08-03-2006
currently i cannot post actual output as we dont have this problem now.
we killed almost all the processes running on the machine,
to be able to make some links to another disks.
right after killing the processes we observed that,
output of df , rapidly decreased and came to a value very close to
output of du.
this may be a coincidence.
but another possibility is that the processes may allocate some temporary space
in the disks, because there were lots of long-time running processes which are doing heavy operations on database and also on unix files.
does it make sense?
i will send the actual outputs if the problem occurs again.
thanks for your concern...
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QUOTA(1) BSD General Commands Manual QUOTA(1)
NAME
quota -- display disk usage and limits
SYNOPSIS
quota [-ghu] [-v | -q]
quota [-hu] [-v | -q] user
quota [-gh] [-v | -q] group
quota -d [-gh] [-v | -q]
DESCRIPTION
quota displays users' disk usage and limits. By default only the user quotas are printed.
Options:
-d Query the kernel for default user or group quota instead of a specific user or group.
-g Print group quotas for the group of which the user is a member. The optional -u flag is equivalent to the default.
-h Numbers are displayed in a human readable format.
-q Print a more terse message, containing only information on file systems where usage is over quota.
-v quota will display quotas on file systems where no storage is allocated.
Specifying both -g and -u displays both the user quotas and the group quotas (for the user).
Only the super-user may use the -u flag and the optional user argument to view the limits of other users. Non-super-users can use the -g
flag and optional group argument to view only the limits of groups of which they are members.
Only the super-user may use the -d flag.
The -q flag takes precedence over the -v flag.
quota tries to report the quotas of all mounted file systems. If the file system is mounted via NFS it will attempt to contact the
rpc.rquotad(8) daemon on the NFS server. If quota exits with a non-zero status, one or more file systems are over quota.
SEE ALSO
libquota(3), fstab(5), edquota(8), quotacheck(8), quotaon(8), repquota(8), rpc.rquotad(8)
HISTORY
The quota command appeared in 4.2BSD.
BSD
May 12, 2012 BSD