Query on JIRA Supported Platforms JIRA 5.2.11

[Sivaz]

As of JIRA 5.2 NFS mounts are not supported due to Lucene requirements.

Although I can see that something is not supported, can someone throw some light on what exactly this implies and what are its implications to existing installations.

We have our attachments and backups stored in NFS drives which are referenced in the application.

TIA

[Radu Dumitriu · Accepted solution]

As far as I remember: NFS has pecularities with file locking. There's an aid named nfslock (or lockd) to implement locking but works like hell.

Specifically, flock ( http://linux.die.net/man/2/flock ) and fnctl( http://linux.die.net/man/2/fcntl ) are implementation dependent. Some flavors of *NIX decided to do lock only locally (!) so the lock does not help you at all. Some implementations have bad performance because they need to negociate the locks with all the clients. That tends to push a lot of UDP packets in the network => sloooowness.

Java still relies on the above routines to perform file locking.

Attachments & backups should be fine, since they are not files that are locked partially, as opposed to Lucene files.