Specifications

Storage Subsystem Guide

System Drives

Thefilesystemdataredistributionutilityisdesignedtooperatewhenafile

systemisexpandedintonewstorageafterSDshavebeenaddedtoaStorage

Poolwhenthefilesystemisnearlyfull.However,storagemayalsobeadded

toaStoragePoolforotherreasons:

•Toincreaseperformance.

•To

preventthefilesystemfrombecoming100%full.

Toachievethedesiredresultsineitherofthesesituations,youcanusethe

followingprocessafteraddingthestorage(afteraddingtheSDstotheStorage

Pool):

1. Createadummyfilesystem,usingallavailablespace.

2. ExpandtheStoragePoolintothenew

SDs.

3. Expandthealmostfulltargetfilesystemtousesome(orall)ofthespace

addedtotheStoragePool.Notethattheexpansionshouldbeatleast50%

oftheaddedstoragecapacity.

4. Runthefilesystemdataredistributionutility.

5. Deletethedummyfilesystem.

SnapshotsandtheFileSystem

DataRedistributionUtility

Whenthefilesystemdataredistributionutil ityisrunandsnapshotsare

enabled,theolddataispreserved.Asaresult,snapshotswillgrow,

consumingalotofdiskspace.Thespaceusedbythesesnapshotsisnotfreed

untilallsnapshotspresentwhenthefilesystemdata

redistributionutilitywas

startedhavebeendeleted.

Therearefouroptionsavailabletorecoverthespaceusedbysnapshots:

1. Allowthesnapshotstobedeletedaccordingtothesnapshot

configuration.

Thisoptionrecoversspacetheslowest,butcouldbeusedinscenarios

wherethespacewon’tberequiredimmediatelyafterthefile

systemdata

redistributionutilitycompletes.

2. Manuallydeletesnapshotsafterrunningthefilesystemdata

redistributionutility.

Thisoptionrecoversspacemorequicklythanoption1.

3. Manuallykillsnapshotsafterrunningthefilesystemdataredistribution

utility.

Thisoptionalsorecoversspacemorequicklythanoptions1or2,butit

requiresthatthefile

systemistakenoffline.

4. Disablesnapshots(andthereforebackups)andkill/deleteexistent

snapshotsbeforerunningthefilesystemdataredistributionutility.

Thisoptionavoidsthesnapshotspaceusageproblemaltogether.