3.5.1 Matrix Server Command Reference

Chapter 2: mx Commands 72

SUID/ NOSUID

Allow (or do not allow) set-user-id bits and set-group-id bits to take effect.

SUID is the default.

SHARED/ EXCLUSIVE

Either allow all servers having physical access to the filesystem to mount it

or allow only one server.

SHARED is the default.

ORDERED/ UNORDERED

With the ORDERED option, if a metadata operation will allocate user

blocks, the user blocks are written to the filesystem before the metadata is

written. With the

UNORDERED option, the writes can occur in either order.

ORDERED is the default.

CREATEDIR

Create the directory mount point.

localbrlocks

Disable cluster-coherent record locking. This mount option should be

used with extreme caution. When cluster-coherent record lock operations

are disabled, the record locks established against a file in the filesystem by

each node in the cluster are invisible to all other nodes in the same cluster.

Before using this option, ensure that either all processes performing

record lock operations in the affected filesystem are running on the same

single node in the cluster, or that the necessary mutual exclusion

semantics for record locking have been implemented in some other way.

Note that this option affects record locks obtained by the Linux fcntl

system call. The Linux flock system call is not affected.

DBOPTIMIZE

Optimize file access for database data files.

Unmount a filesystem:

mx fs unmount [--persistent] [--active] <filesystem>

ALL_SERVERS|<server> ...

The --persistent argument removes the persistent status from the filesystem

mount. The --active argument unmounts the filesystem now.

Display status information:

mx fs status [--mounted|--unmounted] [--persistent]

[--verbose] [--standard|--snapshots]