> So we use about ten common Intel based servers for BEs (sized to > support loss of 2/3 servers) and store data on NAS. Users are active > and filer is about tens of thousand nfsop/s at the busy hour. > > About 10% to 20% of the users connect at least one time a day, globally > 4 million connections per day. These are quite massive figures -- I'm thoroughly impressed. I am assuming that your back-ends experience 50,000-100,000 concurrent IMAP connections during certain parts of the day. This means that each BE takes 5,000-10,000 parallel connections. Can an ordinary Intel server handle such loads? What's the CPU and RAM of each? Also, how many NAS servers/appliances are being used? I would have thought that something like NFS would be too slow for such heavy IO loads, but evidently I'm wrong. regards, Shuvam ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/
