Difference between revisions of "File locks"
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(Created page with "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...") |
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| − | Some app may use file locks for synchronization. Generally they will use flock or | + | Some app may use file locks for synchronization. Generally they will use flock or POSIX file locks, which were achieved by <code>flock</code> or <code>fcntl</code> 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 {{Opt|--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). |
| − | [[Category: | + | Currently supported lock types are: |
| + | * <code>flock()</code> locks | ||
| + | * POSIX (<code>fcntl</code>) locks | ||
| + | |||
| + | In future releases, we plan to also support: | ||
| + | * file leases | ||
| + | * OFD locks | ||
| + | * mandatory locks | ||
| + | |||
| + | [[Category: Plans]] | ||
[[Category: Files]] | [[Category: Files]] | ||
| + | [[Category: API]] | ||
Latest revision as of 10:43, 22 February 2017
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