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IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
book

IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning

by Cathy Warrick, Craig Gordon, Benoit Granier, Keitaro Imai, Rosemary McCutchen, Brannen Proctor, Jim Sedgwick, Paulus Usong, Mary Ann Vandermark, John Wickes
December 2005
Intermediate to advanced content levelIntermediate to advanced
530 pages
18h 34m
English
IBM Redbooks
Content preview from IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
464 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
14.5.3 Consistency Group drain time
Once the Consistency Group is established at the primary storage servers by establishing
corresponding bitmaps within the coordination time window, all remaining data which is still in
the
out-of-sync bitmap is sent to the secondary storage server using Global Copy. This
process is thus
draining the contents of the previous Consistency Group to the remote server.
This
drain period is the time required to replicate all remaining data for the Consistency
Group from the primary to the secondary storage server. This needs to fall within a time limit
set by
maximum drain time which may also be limited. The default is 30 seconds and this ma
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ISBN: 0738494119Purchase book