- Sun Storage Virtual Tape Library VTL User Guide

Automated tape caching
190 VTL User Guide • May 2008 G • 96267
Description:
Thiscomma n d canbeusedinordertoenable,disable,orchangetheAutomated
TapeCac hi n g policy foravirtualtapelibrary.
‐L(‐‐tape‐li brary ‐vid) isthevirtualdeviceIDof thevirtualtapelibrarytobeset.
Set‐t(‐‐tape‐caching‐enable)to1forenableor
0todisable.
Ifthedisable optionisusedallotherargumentswillbeignored.
Theenableoptionmustbeusedinordertosetorchangethetape cachingpolicy.
Timebaseddatamigrationtr igge rs:
‐S(‐‐start‐time)alonecanbeusedtostartdailymigrationsatthetimespecified.
The
defaultvalueis00:00(am)(hh:mm).Whencombinedwithotherdatamigration
triggers,the‐Soptionwillde laythemigrationexecutiontothespecifiedtime.
‐W(‐‐day‐of‐the‐week)canbeusedto star tweeklymigrationsonthespecifiedday
at00:00(am):Sunda y:0,Monday:1,..., Saturday:6.
Thedefaultvalueis‐1.Thi s
optionisig no red ifPolicyBasedtriggersareused.
Policybaseddatamigrationtriggers:
‐b(‐‐trigger‐combine)tellshowtriggerpoliciesarecombined(specifiedby‐e,‐c,‐d).
1‐‐an d;0‐‐or.Thedefaultvalueis1(and).
‐e(‐‐end‐of‐backup)triggers
datamigrationwhenunloadingatapefromadrive
aftersomedataiswritte ntoit.
‐f(‐‐tape‐full) appliesto‐eoptions.Dataismigratedonlyifthetapebecomesfull.
‐c(‐‐disk‐capacity)triggersdatamigrat ionwhendiskusagepercentageisabovethe
globaldiskspacethreshold.
‐d(‐‐days‐old)trigge rsdatemigrationafterdatawasretainedondiskfor(days‐old)
days(upto3650days).
Reclamationtriggers:
‐R(retention‐days)determinesthenumberofdaysvirtualtapeswillbekeptinthe
systembeforetheyaredeleted.
Select‐I(‐‐immediately)andvirtualtapeswill
bedeletedimmediatelyafterdata 
migrationcompletes.
Select‐M(‐‐no ‐more‐space)andvirtualtapeswillbe deleted when diskspaceis
neededtocreate(orexpand)avirtualtape.Thelastusedwillbedeleted.
Select‐N(‐‐ne ver)andvirtualtapeswillneverbedeleted.
Thereclamatio ntriggersare
exclusive.