Acopia Networks 810-0044-00 Manual de instalación descargar pdf (Pagina 460)

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101

Shadowing a Volume

Configuring a Shadow-Copy Rule (Source Switch)

15-16 CLI Storage-Management Guide

Translating Local SIDs

After all local groups are duplicated on all source and destination filers, you must

configure the shadow-copy rule to translate them. When SID translation is enabled,

the rule finds a file’s group name (such as “doctors”) at the source volume, then looks

up the SID for that group name at the destination filer. This introduces a slight

performance penalty, but it ensures that doctors can access their files on both the

source and shadow volumes. From gbl-ns-vol-shdwcp mode, use the

sid-translation

command to enable SID translations for the current shadow-copy rule:

sid-translation

For example, the following command sequence causes “DRrule” to translate all SIDs:

bstnA6k(gbl)# namespace wwmed

bstnA6k(gbl-ns[wwmed])# volume /acct

bstnA6k(gbl-ns-vol[wwmed~/acct])# shadow-copy-rule DRrule

bstnA6k(gbl-ns-vol-shdwcp[wwmed~/acct~DRrule])# sid-translation

bstnA6k(gbl-ns-vol-shdwcp[wwmed~/acct~DRrule])# ...

Failing On SID-Translation Errors

If a local group at a source filer is not configured at the target, SID translations fail for

that local group. By default, the shadow-copy rule copies the original SID (a binary

number) to the shadow volume’s filer. The Access Control Entry (ACE) with the SID

does not function at the shadow volume, though it is preserved; if the file is copied

back to the source volume later, the SID will still be valid there. This can be useful in

a disaster-recovery application.

To prevent the rule from copying a file that fails its SID translation, use the

fail-on-errors option at the end of the command:

sid-translation fail-on-errors

For example:

bstnA6k(gbl)# namespace insur

bstnA6k(gbl-ns[insur])# volume /claims

bstnA6k(gbl-ns-vol[insur~/claims])# shadow-copy-rule insurDR

bstnA6k(gbl-ns-vol-shdwcp[insur~/claims~insurDR])# sid-translation fail-on-errors

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