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Configuring Paths and Ports to Establish Connections among Secondary
Storage Systems .........................................................................3-22
Creating Remote Command Devices to Establish Connections among
Secondary Storage Systems .........................................................3-22
Interoperability with Other Products and Functions ............................................3-23
Virtual LVI................................................................................................3-25
Cache Residency Manager.........................................................................3-25
ShadowImage for z/OS
®
...........................................................................3-25
Using At-Time Split Function When Combining URz with
ShadowImage for z/OS
®
(SIz).............................................................3-32
TCz Synchronous (3DC Cascading Configuration) ........................................3-34
Basic Behavior ...................................................................................3-35
Hardware Configuration......................................................................3-37
Setup Procedure ................................................................................3-37
Transferring Business Tasks Back to the Primary Site ............................3-38
TCz Synchronous (3DC Multi-target Configuration) ......................................3-39
Hardware Configuration......................................................................3-41
Setup Procedure ................................................................................3-42
Requirements for Creating URz Pair for Delta Resync Operation.............3-43
Requirements for Performing Delta Resync Operation ...........................3-43
Changing to 3DC Multi-target Configuration after Recovering from
Primary Site Failures ....................................................................3-45
Transferring Business Tasks from TCz Secondary Site to the Primary
Site (in 3DC Cascading Configuration) ...........................................3-46
Transferring Business Tasks from TCz Secondary Site to the Primary
Site (in 3DC Multi-target Configuration)........................................3-47
Transferring Business Tasks from TCz Secondary Site to the Primary
Site (When Delta Resync Operation is Performed in 3DC
multi-target configuration) ...........................................................3-48
Recovering from Failures in the Primary Site and the TCz Synchronous
Secondary Site ............................................................................
3-51
Transferring Business Tasks from the URz Secondary Site to the
Primary Site ................................................................................
3-52
Planning of Journal Volumes ............................................................................3-55
Computing Required Data Transfer Speeds for Journal Volumes ...................3-55
Planning RAID Group Configuration and Journal Group Configuration............3-56
Arranging Journal Volumes........................................................................3-57
Computing the Journal Volume Capacity.....................................................3-57
Planning Data Transfer Speed before Reversing Data Volumes .....................3-59
Contributing Factors for Data Transfer Speed between Storage Systems..............3-59
Bandwidth for Data Transfer Paths.............................................................3-60
DKC Journal Transfer Speed ......................................................................3-60
Configuration that TagmaStore USP/NSC and USP V is Connected.......................3-60
System Option Mode.................................................................................3-61