NSR_POOL(5)NSR_POOL(5)NAMEnsr_pool - NetWorker resource type ``NSR pool''
type: NSR pool
Each NSR pool is described by a single resource of type NSR pool (see
nsr_resource(5)). To edit the NSR pool resources for a NetWorker
nsradmin -c "type:NSR pool"
Be careful to include the quotes and the space between ``NSR'' and
``pool''. See the nsradmin(8) manual page for more information on
using the NetWorker administration program.
These resources are used by NetWorker to determine what volumes save
sets should reside on depending upon the characteristics, for example,
Group or Level, of the save. Consult your NetWorker Administrator's
Guide for more guidelines on using pools.
There are six types of pools. Backup pools accept data from savegrp
and manual backups. Archive pools accept archive data. Data cloned
from a backup pool can be directed to a backup clone pool. Likewise,
archive data can be cloned to an archive clone pool. Similiarly, PC Ar‐
chive pools accept PC archive data. Also, PC archive data can be cloned
to a PC Archive Clone pool.
There are ten pools shipped pre-enabled with NetWorker. The Default
pool is meant to collect any backup data not directed to a pool a user
creates with selection criteria. Any archive data not directed to a
pool with selection criteria is collected in the Indexed Archive pool.
While Archive pool is the counterpart of Indexed Archive pool that does
not store index entries. When cloning data, the user must select a
destination pool for the operation. The Default clone pool is avail‐
able for users to clone backup data to. Both Indexed Archive clone
pool and Archive clone pool are available for users to clone archive
data to, with Indexed Archive clone pool designed for users to clone
indexed archives and Archive clone pool designed for cloning non-
indexed archives. The PC Archive pool is designed for the PC archive
data, whereas the PC Archive Clone is available for users to clone PC
archive data to. Similarly, the Migration and Migration Clone pools are
designed for migration data and cloning of migration data respectively.
There are also a few pools shipped with NetWorker that are not enabled
by default. The Full and NonFull pools can be used to segregate full
level backups from other backups, for example, fulls versus incremen‐
tals. The Offsite pool can be used to generate offsite backups,
because no index entries are stored for the media pool and will not be
referenced during normal recovers. Note that one can also clone media
to produce copies of data to be taken offsite. Save sets that are gen‐
erated without index entries can still be recovered using the ``Save
Set Recover'' feature of nwrecover (8) or recover(8).
The following attributes are defined for resource type NSR pool. The
information in parentheses describes how the attribute values are
accessed. Create-only indicates that the value cannot be changed after
the resource has been created. Read/write means the value can be
updated by authorized administrators. Yes/no means only a yes or no
choice is possible. Choice indicates that the value can only be
selected from a given list. Hidden means it is an attribute of inter‐
est only to programs or experts, and these attributes can only be seen
when the hidden option is turned on in nsradmin(8).
This attribute is provided for the administrator to keep any
explanatory remarks or supplementary information about the pool.
archive only (read/write, yes/no, hidden, create)
If yes is selected, only archive saves are allowed to this pool.
This hidden attribute can be modified by a user.
Example: archive only: no;
auto media verify (read/write, yes/no, choice)
If set to yes, NetWorker verifies data written to volumes from
this pool. Data is verified by re-positioning the volume to
read a portion of the data previously written to the media and
comparing the data read to the original data written. If the
data read matches the data written, verification succeeds; oth‐
erwise it fails. Media is verified whenever a volume becomes
full while saving and it is necessary to continue onto another
volume, or when a volume goes idle because all save sets being
written to the volume are complete. When a volume fails verifi‐
cation, it is marked full so NetWorker will not select the vol‐
ume for future saves. The volume remains full until it is recy‐
cled or a user marks it not full. If a volume fails verifica‐
tion while attempting to switch volumes, all save sets writing
to the volume are terminated.
Example: auto media verify: yes;
clients (read/write, choice)
What clients (nsr_client(5)) are allowed in this pool. If a
group is specified, only clients that are members of that group
are allowed to be listed.
