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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.

* clean up locking order ==== locking/open files (fs layer) ====

...han a DNS/host name, should be used when configuring client mounts. NFSv3 locking is heavily tied to IP addresses and can break if a client uses round-robin

Locking Protocol: "lock_dlm" Locking Protocol: "lock_dlm"

...uld be added under a sub-level test suite. For instance when adding a new locking test to the ''raw'' directory it should be added in the lock.c file with an

...B provides a clustered database with persistent key-value data storage and locking. Database usage is abstracted out via a generic ''dbwrap'' interface.<br> ...y protocol is also provided as a mechanism for synchronising client state (locking). Key-value data stored in the RADOS back-end inherits the same redundancy

* Freezing the cluster. This includes locking all local tdb databases to prevent any clients from accessing the databases

...ire a number of different races and contentions to exercise the networking locking behaviour. Compared to non-networked code, the amount of errors cases and m

...not designed to cope under such workloads. The database requires extensive locking to maintain consistency and both types of Samba DNS servers are currently r

locking = yes

...mmand. The tool is simply backing up the local files and it has sufficient locking in place to ensure the backup is generated safely.

|Exercise O_DSYNC to check locking when writing

:* [https://bugzilla.samba.org/show_bug.cgi?id=12469 BUG #12469]: ctdb-locking: Explicitly unlock record/db in lock helper. :* [https://bugzilla.samba.org/show_bug.cgi?id=12392 BUG #12392]: ctdb-locking: Reset real-time priority in lock helper.

|Exercise O_DSYNC to check locking when writing

While 4.17 already improved the situation quite a lot, with 4.18 the locking overhead for contended path based operations is reduced by an additional fa

...=13584 BUG #13584]: vfs_fruit: Fix a panic if fruit_access_check detects a locking conflict. ...to an open file or directory in Samba can be queried through the 'net tdb locking' command. In clustered Samba this can be useful to determine the file or di

Bug fixes, including important ones for deferred close (handle leases and locking)

...dern Windows clients and the POSIX file system on which it runs, including locking, Access Control Lists, and case insensitivity. * Locking, such as <code>brlock.tdb</code>, which handles byte-range locking.

...samba.org/show_bug.cgi?id=11934 BUG #11934]: Fix memory leak in share mode locking. :* [https://bugzilla.samba.org/show_bug.cgi?id=11549 BUG #11549]: s3:locking: Initialize lease pointer in share_mode_traverse_fn().

:* [https://bugzilla.samba.org/show_bug.cgi?id=10685 BUG #10685]: s3: smbd: Locking, fix off-by one calculation in brl_pending_overlap(). ...4496]: Samba versions 3.4.0 and above allow the administrator to implement locking out Samba accounts after a number of bad password attempts.

:* [https://bugzilla.samba.org/show_bug.cgi?id=12392 BUG #12392]: ctdb-locking: Reset real-time priority in lock helper. ...samba.org/show_bug.cgi?id=11934 BUG #11934]: Fix memory leak in share mode locking.

:* [https://bugzilla.samba.org/show_bug.cgi?id=10685 BUG #10685]: s3: smbd: Locking, fix off-by one calculation in brl_pending_overlap(). ...4496]: Samba versions 3.4.0 and above allow the administrator to implement locking out Samba accounts after a number of bad password attempts.

...4496]: Samba versions 3.4.0 and above allow the administrator to implement locking out Samba accounts after a number of bad password attempts.

...tps://bugzilla.samba.org/show_bug.cgi?id=14113 BUG #14113]: Fix byte range locking bugs/regressions.

:* [https://bugzilla.samba.org/show_bug.cgi?id=12628 BUG #12628]: s3: locking: Update oplock optimization for the leases era.

...=13584 BUG #13584]: vfs_fruit: Fix a panic if fruit_access_check detects a locking conflict.

..._bug.cgi?id=13584 BUG #13584]: Fix a panic if fruit_access_check detects a locking conflict.

...ial characters commonly used by OS X client (eg '*', '/'), integrated file locking and Mac metadata access with Netatalk 3 and enhanced performance by impleme