How to use space in /tmp to increase root? Post: 302978614

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Operating Systems Solaris How to use space in /tmp to increase root? Post 302978614 by rbatte1 on Tuesday 2nd of August 2016 04:19:31 AM

08-02-2016

Moderator

I would actually ask the reverse question:-

"What is filling up my root filesystem?"

You might help to answer this reviewing the output from the following:-

Code:

cd /
du -ks *|sort -n

You can then work down the largest directories to get a feel for where the space is used. Perhaps you can move these.

Are you using a volume manager at all on this server (Veritas perhaps?) You would be far better to try to split up and shrink the root filesystem to hold just the OS that you need to boot. Data in the root filesystem, whatever directory path you squirrel it away under, is usually bad as if your application runs away, you can end up with a system that will not boot.

I would suggest that splitting out /var (where most OS logs are written to, along with mail files etc.) /home (user personal files) and /tmp would be good practice.

Can you tell us more about the server disk you have?

Output from df -h and a listing from the volume manager of all the volume groups would be useful. That might be a vgdisplay -v or vxdg list & vxdg free

That said, splitting a root filesystem is not a trivial matter. You will probably have to boot to single-user from media so that it is not in use, then move data around before attempting a shrink if your volume manager allows it.

How critical is the server and it's data? It would be prudent to check you can read your backups before starting anything.

Robin

Last edited by rbatte1; 08-02-2016 at 05:21 AM.. Reason: Added the section about using DU to find the directories using most space

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LEARN ABOUT OSX

quotaoff

QUOTAON(8)						    BSD System Manager's Manual 						QUOTAON(8)

NAME

     quotaon, quotaoff -- turn filesystem quotas on and off

SYNOPSIS

     quotaon [-g] [-u] [-v] filesystem ...
     quotaon [-g] [-u] [-v] -a
     quotaoff [-g] [-u] [-v] filesystem ...
     quotaoff [-g] [-u] [-v] -a

DESCRIPTION

     Quotaon announces to the system that disk quotas should be enabled on one or more filesystems.  Quotaoff announces to the system that the
     specified filesystems should have disk quotas turned off.	The filesystem must be mounted and it must have the appropriate mount option file
     located at its root, the .quota.ops.user file for user quota configuration, and the .quota.ops.group file for group quota configuration.
     Quotaon also expects each filesystem to have the appropriate quota data files located at its root, the .quota.user file for user data, and
     the .quota.group file for group data.  These filenames and their root location cannot be overridden.  By default, quotaon will attempt to
     enable both user and group quotas.  By default, quotaoff will disable both user and group quotas.

     Available options:

     -a      If the -a flag is supplied in place of any filesystem names, quotaon/quotaoff will enable/disable any filesystems with an existing
	     mount option file at its root.  The mount option file specifies the types of quotas that are to be configured.

     -g      Only group quotas will be enabled/disabled.  The mount option file, .quota.ops.group, must exist at the root of the filesystem.

     -u      Only user quotas will be enabled/disabled.  The mount option file, .quota.ops.user, must exist at the root of the filesystem.

     -v      Causes quotaon and quotaoff to print a message for each filesystem where quotas are turned on or off.

     Specifying both -g and -u is equivalent to the default.

     Quotas for both users and groups will automatically be turned on at filesystem mount if the appropriate mount option file and binary data
     file is in place at its root.

FILES

     Each of the following quota files is located at the root of the mounted filesystem.  The mount option files are empty files whose existence
     indicates that quotas are to be enabled for that filesystem.

     .quota.user       data file containing user quotas
     .quota.group      data file containing group quotas
     .quota.ops.user   mount option file used to enable user quotas
     .quota.ops.group  mount option file used to enable group quotas

SEE ALSO

     quota(1), quotactl(2), edquota(8), quotacheck(8), repquota(8)

HISTORY

     The quotaon command appeared in 4.2BSD.

4.2 Berkeley Distribution					 October 17, 2002					 4.2 Berkeley Distribution

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