[mdlug] Quotas. How do they work?

[Robert Adkins II]

Two of the users in question receive hundreds of megabytes of data and also
forward to other users inhouse and out that are also into the hundreds of
megabytes.

This can quickly become an unmanageable situation.

Also... The amount of email and size of files has been increasing
considerably as well.

My archiving activities on job related drives has had to be ramped up
considerably to keep from hitting the drive empty ceiling. What used to take
upwards of 6 to 8 months is now filled up in 3 to 5 months.

Thanks again,
-Rob

 

> -----Original Message-----
> From: Mark Montague [mailto:markmont at umich.edu] 
> Sent: Tuesday, March 29, 2011 11:03 AM
> To: Robert Adkins II
> Cc: mdlug at mdlug.org
> Subject: Re: [mdlug] Quotas. How do they work?
> 
>   On March 29, 2011 10:47 , "Robert Adkins II" <radkins at impelind.com>
> wrote:
> > The reason for holding these users to a quota is important. If I do 
> > not, then they will continue to grow their email storage, 
> > indefinitely. It is literally a teeth pulling operation to 
> > "permanently" remove data from the servers that is 6 years out of 
> > date. So, I'm looking at having to manage inboxes with a 
> potential size of "unlimited".
> 
> That's the same situation that the University of Michigan is 
> in with their main campus-wide IMAP service, actually, and it 
> hasn't caused a problem.  There are no quotas, and the 
> potential size of inboxes is "unlimited".  Most people don't 
> keep tons of mail, and the rate of growth of email storage is 
> entirely manageable.  Keep in mind that while most students 
> will leave after 4-5 years (undergraduate) or 7-9 (Ph.D.)
> -- and mailboxes are deleted around 6 months to one year 
> after someone departs -- most staff and faculty stick around 
> for longer.
> 
> I've included some statistics below that some people may find 
> interesting.
> 
> --
>    Mark Montague
>    mark at catseye.org
> 
> 
> ------------------------------
>   IMAP Usage Summary 2011-03-28
> ------------------------------
> 
> --- total disk data  ---
> 64.84 TB (73.2%) disk used of 88.63 TB total There are 14.93 
> TB left before 90% utilization
> 
> --- total size data  ---
> 61.86 TB total for 85342 users
> 
> average:  760.03 MB
> median:   302.01 MB
> 
> --- user size distribution ---
> under 50MB:   21776  25.52%
> under 200MB:  35850  42.01%
> over 1GB:     18994  22.26%
> over 5GB:      1373   1.61%
> 
> --- aggregate folder sizes ---
> trash:     1259.36 GB  (2.0%)
> SpamBox:    102.29 GB  (0.2%)
> 
> --- usage statistics ---
> active users:    69510 (81.4%) -- read or received mail
> logged in users: 52521 (61.5%)
> disabled users:   5370 ( 6.3%)
> 
> --- client statistics ---
> web users:     41195 (78.4%)  web-only users:        0 ( 0.0%)
> proxy users:   52521 (100.0%)  proxy-only users:  11325 (21.6%)
> gpcc users:        3 ( 0.0%)  gpcc-only users:       1 ( 0.0%)
> 
> --- messages delivered ---
> 10604330 total messages delivered
>    127429 messages delivered to SpamBox ( 1.2%)
> 
> --- total system load ---
> 336284.64 total system load
>       4.84 active user average load
> 
> --- load by process ---
> imap: 295236.43    pop:  18896.48    lmtp:  22151.72
>             87.8%              5.6%               6.6%
> 
> --- total logins ---
> imap: 28561295    pop: 7245908
>           79.8%           20.2%
> 
> 
>