All hosts are running the same application.
One host communicates with the library via a single
control path. Other hosts send requests to that host
via the network.
Library Controller Library Controller
Library Controller
Library Controller
Logical
Library 1
Logical
Library 1
Logical
Library 1
Logical
Library 1
Drive
1
Drive
1
Drive
1
Drive
1
Application 1
Host 1
Host 1
Host 1
Host 2
Host 2
Host 2
Host 3
Host 3
Host 4
Host 4
Host 5
Host 5
Host 6
Host 6
Application 2
Application 3
Drive
2
Drive
2
Drive
2
Drive
2
Drive
3
Drive
3
Drive
3
Drive
3
Drive
4
Drive
4
Drive
4
Drive
4
Drive
5
Drive
5
Drive
5
Drive
5
Drive
6
Drive
6
Drive
6
Drive
6
Logical
Library 2
Logical
Library 3
The library is partitioned into separate logical libraries that
independently communicate with separate applications
via separate control paths.
a69i0016
All hosts are running the same application and
communicate with the library via a single,
common control path.
All hosts are running the same application.
Each host communicates with the same logical
library via multiple control paths. The additional
control paths reduce the possibility that a single
point of failure will affect the whole library.
Host Network
Host Network
Host Network
Windows
System i
System p
1
2
3
4
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