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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Chapter 6. Concurrent Copy 275
Concurrent Copy domain
The set of devices and tracks identified during the initialization of a Concurrent Copy session
is called the Concurrent Copy domain. It represents the set of data that Concurrent Copy
copies.
Intercepted writes
When an application tries to update information that is included in a Concurrent Copy domain,
the ESS intercepts those writes, thus maintaining a copy of the data as it was at the time
when the Concurrent Copy was requested.
Sidefile
A sidefile is a temporary repository for Concurrent Copy domain tracks that still have not been
copied by the SDM and are about to receive an update. During the processing of an
intercepted write, the ESS copies a before-image of the track being updated ...
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