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Flexible Installation Options

System Resource Controller (SRC)

Logical Volume Manager (LVM)

File System Management

Device Coniguration

Comman!s or System "!ministrators

"I# oers migrationas a met$o! o moving to a ne% release or version o t$e

operating system %$ile maintaining your system coniguration an! userconiguration !ata& Migration installations preserve t$e root volume group an!user volume groups& 'e% user coniguration iles are eit$er merge! or save!%$en up!ate!& Save! iles can t$en be replace! by eit$er t$e ne% or existingiles to a separate !irectory or t$e user to merge %it$ existing iles an! continueusing existing iles or save existing iles to a separate !irectory %$ile ne%coniguration iles are intro!uce! an! teste!&

ra!itionally bac*ups $ave store! !ata on $ar! !is*s& I you $ave a CD %riter

an! associate! sot%are "I# gives you t$e option o bac*ing up your system toCD& Compare! to ot$er bac*up me!ia CDs are portable c$eap an! $ig$lyreliable&

+ou can create a bootable root,volume group bac*up or user,volume group

bac*up& In a!!ition to system recovery bac*ups can be use! to install a!!itional systems

%it$ t$e same image as t$e system t$at %as originally bac*e! up (calle! cloning)or to create a customi-e! installation CD or ot$er mac$ines&

+ou can use generic "I# bac*ups coni!ently on ot$er RS./000 mac$ines

%it$out regar! to $ar!%are options&

+ou !on1t $ave to restore an entire bac*up& +ou can list t$e contents o a system

bac*up an! c$oose to restore only selecte! iles on a running system&

$e 'et%or* Installation Manager ('IM) lets you centrali-e installation a!ministrationor multiple mac$ines an! sc$e!ule t$ose installations to minimi-e !isruptions an!inconvenience&

+ou can c$oose to install all net%or*e! mac$ines at t$e same time or staggert$ose installations&

2it$in 'IM you can remain at your console %$ile installing "I# on remote

mac$ines& +ou can even run typical installations unatten!e!&

+ou can install eac$ mac$ine %it$ uni3ue options or install all mac$ines %it$

consistent options&

+ou can ma*e a system bac*up to a 'IM server using t$e mksysbcomman!

an! use t$at bac*up to install anot$er mac$ine (cloning)&

$e Logical Volume Manager (LVM) allo%s logical volumes to span multiple p$ysicalvolumes& Data on logical volumes appears to be contiguous to t$e user but mig$t notbe contiguous on t$e p$ysical volume& $is allo%s ile systems paging space an!ot$er logical volumes to be resi-e! or relocate! span multiple p$ysical volumes an!$ave t$eir contents replicate! or greater lexibility an! availability&

$e Logical Volume Manager (LVM) consists o t$e logical volume !evice !river(LVDD) an! t$e LVM subroutine interace library& $e LVDD is a pseu!o,!evice !rivert$at manages an! processes all I.O& It translates logical a!!resses into p$ysicala!!resses an! sen!s I.O re3uests to speciic !evice !rivers& $e LVM subroutine

interace library contains routines t$at are use! by t$e system managementcomman!s to perorm system management tas*s or t$e logical an! p$ysicalvolumes o a system& $e programming interace or t$e library is available to anyone%$o %is$es to expan! t$e unction o t$e system management comman!s or logicalvolumes&

4eneits t$at t$e LVM oers are5

Continuous !ata usage in t$e event o a !rive ailure5 Mirroringis t$e process o

%riting !ata to t%o or more !rives simultaneously& $is allo%s or continuous !atausage s$oul! one !rive ail& LVM allo%s you to mirror t$e root volume group&

Sprea! I.O over multiple !is*s5 Disk Stripingallo%s you to sprea! I.O or large

rea!s an! %rites over multiple !is*s an! allo%s or simultaneous rea! operations&

Dynamically gro% ile systems5 Management tools allo% you to a!! an! remove

mirrors online %it$out !ata interruption&

"ccess a volume group rom more t$an one location using a concurrent access

volume group&

" ile system is a complete !irectory structure inclu!ing a root !irectory an! anysub!irectories an! iles beneat$ t$e !irectory& File systems are conine! to a singlelogical volume& Some o t$e most important system management tas*s $ave to !o%it$ ile systems speciically5

"llocating space or ile systems on logical volumes

Creating ile systems

Ma*ing ile system space available to system users

Monitoring ile system space usage 4ac*ing up ile systems to guar! against !ata loss in t$e event o system ailures

Maintaining ile systems in a consistent state&

$e native ile system type is calle! t$ejournaled file system(6FS)& $is ile systemuses !atabase 7ournaling tec$ni3ues to maintain its structural consistency preventing!amage to t$e ile system %$en t$e system is $alte! abnormally& It supports t$eentire set o ile system semantics&

Some o t$e beneits o a 7ournale! ile system inclu!e5

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Isolate part o t$e ile tree to %or* on5 8ac$ 7ournale! ile system resi!es on a

separate logical volume& $e operating system mounts 7ournale! ile systems!uring initiali-ation& $is multiple ile system coniguration is useul or systemmanagement unctions suc$ as bac*up restore an! repair because it isolates apart o t$e ile tree so t$at you can %or* on it&

Minimi-e %aste! space5 $e bloc* si-e or an en$ance! 7ournale! ile system

(6FS9) is speciie! !uring its creation& Smaller bloc* si-es minimi-e %aste! !is*space by more eiciently storing t$e !ata in a ile or !irectory1s partial logicalbloc*s&

Contiguous storage5 6FS is an extent,,base! ile system allo%ing !ata to be

store! in a more contiguous manner& Or!ere! storage5 Directory entries are store! in alp$abetic or!er&

I,no!e !irectory storage5 Small !irectory entries are store! !irectly on t$e i,no!e

not on !is*&

Note:6ournale! ile system (6FS) is native to t$e :o%er:C platorman! is not available on t$e I",/; platorm&

Note:8n$ance! 7ournale! ile system (6FS9) is native to I",/;platorm& "lt$oug$ 6FS9 is not native to t$e :o%er:C platorm it isavailable&