July 2004
Intermediate to advanced
496 pages
16h 46m
English
book
IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
by Cathy Warrick, Paul Jenkin, Claus Schiefer, Jiri Spacek
Content preview from IBM TotalStorage Enterprise Storage Server Implementing ESS Copy Services with IBM eServer zSeries
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276 IBM TotalStorage Enterprise Storage Server: Implementing ESS Copy Services with IBM eServer zSeries
6.4 Concurrent Copy operation
For the Concurrent Copy process, we must distinguish between the logical completion of the
copy and the
physical completion. The copy process is logically complete when the System
Data Mover has figured out what to copy. This is a very short process. After the logical
completion, updates to the source are allowed while the System Data Mover, in cooperation
with the ESS, ensures that the copy reflects at all times the state of the data at the time that
Concurrent Copy was invoked.
The System Data Mover (SDM), a DFSMS/MVS component, reads the data from the source
(volume or data set) and copies it to the target. ...
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