While digging through and trying to investigate a file system slowdown that may or may not be IPA related, I noticed an odd thing on my RHEL 5 and 6 based systems, the lastlog file was bloody huge:
-rw-r--r-- 1 root root 469419202628 Jan 3 00:20 /var/log/lastlog Or for those of us who don't count that high . -rw-r--r-- 1 root root 438G Jan 3 00:20 /var/log/lastlog Now really it isn't that big: erinn@uat ~ $ du -sh /var/log/lastlog 64K /var/log/lastlog However, and I am no expert here, some backup programs will choke hard on this file, because it appears all that empty space will actually get nulled out, or at least this is happening to me with Bacula 5.0.2 on RHEL 5. More investigation into this part is necessary though... Now at a guess, this is probably related to this blog post: http://linuxshellaccount.blogspot.com/2007/11/trimming-space-in-var-problem-with.html That article was written for Solaris but it sure seems to be applicable to Linux as well. Though the multiples aren't the same. Frustratingly, this does not seem to be the case with all of my systems, only some of them. I have multiple RHEL 5 and 6 instances exhibiting this issue, and one RHEL 5 system that is not. This is probably a result of IPA choosing ludicrously high UIDs to avoid collisions (which is fine, no bashing here). Can anyone else confirm? Lend more insight? -Erinn
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