[Darshan-users] Cannot create log directory

[Snyder, Shane]

No worries, Jeff -- we could have helped you out by outputting a more helpful error message in what is likely a common mistake 🙂

For log directory permissions, just make sure the root log directory has read+execute permissions set for anyone who will be creating logs in it. The 'darshan-mk-log-dirs' will make sure all the subdir permissions are correct.

Thanks
--Shane
________________________________
From: Jeffrey Layton <laytonjb at gmail.com>
Sent: Tuesday, May 19, 2020 6:50 AM
To: Snyder, Shane <ssnyder at mcs.anl.gov>
Cc: darshan-users at lists.mcs.anl.gov <darshan-users at lists.mcs.anl.gov>
Subject: Re: [Darshan-users] Cannot create log directory



On Tue, May 19, 2020 at 11:49 AM Jeffrey Layton <laytonjb at gmail.com<mailto:laytonjb at gmail.com>> wrote:


On Mon, May 18, 2020 at 10:17 PM Snyder, Shane <ssnyder at mcs.anl.gov<mailto:ssnyder at mcs.anl.gov>> wrote:
Hi Jeff,

I just had to try it out to remind myself, but 'darshan-mk-log-dirs' does currently expect the root log directory (i.e., the log path you passed to '--with-log-path' config argument, '/usr/local/darshan-logs' in your case) to be already created outside of the script. That is a little confusing given the name of the utility, in that you'd probably expect it to gracefully handle the case where the root doesn't already exist... I just created an issue to ensure we make the errors more clear in why the script fails, and will probably also just modify the script to create the root if it doesn't exist -- I don't see any reason why it shouldn't already be doing that.

Thanks for the reply! I apologize for not thinking of the need for the existence of the root directory - I should have caught that.

Oops - one quick question. What permissions do you recommend for the root directory?

Thanks!


Thanks again!

Jeff


Thanks!
--Shane
________________________________
From: Darshan-users <darshan-users-bounces at lists.mcs.anl.gov<mailto:darshan-users-bounces at lists.mcs.anl.gov>> on behalf of Jeffrey Layton <laytonjb at gmail.com<mailto:laytonjb at gmail.com>>
Sent: Monday, May 18, 2020 3:06 PM
To: darshan-users at lists.mcs.anl.gov<mailto:darshan-users at lists.mcs.anl.gov> <darshan-users at lists.mcs.anl.gov<mailto:darshan-users at lists.mcs.anl.gov>>
Subject: [Darshan-users] Cannot create log directory

Good afternoon,

I have a small problem when I build Darshan. It doesn't create the log directory, so I used the script darshan-mk-log-dirs.pl<http://darshan-mk-log-dirs.pl>. However, I get an error:

# ./darshan-mk-log-dirs.pl<http://darshan-mk-log-dirs.pl>
Error: could not mkdir /usr/local/darshan-logs//2020.

This is an Ubuntu system I used sudo to run the script and I also tried as root. In either case, I get the same result.

While I can follow the Perl script (it's been a few years since I last coded in Perl), I want to make sure I track down the cause of this error.

Thanks!

Jeff


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