very long log in time

Thread View: comp.sys.cdc

3 messages

[T] Back to Threads [V] Tree View [G] Group Articles

3 total messages Started by baque Philippe BAQUE Fri, 28 Feb 1992 11:19

#155

Author: baque Philippe BAQUE
Date: Fri, 28 Feb 1992 11:19

15 lines
1149 bytes

In our site we have a CD4680 (MIPS machine with R6000 microprocessor) under
EP/IX (enhanced RiscOS system made by Control Data).

We have a strange problem:

* the time spent for login out can be very long for some users (and not for others)
* the time to connect (log in) in a ftp session can be very long...
  It seems to be proportional to the user's position in the /etc/passwd file !!

Is there anybody who has faced the same problem ??
has anybody a solution ??

Thank you in advance

-Philippe

Re: very long log in time

#156

Author: Klaus Steinberger
Date: Sat, 29 Feb 1992 09:45

28 lines
2223 bytes

baque (Philippe BAQUE) writes:
>* the time spent for login out can be very long for some users (and not for others)
>* the time to connect (log in) in a ftp session can be very long...
>  It seems to be proportional to the user's position in the /etc/passwd file !!

It would be interesting, how you resolve references to the paswd file,
did you use files or nis in /etc/vis.conf?

If you use "files", each utilty which gather information from passwd-file,
did have to scan through the passwd-file. If you have a rather large
passwd-file, you would see the difference for users which are at the top,
and those which are at the bottom of the file.

NIS (aka YP) did use dbm files, so a reference to passwd using NIS should
not suffer to the position in the passwd file. But I've seen in the
CDC-Solver, that EP/IX 1.4.2 has a Bug which also give you bad responses
to NIS requests. I did not experience this problem on my system, but I think its
also related to large passwd files. The entry in Solver says, that there
exists a patch, which fixes the most important utilities, and it will be
completly solved in 1.4.3 .

Sincerely,
Klaus Steinberger
--
Klaus Steinberger               Beschleunigerlabor der TU und LMU Muenchen
Phone: (+49 89)3209 4287        Hochschulgelaende
FAX:   (+49 89)3209 4280        D-8046 Garching, Germany
Internet: Klaus.Steinberger@bl.physik.uni-muenchen.de

Re: very long log in time

#157

Author: Frank Grewe
Date: Mon, 02 Mar 1992 16:20

23 lines
1770 bytes

We've experienced it as well and have PSR'd the problem.

There are several things we've found:

-- Position in /etc/passwd does make a difference.

-- If you're using /etc/shadow, you'll:
    - Find FTP to have unbelievably long pauses during login (4-6 mins).
    - Ditto with the POP mail server.
    - "xdap" won't work.

-- Trying to use NIS with /etc/shadow:
    - "Sort of" works, but is not supported by CDC.
    - POP mail server fails.
    - REXECD fails.

So far, the only workarounds we've found are:
    - Don't use /etc/shadow, response varies depending on /etc/passwd position.
    - Above and use NIS, response is fast.

I believe the dismally poor response found when using /etc/shadow is a
critical PSR.  Further, I believe CDC must provide an alternative to NIS for
random access to /etc/passwd that includes support for /etc/shadow.

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads