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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240 IBM TotalStorage Enterprise Storage Server: Implementing ESS Copy Services with IBM eServer zSeries
However, if SDM is located at the secondary site, data that has been read from the
primary site ESS cache and stored in SDM buffers is not lost if the primary site
subsequently suffers an outage. Although the data has not been hardened on disk, a copy
of it still exists in SDM storage, and thus can be journaled from there. If the primary site
suffers an outage, only the records that were updated in ESS cache and not read into
SDM storage would be lost.
Performance:
The primary site ESS and SDM use special communications to transfer data so ...
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