NSR_MOUNT_REQUEST(5)NSR_MOUNT_REQUEST(5)NAMEnsr_mount_request - NetWorker resource type "NSR mount request"
SYNOPSIS
type: NSR mount request
DESCRIPTION
When a nsrmmd processes requires media for a session, e.g. save or
recover, it sends a request to nsrd. If there is no media currently
mounted which meets the requirements of the nsrmmd process, nsrd starts
a nsrjb command to mount media. Before nsrd starts the nsrjb command a
resource of the type NSR mount request is created. The resource exists
until the corresponding nsrjb command exits. This resource and all its
attributes are read only. A resource of this type may not be created or
deleted using any administrative interface. See nsr_resource(5) for
information on NetWorker resources. To view the NSR mount request
resources run:
nsradmin -c "type:NSR mount request"
Be sure to include quotation marks and to insert a space between "NSR",
"mount", and "request".
ATTRIBUTES
The following attributes are defined for the resource type NSR mount
request. The information in parentheses describes how the attribute
values are accessed. Read-only indicates that the value cannot be
changed by an administrator. Hidden indicates a hidden attribute of
interest only to programs or experts. These attributes can only be
seen when the hidden option is turned on in nsradmin(8). Static
attributes change values rarely, if ever. Dynamic attributes have val‐
ues that change rapidly. For example, an attribute marked (read-only,
static) has a value that is set when the attribute is created and never
changes.
name (read-only, static)
The name attribute corresponds to the instance of the nsrjb com‐
mand that was created to load the media described by this
resource. The instance of the nsrjb command is specified using
the -O command line option.
Example: name: 15;
nsrmmd id (read-only/ static)
This attribute records the number that identifies the nsrmmd
process which requested the media.
Example: nsrmmd id: 2;
nsrmmd host (read-only/static)
This attribute indicates the name of the host on which the nsr‐
mmd process which requested the media is running.
Example: nsrmmd host: host1;
nsrmmd mount id (read-only/static/null ok)
Some operations, e.g. cloning, require two nsrmmd processes and
two volumes be mounted at the same time. The value of this
attribute will be the same for all mount requests submitted by
such nsrmmd processes. When the nsrmmd which requested media is
not participating in an operation which requires another nsrmmd
process to complete, the value of this attribute is null.
It is possible that only one cooperating nsrmmd process may be
requesting media be mounted. For example, this may occur while
cloning data. If the nsrmmd writing data reaches end of media
while the nsrmmd process reading data is still has data to be
cloned, then the nsrmmd process writing data will request a new
volume be mounted.
Example: nsrmmd mount id: 5;
operation (read-only/static)
This attribute indicates the operation being performed by the
nsrmmd requesting media be mounted. The value for this attribute
attribute can be either reading, writing, or media. If the
value is set to reading, the nsrmmd process is reading data from
media. It could either be recovering data or the process that is
reading data from media as part of a cloning operation. If the
value is set to writing, the nsrmmd process is writing data to
media. It could either be saving data or the process that is
writing data to media as part of a cloning operation. If the
value is set to media, the nsrmmd is performing an operation
that involves only the media, e.g. labeling media.
Example: operation: writing;
data operation (read-only, static, null OK)
This attribute has a value when the operation attribute is set
to either reading or writing. If the operation attribute is
set to media this attribute has no value. Values for this
attribute can be either save, recover, archive, retrieve,
migrate, clone, or consolidate.
Example: data operation: save;
media operation (read-only, static)
This attribute indicates operations which are expected to be
performed on the media after it is loaded into a drive. Values
for this attribute can be either mount, label, relabel, or ver‐
ify. This attribute may have multiple values. For example media
may be labeled and then mounted.
Example: media operation: label, mount;
pool (read-only, static)
The pool to which the requested media belongs or the pool to
which the media is to be added if the media operation attribute
includes label or relabel values. Valid values for this
attribute are any currently defined pool.
Example: pool: Default;
volume (read-only, static, null OK)
This attribute records the name of the volume being mounted.
The value of the attribute is NULL if the volume name is not
known at the time the operation is started. This can occur when
labeling scratch media.
Example: volume: vol1;
client (read-write, static, null ok)
This attribute is used to record the name of the NetWorker
client from which data is being read while saving (archiving)
data or to which data is being written while recovering
(retrieving) data.
Example: client: host1;
save set (read-only, static, null ok)
This attribute specifies the data being read from client and
written to media (save) or the data read from media and written
to client (recover).
Example: save set: /usr;
group (read-only, static, null ok)
If the operation being performed by the nsrmmd which requested
the mount is the result of a command initiated by savegrp (8),
this attribute records the name of the group. Otherwise there
is no value. Valid values for this attribute are any currently
defined group.
Example: group: Default;
EXAMPLE
A complete example follows:
type: NSR mount request;
name: 10;
nsrmmd id: 2;
nsrmmd host: host1;
nsrmmd mount id: tape;
operation: writing;
data operation: save;
media operation: label, mount;
volume: vol1;
pool: Default;
client: host1;
save set: /usr;
group: Default;
FILES
/nsr/res/nsrdb - files in this directory should never be edited
directly. Use nsradmin(8), or NetWorker Management Console instead.
SEE ALSOnsr_resource(5), nsr_pool(5), nsr_group(5), nsr_service(5), nsr(8),
nsrmmd(8), nsradmin(8),
NetWorker 7.3.2 Aug 23, 06 NSR_MOUNT_REQUEST(5)
