Sun StorageTek Availability Suite Volume Sets
Before you can define a Sun StorageTek Availability Suite volume set, you must determine the following:
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The data volumes to replicate such as vol-data-paris in avsdg on cluster-paris and vol-data-newyork in avsdg on cluster-newyork.
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The bitmap volume that is needed for replication, such as vol-bitmap-paris in avsdg on cluster-paris and vol-bitmap-newyork in avsdg on cluster-newyork.
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The logical host to use exclusively for replication of the device group avsdg, such as the logical host logicalhost-paris-1 on cluster-paris and the logical host logicalhost-newyork-1 on cluster-newyork.
Note –The logical host that is used for Sun StorageTek Availability Suite replication must be different from the Sun Cluster Geographic Edition infrastructure logical host. For more information, see Configuring Logical Hostnames in Sun Cluster Geographic Edition System Administration Guideabout configuring logical hostnames.
The volset file is located at /var/cluster/geo/avs/devicegroupname-volset.ini on all nodes of the primary and secondary clusters of the protection group. For example, the volset file for the device group avsdg is located at /var/cluster/geo/avs/avsdg-volset.ini.
The fields in the volume set file that are handled by the Sun Cluster Geographic Edition software are described in the following table. The Sun Cluster Geographic Edition software does not handle other parameters of the volume set, including disk queue, size of memory queue, and number of asynchronous threads. You must adjust these parameters manually by using Sun StorageTek Availability Suite commands.
|
Field |
Meaning |
Description |
|---|---|---|
|
phost |
Primary host |
The logical host of the server on which the primary volume resides. |
|
pdev |
Primary device |
Primary volume partition. Specify full path names only. |
|
pbitmap |
Primary bitmap |
Volume partition in which the bitmap of the primary partition is stored. Specify full path names only. |
|
shost |
Secondary host |
The logical host of the server on which the secondary volume resides. |
|
sdev |
Secondary device |
Secondary volume partition. Specify full path names only. |
|
sbitmap |
Secondary bitmap |
Volume partition in which the bitmap of the secondary partition is stored. Specify full path names only. |
|
ip |
Network transfer protocol |
IP address. |
|
sync | async |
Operating mode |
sync is the mode in which the I/O operation is confirmed as complete only when the volume on the secondary cluster has been updated. async is the mode in which the primary host I/O operation is confirmed as complete before updating the volumes on the secondary cluster. |
|
g iogroupname |
I/O group name |
An I/O group name. The set must be configured in the same I/O group on both the primary and the secondary cluster. This parameter is optional and need only be configured if you have an I/O group. |
|
C |
C tag |
The device group name or resource tag of the local data and bitmap volumes in cases where this information is not implied by the name of the volume. For example, /dev/md/avsset/rdsk/vol indicates a device group named avsset. As another example, /dev/vx/rdsk/avsdg/vol indicates a device group named avsdg. |
The Sun Cluster Geographic Edition software does not modify the value of the Sun StorageTek Availability Suite parameters. The software controls only the role of the volume set during switchover and takeover operations.
For more information about the format of the volume set files, refer to the Sun StorageTek Availability Suite documentation.
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