Modifying quotas

About modifying quotas  

When you want to change how quotas are being tracked on your storage system, you first need to make the required change to your /etc/quota file. Then, you need to request Data ONTAP to read the /etc/quota file again and incorporate the changes. You can do this using one of the two following methods:

• Resize quotas

  Resizing quotas is faster than a full reinitialization; however, some quota file changes may not be reflected.

• Reinitialize quotas

  Performing a full quota reinitialization reads and recalculates the entire quota file. This may take some time, but all quota file changes are guaranteed to be reflected after the initialization is complete.

  Note
  Your storage system functions normally while quotas are being initialized; however, quotas remain off until the initialization is complete.

When you can use resizing  

Because quota resizing is faster than quota initialization, you should use resizing whenever possible. You can use quota resizing for the following types of changes to the /etc/quota file:

• You changed an existing quota file entry, including adding or removing fields.
• You added a quota file entry for a quota target that was already covered by a default or default tracking quota.
• You deleted an entry from your /etc/quota file for which a default or default tracking quota entry is specified.

  Note
  After you have made extensive changes to the /etc/quota file, you should perform a full reinitialization to ensure that all of the changes become effective.

Resizing example 1

Consider the following sample /etc/quota file:

#Quota Target type                disk  files  thold  sdisk  sfile

#------------ ----                ----  -----  -----  -----  -----

*             user@/vol/cad        50M   15K

*             group@/vol/cad      750M   85K

*             tree@vol/cad          -     -

jdoe          user@/vol/cad/      100M   75K

kbuck         user@/vol/cad/      100M   75K

Suppose you make the following changes:

• Increase the number of files for the default user target.
• Added a new user quota for a new user that needs more than the default user quota.
• Deleted the kbuck user's explicit quota entry; the kbuck user now only needs the default quota limits.

These changes result in the following /etc/quota file:

#Quota Target type                disk  files  thold  sdisk  sfile

#------------ ----                ----  -----  -----  -----  -----

*             user@/vol/cad        50M   25K

*             group@/vol/cad      750M   85K

*             tree@vol/cad          -     -

jdoe          user@/vol/cad/      100M   75K

bambi         user@/vol/cad/      100M   75K

All of these changes can be made effective using the quota resize command; a full quota reinitialization is not necessary.

Resizing example 2

Your quotas file did not contain the default tracking tree quota, and you want to add a tree quota to the sample quota file, resulting in this /etc/quota file:

#Quota Target  type               disk  files  thold  sdisk  sfile

#------------  ----               ----  -----  -----  -----  -----

*              user@/vol/cad       50M   25K

*              group@/vol/cad     750M   85K

jdoe           user@/vol/cad/     100M   75K

bambi          user@/vol/cad/     100M   75K

/vol/cad/proj1 tree               500M  100K

In this case, using the quota resize command does not cause the newly added entry to be effective, because there is no default entry for tree quotas already in effect. A full quota initialization is required.

Note
If you use the resize command and the /etc/quota file contains changes that will not be reflected, Data ONTAP issues a warning.

You can determine from the quota report whether your storage system is tracking disk usage for a particular user, group, or qtree. A quota in the quota report indicates that the storage system is tracking the disk space and the number of files owned by the quota target. For more information about quota reports, see Understanding quota reports.

Resizing quotas  

To resize quotas, complete the following step.

quota resize vol_name

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Part No. 210-01085_B0
File: 8quot15.htm
Last updated: 01-Dec-2005 16:51:45