The following section provides information on some of the troubleshooting scenarios related to backup:
Backup Failures
|
Backup fails |
The subclient content might have remote scripts with one or more blank lines at the top. Ensure that you delete the blank lines at the top of any remote scripts. |
|
Backup fails immediately |
Ensure that the CVOV_LAUNCHD service is running on the OpenVMS client. If the backup fails even with the service running, stop the CVOV_LAUNCHD service using CVOV_STOP.COM and run the backup again. |
|
Backup hangs indefinitely |
Ensure that the ssh is working properly from the proxy to the OpenVMS client. Ensure that there is no firewall between the OpenVMS client and the proxy. Ensure that the user name and password for OpenVMS client are valid. |
Troubleshooting Performance Issues
If you are experiencing performance issues during backup, you can troubleshoot them by enabling logging of performance details in the log files on the access node. These performance counters contain information that help in resolving the performance related issues during backups.
The performance counters printed in the log files include:
|
FileRead |
Average time spent in system call to read the file. |
|
CheckFileHole |
Average time spent to verify if buffer read from the disk is a hole. |
|
Close File |
Average time spent in system call to close the file. |
|
AllocBuffer |
Average time spent waiting for the network buffer. |
|
WriteBuffer |
Average time spent in sending the network buffer to the network. |
|
Disk Read |
Average speed of reading from the disk. |
|
Write |
Average speed of writing to the network. |
Displaying performance details of a backup job
Procedure
-
From the CommCell Console, navigate to Client Computers.
-
Right-click the <Proxy Client>, and then click Properties.
-
On the Client Computer Properties for <Proxy Client> dialog box, Click Advanced.
-
On the Advanced Client Properties dialog box, click the Additional Settings tab.
-
Click Add.
-
On the Add Additional Settings on Unix Client dialog box, perform the following:
-
In the Name box, type clBackupChild_PERF. The Category and Type details are automatically populated.
Alternatively, you can click Lookup and search for the additional setting using the Find box.
-
In the Value box, type Y.
-
Click OK.
-
-
Click OK to close the Advanced Client Properties dialog box.
-
Click OK to close the Client Computer Properties for <Proxy Client> dialog box.
Displaying performance details for each file in a backup job
In addition to viewing the performance details for a backup job on the access node , you can also view the performance details of each file in the backup job. Note that the file names are not printed in the log.
Procedure
-
From the CommCell Console, navigate to Client Computers.
-
Right-click the <Proxy Client>, and then click Properties.
-
On the Client Computer Properties for <Proxy Client> dialog box, Click Advanced.
-
On the Advanced Client Properties dialog box, click the Additional Settings tab.
-
Click Add.
-
On the Add Additional Settings on Unix Client dialog box, perform the following:
-
In the Name box, type clBackupChild_PERF_FILE. The Category and Type details are automatically populated.
Alternatively, you can click Lookup and search for the additional setting using the Find box.
-
In the Value box, type Y.
-
Click OK.
-
-
Click OK to close the Advanced Client Properties dialog box.
-
Click OK to close the Client Computer Properties for <Proxy Client> dialog box.
Note
This setting should be used together with the clBackupChild_PERF additional setting.