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Glossary
The termsinthisglossary are defined asthey pertaintoIBMSmartCloud
Virtualized Server Recoverydocumentation. If youdo not findthe termyouneed,
refertothe IBMSoftwareGlossary onthe Webat thisaddress:
http://www.ibm.com/ibm/terminology/.You canalso refer to the IBMDictionary
of Computing, NewYork: McGraw-Hill, 1994.
Numerics
10Gb/sLAN. LocalAreaNetwork,offeringuptoamaximumchannelcapacityof10Gb/s.
100Gb/sLAN. LocalAreaNetwork,offeringuptoamaximumchannelcapacityof100Gb/s.
A
AA. TheprefixofaserverprotectedbytheAlwaysAvailableVirtualMachinelevel service.
AlwaysAvailableVirtualMachineservicelevel. Thefastestrecoveryserviceforcritical systems.Thoughsimilarto
theDisasterandTestVirtualMachineservicelevelinmostrespects,itsRTO istypicallylessthan15minutes.
Customerscansubscribeto thisservicelevelonlyasanupgradefromtheDisasterandTestVirtual Machineservice
level.ThegoldservericoninthetreeviewindicatesaserverprotectedattheAlwaysAvailableVirtualMachineservice
level.
authentication. Theprocessofverifyingtheidentityofdevicesorindividualsonanetworkbyelectronicmeans,
includingtheuseofsoftwarelicensenumbers,hardwareserial numbers,userIDs,passwords,encryptionkeys,other
virtuallyunmistakablecredentials,orcombinationthereof.
B
BandwidthEstimator. Anonlinecalculatormadeavailableasaplanningtoolforusebycustomersto estimatetheir
bandwidthrequirementsoncetheIBMSmartCloud VSRserviceisinstalled.Thebandwidthmadeavailablebya
customertoaccommodatetheIBMSmartCloudVSRservicemustconsidercustomers'currentlyavailablebandwidth,
theirnetworkresourcetypes,theirnormaland anticipatedlevelofend useractivity,as wellastheiruniquedisaster
recoverystrategyrequirements.SeeSynchronization&BandwidthEstimator.
bash. Thebourne-againshell.TheGNUcommandinterpreterforUnix.APosix-compatibleshellwithfull Bourne
shell syntax,and somebuilt-inCshell commands.Theshell supportsEmacs-stylecommand-lineediting,jobcontrol,
functions,andon-linehelp.
BCRS. IBMBusinessContinuityResiliencyServices(BCRS).
bitmaparea. Theareaofstoredreference(whichmayexistbothonhierarchicaldirectoryvolumesandinmemory)
toeverypieceofdataintheallocationblocksand indicatingwhethertheblockisallocated orfreeforuse.
bitmapdrive. Thedriveonwhichabitmap imageis located.
bootdiskrestoration. Theactofrestoringorrecoveringasystemusinginformationburned to acompactdisk(CD)
ormountedonavolume.
BusinessContinuityResiliencyServices (BCRS). AdivisionofIBMwhosemissionisassistcustomersto
implementtechnologiesthatoptimizebusinesscontinuity,bettercomplywithregulationsandenablequickrecovery
fromunanticipatedoutageemergencies.
C
cleanup. UndertakenbytheIBM VSRAdministratorfollowingDisasterRecoveryTestreporting,cleanup isa
processtransparentto theuserandCustomerVSRAdministrator.Itinvolvesthefollowing:
v SavingVSRtestresults
©CopyrightIBMCorp.2012
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v DeletingtheDisasterRecoveryVirtualMachinefromtheESXmachine(whenitpersists)
v DeletingtheDisasterRecoveryTestvolumefromtheSAN
cluster. Agroupofcomputers,linkedandworkingtogetherto form,insomerespects,asinglecomputer.The
componentsofaclusterareusuallyconnected toeachotherthroughfastlocalareanetworks.Clustersareusually
deployed toachievebetterperformance,availability,and costefficiencythanasinglecomputerofcomparablespeed
oravailability.
