Acopia Networks 810-0044-00 Manual de instalación descargar pdf (Pagina 357)

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101

Policy for Balancing Capacity

Adding a Share Farm

CLI Storage-Management Guide 12-23

bstnA6k(gbl-ns-vol-sfarm[ns2~/usr~fm4])# constrain-files

bstnA6k(gbl-ns-vol-sfarm[ns2~/usr~fm4])# ...

Distributing New Files

Use the no form of the constrain-files command to balance new files in the current

share farm. With this (default) setting, the ARX uses the new-file balancing algorithm

set with one of the

balance commands:

no constrain-files

For example:

bstnA6k(gbl)# namespace ns2

bstnA6k(gbl-ns[ns2])# volume /usr

bstnA6k(gbl-ns-vol[ns2~/usr])# share-farm fm4

bstnA6k(gbl-ns-vol-sfarm[ns2~/usr~fm4])# no constrain-files

bstnA6k(gbl-ns-vol-sfarm[ns2~/usr~fm4])# ...

Constraining New Directories

By default, an enabled share farm distributes all new directories by following the

balance rule. You can instead constrain any new directory to the same share as its

parent. The

constrain-directories command imposes this constraint.

This only makes sense in a share farm where you constrain new files, too. If new-file

balancing is enabled and a client creates several new files in the same directory, that

directory must be copied onto each share that receives any of the new files. This is

called striping the directory. The

constrain-directories command cannot prevent this;

in this case, it only determines which share has the master copy of the directory.

The

auto-migrate rule generally causes less striping than the balance rule, so it can

co-exist with constrained directories.

From gbl-ns-vol-sfarm mode, use the

constrain-directories command to constrain new

directories to the same share as their parent directories:

constrain-directories

For example, the following command sequence causes all new directories in the

ns2~/usr~fm4 share farm to remain in the same shares as their parent directories:

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Acopia Networks 810-0044-00 Manual de instalación Pagina 357

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