On 18/04/2011 17.19, Vincent Fox wrote: > What web-based client? Why would you expect it to die? It is Open Xchange. Some users do not organize messages in folders, just leave everything in the INBOX. So, depending on the (web)client implementation, such a huge number of items can be a performance hog. For example OX has a cache of some thousand message headers to make scrolling smooth. If items in the folder are more than the cache can hold, an IMAP LIST is issued at every scrollbar movement... I have seen Thunderbird choke on a Premier Gmail account with some thousands of messages in one folder/label. But that might have well been cause by a slow server response. > As to SAN, this maybe related..... > > We have found netbackup on large Cyrus mail-store volumes are a Curiously I read your reply after greeting Symantec's sales team that paid us a visit! So I am now studying netbackup7 on my own. Thank you for the insight in the problems you're running. I will talk with the storage guys here so check how our product is expected to cope with many small files (well, it is already doing it with the existing email infrastructure anyway). Paolo ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/