Cluster-ConfigurationFileCreator. AtoolrunduringtheconfigurationofaMicrosoftWindows2008Cluster
whenmovingservicesand applicationsontothenode.
communicationschannels. Amediumthroughwhichamessageistransmitted toits intendedaudience.Seealso:
v 10Gb/sLAN
v 100Mb/sLAN
v DS1
v DS2
v DS3
v OC3
v T1
v T3
consistencygroup. Aconsistencygroupisasetoffilesthatmustbebackedup/replicated/restoredtogetherwith
theprimarydatainorderfortheapplicationto beproperlyrestored.Thesegroupsareusedto minimizeerrorsto
maintaindataconsistencyatarecoverysite.Seecross-consistentreplication.Seealso dependencygroup.
countrycode. Atwo-letterISO3166-1alpha-2conventionuniquelydesignatingasinglenation.
credentials. Verifiablenames,types,addresses,IDs,passwords,serialnumbers,and orlicensesthatattestthe
qualification,competence,authority,oridentityofoneentityto another,establishing,authenticating,orverifying
legitimacy,intention,purpose,accountability,andtrust.
cross-consistentreplication. Avarietyofreplicationinvolvingagroup ofserverswhichpreservestheir
synchronicityduringreplicationandrecovery.
Bytessentfromaclient'sservermustbewrittentotheVSRreplicationserverinthecorrectorder.Thisis
accomplished byassemblingthebytesaccordingto theirassociateddatestampsestablishedbytheclockintheclient
computer.Fornormal(non-cross-consistent)replication,eachserverusesitsownclock.
Forcross-consistent(group)replication,agroupoftwo ormoreserversallusethesameclock.Thisensuresthatthey
willallbepreciselysynchronizedto eachotheratthetimeofrecovery.All serversincross-consistentgroups mustbe
physical,becausevirtualmachineclockscannotguaranteethecorrecttime.
Considertheexampleofadatabaseserverand anapplicationserverthataccessesthatdatabase.Iftheyarereplicated
asacross-consistentgroup,youcould besurethatbothserverswererecoveredfromexactlythesamepointintime.
Iftheywerenot,however,therewouldbenoguarantee.
Generally,ifonerecoveryprotectedserverrequiresanotherrecoveryprotectedserverto function,theyshouldbe
replicatedas across-consistentgroup.
CSV. SeeComma-separatedValues(CSV).
CustomerVSRAdministrator. PerformsanytaskrequiredofcustomersroleintheIBMSmartCloud VSRservice,
including:
v Install aVSRReplicationClient
– Install aVSRReplicationClient(Windows2003or2008)
– Install Red Hat5Linux ReplicationClient
v CreateaSite/Location
v DeleteaSite/Location
v SetSiteOptions
v SetSiteOptionsandServerGroups
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IBMSmartCloudVirtualizedServerRecovery: UserGuide
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v Add ServerstotheSolution
– Add aServer(withNoCross-consistency)
– Add aServer(withCross-consistency)
– Add Volumesto anExistingServer
– ConfigureGroupedSystems
– ProtectaMicrosoftWindows2008Cluster
– ConfigureaMicrosoftWindows2008Cluster
v CreateanAlwaysAvailableServer
v CreateanAlwaysAvailableServerGroup
v PerformaDisasterRecoveryTest
v ManageDisasterRecoveryTestMachines
v TestanAlwaysAvailableServer
v TestaVSRServerGroup
v ReportDisasterRecoveryTestResults
– RunaReport
– SetReportSchedules
v PerformaDisasterRecovery
v RecoveraServerGroup
v RecoveranAlwaysAvailableServer
v FailbackaRecovered Server
v FreezeandUnfreezeaReplication
v SetVSRSystemCredentials
v SetServerCredentials
v SetVSRUserCredentials
D
dependencyfile. A(.dep)filethatcontainsinformationabouttherun-timerequirementsofasolutionor
component.Forexample,suchafileidentifieswhichfilesareneeded,howtheyaretoberegistered,and whereon
theuser'smachinetheyshould beinstalled.ConfigurationofaMicrosoftWindows2008Clusterinvolvesthecreation
ofdependencyfiles.
dependencygroup. Componentsuponwhichanysimilarlydefined componentcanspecifyanincludedependency
orabuildorderdependency.TheProtect>ProtectDependentServersmenuselectionintheVSRmainmenu allows
userstoconfiguregrouped systemsinto aDependencyGroupofserversthatcanonlyberecoveredsimultaneously,
inacross-consistentmanner,asopposedto individually.Seealso cross-consistentreplication.
DHCP. SeeDynamicHostConfigurationProtocol (DHCP).
