IBM DATA MIGRATION SERVICES - Brochure - page 24
Softek’s TDMF UNIX (IP) software was chosen as the least risky option because
no system reboots were required. The migration was performed without requir-
ing a reboot of any critical service, continuous application availability was
maintained during data migration, and the migration was performed without
end users experiencing any loss or significant degradation in service.
Softek solution: global migration to new servers and new storage
1.Intheinitialphase,configurationswerepre-createdanduser-customizable
scriptswerewrittentounmount,replacethevfstabfile,andremountfilesystems.
2.TDMFsoftwarewasinstalledjustpriortoweeklyshutdownwithnodis-
ruption.Eachserverisconfiguredinturn,withatotalelapsedtimeof15
minutesforTDMFinstallationandconfiguration.
3.AfullrefreshfromsourceserverAtotargetserverAwasconductedover
thecourseofaweek.Bigasynchronousbuffer(BAB)absorbedpeaksin
writeactivityonlegacyserverstominimizeCPUusageandpreventhigh
I/Oload.
4.NewversionsofOracleandothersoftwarepreinstalledontargetserverA
weretested.Testinginvolvedreceivingmultipleapplication-consistentver-
sionsofproductiondisksonadailybasis.Toavoidhavingtorefreshfrom
theproductiondiskseverytime,checkpointandachainingconfiguration
wereused.
5.Atthecompletionofthetesting,journalwrotetotargetvolumestoensure
minimaldatatransferonresynchronization.
6.Duringthenextweekend’soutage,applicationsontargetserverAwere
broughtupandpointedtothenewstoragevolumes.SourceserverAwas
takenoutofservice.
Storage migrations made simple.
Page 24
Highlights
Not only did the migration not
require a reboot of any critical
service, but it also provided con-
tinuous application availability
and no loss or degradation of ser-
vice for end users.
An insurance company chose
Softek’s TDMF UNIX (IP) software
because it was the least risky
option, requiring no reboots.