My theory is that, at least at the current stage of the technology, clustering could actually decrease your reliability.
Chris, ask you boss what specific benefits he is expecting to get from clustering. Then we can go from there. Ed Crowley MCSE+I MVP Tech Consultant Compaq Computer "There are seldom good technological solutions to behavioral problems." -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Dupler, Craig Sent: Thursday, January 17, 2002 9:47 AM To: Exchange Discussions Subject: RE: Clustering Exchange You should benchmark your reliability. Work with your vendors to determine exactly what your current configuration will deliver in terms of: - mean time between data loss events Your first supporting table for this statistic should look like a seismic event map so you can project not just the frequency of an event, but the frequency of events of various magnitude. You need a second supporting table for this statistic should list all of the probable causes of data loss events, and their relative probability. - mean time between single server outages You need the same accompanying table showing the projected recovery times, assuming that you project that some outages will be more severe than others. You need the same second supporting table listing causes in order of probability. - mean time between total system outages You need the same accompanying table showing the projected recovery times, assuming that you project that some outages will be more severe than others. You need the same second supporting table listing causes in order of probability. Once you have all of this data in hand, and NOT BEFORE, then you have the data that you need to propose various procedural changes and technical upgrades, and you can project with a high degree of accuracy exactly how much additional reliability you will get for a given investment. After that, it is a simple business decision. Any other approach is simply playing with toys and making wild unsupported guesses. But hey, playing with clustering technology can be fun, even if it does drive down your reliability due to guaranteeing an increase in both system outages and data loss events, both deriving largely from sys admin error rates increasing due to the added complexity. -----Original Message----- From: Callan, Chris [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 17, 2002 9:34 AM To: Exchange Discussions Subject: Clustering Exchange My immediate supervisor mentioned that when we finally get new Exchange Servers that we should have them clustered. Now I have never clustered servers before and wouldn't know how to start, but I just wanted to get everyone's opinions on the subject to begin with. How hard is it to do, and how is it to maintain. What are the pro's and con's. Any help would be appreciated. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