DigitalSignal1. Digital servicehierarchylevel1network,offeringuptoamaximumchannelcapacityof1.544
Mb/s.Also referredto asT1.
DigitalSignal2. Digital servicehierarchylevel2network.offeringone6.312Mb/schannel,equivalentto 96voice
gradelines,eachwith64Kbpscapacity.
DigitalSignal3. Digital servicehierarchylevel3network,offeringuptoamaximumchannelcapacityof44.736
Mb/s.
Disasterand TestVirtualMachineservicelevel. Themid-rangeservicelevel offeringoftheVSRproduct.The
typical recoverytimeobjective(RTO)forthisservicelevelislessthan15minutes.VSRtakessnapshotsofthetarget
systematthisservicelevelhourly.
Inotherrespectsitisidentical totheAlwaysAvailableVirtualMachineservicelevel,thenotableexceptionbeingthe
AlwaysAvailableservicefeature,itself.VSRtakessnapshotsofthetargetsystemattheAlwaysAvailableVirtual Machine
servicelevel everyfifteenminutes.
D
Glossary
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Thisistheonlyservicelevelupgradeableto theAlwaysAvailableVirtual Machineservicelevel.Thesilverservericon
inthetreeviewindicatesaserverprotectedattheDisasterandTestVirtualMachineservicelevel.
DREnsemble. TheVSRdisasterrecoverycomponentthatcontainsalloftheCustomerVirtualMachines(VM),to
allowdisasterrecoverytesting,real disasterrecoveryexercises,andevenalwaysavailableVMsforcustomersselecting
theAlwaysAvailableVirtualMachineservicelevel.TheremaybemultipleD/REnsembleswithinaVSRPOD.
DR. SeeDisasterRecovery(DR).
DS1. SeeDigitalSignal 1(DS1).
DS2. SeeDigitalSignal 2(DS2).
DS3. SeeDigitalSignal 3(DS3).
Dynamic HostConfigurationProtocol(DHCP). Acommunicationsprotocolthatletsnetworkadministrators
centrallymanageandautomatetheassignmentofInternetProtocol (IP)addressesinanorganization's network.
UsingtheInternetProtocol,eachmachinethatcanconnecttotheInternetneedsauniqueIPaddress,whichis
assignedwhenanInternetconnectioniscreatedforaspecificcomputer.WithoutDHCP,theIPaddressmustbe
entered manuallyateachcomputerinanorganizationand anewIPaddressmustbeenteredeachtimeacomputer
movesto anewlocationonthenetwork.
E
encryptionkeypair. Apairofasymmetric cryptographickeys (thatis,onedecryptsmessageswhichhavebeen
encryptedusingtheother)consistingofapublickeyand aprivatekey.
F
failback. Theprocessbywhichasystemreturnstonormalcyafterfailoveriscompleted.
failbackISOimage. Thesystemimagedownloadablefromtheportal downloadpagerequiredforsystemfailback.
failover. Thecapabilitytoswitchtoaredundantorstandbycomputerserver,system,ornetworkuponthefailureor
abnormal terminationofthepreviouslyactiveapplication,server,system,ornetwork.
FileTransferProtocol(FTP). AnapplicationlayerprotocolthatusesTCPandTelnetservicestotransferbulk-data
filesbetweenmachinesorhostsoveraTCP/IP-basednetwork,suchastheInternet.
firewall. Afirewallisadeviceorsetofdevicesdesignedto permitordenynetworktransmissionsbaseduponaset
ofrules.
freezereplication. Freezing(pausing)and Unfreezingfeaturescanbeuseful ifyouareabouttoperformarisky
actiononyourserver,suchasinstallingamajorservicepackontoacritical server'soperatingsystem.Ifyou freeze
thereplicationbeforeyou startsuchanoperation,anditfails,you canrecovertheabsolutelymostrecentdata
availablebeforetheinstallationfailed.
FTP. SeeFileTransferProtocol (FTP).
FTP SynchronizerProfessional. AnFTPsyncproductthatallowsyou tosynchronizefilesbetweenlocal computers
andremoteFTPservers.
FTP client. FTPisbuiltonaclient-serverarchitectureandutilizesseparatecontroland dataconnectionsbetween
theclientand server.ToconnecttoanFTPserver,aclientrequiresausernameandpasswordassetbythe
administratoroftheserver.
G
GeoTrustcertificate. GeoTrustisalargedigital certificateprovider.
Incryptography,apublickeycertificate(also knownasadigitalcertificateoridentitycertificate)isanelectronic
documentwhichusesadigitalsignaturetobind apublickeywithanidentity—informationsuchas thenameofa
personoranorganization,theiraddress,andso forth.Thecertificatecanbeused to verifythatapublickeybelongs
toanindividual.IBMVSRportalsusedigitalcertificatesprovidedbyGeoTrust.
E • G
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IBMSmartCloudVirtualizedServerRecovery: UserGuide
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gold-levelserverrecovery. SeeAlwaysAvailableVirtualMachineservicelevel.
guestOS. Anoperatingsystem(OS)thatisinstalledinavirtualmachineordiskpartitioninadditionto thehostor
mainOS.
H
HTML. SeeHypertextMarkupLanguage(HTML).
HTTP. SeeHypertextTransferProtocol (HTTP).
HTTPS. SeeHypertextTransferProtocol Secure(HTTPS).
HypertextMarkupLanguage(HTML). Astandardizedsystemfortaggingtextfilesto achievefont,color,graphic,
andhyperlinkeffectsonWorldWideWebpages.
HypertextTransferProtocol(HTTP). Anetworkingprotocolfordistributed,collaborative,hypermediainformation
systems.HTTPisthefoundationofdatacommunicationfortheWorldWideWeb.
HypertextTransferProtocolSecure(HTTPS). AcombinationoftheHypertextTransferProtocol(HTTP)with
SSL/TLSprotocol toprovideencryptedcommunicationandsecureidentificationofanetworkwebserver.HTTPS
connectionsareoftenusedforpaymenttransactionsontheWorldWideWeband forsensitivetransactionsin
corporateinformationsystems.
hypervisor. Also calledvirtual machinemanager(VMM),oneofmanyhardwarevirtualizationtechniquesthat
allowmultipleoperatingsystems,termed guests,to runconcurrentlyonahostcomputer.Itissonamed becauseitis
conceptuallyonelevelhigherthanasupervisoryprogram.Thehypervisorpresentstotheguestoperatingsystemsa
virtualoperatingplatformandmanagestheexecutionoftheguestoperatingsystems.
I
ID. Seeuseridentification(ID).
ImportedMediaVirtualMachineservicelevel. Thisis thebasic servicelevel offering.Itallowsclientstorecover
theirdatafromphysical mediasuchastape,network-attached storage(NAS),orUniversal SerialBus(USB)devices
(removablemedia).
InstallShieldWizard. TheInstallShield Wizardisautilitythatguidesyoustep-by-stepthroughtheprocessof
installingsoftwareonyourcomputer.
InternationalOrganizationforStandards. Aninternational standard-settingbodycomposed ofrepresentativesfrom
variousnational standardsorganizations.Theorganizationpromulgatesworldwideproprietary,industrialand
commercialstandards.
InternetProtocolSecurity(IPSEC). Aprotocol suiteforsecuringInternetProtocol (IP)communicationsby
authenticatingand encryptingeachIPpacketofacommunicationsession.IPsec also includesprotocolsfor
establishingmutual authenticationbetweenagentsatthebeginningofthesessionandnegotiationofcryptographic
keystobeusedduringthesession.
InternetProtocolversion4(IPv4). ThefourthrevisioninthedevelopmentoftheInternetProtocol (IP)andthefirst
versionoftheprotocolto bewidelydeployed.
IP Address. Anumericallabelassigned toeachdevice(thatis,computer,printer)participatinginacomputer
networkthatusestheInternetProtocol forcommunication.AnIPaddressservestwoprincipalfunctions:hostor
networkinterfaceidentificationandlocationaddressing.
IPv4format. SeeInternetProtocol version4(IPv4).
ISO. SeeInternationalOrganizationforStandard(ISO).
L
LAN. SeeLocalAreaNetwork(LAN).
level3T-carrier. Alsoreferredto asaT3line,thedatarateforthistypeofsignalis44.736Mbit/s.
H • L
Glossary
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liveserverrecovery. Arecoverytypeinvolvingtheidentificationand recoveryofaDisasterandTestVirtualMachine
orAlwaysAvailableVirtual Machineservicelevel-protectedserverbysite,systemtype,servername,recoverytype,
usingasnapshotassociatedwithapointintime(RealtimeTargetVolume).
LocalAreaNetwork (LAN). Anetworkthatsuppliesnetworkingcapabilityto agroup ofcomputersinclose
proximityto eachothersuchasinanofficebuilding.
logicalpartition(LPAR). Asubsetofacomputer'shardwareresources,virtualizedasaseparatecomputer.Ineffect,
aphysical machinecanbepartitioned into multiplelogical partitions,eachhostingaseparateoperatingsystem.
LPAR. Seelogicalpartition(LPAR).
M
MasterBootRecord (MBR). Theveryfirstsectionofdataonthehard drive.Itholdsthestartup programand
informationabouteachprimaryorextended partitiononthatdrive.Italsohasaflagto indicateifapartitionis
active/bootable.
MBR. SeeMasterBootRecord (MBR).
MicrosoftClusterServer(MSCS). MicrosoftClusterServer(MSCS)issoftwaredesignedto allowserversto work
togetherascomputercluster,toprovidefailoverand increasedavailabilityofapplications,orparallel calculating
powerincaseofhigh-performancecomputing(HPC)clusters(asinsupercomputing).Thissoftwareisincluded with
MicrosoftWindowsNTEnterpriseEdition,MicrosoftWindows2000AdvancedServer,andMicrosoftWindows2000
DatacenterServersoftware.
MSCS. SeeMicrosoftClusterServer(MSCS).
N
NAS. SeeNetwork-attached storage(NAS).
Network-attachedstorage(NAS). File-level computerdatastorageconnectedto acomputernetworkprovidingdata
accessto heterogeneousclients.Anetwork-attachedstorage(NAS)deviceisaserverthatisdedicatedtonothing
morethanfilesharing.NASdoesnotprovideanyoftheactivitiesthataserverinaserver-centricsystemtypically
provides,suchase-mail,authenticationorfilemanagement.
O
OC3. SeeOptical Carrierlevel 3(OC3).
OpenVirtualizationFormat(OVF). Anopenstandardforpackaginganddistributingvirtual appliances,ormore
generally,softwaretoberuninvirtualmachines.
OpticalCarrierlevel3(OC3). Optical Carrierlevel 3network,offeringup to amaximumchannel capacityof155.52
Mb/s.
OVF. SeeOpenVirtualizationFormat(OVF).
P
password. Acomputer-generated oruser-createdcharactersequencethatmeetscertainrulesgoverninglengthand
constitutionusedto establishandvalidatetheidentityofitsuniqueowner,authorizetheiraccessto,andmonitor
theiractivityonacomputersystemornetwork.
PDF. Seeportabledocumentformat(PDF).
PIT. SeePointinTime(PIT).
PointinTime(PIT). Themonth,day,year,hour,minute,and second (mm/dd/yyyyhh:mm:ss)thatasystemsnapshot
maybeestablished bytheCustomerVSRAdministratorforoptional eventualrecovery.
M • P
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IBMSmartCloudVirtualizedServerRecovery: UserGuide
Note: Thisfeatureisuseful when,forexample,anUPDATEstatementhasbrokenadatabasebutyou did notnotice
thedamageforseveralhours.Usethisfeatureto roll backto thelastsnapshottakenbeforeanincidentoccurred.The
snapshotisoneofseveralvolumesintheSAN,eachrepresentingasnapshotofthemainvolumeforthatserverona
differentdate,atadifferenttime.
portabledocumentformat(PDF). Astandardspecified byAdobeSystemsIncorporatedfortheelectronic
distributionofdocuments.PDFfiles arecompact;canbedistributedgloballybye-mail,theweb,intranets,or
CD-ROM;and canbeviewedwiththeAcrobatReader.
portal. Awebportalorself-serviceportalisawebsitethatfunctions asapointofaccesstoinformationonthe
Internet.Aportal presentsinformationfromdiversesourcesinaunified way.
R
RecoveryHost. Ahostcomputerthatdrivestherecoveryandrestorationofproductiondataafterafailure.
Recoverypointobjective(RPO). Theacceptableamountofdatalossmeasured intime.Therecoverypointobjective
isthepointintimeto whichyou mustrecoverdataasdefinedbyyourorganization.
