Sun StorEdge Availability Suite Volume Set (Sun Cluster Geographic Edition System Administration Guide)

Sun Cluster Geographic Edition System Administration Guide

Sun StorEdge Availability Suite Volume Set

Before you can define the Sun StorEdge Availability Suite 3.2.1 volume set, you must determine the following:

The data volumes to be replicated. Examples are vol-data-paris in avsdg on cluster-paris and vol-data-newyork in avsdg on cluster-newyork.
The bitmap volume that is needed for replication. Examples are vol-bitmap-paris in avsdg on cluster-paris and vol-bitmap-newyork in avsdg on cluster-newyork.
The logical host to be used exclusively for replication of the device group avsdg. Examples are 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 StorEdge Availability Suite 3.2.1 replication cannot be the same as the Sun Cluster Geographic Edition infrastructure logical host. For more information about configuring logical hostnames, see Configuring Logical Hostnames.

The volset file is located at /var/cluster/geo/avs/device-group-name-volset.ini on all the nodes of the protection group's primary cluster and secondary cluster. For example, the volset file for the device group avsdg would be 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 StorEdge Availability Suite 3.2.1 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	Specify IP.
`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` `io-groupname`	I/O group name	An I/O group name can be specified by the `g` character. The set must be configured in the same I/O group on both the primary and the secondary cluster.
C	C tag	Specifies 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/vo`l indicates a device group named `avsdg`.

Sun Cluster Geographic Edition software does not modify the value of the Sun StorEdge Availability Suite 3.2.1 parameters. The software only controls 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 StorEdge Availability Suite 3.2.1 documentation.