but is that one file or 2K files? the IMAP server i've used (admitedly unix) keep one file which is comprised of all the mail messages. we have one user here with over 4600 mail messages - all in one file that he accesses via IMAP.
-- Lance Not *everything* about the The Borg was bad.
On Tue, Feb 18, 2003 at 03:57:00PM -0500, George Kahler wrote:
I have users (students and staff) that have on average about 2k to 3K email messages in their current mbox folders. (there are some that have 10K, 20k, 30k)
George
On Tue, 18 Feb 2003 12:45:33 -0800, Lance R Bailey baileyla@pmc-sierra.com wrote:
dropped a decimal place, darn sliderule :)
yes, 7.8 mil / 50K students ~= 156 inodes.
but if this is an imap server, each student will only require a minimul amount of files.
-- Lance Fly Air Freud, where the seats recline all the way back to childhood.
On Tue, Feb 18, 2003 at 03:33:01PM -0500, George Kahler wrote:
Ok, so I may be missing something here. I thought that the 7.8 mil / 50K students ~= 156 inodes or files. No ? Isn't one inode equal to one file ?
George
On Tue, 18 Feb 2003 12:18:36 -0800, Lance R Bailey baileyla@pmc-sierra.com wrote:
i'm not sure i follow your math.
250G (or ~250,000,000 K) would give you (25000000K / 32 K/i = ) 7812500i
7.8 million inodes should be enough for 50K students as that is about 156250 files per student.
-- email: lance_bailey@pmc-sierra.com box: Lance R. Bailey, unix Administrator vox: +1 604 415 6646 PMC-Sierra, Inc fax: +1 604 415 6151 105-8555 Baxter Place http://www.lydia.org/~zaphod Burnaby BC, V5A 4V7 The philosophy, as I understand it, is that Linux is a kernel. Full stop. Anything else you add to it is simply a matter of taste and need. -- Brian Ven Der Buhs
On Tue, Feb 18, 2003 at 02:49:19PM -0500, George Kahler wrote:
Hi, I'm about to start a conversion project of our University email system based on mbox folders to Courier IMAP maildir. There are about 50K users using about 250 GB of space on F840 cluster; Netapp version 6.2.2. We have been also told that as of this year each student will keep their account for life, therefore this number will keep on growing.
I'm very concern about the number of inodes/files/volume and the filer performance.
From all the information I could find some of you said that you get
about o one inode for every 32 K o can be increased to as much as 1 inode for every 4 K (maxfiles)
There was also some discussion that when you do this, the internal WAFL tables become so huge that it will impact performance.
32 million / 50 K users gives me only about 650 files; this is clearly not enough.
Will someone having gone thru this type of a conversion give me some pointers of what to do and what not to do ???
Thanks, George
George Kahler e-mail: george@yorku.ca Sr. Systems Administrator humans: (416) 736-2100 x.22699 Computing and Network Services machines: (416) 736-5830 Ontario, Canada, M3J-1P3