Recoverytimeobjective(RTO). Recoverytimeobjective(RTO).Themaximumtolerablelengthoftimethata
computer,system,network,orapplicationcantypicallybedown(until systembootstart)afterafailureordisaster
occurs.TheRTOisafunctionoftheextentto whichtheinterruptiondisruptsnormaloperationsandtheamountof
revenuelostbyunitoftimeasaresultofthedisaster.
Red HatEnterpriseLinux(RHEL). ALinux-based operatingsystemproducedbyRedHatandtargetedtowardthe
commercialmarket,includingmainframes.
replicationagent. Replicationagentscarryoutmanyofthetasksassociated withreplication,includingcreating
copiesofschemaand data,detectingupdatesatthePublisherorSubscriber,and propagatingchangesbetween
servers.Bydefault,replicationagentsrununderMicrosoftSQLServerAgentjobsteps.
replicationclient. ThissoftwarepackageinstallsoneverysourceserverthattheuserwishestoincludeinaVSR
solution.Itactsasthemainpointofcommunicationbetweenthecustomer'sserverandtheVSRManagementServer.
replicationensemble. TheVSRcomponentthatholdsalloftheserversusedinaVSRCinstallationto replicate
customerproductiondata.YoucanhavemultipleReplicationEnsembleswithinaVSRPOD.
replicationserver. TheserverbeingreplicatedbytheIBMSmartCloudVSRservice.
RHEL. SeeRed HatEnterpriseLinux (RHEL).
role. Aserverroleisasetofsoftwareprogramsthat,whentheyareinstalled andproperlyconfigured,letsa
computerperformaspecificfunctionformultipleusersorothercomputerswithinanetwork.Generally,rolesshare
thefollowingcharacteristics:
v Theydescribetheprimaryfunction,purpose,oruseofacomputer.Aspecificcomputercanbededicatedto
performasinglerolethatisheavilyused intheenterprise,ormayperformmultiplerolesifeachroleisonly
lightlyused intheenterprise.
v Theyprovideusersthroughoutanorganizationaccesstoresourcesmanagedbyothercomputers,suchasWeb
sites,printers,orfilesthatarestoredondifferentcomputers.
v Theytypicallyincludetheirowndatabasesthatcanqueueuserorcomputerrequests,orrecordinformationabout
networkusersandcomputersthatrelatestotherole.Forexample,ActiveDirectoryDomainServicesincludesa
databaseforstoringthenamesandhierarchicalrelationshipsofall computersinanetwork.
v Assoonastheyareproperlyinstalledandconfigured,rolesfunctionautomatically.Thisallowsthecomputerson
whichtheyareinstalledto performprescribedtaskswithlimitedusercommandsorsupervision.
Seealso:
v User
v CustomerVSRAdministrator
v IBMVSRAdministrator
roleservices. Softwareprogramsthatprovidethefunctionalityofarole.Whenyouinstallarole,youcanchoose
whichroleservicestheroleprovidesforotherusersandcomputers inyourenterprise.Someroles,suchasDNS
R
Glossary
49
Server,haveonlyasinglefunction,andthereforedonothaveavailableroleservices.Otherroles,suchasRemote
DesktopServices,haveseveralroleservicesthatcanbeinstalled,dependingontheremotecomputingneedsofyour
enterprise.You canconsideraroleasagroupingofcloselyrelated,complementaryroleservices,forwhich,mostof
thetime,installingtherolemeansinstallingoneormoreofitsroleservices.
RPO. SeeRecoverypointobjective(RPO).
RTO. SeeRecoverytimeobjective(RTO).
S
SAN. Seestorageareanetwork(SAN).
scheduled report. Areportthatcomesoutatapredetermined time.
scorecardgrid. Asystemused to markareasto bereplicated whenadisruptednetworkislaterrestored.
SecureSocketsLayer(SSL). AcryptographicprotocolthatprovidescommunicationsecurityovertheInternet.It
encryptsthesegmentsofnetworkconnectionsabovetheTransportLayer,usingasymmetriccryptographyforprivacy
andakeyedmessageauthenticationcodeformessagereliability.Severalversionsoftheprotocol areinwidespread
useinapplicationssuchaswebbrowsing,electronic mail,Internetfaxing,instantmessagingandvoice-over-IP(VoIP).
