Acopia Networks 810-0044-00 Manual de instalación descargar pdf (Pagina 287)

100

101

Configuring Front-End Services

Configuring NFS

CLI Storage-Management Guide 11-5

Disabling NLM (optional)

The NFS service implements the NFS Lock Manager (NLM) protocol. NLM is a

voluntary protocol that NFS-client applications can use to write-protect a file or file

region. NFS client A can use NLM to lock a region of a file; if clients B and C are also

NLM-compliant, they will not write to that region until client A releases the lock.

While the NFS service is disabled, you have the option to disable NLM.

If multiple NFS services export the same volume, consistently enable or disable NLM

for all of them. This applies to managed volumes as well as direct volumes.

Use the

no nlm enable command from gbl-nfs mode to disable NLM at this NFS

service:

no nlm enable

This prevents the front-end service from answering any NLM requests for file locks;

the CLI prompts for confirmation before doing this. Enter yes to continue.

For example:

bstnA6k(gbl)# nfs acopiaFiler

bstnA6k(gbl-nfs[acopiaFiler])# no nlm enable

Disable Network Lock Manager on acopiaFiler? [yes/no] yes

bstnA6k(gbl-nfs[acopiaFiler])# ...

For commands to view current NLM locks and NLM statistics, refer to the Front-End

Services chapter in the CLI Reference Guide.

This requires careful consideration for an NFS service in front of a direct volume (direct

volumes were described in Chapter 8, Adding a Direct Volume). A direct volume can

offer NLM file locks to its clients, but clients that access the back-end filers directly (not

through the ARX) or through another direct volume are unaware of those locks.

Therefore, direct volumes should not offer NLM unless you are sure that all client access

goes through this volume.

1 2 ... 282 283 284 285 286 287 288 289 290 291 292 ... 491 492

Comentarios a estos manuales

Sin comentarios

Acopia Networks 810-0044-00 Manual de instalación Pagina 287

Comentarios a estos manuales