SAVEFS(8)SAVEFS(8)NAMEsavefs - save filesystem to a NetWorker server
SYNOPSISsavefs [ options ] filesystem
savefs-p [ options ] [ filesystem ... ]
options: [ -BEFnpqRv ] [ -s server ] [ -N name ] [ -g group ] [ -c
client ] [ -l level | -C schedule ] [ -e expiration ] [ -w
browse ] [ -y retention ] [ -f filename ] [ -o save_operations
] [ -W width ] [ -t date ]
DESCRIPTION
The savefs command saves a filesystem (using save(8)) to a NetWorker
server. Mount points are not crossed, and symbolic links are not fol‐
lowed. NOTE: running savefs directly is not recommended; use save‐
grp(8) instead.
A level-based system (similar to dump(8)) is used to save only those
files which have been modified since some previous save (a partial
save).
The nsr_schedule(5) for the local NetWorker client is examined to
determine the proper level of save for the current date.
The set of files saved depends on when, and at what level, previous
saves have been performed, in addition to the effects of the default
directives (see nsr_directive(5)), and the various directive files (see
nsr(5)) which are encountered while processing the filesystem.
FILESYSTEM PROBES
The savefs command may also be used to probe a client for its filesys‐
tems and recent save times. When probing, savefs does not save data,
but instead produces a machine-parsable report describing the layout of
the client's filesystems. When used with the -p probe option, the
local NetWorker client's nsr_client(5) resources are examined, and the
filesystems listed in the save set attribute are probed (if no filesys‐
tems are listed on the command line). If the save set list consists of
the keyword All, then the /etc/fstab file (/etc/vfstab on Solaris,
/etc/mnttab on SCO, and a kernel table on AIX) are examined to deter‐
mine which filesystems should be saved, making sure to save only local,
mounted filesystems.
Note that metadevices within the Sun Solaris Online DiskSuite and Logi‐
cal Volumes within the HP-UX Logical Volume Manager are treated like
independent disks. This approach allows each to be saved in its own
session, assuming sufficient parallelism.
Care should be taken when the NSR client resource explicitly lists the
save sets, for two primary reasons. First, this list must be manually
updated when new filesystems are added which need saving. Second,
since savefs only stops at the end of a path or a mount point, if you
list two save sets in the same filesystem, and one is a subdirectory of
the other, the subdirectory will be saved twice.
Filesystem arguments can be specified to limit the filesystem saves to
only those specified, but the specified filesystems must appear on some
Save Set list for this client (see the -F option).
Probes are also useful when testing how NetWorker will behave in a
clustered environment. In this setup ownership of shared filesystems
must be determined, and performing a probe with the verbose option set
allows one to examine the default ownership rules. Refer to pathowner‐
ignore(5) for a description of path-ownership rules.
OPTIONS-B Force save of all connecting directory information from root
(``/'') down to the point of invocation. This option is used by
savegrp(8), for example, when saving the server's bootstrap
information.
-c client
The name of the client whose filesystem needs to be saved. This
option is especially needed in a cluster environment where a
physical host can represent its own hostname as well as host‐
names of any virtual (also known as "logical") hosts that exist
in this physical host. Without this option, the hostname of the
physical host is assumed by default. This option is required if
a filesystem that belongs to any of the virtual hosts needs to
be saved.
-C schedule
The name of the schedule (see nsr_schedule(5)) to use when auto‐
matically determining the save level. If this option is not
specified, savefs uses the schedule named by the NSR client
resource for the specified filesystem.
-e expiration
Set the date (in nsr_getdate(3) format) when the saved data will
expire. When a save set has an explicit expiration date, the
save set remains both browsable and non-recyclable until it
expires. After it expires and it has passed its browse time,
its state will become non-browsable. If it has expired and it
has passed its retention time, the save set will become recy‐
clable. The special value forever is used to indicate that a
volume that never expires (i.e. an archive volume) must be used.
By default, no explicit expiration date is used.
-w browse
Sets the date (in nsr_getdate(3) format) after which this save
set will no longer be browsable. By default, the server deter‐
mines the browse date for the save set based on the browse poli‐
cies in effect. This option allows overriding the existing
policies on a save by save basis.
-y retention
Sets the date (in nsr_getdate(3) format) when the saved data
will become recyclable. By default, the server determines this
date for the save set based on the retention policies in effect.
-E Estimate. Before saving any data, browse the filesystem trees
to be saved and accurately estimate the amount of data that will
be generated. Without this flag, the estimate size is zero.
