vos_examine - Online in the Cloud

PROGRAM:

NAME

vos_examine - Shows volume header and VLDB entry information for a volume

SYNOPSIS

vos examine -id <volume name or ID> [-extended]
[-format] [-cell <cell name>]
[-noauth] [-localauth] [-verbose]
[-encrypt] [-noresolve] [-help]

vos e -i <volume name or ID> [-ex] [-f]
[-c <cell name>]
[-noa] [-l] [-v] [-e] [-nor] [-h]

vos volinfo -id <volume name or ID> [-extended]
[-format] [-cell <cell name>]
[-noauth] [-localauth] [-verbose]
[-encrypt] [-noresolve] [-help]

vos v -i <volume name or ID> [-ex] [-f]
[-c <cell name>]
[-noa] [-l] [-v] [-e] [-nor] [-h]

DESCRIPTION

The vos examine command formats and displays information from the Volume Location Database
(VLDB) entry and the volume header of the volume specified by the -id argument.

To display the volume header only, use the vos listvol command. To display information
from the VLDB only, use the vos listvldb command.

CAUTIONS

Currently, the maximum quota for a volume is 2 terabytes (2^41 bytes). Note that this only
affects the volume's quota; a volume may grow much larger if the volume quota is disabled.
However, volumes over 2 terabytes in size may be impractical to move, and may have their
size incorrectly reported by some tools, such as fs_listquota(1).

OPTIONS

-id <volume name or ID>
Specifies either the complete name or volume ID number of the volume, which can be
read/write, read-only, or backup.

-extended
Displays statistics about read and write operations on files and directories in the
volume.

-format
Shows information in a format suitable for machine parsing.

-cell <cell name>
Names the cell in which to run the command. Do not combine this argument with the
-localauth flag. For more details, see vos(1).

-noauth
Assigns the unprivileged identity "anonymous" to the issuer. Do not combine this flag
with the -localauth flag. For more details, see vos(1).

-localauth
Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile
file. The vos command interpreter presents it to the Volume Server and Volume Location
Server during mutual authentication. Do not combine this flag with the -cell argument
or -noauth flag. For more details, see vos(1).

-verbose
Produces on the standard output stream a detailed trace of the command's execution. If
this argument is omitted, only warnings and error messages appear.

-encrypt
Encrypts the command so that the operation's results are not transmitted across the
network in clear text. This option is available in OpenAFS versions 1.4.11 or later
and 1.5.60 or later.

-noresolve
Shows all servers as IP addresses instead of the DNS name. This is very useful when
the server address is registered as 127.0.0.1 or when dealing with multi-homed
servers. This option is available in OpenAFS versions 1.4.8 or later and 1.5.35 or
later.

-help
Prints the online help for this command. All other valid options are ignored.

OUTPUT

The first seven lines of the output show information from the volume header and the
remaining lines come from the VLDB. Each item in the following list corresponds to a line
of output derived from the volume header.

· Basic information about the specified volume (displayed on a single line):

· Name

· Volume ID number

· Type (the flag is "RW" for read/write, "RO" for read-only, "BK" for backup)

· Size in kilobytes (1024 equals a megabyte)

· Number of files in the volume, if the -extended flag is provided

· Status on the file server machine, which is one of the following:

On-line
The volume is completely accessible to Cache Managers.

Off-line
The volume is not accessible to Cache Managers, but does not seem to be
corrupted. This status appears while a volume is being dumped, for example.

Off-line**needs salvage**
The volume is not accessible to Cache Managers, because it seems to be
corrupted. Use the bos salvage or salvager command to repair the corruption.

· The file server machine and partition that house the volume, as determined by the
command interpreter as the command runs, rather than derived from the VLDB or the
volume header.

· The volume ID numbers associated with the various versions of the volume: read/write
("RWrite"), read-only ("ROnly"), backup ("Backup"), and ReleaseClone ("RClone"). One
of them matches the volume ID number that appears on the first line of the volume's
output. If the value in the "RWrite", "ROnly", or "Backup" field is 0 (zero), there is
no volume of that type. If there is currently no ReleaseClone, the "RClone" field does
not appear at all.

· The maximum space quota allotted to the read/write copy of the volume, expressed in
kilobyte blocks in the "MaxQuota" field.

· The date and time the volume was created, in the "Creation" field. If the volume has
been restored with the backup diskrestore, backup volrestore, or vos restore command,
this is the restore time. For a read-only volume, this is the last release time.

· The date and time this copy of this volume was created, in the "Copy" field. This is
the time when the volume was created on this server and partition. For read-only
volumes, it is not updated by a release (unlike the Creation date). The copy date is
not stored in volume dumps.

· The date and time when the contents of the volume last changed, in the "Last Update"
field. For read-only and backup volumes, it matches the timestamp in the "Creation"
field.

· The number of times the volume has been accessed for a fetch or store operation since
the later of the two following times:

· 12:00 a.m. on the day the command is issued

· The last time the volume changed location

When the -extended flag is included, two tables appear next:

· The table labeled "Raw Read/Write Stats" contains information on the number of reads
(fetches) and writes (stores) made on the specified volume.

· The table labeled "Writes Affecting Authorship" contains information on writes made to
files and directories in the specified volume.

