Attributes for DiskGroupSnap agent
Table: Required attributes
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Required attribute
|
Description |
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TargetResName
|
The name of the DiskGroup resource from the application service group.
Type-dimension: string-scalar
Example: "dgres"
|
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FDType
|
Specifies the configuration to be used for the fire drill. The possible
values for this attribute are:
The Bronze configuration uses the local host's VxVM site name as the
site to be detached from the DiskGroup. This action leaves the
DiskGroup vulnerable to site disaster since a copy of the production
volume might not be available when the fire drill is in progress.
In the Gold configuration there are at least three copies of the parent
volume available on different sites, hence, even after detaching one
site the volume is not vulnerable to site disaster while the fire drill is
in progress.
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Table: Optional attributes
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Optional attribute
|
Description |
|
FDSiteName
|
The unique VxVM site name tag for the fire drill disks. The value of
this attribute is used in conjunction with the FDType attribute and it
must be set to one of the sites registered in the main DiskGroup.
When FDType is set to the Bronze configuration, the value of
FDSiteName should either be empty or the name of the local host
VxVM site for the fire drill host. -
When FDType is set to the Gold configuration, FDSiteName
identifies a site in the DiskGroup to detach as a part of the fire
drill. If FDSiteName is left blank, the agent will choose a site to
detach based on the DiskGroup configuration. The agent chooses
a site name from the DiskGroup which is neither the production
server's site name nor the fire drill host's site name.
Table: Example FDType configurations shows the possible values of the attributes FDType and
FDSiteName and the decision taken by the agent.
|
Consider a configuration where the Production DiskGroup contains three sites: A, B, and C, and the Application service group is online on a node with local VxVM site ID is A. Fire drill is being done on another node Application service group is online on a node where local VxVM site ID is B.
Table: Example FDType configurations
|
FDType
|
Bronze |
Gold/Empty |
|
FDSitename
|
Empty |
B |
C |
Empty |
B |
C |
|
Result
|
Use B as
the site to
detach and
proceed |
Detach site
B from
DiskGroup |
Error |
Check if
there is
another
site other
than A and
B and
select it.
Else, it is
an error |
Error |
Detach site
C from the
DiskGroup |
Table: Internal attribute
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Internal attribute
|
Description |
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NumThreads
|
Number of threads used within the agent process for managing
resources. This number does not include threads used for other
internal purposes.
Do not modify this attribute for this agent.
Setting this attribute to a higher value may result in agent function
timeouts due to serialization of underlying commands.
Type and dimension: integer-scalar
Default: 1
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