tag:blogger.com,1999:blog-3179219424167705024.post5702581002983020707..comments2024-03-21T00:12:28.185-07:00Comments on M365 and AZURE Blog: BES and Worker-TreatsOz Casey, Dedealhttp://www.blogger.com/profile/12226180672457689907noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3179219424167705024.post-41634324388102733992007-12-21T18:37:00.000-08:002007-12-21T18:37:00.000-08:00Thanks Howie, nice to get detailed information as ...Thanks Howie, nice to get detailed information as always. Marry Xmas and happy holidays<BR/>OzOz Casey, Dedealhttps://www.blogger.com/profile/12226180672457689907noreply@blogger.comtag:blogger.com,1999:blog-3179219424167705024.post-31515092828801700722007-12-21T08:38:00.000-08:002007-12-21T08:38:00.000-08:00One key thing to note here is that the 3-4 times m...One key thing to note here is that the 3-4 times more traffic than a regular MAPI user isn't an "apples to apples" comparison, but rather comparing an Outlook Cached-Mode client to a BES user (which is a non-cached MAPI connection).<BR/><BR/>To go into a bit more depth ...<BR/><BR/>Each BES will start up by default 5 dynamic mailbox agents ... each mailbox agent has a maximum of 100 MAPI threads and a maximum of 5 threads per pool. As the number of handhelds on a BES increase ... the ratio of users per thread increase, which generates a higher load on Exchange. The key is to minimize the number of Exchange servers interacting with BlackBerry servers ... and if you have multiple of each doing load balancing you're better off keeping a 50/50 load of bes / exchange users across each server than an 80/20 distribution.<BR/><BR/>As a general rule we try to allocate no more than 5 exchange servers to a single BES ... giving each mailbox agent only one mail server to deal with. obviously this'll change with quantities of users, but in general you're better off with 2 servers interacting with 5 Exchange servers each than BES interacting with 9 Exchange servers and the other interacting with just 1.<BR/><BR/>Happy BES'ing!Howiehttps://www.blogger.com/profile/12062490158559085118noreply@blogger.com