If the Cache Manager cannot access files or save files that it currently has cached, you can use the cm statservers command to determine if one or more File Server machines are currently inaccessible. The command checks the status of each File Server machine with which the Cache Manager has been in contact. The command does not report the reason that a File Server machine is unavailable, but it does list the names of unresponsive machines.
The Cache Manager classifies as unresponsive any File Server machine that meets the following pair of conditions:
· The Cache Manager has been in contact with the File Exporter running on the machine and needs to contact it in the future (for example, the Cache Manager is holding tokens to data on the machine).
· The File Exporter on the machine is not responding to the Cache Manager's periodic probes (implying that it also is not responding to requests for data).
The Cache Manager does not probe all File Server machines in the local cell; it probes only those File Server machines that house data it has cached. Similarly, the cm statservers command is concerned only with File Server machines that do not respond to the Cache Manager's probes. You can use the command to check the statuses of File Server machines that meet the first of the previous two conditions and reside in the local cell, in a specific foreign cell, or in any cell.
To check the status of each File Server machine with which the Cache Manager has been in contact, issue the cm statservers command:
$ cm statservers [{-cell cellname | -all}] [-fast]
The -cell cellname option specifies the name of a foreign cell whose File Server machines the Cache Manager is to check. The Cache Manager determines the status of each File Server machine with which it has been in contact from the specified cell. Use the -cell option or use the -all option to direct the Cache Manager to check File Server machines in all cells; omit both options to check the status of each File Server machine the Cache Manager has contacted from the local cell only.
The -all option directs the command to check the status of each File Server machine with which it has been in contact, regardless of the cell in which a machine resides. Use the -all option or use the -cell option to specify a specific foreign cell whose File Server machines the Cache Manager is to check; omit both options to check the status of each File Server machine the Cache Manager has contacted from the local cell only.
The -fast option directs the command to display the results of its most-recent probes. The Cache Manager does not probe File Server machines to determine their statuses at the instant the command is issued.
If all of the File Server machines that it probes respond, the Cache Manager displays the following output in response to the command:
All servers are running.
If one or more of the File Server machines that it probes do not respond, the Cache Manager displays the following output:
These server are still down: hostname
where hostname is the name of each File Server machine that fails to respond. In a multihomed server environment, the hostname corresponds to the machine name that the Cache Manager is currently using to access each File Server machine. The output does not contain multiple machine host names for the same File Server machine.
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