
Stateless Linux
ThetermStatelessLinuxreferstoanumberofcapabilitiesthat
willcombinetocreateanexcitingnewwaytoperformlarge-scalesystemdeploymentand
management.Manyofthefoundationalpieces–suchasNetworkManagerandX-windows
auto-conguration–arebeingprovidedforthersttimewiththereleaseofRedHat
EnterpriseLinux5,andyoucanexpecttoseeadditionalcapabilitiesandmanagement
toolsrolledoutovertime.
StatelessLinuxallowsyoutogaincontrolofthesituationwheremanysystems,serversor
clients,startoutasasingledeploymentbutdivergeovertimeasdifferentupgradesand
applicationsareinstalled.Itallowsyoutodeneasingleshareableimageforgroupsof
systems,largeorsmall.Thisimprovesoverallsystemsecurity,simpliesthemanagement
oflargedeployments,andeasesthedeploymentofnewmachines.Essentially,itallows
hardwaretobecomeinterchangeable,becauseallsystemandapplicationstateis
managedoncentralizedservers.
StatelessLinuxwillbevaluedbycustomerslookingtodeployknowledge-workerdesktop
systemsandcorporatelaptops,aswellasvirtualcomputationorapplicationservers.
Options
RedHatEnterpriseLinux5Desktopisavailablewithtwoexcitingnewoptions:
•Workstation–providessupportforlargerclientsystems,soitiswellsuitedforhigh-
performanceengineeringandtechnicalapplications
•MultiOS–allowsthedeploymentofvirtualizedguestoperatingsystems,sothata
desktopsystemcanrunbothRedHatEnterpriseLinuxDesktopand3rdpartyoperating
systemsatthesametime.
RedHatEnterpriseLinux5representstheresultofconcentrateddevelopmentspread
acrosstheentirecoreproduct,andLinuxkernelenhancementsaccruedfromversion
2.6.9to2.6.18.Thesemyriadincrementalenhancementscombinetoimprovethe
performanceandscalabilityofthesysteminmanyareas.Thefollowingexamplesprovide
aglimpseofthescopeoftheseenhancements.
•EnhancedI/Oschedulersaremodular,per-queue,andswitchableon-the-y.Theypermit
I/Operformancetobeoptimizedonaper-devicebasisaccordingtotherequirementsof
theapplication.
•Anewpipeimplementationusescircularbuffers,whichdelivers30-90%
bandwidthimprovement.
What’s New in Red Hat Enterprise Linux 5
manaGeability
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