Prior to my last migration, I was seeing an SIS of 5-6 for most servers in a
similar configuration, as well.

------------------------------------------------------
Roger D. Seielstad - MCSE
Sr. Systems Administrator
Inovis - Formerly Harbinger and Extricity
Atlanta, GA


> -----Original Message-----
> From: Ed Crowley [mailto:[EMAIL PROTECTED]] 
> Sent: Wednesday, October 09, 2002 1:20 PM
> To: Exchange Discussions
> Subject: RE: SIS and English
> 
> 
> The customer with whom I am working at present has a SIS of 6 to 7 on
> each of four primary mailbox servers, and they don't even attempt to
> collect workgroups onto the same server.
> 
> Ed Crowley MCSE+I MVP
> Technical Consultant
> hp Services
> "There are seldom good technological solutions to behavioral 
> problems."
> 
> 
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]] On Behalf Of 
> Roger Seielstad
> Sent: Wednesday, October 09, 2002 5:53 AM
> To: Exchange Discussions
> Subject: RE: SIS and English
> 
> 
> Actually, it's the average number of references per message in the
> store, and therefore you can extrapolate the amount of storage space
> saved by SIS.
> 
> Therefore, stores with an SIS of 3 mean an average of 3 references per
> message. I find it rare to see SISs less than 2, unless there is very
> little intraoffice email exchanged.
> 
> ------------------------------------------------------
> Roger D. Seielstad - MCSE
> Sr. Systems Administrator
> Inovis - Formerly Harbinger and Extricity
> Atlanta, GA
> 
> 
> > -----Original Message-----
> > From: Gary Barnett [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, October 08, 2002 5:54 PM
> > To: Exchange Discussions
> > Subject: RE: SIS and English
> > 
> > 
> > Sounds to me that if x messages exist in the store and y 
> messages are 
> > duplicates, then the ratio can be expressed as a percentage of 
> > messages that are singly stored.
> > 
> > Note that the number of bytes saved is not included in the
> > calculation, hence
> > the result says nothing about the number of bytes saved.
> > 
> > I suppose you are supposed to assume that all the dups are 
> copies of 
> > forwarded jokes, MP3 and other large attachments, rather than 500 
> > copies of "To the loser who stole my pen, please return it, ASAP!"
> > 
> > --Gary
> > 
> > 
> > -----Original Message-----
> > From: Mark Hanji [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, October 08, 2002 2:36 PM
> > To: Exchange Discussions
> > Subject: SIS and English
> > 
> > 
> > First, cool subject :-)
> > 
> > Ex5.5, perfmon on MSexchangeIS private.
> > I look at the "Single Instance Storage Ratio" counter and
> > wonder: Does the
> > word "ratio" means like the English "ratio" word, or it means 
> > actually how
> > much data I save because I am using SIS?
> > 
> > Idiot Question? Look at :Q160178
> > 
> > ==============================================================
> > ==============
> > ========
> > Single Instance Ratio:
> > 
> > The ratio between the total number of message references and
> > the total number
> > of messages stored in the information store. This ratio 
> > indicates the amount
> > of storage saved by single instance storage.
> > ==============================================================
> > ==============
> > =========
> > 
> > The first sentence talks about ratio, which means some kind
> > of mathematical
> > relation. The second sentence talks about a permanent number 
> > - "amount of
> > storage".
> > 
> > Well?!
> > 
> > 
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