original Message----- From: Woodrick, Ed [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 12, 2002 5:51 PM To: Exchange Discussions Subject: RE: E2k Clustering Make it Active/Passive as recommended and it's a moot point. -----Original Message----- From: Sabo, Eric [mailto:[EMAIL PROTECTED]] Posted At: Tuesday, March 12, 2002 5:42 PM Posted To: Microsoft Exchange Conversation: E2k Clustering Subject: RE: E2k Clustering When they talk about concurrent connections, does microsoft mean if one users is using a mapi client that would mean 3 connections there for just one user. Is this correct? Eric Sabo NT Administrator Computing Services Center California University of Pennsylvania -----Original Message----- From: Etts, Russell [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 12, 2002 4:20 PM To: Exchange Discussions Subject: RE: E2k Clustering Hi there According to the MS whitepaper, here are the limits for active / active: "After you deploy your cluster, make sure you do the following: Limit the number of concurrent connection (users) per node to a maximum of 1,900, and proactively monitor the cluster to insure that the CPU does not exceed 40 percent (load generated from users) loading." There is more information in the white paper that will help you. The name is, "Deploying Microsoft Exchange 2000 server service pack 2 clusters". Hope this helps you Russell -----Original Message----- From: Ashby, Andrew [mailto:[EMAIL PROTECTED]] Sent: Monday, March 11, 2002 3:50 PM To: Exchange Discussions Subject: E2k Clustering We are evaluating an Exchange 2000 Active/Active cluster, but I remember an old limitation of 1000 clients per virtual server. In my searching of technet, and other knowledgebase solutions, I have not been able to find this documented anywhere. Is there a technical limit to the number of clients per virtual server? Proposed hardware: 2 quad processor, 2GB systems connected to SAN via fibre channel. 100MB NIC connections. Roughly 4k users. 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