PST's store 2 copies of messages (2 different formats, IIRC). Then there is the loss of Single Instance Ratio, which I've rarely seen below 2.
So, 4x is a minimum in my book. ------------------------------------------------------ Roger D. Seielstad - MCSE Sr. Systems Administrator Peregrine Systems Atlanta, GA > -----Original Message----- > From: Smith, Ronni [mailto:[EMAIL PROTECTED]] > Sent: Thursday, June 13, 2002 1:14 PM > To: Exchange Discussions > Subject: question re pst=bad#7 from the faq > > > In the FAQ under PST=BAD reason 7 is "Messages take up more > space in a PST > than in an Exchange store." I seem to be finding that that is > true but I am > finding some of them taking up something like 4 times as much > space which > seems overboard to me. Others only seem to be increasing by > about 30% not > 300% so I'm thinking there must be something odd going on. > Does anyone know > what the range of "more space" is? Or why some folders would > be that much > worse than others? Or do I have screwed up folders in some fashion? > Searching the FAQ didn't find anything specific enough and > searching Technet > I didn't find anything that gave me any quantitative > information. Even the > qualitative information was not as helpful as it seems it > could have been. > Which is to say I couldn't find any indication of what the > causes might be > so that I could see if they applied more in one case than > another. If any > one knows one way or another if a 4x factor is not atypical I would > appreciate the tip. Ditto any tips on the range of "more > space". Or any > suggestions at all really. > > Thanks all, > > Ronni > > > P.S. To save time let me make clear that I am aware that > "disk space costs > are the same". Actually they are not, in that CDs per MB are > still cheaper > than SCSI disk per MB even with a 4x size factor on the pst > file. And I know > pst=bad for many reasons not just number 7, but we are only > using them for > archival (FAQ: PST=Good#2) purposes (many messages with deliverable > documents or what-have-you creates a large mailbox fairly > easily) so the > users have what they sent clients and also what the clients > sent us for when > questions come up again. As they often do. And this is way > cheaper for us > than upgrading to the Enterprise version of Exchange 2000 > would be in order > to get an unlimited store even if disk space weren't an issue. > > _________________________________________________________________ > 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]
