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Migrating from TARA to DSAImplementation Considerations

Ram Koralla / John MelerAdvisor Teradata DBA, Anthem/ Senior Technical Consultant, Teradata

1. Problem Statement2. Environment Before Upgrade3. Upgrade Plan4. Test Results5. Issues Encountered6. Limitations7. BAR Environment with Old and New Hardware8. Future Plans

Agenda

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Problem Statement

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Migrate BAR Environment to Data Stream Architecture “DSA” for Performance

• Current Media Server and network hardware not supported by DSA

• Running out of capacity in tape library• Cannot Incrementally migrate TD Systems or Jobs to new

hardware • Drives & Media Servers are shared between systems

• Backups and Restore Schedule cannot be interrupted• Scheduled outages allowed once week for

implementation

Environment Before Upgrade

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Current Backup Details

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Backup size per Week• 800+ Terabytes

Restore size per Week• 10 Terabytes

Vaulting• 20 Vault Profiles• 400 Terabytes• 220 Tapes

NetBackup• 600 new Policies• 51 Tape Drives (SL8500)

Upgrade Plan

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Phase 1 & 2Upgrade BAR Hardware

Phase 3Migrate TARA Jobs

Phase 4Rewrite Jobs for DSA

Phase 5Migrate DSA jobs to Disk

Phase 1 – Upgrade BAR Hardware

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Upgrade Master Server Hardware – Outage Required• Replace with DSADSC Server• Migrate Netbackup Catalog• Migrate TaraServer Directories• Update NBU and TARA configuration• No changes to existing TARA jobs.

Phase 2 – Upgrade BAR Hardware

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Add New Media Servers to Domain• Install NBU and TARA software• Update NBU and TARA configurations• Test with backup to local disk on media servers• Legacy media servers still running production backups

Migrate BAR Private Network to Bynet v5 as TD Systems are Replaced

Phase 3 – Migrate TARA Jobs

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Re-architect TARA jobs for fewer media servers• Client groups simplify creation and maintenance• Redesign BAR Private Network for Client Groups

• 1 GbE network migrated

Create new TARA Jobs• Create policies with dummy storage units

• Create Linux scripts to generate Policies• Create Client Groups and Jobs with dummy Policies

Phase 3 – Migrate TARA Jobs …

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Re-architect Vaulting• Create profiles using dummy policies• Adjust profile scheduling to match new job scheduling

Switch Backups to new media servers – Outage Required• Switch Library connections to New Media Server

• Regenerate policies with actual Storage Units• Re-IP TD nodes and connections for new BAR Private

network design• Activate new backup and vaulting schedules

Phase 4 – Rewrite Jobs for DSA

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Re-architect TARA jobs for DSA• Gradual transition• Map Client Groups to Target Groups

• One Stream per tape device• Redesigned BAR Private Network Optimal for Target

Groups

Phase 5 – Migrate DSA Jobs to Disk

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Re-architect DSA Jobs for Disk storage• Optimize for deduplication

• One Stream per AMP• Test multiple backup generations per job

Re-architect Vaulting• Modify profiles to vault increased streams• Adjust retentions based on disk space• Adjust Vaulting schedule based on retentions

• Delete from disk after vaulting

DSA Test Results and Comparison

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Comparison between TARA & DSA

• Runtimes vary between 30%-60% less with DSA

• Tape usage reduced 50% for Dev/Test systems using Block Level Compression.

• Script migration still in progress.

DSA Test Results and Comparison …

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Comparison Test Data between TARA and DSA

TARA Job:Total Runtime: 28 minutesSize: 1.4 TB

DSA job:Total Runtime: 15 minutesSize: 341 GB

Issues Encountered

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Encountered the following issues during configuration:

• HSN and Channel Nodes are not connected to CLAN or BAR network

• No Room on Switches and added nodes using CLAN

• TCP/IP ports opened on CLAN

Limitations

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• All objects in the job are locked at beginning of job

• Scripting and editing of jobs is awkward with XML

• Backup objects not tracked in DBC.RC Event table

• Need to Export the log file of a job to a csv file and load to table.

• Difficult to check job details while job is executing.

BAR Environment with Old and New Hardware

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• New Media Servers

• Existing Tape Library (SL8500)

• Existing Tape Drives

• Existing Tapes

• Existing OKM

BAR Environment with Old and New Hardware …

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Future Plans

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• Upgrade to DSA 15.11

• Move to Data Domain

• Re-architect DSA jobs for Data Domain

• Automate restore of data to Disaster Recovery site.

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Thank You

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Ramakrishna Koralla: ramakrishna.koralla@anthem.comJohn Meler: John.Meler@teradata.com

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