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
think about using quotas , as they allow you not only to limit space usage but also limit inodes consumption
example bellow illustrates no space limitation (-) but inode limitation : << romeo user - 1M # one billion inodes romeo user@mail - 50K # 50 hundred files allowed in the qtree mail for the user romeo
You would share this policy with your student in away like : " Oye Oye. You are asked for take care of your mail's INBOX and sub Folders as the number of your mail is limited to 100. Thank you to erase useless mail, save or forward interesting mail in order not to leave your old mail taking space in your mail account..."