If the following message appears instead of the previously listed information, it
indicates that a volume is not accessible to Cache Managers or the vos command
interpreter, for example because a clone is being created.

**** Volume <volume_ID> is busy ****

If the following message appears instead of the previously listed information, it
indicates that the File Server is unable to attach the volume, perhaps because it is
seriously corrupted. The FileLog and VolserLog log files in the /var/log/openafs directory
on the file server machine possibly provide additional information; use the bos getlog
command to display them.

**** Could not attach volume <volume_ID> ****

Following a blank line, information from the VLDB entry appears. Each item in this list
corresponds to a separate line in the output:

· The base (read/write) volume name. The read-only and backup versions have the same
name with a ".readonly" and ".backup" extension, respectively.

· The volume ID numbers allocated to the versions of the volume that actually exist, in
fields labeled "RWrite" for the read/write, "ROnly" for the read-only, "Backup" for
the backup, and "RClone" for the ReleaseClone. (If a field does not appear, the
corresponding version of the volume does not exist.) The appearance of the "RClone"
field normally indicates that a release operation did not complete successfully; the
"Old release" and "New release" flags often also appear on one or more of the site
definition lines described just following.

· The number of sites that house a read/write or read-only copy of the volume, following
the string "number of sites ->".

· A line for each site that houses a read/write or read-only copy of the volume,
specifying the file server machine, partition, and type of volume ("RW" for read/write
or "RO" for read-only). If a backup version exists, it is understood to share the
read/write site. Several flags can appear with a site definition:

Not released
Indicates that the vos release command has not been issued since the vos addsite
command was used to define the read-only site.

Old release
Indicates that a vos release command did not complete successfully, leaving the
previous, obsolete version of the volume at this site.

New release
Indicates that a vos release command did not complete successfully, but that this
site did receive the correct new version of the volume.

· If the VLDB entry is locked, the string "Volume is currently LOCKED", as well as (in
OpenAFS 1.5.75 and later) one or more of the following strings:

Volume is locked for a move operation
Indicates that the volume was locked due to a vos move or a vos convertROtoRW
command.

Volume is locked for a release operation
Indicates that the volume was locked due to a vos release command.

Volume is locked for a backup operation
Indicates that the volume was locked due to a vos backup command.

Volume is locked for a delete/misc operation
Indicates that the volume was locked due to a vos delentry, vos addsite, vos
remsite, vos changeloc, vos syncvldb, vos syncserv, vos rename, or vos lock
command.

Volume is locked for a dump/restore operation
Indicates that the volume was locked due to a vos dump or vos restore command.

For further discussion of the "New release" and "Old release" flags, see vos_release(1).

EXAMPLES

The following example shows output for the ABC Corporation volume called "usr" with two
read-only replication sites (this volume is mounted at the /afs/abc.com/usr directory).
For the sake of illustration, the output shows the volume as locked.

% vos examine usr
usr 536870981 RW 3459 K On-line
fs2.abc.com /vicepb
RWrite 5360870981 ROnly 536870982 Backup 536870983
MaxQuota 40000 K
Creation Mon Jun 12 15:22:06 1989
Copy Mon Jun 12 15:22:06 1989
Last Update Fri Jun 16 09:34:35 1989
5719 accesses in the past day (i.e., vnode references)
RWrite: 5360870981 ROnly: 536870982 Backup: 536870983
number of sites -> 3
server fs1.abc.com partition /vicepa RO Site
server fs3.abc.com partition /vicepa RO Site
server fs2.abc.com partition /vicepb RW Site
Volume is currently LOCKED

The following example shows the output for the volume "user.terry" using the -extended
flag. The volume has no read-only replication sites.

% vos examine -id user.terry -extended
user.terry 354287190 RW 2302 K used 119 files On-line
fs4.abc.com /vicepc
RWrite 354287190 ROnly 0 Backup 354287192
MaxQuota 5000 K
Creation Wed Nov 25 17:38:57 1992
Copy Wed Nov 25 17:38:57 1992
Last Update Tue Dec 15 10:46:20 1992
598 accesses in the past day (i.e., vnode references)
Raw Read/Write Stats
|-------------------------------------------|
| Same Network | Diff Network |
|----------|----------|----------|----------|
| Total | Auth | Total | Auth |
|----------|----------|----------|----------|
Reads | 55 | 55 | 38 | 38 |
Writes | 95 | 95 | 0 | 0 |
|-------------------------------------------|
Writes Affecting Authorship
|-------------------------------------------|
| File Authorship | Directory Authorship|
|----------|----------|----------|----------|
| Same | Diff | Same | Diff |
|----------|----------|----------|----------|
0-60 sec | 38 | 0 | 21 | 1 |
1-10 min | 2 | 0 | 7 | 0 |
10min-1hr | 0 | 0 | 1 | 0 |
1hr-1day | 1 | 0 | 5 | 1 |
1day-1wk | 0 | 0 | 0 | 0 |
> 1wk | 0 | 0 | 0 | 0 |
|-------------------------------------------|
RWrite: 354287190 Backup: 354287192
number of sites -> 1
server fs4.abc.com partition /vicepc RW Site

PRIVILEGE REQUIRED

None

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