PRIMECLUSTER Global File Services Configuration and Administration Guide 4.2 (Solaris(TM) Operating Environment)

23.4.5 Notes on Operation of the Quota Function

23.4.5.1 Matching quota data

To enable the quota function for the first time, consistency must be established between the number of user files and the number of blocks used. The processing time required to match quota data depends on the number of files.

A log of the internal quotas file is collected if the quota function is enable, therefore, quota data does not have to be matched even in the event of a system failure.

If the quota function is disabled and the system subsequently updated for any reason (e.g., file creation, deletion), the numbers of files and blocks used by a user do not match the values in the internal quotas file, therefore, additional time is required to match the data if the quota function is enabled again.

Specifically, the sfcquotaon(1M) or mount(1M) takes additional time to complete, therefore, the quota function must not be disabled if possible once it has been enabled.

23.4.5.2 Messages

The kernel Information messages relating to the quota function are assigned message numbers from 0142 to 0147. For details on the kernel information messages, see Appendix E, "List of Messages."

The quota related messages are displayed on the terminal of the relevant user. The messages are not displayed on the console. The messages, however, are stored in /var/adm/messages.

23.4.5.3 Number of blocks in quota function

The number of blocks calculated in the quota function is that of the data area and directories. The number is equal to or less than the value obtained by summing up the numbers of blocks displayed by ls(1), du(1), etc. for each user.

23.4.5.4 Others

Note the following when using the quota function:

• Disk use amount
  1. If possible, the UIDs of users should be consecutive values. If the values are not consecutive, the quota data will contain unused areas. In addition, the quota data may not be a cache hit if accessed and would require real disk I/O that may reduce system performance.
  2. If the quota function is used in an existing GFS Shared file system, check for sufficient free area in the V-data area.

For details, see Section 15.2.6, "quota function."