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See how deeply locking is used in [[smbd]] code here [http://wiki.samba.org/images/9/91/Get_share_

* How to test if posix locking is supported on the file system? * Does file system provide posix locking semantics (cluster-aware locking)?

...re. I guess that just shows how much filesystem developers tend to neglect locking. ...et a rate of perhaps 500k to 1M locks/second. If ping_pong doesn't print a locking rate once per second then you have a bug. Talk to your filesystem vendor.

...this has not been the case though, — the only case of this automatic file locking is for executables which are being executed (ETXTBUSY error), which is not * open file locking preventing access or modification of a file being open for writing or read.

* the shared information in ''locking.tdb''. It is a set of deferred open entries bound to each file - no more th

so on. So the most problem is the extending of the [[locking]] subsystem information we need to be concerned about is the locking state. There is an

* Locking API to detect deadlocks between ctdb and samba

If the clustered filesystem does not support locking on default, CTDB allows to replace this mechanism with a binary that would

...S interface for BRL calls. Call into OneFS's Windows semantics byte range locking API. || [[zkirsch]] || <font color="green">Completed</font>

....tdb || dbwrap || lock || TDB_CLEAR_IF_FIRST || Byte-range locking information. |g_lock.tdb || dbwrap || lock || TDB_CLEAR_IF_FIRST || Global locking information.

...g|ping_pong]] to ensure that the cluster filesystem supports correct POSIX locking semantics. ...uption if you use a different mapping backend with Samba and GPFS, because locking wilk break across nodes. NOTE: You must also load "fileid" as a vfs object

* locking infos

...esigned to take advantage of advanced network file system features such as locking, Unicode (advanced internationalization), hardlinks, RDMA, DFS (hierarchica

...ba DC. A pretty productive day. Jerry won the stupid act of the day for locking himself out of his Windows Vista VMware session.

...tt> attribute to <tt>"locking_type=3"</tt>. Type 3 uses built-in clustered locking. <tt>-p</tt> : <tt>lock_dlm</tt> is the locking protocol gfs2 uses for inter-node communication.

* Record locking now compares records based on their hashes to avoid scheduling multiple req * The locking code now correctly implements a per-database active locks limit. Whole dat

through the fcntl() byte range locking interface as the core coherence filesystem, but will instead build our own locking and transport layer

...was limited in scalability for large i/o due to locking. Improvements to locking to allow significantly more scalability for large file i/o will be in the 5

* Split up locking.tdb for better scaling of per-file concurrent access * Improved TDB database performance (using robust mutex locking)

* Account lockout: the threshold of unsuccessful login attempts before locking a user out of their account, and the duration they're locked out for.