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Full Discussion: File system full, but not really.
Operating Systems Linux Red Hat File system full, but not really. Post 302521864 by geelsu on Thursday 12th of May 2011 01:08:03 PM
Old 05-12-2011
File system full, but not really.
Hey all,

What do you think mostly happened in the following situation?

I have a Red Hat 5.5 server. Someone, somehow, managed to get two .nfs000.... type files that totaled over a terabyte in size. I removed them and thought things were back to normal. Then I started getting complains from users via a desktop popup they have that /home was full. I ssh'ed to the server and did a df and sure enough the df reported 100% in use. But a du reported only 109 gigs in use. The filesystem is 1.3 Terabytes. I cleaned up a few things and monitored the usage with df. This extra space very rapidly disappeared and df again reported 100%.

So I rebooted. After the reboot df reported only 20% in use and du backed it up. I did notice during the reboot that the hard drive lights were flashing widely which was an indication to me that the RAID 5 was rebuilding itself or doing some sort of QC. It actually took a while for the system to come up and I was getting pdflush timeouts before nash actually started.

Those .nfs files obviously maxed out the filesystem, but why would the system not be able to access it's disk space properly after their removal?

Thanks.
 

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LEARN ABOUT CENTOS

runit-init

runit-init(8)                                                 System Manager's Manual                                                runit-init(8)

NAME

       init - a UNIX process no 1

SYNOPSIS

       init [ 0 | 6 ]

DESCRIPTION

       runit-init is the first process the kernel starts.  If runit-init is started as process no 1, it runs and replaces itself with runit(8).

       If runit-init is started while the system is up, it must be either called as init 0 or init 6:

       init 0 tells  the  Unix  process  no 1 to shutdown and halt the system.  To signal runit(8) the system halt request, runit-init removes all
              permissions of the file /etc/runit/reboot (chmod 0), and sets the execute by owner permission of the file  /etc/runit/stopit  (chmod
              100).  Then a CONT signal is sent to runit(8).

       init 6 tells  the  Unix  process no 1 to shutdown and reboot the system.  To signal runit(8) the system reboot request, runit-init sets the
              execute by owner permission of the files /etc/runit/reboot and /etc/runit/stopit  (chmod  100).  Then  a  CONT  signal  is  sent  to
              runit(8).

EXIT CODES

       runit-init returns 111 on error, 0 in all other cases.

SEE ALSO

       runit(8), runsvdir(8), runsvchdir(8), sv(8), runsv(8), chpst(8), utmpset(8), svlogd(8)

       http://smarden.org/runit/

AUTHOR

       Gerrit Pape <pape@smarden.org>

                                                                                                                                     runit-init(8)
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