Red Hat ENTERPRISE LINUX 3 - USING GCC Manuel d'utilisateur télécharger pdf (Page 10)

Stateless Linux

ThetermStatelessLinuxreferstoanumberofcapabilitiesthat

willcombinetocreateanexcitingnewwaytoperformlarge-scalesystemdeploymentand

management.Manyofthefoundationalpieces–suchasNetworkManagerandX-windows

auto-conguration–arebeingprovidedforthersttimewiththereleaseofRedHat

EnterpriseLinux5,andyoucanexpecttoseeadditionalcapabilitiesandmanagement

toolsrolledoutovertime.

StatelessLinuxallowsyoutogaincontrolofthesituationwheremanysystems,serversor

clients,startoutasasingledeploymentbutdivergeovertimeasdifferentupgradesand

applicationsareinstalled.Itallowsyoutodeneasingleshareableimageforgroupsof

systems,largeorsmall.Thisimprovesoverallsystemsecurity,simpliesthemanagement

oflargedeployments,andeasesthedeploymentofnewmachines.Essentially,itallows

hardwaretobecomeinterchangeable,becauseallsystemandapplicationstateis

managedoncentralizedservers.

StatelessLinuxwillbevaluedbycustomerslookingtodeployknowledge-workerdesktop

systemsandcorporatelaptops,aswellasvirtualcomputationorapplicationservers.

Options

RedHatEnterpriseLinux5Desktopisavailablewithtwoexcitingnewoptions:

•Workstation–providessupportforlargerclientsystems,soitiswellsuitedforhigh-

performanceengineeringandtechnicalapplications

•MultiOS–allowsthedeploymentofvirtualizedguestoperatingsystems,sothata

desktopsystemcanrunbothRedHatEnterpriseLinuxDesktopand3rdpartyoperating

systemsatthesametime.





RedHatEnterpriseLinux5representstheresultofconcentrateddevelopmentspread

acrosstheentirecoreproduct,andLinuxkernelenhancementsaccruedfromversion

2.6.9to2.6.18.Thesemyriadincrementalenhancementscombinetoimprovethe

performanceandscalabilityofthesysteminmanyareas.Thefollowingexamplesprovide

aglimpseofthescopeoftheseenhancements.

•EnhancedI/Oschedulersaremodular,per-queue,andswitchableon-the-y.Theypermit

I/Operformancetobeoptimizedonaper-devicebasisaccordingtotherequirementsof

theapplication.

•Anewpipeimplementationusescircularbuffers,whichdelivers30-90%

bandwidthimprovement.

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 What’s New in Red Hat Enterprise Linux 5

manaGeability

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Red Hat ENTERPRISE LINUX 3 - USING GCC Manuel d'utilisateur Page 10