File locks
Jump to navigation
Jump to search
Some app may use file locks for synchronization. Generally they will use flock or POSIX file locks, which were achieved by flock
or fcntl
system calls. For dump/restore, it is hard to be handled perfectly, because we can't guarantee all potential users are dumped for a specific file lock. Right now, we assume that all file lock users are taken into dump, and the --file-locks
option should be used on both dump and restore stages if our app may use any file locks. Remember that file locks dump/restore can only be absolutely safe for container dumping (as a container, naturally, contains all the file locks users).
Currently supported lock types are:
flock()
locks- POSIX (
fcntl
) locks
In future releases, we plan to also support:
- file leases
- OFD locks
- mandatory locks