Storage Management Strategies for the CIO
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The team recommended, and management accepted, moving open-systems backup off the existing ATL to tapeless TSM in conjunction with SATA arrays. At the same time, L.L.Bean opted to go with Linux over AIX. It would deploy two TSM servers, one for production backup and one for testing/development.
With the open-systems backup decided, the team turned its attention to mainframe backup. Here the team's main concern was its reliance solely on SRDF to mirror the data to its remote backup site. Under conditions like rolling disasters caused by a security breach or human error, the company could experience data integrity issues due to the synchronous mirroring of corrupted data.
"We realized we could add EMC TimeFinder/Clone to eliminate rolling disasters," notes Rideout. The company would continue using HSM to back up data, even with SRDF and TimeFinder pumping out copies of the data to the remote site. TimeFinder's consistency group capability would also protect the production SRDF DASD against a rolling DASD disaster, as well as maintain data coherency across TimeFinder-protected application and database volumes (see "L.L.Bean's backup objectives," this page).
"The combination of SRDF and TimeFinder will work very well in L.L.Bean's situation," says Greg Schulz, founder and senior analyst at The StorageIO Group in Stillwater, MN. "If they want even more protection, they could add something like one of the GoldenGate Software [Inc.]
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products." GoldenGate captures changes to database data before they hit data buffers, logs or disk.
This was first published in April 2007
L.L.Bean's backup objectives
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