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What seven financial services leaders told us about AI and the mainframe

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Move only the tables this process needs, not the whole VSAM file

The new service needs a handful of columns from a VSAM file. Do we migrate the file, or leave it and copy a slice?

Move the slice the new process needs. [[product:ol-dataiq|OL DataIQ]] can create SQL tables from a [[product:ol-coreiq|OL CoreIQ]] VSAM or IMS layout, using the copybook for column types, then load that data with a batch pack. Leave the host file in place for the paths you have not retired. This is not a big-bang data migration.