Previewing A Unified State Map - IBM TotalStorage NAS Gateway 500 Administrator's Manual

2. Note the cells that are different on the state maps for the device on the two
3. From a local node at the available site, you can preview the result of unifying
4. From a local node at the available site, you can unify the state maps for all

Previewing a unified state map

To preview a unified state map using the gmd_show_state command with SMIT,
do the following:
1. Run smit hageo fastpath to open the main window.
2. Click HAGEO Utilities→GeoMirror Utilities and press Enter.
3. When a remote peer is active, stop the GeoMirror device.
4. From the GeoMirror Utilities window, click Change State Map. Preview the
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NAS Gateway 500 Administrator's Guide
Point of View: Node Clam
-----------------------------------
Point of View GMD List:
-----------------------------------
Name: gmd0
Status: AVAILABLE
State Map:
Cell Value
------- ---------
0 0x3 0x3 0x3 0xf 0xf 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
16 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
The result of the same command listing the state map for the same device on a
remote peer node might be similar to the following:
State Map:
Cell Value
------- ---------
0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0xf 0xf 0xf 0xf
16 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
nodes. The view point of the local and remote nodes in our example show
different states for some cells in the same region. Since there are stale cells
(writes) on both sides, the state maps must be manually unified.
the state maps. The output shows what the unified state map should look like.
For the example case, the preview of the unified state map is the following:
State Map:
Cell Value
------- -------
0 0x3 0x3 0x3 0xf 0xf 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0xf 0xf 0xf 0xf
16 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
See "Previewing a unified state map" for additional information.
GeoMirror devices and install them on the nodes at the active site. When
communication between sites is restored, the GeoMirror devices on nodes at
the rejoining site receive the unified state map information.
Unified State Map and press Enter. A window similar to the following is
displayed: