User manual IBM DATA MIGRATION SERVICES BROCHURE

[. . . ] IBM Global Technology Services December 2007 Storage migrations made simple. Overcoming the challenges of technology refresh Storage migrations made simple. Page 2 Contents Executive summary 2 4 6 Executive summary Introduction Data migration software 10 Technology refresh examples 28 Summary Minimizing the impact of data migrations on business operations is a critical part of the data center manager's job. Studies have shown that technology refresh -- defined as replacing an older server or storage array with a new one -- is the primary driver of data migration. Storage hardware and server replacement, as well as the expiration of storage equipment leases, means that storage managers have to move data on a regular basis. [. . . ] The key migration challenges were as follows: · Convertingdatabetweenvolumesizes--TheprojectrequiredmovingMOD3 arraysontoMOD3s, andMOD3arraysontoMOD9satbothvolumeand datasetlevels · Limiteddowntime--TheonlypermittedsystemdowntimewasSundaymornings. · Personnelconstraints--Therewerelimitedpersonnelavailabletoperform themigration. · Complexproject--Duetothecomplexityofthemigrationandthepersonnel constraints, theestimateddurationoftheprojectwasatleasttwoweeks. The savings and loan company evaluated several migration options: · Manualmethods -- Thisoptionwasconsideredtoolaborintensive, especially withthe"overworkedandunderstaffed"customerresourcebase. Avoiding bandwidthimpactsalsowouldbedifficult. · Array-basedreplication -- Thisoptioncouldnotbeusedastheproject involvedmigratingMOD3stoMOD9s. Storage migrations made simple. Page 16 Highlights After evaluating several migration methods, a savings and loan company chose Softek's TDMF and LDMF software due to their ability to migrate data nondisruptively, resize MODs and move specific data at the dataset level. A combination of Softek's TDMF and LDMF software was chosen because of the products' ability to migrate data nondisruptively, handle the resizing of MODs, and move specific data at the dataset level. With the LDMF/TDMF combination, the project was completed ahead of schedule (60 hours estimated, 55 hours actual), with data migration constituting 38 hours of the total time. This was considerably shorter than anticipated, and the migration was performed while the mainframe was in production, with no impact to end users. Softek solution: Local mainframe migration with volume consolidation 1. TDMFandLDMFsoftwarewasnondisruptivelyinstalledonIBMZ800 mainframeandverifiedbytheimplementationteam. 2. TheteammappedsourceandtargetvolumemigrationforTDMFmigration. Aspartoftheprocess, TDMFsoftwarewasusedtomigrateasinglesource MOD3toaMOD9, therebyestablishingthetargetMOD9intotheexisting storagemanagementsubsystem(SMS)environmentandeliminatingany SMSsetuprequirementsforthenewMOD9volumes. 3. TheteammappedtheremainingMOD3toMOD9migration, whichwas accomplishedusingLDMFsoftware. ThemappingdocumentedthetargetvolumeSMSstoragegroupsandstorageclass. Thisalsoidentifiedany volumesthatwerenotunderSMScontrol. 4. TDMFmigrationwasinitiated. Overthecourseoftenhours(including verification), theimplementationteammigrated200MOD3to200MOD3 and240MOD3to240MOD9. Thisentiremigrationwascompletedtransparentlyduringproductionhours. 5. TheimplementationteamsetupLDMFmigrationbybuildingsourceand targetdatasetmigrationgroups(460sourcevolumesgoingto240target volumesatthedatasetlevel). Storage migrations made simple. Page 17 Highlights 6. LDMFmigrationwasexecutedovera28-hourperiod(submissionofgroup migrations, monitoringprogressandverificationresults)andnoapplication impactwasreportedduringthisperiod. 7. Scheduledoff-hoursbounceofalldatabaseapplicationstookplaceafter migration, andthetotaldurationoftheoutageforallapplicationswas lessthanonehour. 7 This chart depicts the array-to-array migration with consolidation enabled by the Softek software. 2 DB2 and CICS VSAM applications 1 240 MOD3 to 240 MOD9 2 4 240 MOD3 to 240 MOD9 2 LDMF TDMF IBM Z800 4 5 6 460 source volumes to 240 target volumes at dataset level 3 5 Older arrays Figure 4 Local array-to-array migration with consolidation New arrays Storage migrations made simple. Page 18 Highlights Multiserver UNIX array-to-array migration with consolidation A Fortune 500 financial services firm had a mission-critical DB2 data warehouse (24TB DB2, 10TB supporting files) on seven IBM AIX® 5. 1 server platforms with the storage allocated to nine different storage arrays, some more than five years old. The firm faced these key migration challenges: · Storagegrowth -- Storagecapacitygrewfrom4TBto30TBinthreeyears, withstorageaddedinademand-driven, ratherthanaplanned, fashion. · Locatingstorage -- Storageadministratorswereunabletopreciselylocate storage. · Complexenvironment -- Thesystemcouldbeupgradedorchangedonlywith difficulty, resultinginnumerousendusercomplaintsaboutsystemperformance. · Relocatingdata -- Anewstoragearraywaspurchasedtoimproveperformance bymigratingandreconfiguringvolumes. · Source/targetincompatibilities -- Thefirmwasunabletoperformmigration duetothecomplexityoftheenvironment;thiscreatedincompatibilities betweenthesourceandtargetstoragearrays, sothenewarraysatunused fortwomonthsonthedatacenterfloor. [. . . ] Page 25 Highlights 7. TheprocesswasrepeatedforsourceserversBandCoverthenexttwoweeks. 8. Duringthenextscheduledoutage, theolderstoragearraywastaken outofservice. 7 7 This chart shows how the insurance company's global migration was executed. 2 TDMF TDMF Oracle applications Source environment 6 Target environment Source Source Server C Server B 1 2 4 BAB TDMF 3 Checkpoint Target Server A 4 3 4 7 7 Source Server A 1 6 A B C Journal checkpoint area 5 Old array 8 New arrays Figure 7 Global migration to new servers and storage Local Windows array-to-array migration A Fortune 500 bank had 5. 8TB of data on two servers for a key enterprise compliance management application based on Microsoft SQL. The bank wanted to move from an older locally attached storage array to a new locally attached storage array. Storage migrations made simple. Page 26 Highlights The key migration challenges were as follows: · Addingnewstorage -- Thegoalwastofreeupexistingstorageandimplement newfaster, cheaperstorage. [. . . ]