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Nye anvendelsesområder for en High Availability løsning

Nye anvendelsesområder for en High Availability løsning. Ellen Dreyer Andersen Certificeret IT Specialist, IBM Danmark A/S. Soft Design seminar, Gl. Avernæs, 11. september 2012. Downtime. Solution Required. Causes Of Downtime. . Disaster Recovery High Availability (Continuous

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Nye anvendelsesområder for en High Availability løsning

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  1. Nye anvendelsesområder for en High Availability løsning Ellen Dreyer Andersen Certificeret IT Specialist, IBM Danmark A/S Soft Design seminar, Gl. Avernæs, 11. september 2012

  2. Downtime Solution Required Causes Of Downtime  Disaster Recovery High Availability (Continuous Operations)  Downtime refers to a period of time or a percentage of a timespan that a machine or system (usually a computer server) is offline or not functioning, usually as a result of either system failure (such as a crash or routine maintenance. Source: IBM HA Presentation, Eric Hess, April 2001 * ‘HA’ generally refers to solutions that provide BOTH recovery and availability. Not all technologies provide a solution for BOTH…iTera 6.0 HA does Reliability is not the same as Availability!

  3. Formål med installationen ? • Sikre mod uplanlagt nedbrud / katastrofer • Køre videre under planlagte nedlukninger • Backup på spejlet • Forespørgsler på spejlet (aflastning) • Andet …

  4. Popular Replication Scenarios 3 2 1 Production System (A) Backup System (B) Production System (A) Backup System (B) Backup LPAR Production LPAR One-to-One Replication (A to B Scenario) Backup LPAR Production LPAR Replicant/ Backup System (C) One-to-Many Replication (A to B & C Scenario) Bi-Directional Replication 5 4 6 Production LPAR (A) Backup system Production System Production LPAR Backup LPAR Backup LPAR (B) Production LPAR Backup LPAR Backup system Production System Single-System Replication (A to B scenario) One-to-Many Replication Many-to-One Replication ‘Flexibility = Business Value’

  5. Role Swap/rolleskift • Backupmaskine anvendes til produktion: • Kan applikationerne startes? • Hvad med externe forbindelser? • Printere, bruger ID’er osv. Tro ikke bare på at det virker – PRØV DET !

  6. Et eksempel fra det virkelige liv Mols-Linien råder i dag over 5 moderne færger, der årligt overfører næsten 1.000.000 personbiler og mere end 300.000 lastbiler.

  7. Opgaven Erstatte 2 stk. iSeries med 2 Power/i maskiner med minimal nedetid DKDDTBB Model MMA DKDDT Model E8A FRA: Delvis OMS/ODS Mirror spejling Erstattes af TIL: DKDDT Model MMC DKDDTBB Model MMC Fuld spejling med iTera HA

  8. Opgaven Opgradere 2 stk. iSeries til system/i uden nedetid Fra model E8A (produktion) --- > model MMA (spejl) Til model MMC (produktion) --- > model MMC (spejl) Omlægning fra OMS/ODS til iTera • Step 1: Sætte ny backup maskine ind i nettet • Installation af iTera og spejling til ny backupmaskine • SAMTIDIG med eksisterende spejl • Step 2: Virtuelt rolleskift med iTera – er nyt spejl OK? • Derefter nedlukning af OMS/ODS til gammelt spejl • Step 3: Sætte ny produktionsmaskine ind i nettet • Installation af iTera på ny produktionsmaskine og spejling af alle data • Step 4: TEST TEST TEST – igen virtuelt rolleskift • Step 5: Rigtigt rolleskift og derefter produktion på ny maskine

  9. Step 1 Ny backup maskine sættes i netværket og spejles op Model E8A Delvis OMS/ODS spejling Model MMA Fuld spejling med iTera HA Ny Power 7 MMC

  10. Step 2 Virtuelt rolleskift og derefter gammel spejling ud Model E8A Model MMA Delvis OMS/ODS spejling Fuld spejling med iTera HA Ny Power 7 MMC

  11. Virtual Test Role Swap • Run regularly (quarterly) to check backup system is role swap ready (RSR) • Allows you to test startup procedures and business applications on backup system • No effect on users on the production system • No system exposure or data loss • Can be executed in middle of the day • Virtual Mode suspends the apply process on the target • Replication continues and transactions are cached on the backup • While in Virtual Mode processes can be executed on the backup node to test • the applications including adding, updating data • When tests are complete • changes made on the backup • are rolled-back and normal • mirroring continues • A log of each virtual test is • produced Click here for animation of Virtual Test Role Swap Virtual Test Role Swap Initiation ‘Role-Swap Tests With No Downtime’

  12. Step 3 Ny Power 7 produktionsmaskine sættes i netværket og spejles op Model E8A Ny MMC prod Fuld iTera HA spejling Fuld iTera HA spejling Ny MMC backup

  13. Hvad skal spejles? • ALTING …? • Udmærket anledning til at rydde op • Ting der IKKE kan spejles • Spejle alt hvad der er nødvendigt for at køre videre på ny produktionsmaskine • Brugerprofiler, autorisationslister, programmer, print …?

  14. Step 4 TEST TEST TEST – virtuelt rolleskift flere gange Model E8A Fuld iTera HA spejling Ny MMC prod Fuld iTera HA spejling Ny MMC backup

  15. Step 5 Rigtigt rolleskift ! Model E8A Fuld iTera HA spejling Ny MMC prod Fuld iTera HA spejling Fuld iTera HA spejling Ny MMC backup

  16. Opgaven Erstatte 2 stk. iSeries med 2 Power/i maskiner med minimal nedetid DKDDTBB Model MMA Delvis OMS/ODS Mirror spejling DKDDT Model E8A FRA: DKDDTBB Model MMC DKDDT Model MMC TIL: Fuld spejling med iTera HA Løst – sammenlagt nedetid på under 11 timer ... Projektets varighed: 23.1. til 22.4.2012

  17. Spørgsmål ? Ellen Dreyer Andersen, eda@dk.ibm.com, tlf. 2880 6307

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