Thesamecanbesaid ofit'ssuccessorprotocol,TransportLayerSecurity(TLS).
security. Therulesthatallowand limitaccesstocomputersanddata.InIBM SmartCloudVSR,securityisbased on
assignedrolesand theIBMBCRSFirewall,providingsecurityand isolationbetweenthecustomernetworkandthe
IBMBCRS CoreLAN.
Self-ServicePortal. A,portal,webportalorself-serviceportal isawebsitethatfunctionsasapointofaccessto
informationontheInternet.Aportalpresentsinformationfromdiversesourcesinaunifiedway.Seeportal.Seealso
webportal.
servicelevel. IBMSmartCloudVSRoffersthreelevelsofservice,asfollows:
v SeeAlwaysAvailableVirtualMachineservicelevel.
v SeeDisasterandTestVirtualMachineservicelevel.
v SeeImportedMediaVirtualMachineservicelevel.
silver-Levelserverrecovery. SeeDisasterandTestVirtualMachineservicelevel.
SMOS. SeeSnapMirrorforOpenSystems(SMOS).
SnapMirrorforOpenSystems(SMOS). Enterprise-classsoftwarefordatareplicationandrecoveryacross
heterogeneousinfrastructure.
snapshot. Thestateofasystemataparticularpointintime.TheDisasterandTestVirtualMachineservicelevelstores
24snapshots (takenhourly),whiletheAlwaysAvailableVirtualMachineservicelevelstores96(takeneachquarter
hour).
SocketException. ASocketExceptionisthrownbytheSocketandDnsclasseswhenanetworkerroroccurs.
SplashScreen. Animagethatappearswhileaprogramisloading.
SSL. SeeSecureSocketsLayer(SSL).
SSL certificate. TheSecureSocketLayerprotocolwascreated to ensuresecuretransactionsbetweenwebservers
andbrowsers.Theprotocolusesathird party,aCertificateAuthority(CA),to identifyoneorbothendsofthe
transactions.
storageareanetwork (SAN). Adedicatednetworkthatprovidesaccessto consolidated,blockleveldatastorage.
Structured QueryLanguage(SQL). Aninternationalstandardlanguageformanipulatingrelationaldatabases.
suspend replication. Suspendingreplicationallowsyouto stopreplicationsystemoperationformaintenanceor
troubleshooting,withouttermination.
S
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IBMSmartCloudVirtualizedServerRecovery: UserGuide
Synchronization&BandwidthEstimator. AtoolthatallowstheIBMSmartCloudVSRcustomerto planbandwidth
requirementsbased onexistingbandwidthavailable,networkresourcetype,enduseractivity,anduniquedisaster
recoverystrategyrequirements.
T
T1. Datatransfersystemthattransfersdigitalsignalsat1.544megabitspersecond.SeeDigitalSignal1.
T3. Seelevel 3T-carrier.
TLS. SeeTransportLayerSecurity(TLS).
Tivoli® ServiceRequestManager® (SRM). Anintegratedplatformthatprovidesacomprehensivesetoffeatures
andfunctionsthatassistsuserstomanageenterpriseservicerequests.
TransportLayerSecurity(TLS). AcryptographicprotocolthatprovidescommunicationsecurityovertheInternet.It
encryptsthesegmentsofnetworkconnectionsabovetheTransportLayer,usingasymmetriccryptographyforprivacy
andakeyedmessageauthenticationcodeformessagereliability.Severalversionsoftheprotocol areinwidespread
useinapplicationssuchaswebbrowsing,electronic mail,Internetfaxing,instantmessagingandvoice-over-IP(VoIP).
Thesamecanbesaid ofitspredecessorprotocol,SecureSocketsLayer(SSL).
U
User. PerformsanytaskauthorizedbytheCustomerAdministratorroleintheIBM SmartCloudVSRservice.
UniversalDisk Format(UDF). Animplementationofthespecificationknownas ISO/IEC13346and ECMA-167
andanopenvendor-neutralfilesystemforcomputerdatastorageforabroadrangeofmedia.Inpractice,ithasbeen
mostwidelyusedforDVDsand neweroptical disc formats,supplantingISO9660.Dueto itsdesign,itis verywell
suited forincrementalupdatesonbothrecordableor(re)writableopticalmedia.