This flag consumes an amount of time proportional to the number
of files in each filesystem. This is because the entire direc‐
tory is browsed before any saving begins and browsed again when
actually saving the directory, but the file data is only read
from the disk the last time. In many cases, the overhead for
using this flag is small and is well-justified.
-f filename
The file from which application specific modules (or ASMs)
should take their directives (see nsr(5)). By default, these
are taken from the NSR directive resource named by the directive
attribute in the NSR client resource for each client (see
nsr_directive(5)).
-F Force. Save every argument like a filesystem, even if it is not
listed in fstab(5) or nsr_client(5).
-g group
Restrict the scope of the client to a particular group. If this
option is not specified, save sets from all instances of the NSR
client resource for this client will be used, regardless of the
group. This value is also passed on to save(8), which uses it
to select a specific media pool.
-l level
The level of save to perform. There are 12 levels: full, levels
1 through 9, incr, and skip. Full specifies that all files are
to be saved. It is analogous to a level 0 dump in dump(8).
Incr specifies incremental saves in which only those files that
have been modified since the most recent save, at any level, are
saved. This level has no exact analogue in dump(8) since the
last save at any level, including previous incremental saves,
are considered when determining what to save. Skip causes no
files to be saved. The levels 1 through 9 cause all files to be
saved which have been modified since any lower level save was
performed. As an example, if you did a full save on Monday,
followed by a level 3 save on Tuesday, a subsequent level 3 save
on Wednesday would contain all files modified or added since the
Monday full save. By default, the save level is determined
automatically from the NetWorker client's schedule (see
nsr_schedule(5)). By using the history of previous saves main‐
tained by nsrmmd(8) on the NetWorker server, the needed time for
the given level can correctly be computed. By using media
information on the server, times computed for saves that are
based on previous save levels will automatically be adjusted as
required when tapes are deleted.
-n No save. Accurately estimates the amount of data that would be
generated (as described for -E, but doesn't save any data.
-N name
The symbolic name this set of saves is to be known by. By
default, the first filesystem argument is used as the name.
-p List the name of the filesystems, the level of save that would
be performed, and the time since which files must have been mod‐
ified to be saved, but don't actually do the save. This infor‐
mation is gleaned from the /etc/fstab file (or another operating
system specific file, as described above) and the nsr_sched‐
ule(5).
-q Quiet. Display only summary information and error messages.
-qq Really quiet. Display only error messages.
-R Cause savefs to report on its success or failure, by echoing a
simple "succeeded" or "failed" message. This is used by save‐
grp(8) when it is running savefs.
-s server
Specifies which machine to use as the NetWorker server. See
nsr(8) for the algorithm NetWorker uses to choose a server when
none is specified.
-t date
The date (in nsr_getdate(3) format) from which to base schedule
level calculations. If not specified, the current time is used.
-o save_operations
Save Operations of the form KEYWORD:TOKEN=STATE. It is used to
configure VSS saves on Windows 2003. Examples:
"vss:*=off" Turn off VSS.
"vss:Microsoft Exchange Writer=off" Disable a writer.
"vss:C:=off" Disable VSS for a drive.
Please see the Admin Guide for more details.
-v Verbose.
Causes lots of debugging style output.
This option is also used by
savegrp(8)
when it is probing for the capabilities of the client's
savefs,
for supporting multiple versions.
-W width
The width used when formatting output or notification messages.
By default,
this is 80.
RESOURCE TYPES
NSR client
These resources specify the client's save sets, default sched‐
ule, and directives to use when saving them.
NSR directive
A resource of this type is named by the directive attribute in
each NSR client resource. These are the directives used for the
save sets specified in the associated NSR client resource.
NSR schedule
A resource of this type is named by the schedule attribute in
each NSR client resource. This is the schedule used for the
save sets specified in the associated NSR client resource.
FILES
/etc/fstab
If All is specified in the save set attribute for a NSR client
resource, then the list of local filesystems is taken from this
file.
/etc/vfstab
Solaris only. The same as /etc/fstab on other operating sys‐
tems.
/etc/mnttab
SCO only. The same as /etc/fstab on other operating systems.
SEE ALSOnsr_getdate(3), fstab(5), mnttab(F) (SCO only), vfstab(5) (Solaris
only), nsr(5), nsr_service(5), nsr_schedule(5), dump(8), nsr(8),
nsrd(8), nsrindexd(8), nsrmmd(8), recover(8), save(8), savegrp(8),
pathownerignore(5).
DIAGNOSTICS
Exit Codes
0 Normal exit.
255 Abnormal exit.
NetWorker 7.3.2 Aug 23, 06 SAVEFS(8)