Example: clients: mars;
devices (read/write, choice)
This attribute lists the ONLY devices that volumes from this
pool are allowed to be mounted onto. If no devices are listed,
volumes from this pool may be mounted on any device.
Example: devices: /dev/nrst8;
groups (read/write, choice)
What groups (nsr_group(5)) are allowed in this pool.
Example: groups: Accounting;
label template (read/write, choice)
Determine what label template (nsr_label(5)) is referenced when
generating volume names for this pool.
Example: label template: Accounting;
levels (read/write, choice)
What levels (nsr_schedule(5)) are allowed in this pool.
Example: levels: full;
The names of pool resources are used when labeling volumes and
when determining what volumes a save set should reside on. The
name can be chosen at the administrator's convenience, but it
must be unique for this NetWorker server. The pool resources
named Default, Default Clone, Indexed Archive, Indexed Archive
Clone, Archive, Archive Clone, PC Archive, and PC Archive Clone
cannot be modified or deleted. The pool resource named Full and
NonFull cannot be deleted. Other pools can only be deleted if
no volumes still reference them.
Example: name: Accounting;
recycle from other pools (read/write, yes/no, choice)
This attribute determines whether or not a given pool can recy‐
cle volumes from other pools when it exhausts all its write-able
and recyclable volumes.
Example: recycle from other pools: yes;
recycle to other pools (read/write, yes/no, choice)
This attribute determines whether or not a given pool allows
other pools to recycle its recyclable volume for their use.
Example: recycle to other pools: yes;
retention policy (read/write, choice)
This attribute specifies the name of the policy controlling how
long entries will remain in the media index before they are
marked as recyclable. The default value is blank meaning there
is no pool policy. In the absense of a pool policy the client
policy is used to determine the save set expiration date. A
defined pool policy is always considered if it is a not the only
instance of the save set (a clone). The pool policy is consid‐
ered for original save sets but is utilized only if the period
defined by the policy is longer the retention policy's period
defined by the client resource, see nsr_policy(5).
Example: retention policy: Year;
save sets (read/write, choice)
What save sets (nsr_client(5)) are allowed in this pool. Save
sets can be matched using the regular expression matching algo‐
rithm described in nsr_regexp(5)).
Example: save sets: /, /usr, C:\\windows\\system, *.JPG ;
status (read/write, hidden, choice)
If set to enabled, this pool is considered for determining what
pools a save set should be saved to when performing backup vol‐
ume selection. If set to clone, this pool is considered only as
the destination of cloning operations. If set to disabled, this
pool is completely ignored. This hidden attribute can be modi‐
fied by a user.
Example: status: enabled;
store index entries (read/write, yes/no, choice)
If set to yes, entries are made into the file indexes for the
backups. Otherwise, only media database entries for the save
sets are created.
Example: store index entries: yes;
volume type preference (read/write, choice)
This attribute is used as a selection factor when a request is
made for a write-able volume. The preferred type will be con‐
sidered first within a priority level such as jukebox or stand
alone device .
Example: volume type preference: 4mm;
max parallelism (read/write, hidden)
This attribute can be used to impose an upper limit for the num‐
ber of parallel sessions saving to a media belonging to the
pool. Fewer parallel save session written to media reduces the
time required to recover data from a saveset. Value of zero
imposes no limit on number of parallel save sessions written to
media belonging to this pool.
mount class (read/write)
This attribute is kept for historical reasons only. It has no
A complete NSR pool resource, named `Default', follows:
type: NSR pool;
archive only: No;
auto media verify: Yes;
label template: Default;
pool type: Backup;
save sets: ;
store index entries: Yes;
recycle from other pools: Yes;
recycle to other pools: Yes;
retention policy: ;
volume type preference: 4mm;
SEE ALSOnsr(5), nsr_label(5), nsr_resource(5), nsradmin(8), nwrecover(8),
recover(8), savegroup(8), savefs(8), uasm(8)NetWorker 7.3.2 Aug 23, 06 NSR_POOL(5)