UniversalSerialBus(USB). Anindustrystandard thatdefinesthecables,connectorsandprotocolsusedfor
connection,communicationand powersupplybetweencomputers and electronic devices.USBwasdesignedto
standardizetheconnectionofcomputerperipherals,suchaskeyboards,pointingdevices,digital cameras,printers,
portablemediaplayers,diskdrivesand networkadaptersto personalcomputers,bothto communicateandtosupply
electricpower.
USB. SeeUniversal SerialBus(USB).
URL. SeeUniversalResourceLocator(URL).
UI. SeeUserInterface(UI).
UniversalResourceLocator(URL). Acharacterstringthatspecifies whereaknownresourceisavailableonthe
Internetandthemechanismforretrievingit.AURListechnicallyatypeofUniformResourceIdentifier(URI)butin
manytechnicaldocumentsandverbaldiscussions,URLisoftenusedasasynonymforURI.
userID. Seeuseridentification(ID).
userinterface(UI). Intheindustrialdesignfieldofhuman–machineinteraction,userinterfaceisthespacewhere
interactionbetweenhumansandmachinesoccurs.Auserinterfaceisthesystembywhichpeople(users)interact
withamachine.
V
virtualprivatenetwork (VPN). Anextensionofacompanyintranetovertheexistingframeworkofeitherapublic
orprivatenetwork.AVPNensuresthatthedatathatissentbetweenthetwo endpointsofitsconnectionremains
secure.
vCenter. AcomponentoftheIBMservicedeliveryinfrastructurethathelpstoensureresiliencyoftherecovery
environment.
vdisk. Avirtual logicaldiskorvolumeto whichahostorapplicationperformsI/Ooperations.Generallyprovided
byastoragevirtualizationdeviceandapplicablemainlytoFibreChannel storageareanetwork(FCSAN)
infrastructures,thediskisclassedasvirtual duetothewayitis mapped to thephysical storagecapacityit
T • V
Glossary
51
represents.Inmostvirtual storagesystemsametadatamappingtableisheld whichtranslatestheincoming(virtual)
diskidentifier,and LBA(logical blockaddressing)to aphysical diskidentifierand LBA.
VirtualMachine(VM). Atightlyisolated softwarecontainerthatcanrunitsownoperatingsystemsand
applicationsasifitwereaphysicalcomputer.Avirtualmachinebehavesexactlylikeaphysicalcomputerand
containsitownvirtual(thatis,software-based)CPU,RAM hard diskandnetworkinterfacecard (NIC).Anoperating
systemcannotdistinguishthedifferencebetweenavirtualmachineand aphysical machine,norcanapplicationsor
othercomputersonanetwork.
VirtualPrivateNetwork(VPN). Anetworkthatusesprimarilypublic telecommunicationinfrastructure,suchasthe
Internet,toprovideremoteofficesortravelingusersaccesstoacentralorganizational network.
virtualization. Thecreationofavirtual (ratherthanactual)versionofsomething,suchasahardwareplatform,
operatingsystem,astoragedeviceornetworkresources.
Virtualized ServerRecovery(VSR). Awebportal-basedIBMSmartCloudservicethathoststhree(two automated
andonemanual)typesofcustomerdisasterrecoveryservicesubscriptions.
UsingVSR,acustomer(astheCustomerVSRAdministratororauthorized user)orIBM(astheIBM VSR
Administrator)onthecustomer's behalf,caninstructVSRManagementSoftwarewhenloaded andsetuponthe
customer'sproductionservers.Serverreplication,disasterrecoverytest,anddisasterrecoveryinvocationare
automatedwhenselectingthedesired optionsfromtheportal.
VM. SeeVirtual Machine(VM).
vMotion. AcomponentoftheIBMservicedeliveryinfrastructurethathelpstoensureresiliencyoftherecovery
environment.
VPN. Seevirtual privatenetwork(VPN).
VRF. SeeVirtual Routingand Forwarding(VRF).
VSR. SeeVirtualizedServerRecovery(VSR).
W
webportal. AwebportalisawebsitethatfunctionsasapointofaccesstoinformationontheInternet.Aportal
presentsinformationfromdiversesourcesinaunified way.
Windowscluster. Agroup oflinked Windows-basedcomputers,workingtogethersocloselythat,inmanyrespects,
theyformasinglecomputer.
X
XML. SeeExtensibleMarkupLanguage(XML).
W • X
52
IBMSmartCloudVirtualizedServerRecovery: UserGuide
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Documents you may be interested