Financial Case Study

Customer Type Major European Banking Services Group
Customer Sector Financial
Source Storage 4xEMC VMAX at each of two source sites
Target Storage IBM SVC Storage Farm
Number of Hosts  586
Host Types AIX, Solaris, HP-UX, Windows, Linux
Host Applications Many and Varied
Replication Type Remote
Number of DMS and model 10x DMS8000
Insertion Method Storage Side / Zoning
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Challenges

  • Migrate multiple petabytes of data with zero downtime for deployment — one-time insertion only — and no existing production FC ports can be touched

  • Large number of client hosts (over 500) in a large enterprise environment running diverse mix of OS’, including different versions of AIX

  • Over 20,000 LUNs over four storage arrays, presented to 2300 initiators on 586 hosts

  • Selected client hosts and LUNs will NOT be migrated to the new site

  • Data center relocation is from one country to another

Solution

  • Zero-touch storage-side DMS insertion was used on dedicated migration ports on the array to avoid touching any production ports

  • Surgical zoning and LUN masking changes were used to deliver sets of LUNs for migration with zero downtime necessary for client hosts

  • TCP/IP-based DMS remote replication feature with compression optimized bandwidth between countries

Results

  • A unified migration solution was provided without any need to worry about the client host platform

  • Multiple pairs of DMS8000’s were deployed to migrate the LUNs over several “waves” or batches

  • DMS storage-side insertion on the array’s dedicated migration ports met the “no-touch” requirement, with no impact to existing paths

  • Sets of LUNs were migrated using the DMS paths with out any additional need to go on-site for cabling changes

  • Remarkable performance was achieved — over 500Mbytes/sec with just a single gigabit link, due to a 5:1 compression ratio

The Story

The financial group represented here had recently completed a major bank merger in Europe. DMS was brought in to consolidate two large data centers in Vienna, Austria to a new data center in Italy. Four EMC arrays with 64 active FC ports were in active production in Austria, and since the customer had a unique “no-touch” policy in regard to the migration, a unique insertion approach was decided upon where the free storage controller ports normally used for migration purposes would be used for DMS insertion.

Under normal circumstances, no zoning or configuration changes are necessary when using DMS. However, due to the unique situation presented with this financial group and their no-touch policies, the Cirrus Data technology partner performing the migration decided that precise zoning would be implemented to allow access from the migration controller ports on the storage arrays to the DMS and destination storage rather than putting the DMS in-line.

CDS and its partner proactively came up with a worry-free solution that allowed for zero-touch storage-side data migration and adhered to the bank’s unique “no touch” policy.

The insertion and migration process was seamless, and with such a huge number of client hosts and associated LUNs being migrated, the operation was split into multiple waves, where each wave targeted a group of hosts using a particular application.

The migration team performed detailed and careful analysis of storage and switch reports generated by the DMS, identified possible challenges and issues from those reports, and was able to evaluate the feasibility and provide solutions before any actual tasks were performed.

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