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- Newsgroups: comp.sys.apollo
- Path: sparky!uunet!munnari.oz.au!metro!maths.su.oz.au!szabo_p
- From: szabo_p@maths.su.oz.au (Paul Szabo)
- Subject: Disk quotas at 10.4: problems
- Message-ID: <1992Sep11.004328.2074@ucc.su.OZ.AU>
- Keywords: quota
- Sender: szabo_p@maths.su.oz.au (Paul Szabo)
- Nntp-Posting-Host: adder.maths.su.oz.au
- Reply-To: szabo_p@maths.su.oz.au (Paul Szabo)
- Organization: Mathematics, University of Sydney
- Date: Fri, 11 Sep 1992 00:43:28 GMT
- Lines: 38
-
-
- I now have a few nodes at SR10.4, so I wanted to try out the fancy new disk
- quota system. I found the following problems with it. In my opinion these
- problems (by themselves or in combination) make the quota system unuseable.
-
- 1) There is a limit of 1024 users in the disk quota table. (This limitation
- is shown by INVOL.) We have well over that many users: some would have to
- miss out. (It seems that a user without a disk quota entry is equivalent
- to having a limit of zero.)
-
- 2) There is no tool to re-build the 'currently-used' table. It seems to me
- that the currently-used values only change when files are created/changed
- (only for users with disk quota entries, and only while quotaon is in
- effect). Creating a quota entry for a user will always see his
- currently-used value start at zero.
-
- 3) There is no command to view one's own disk quota limit and usage. The
- command 'edquota -l' displays the full table; this has implications about
- the privacy of other users, besides the inconvenience of having to use
- 'grep' on the output.
-
- 4) There may be no error messages when exceeding quota. In particular, the
- command 'echo abc > file' would return no error message even though I was
- over my quota (it created an empty file instead: this does not need any
- quota). Similarly the command 'echo abc >> file' would silently fail to
- extend the file. (The commands were run in the /bsd4.3/bin/csh, on a node
- running 10.4; the file was on another node running 10.4 and disk quotas.)
-
- 5) Files can be 'given away', after which they are counted against the new
- owner's quota. This defeats the purpose of the system and allows
- denial-of-service attacks.
-
- Does anyone know a way around these problems? (Would HP fix them if I
- submitted an APR?) I hope they can be fixed, I was really looking forward to
- using disk quotas.
-
- Paul Szabo - System Manager // School of Mathematics and Statistics
- szabo_p@maths.su.oz.au // University of Sydney, NSW 2006, Australia
-