When performing a backup of a Linux client to a remote backup server, the backup fails with the error message "Timed out waiting for input".
This only appears to fail when writing data from the /var filesystem. What is causing this?
The "Timed out waiting for input" error message is produced by the SBAdmin remote communications utility (strexec) that is responsible for sending backup data to the remote server. The message is displayed, and the backup fails, when strexec has not received data to send to the server for a timeout of 10 minutes. The strexec utility gets data to send to the remote server from the backup process running on the client.
The file /var/log/lastlog is a database which contains information on the last login of each user. It is a sparse file. Therefore, it's size when shown with "ls -l" may display it as very large, but it's size on disk is typically much smaller. The real size can be displayed with "ls -s" or "du -s". Most often it will appear very large if there are system users configured with very high UID's.
1. Exclude /var/log/lastlog from the backup by using an exclude list
2. Recreate or truncrate /var/log/lastlog so it is not so large
3. Peform the backup to a local device on the client (SBDIR, SBNFS, SBTAPE)