HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 136

Advanced mount options, Advanced, Shared, Exclusive, Ordered, Enable Cluster-Coherent Record Locks.

Page 136 highlights

Advanced mount options Click Advanced on the Mount Filesystem window to see the additional options. The advanced mount options are as follows: Shared or Exclusive. Either allow all servers having physical access to the filesystem to mount it or allow only one server. Shared is the default. Ordered or Unordered. The Ordered option provides additional security for writes to the filesystem. 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. The default is Ordered. Enable Cluster-Coherent Record Locks. Cluster-coherent record locking is enabled by default. To disable cluster-coherent locking on all nodes in the cluster, remove the checkmark from Enable Cluster-Coherent Record Locks. NOTE: 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. Custom Mount Options: Specify any custom mount options, separated by commas. 136 Configure PSFS filesystems

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Advanced mount options
Click
Advanced
on the Mount Filesystem window to see the additional options.
The advanced mount options are as follows:
Shared
or
Exclusive
. Either allow all servers having physical access to the filesystem
to mount it or allow only one server. Shared is the default.
Ordered
or
Unordered
. The Ordered option provides additional security for writes
to the filesystem. 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. The default is Ordered.
Enable Cluster-Coherent Record Locks.
Cluster-coherent record locking is enabled by
default. To disable cluster-coherent locking on all nodes in the cluster, remove the
checkmark from
Enable Cluster-Coherent Record Locks
.
NOTE:
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.
Custom Mount Options:
Specify any custom mount options, separated by commas.
Configure PSFS filesystems
136