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nfsstat (1)
>> nfsstat (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
nfsstat (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
nfsstat (8) ( Linux man: Команды системного администрирования )
NAME
nfsstat - NFS statistics
SYNOPSIS
nfsstat [-cnrsza] [-vversion] [interval [count]]
nfsstat-m [pathname]...
DESCRIPTION
nfsstat displays statistical information about the NFS and RPC (Remote Procedure Call), interfaces to the kernel. It can also be used to reinitialize this information. If no options are given the default is as follows:
nfsstat-csnra
The default displays everything, but reinitializes nothing.
OPTIONS
-a
Display NFS_ACL information.
-c
Display client information. Only the client side NFS, RPC, and NFS_ACL information is printed. Can be combined with the -n, -r, and -a options to print client side NFS, RPC, and NFS_ACL information only.
-m [pathname...]
Display statistics for each NFS mounted file system. If pathname is not specified, displays statistics for all NFS mounted file systems. If pathname is specified, displays statistics for the NFS mounted file
systems indicated by pathname.
This includes the server name and address, mount flags, current read and write sizes, the retransmission count, the attribute cache timeout values, failover information, and the timers used for dynamic retransmission. The dynamic retransmission timers are displayed only where dynamic retransmission
is in use. By default, NFS mounts over the TCP protocols and NFS Version 3 mounts over either TCP or UDP do not use dynamic retransmission.
If you specify the -m option, this is the only option that nfsstat uses. If you specify other options with -m, you receive an error message alerting that the -m flag cannot be combined with other options.
-n
Display NFS information. NFS information for both the client and server side are printed. Can be combined with the -c and -s options to print client or server NFS information only.
-r
Display RPC information.
-s
Display server information.
-vversion
Specify which NFS version for which to print statistics. When followed by the optional version argument, (2|3|4), specifies statistics for that version. By default, prints statistics for all versions.
-z
Zero (reinitialize) statistics. This option is for use by the super user only, and can be combined with any of the above options to zero particular sets of statistics after printing them.
OPERANDS
The following operands are supported:
count
Display only count reports
interval
Report once each interval seconds.
pathname
Specify the pathname of a file in an NFS mounted file system for which statistics are to be displayed.
DISPLAYS
The server RPC display includes the following fields:
badcalls
The total number of calls rejected by the RPC layer (the sum of badlen and xdrcall as defined below).
badlen
The number of RPC calls with a length shorter than a minimum-sized RPC call.
calls
The total number of RPC calls received.
dupchecks
The number of RPC calls that looked up in the duplicate request cache.
dupreqs
The number of RPC calls that were found to be duplicates.
nullrecv
The number of times an RPC call was not available when it was thought to be received.
xdrcall
The number of RPC calls whose header could not be XDR decoded.
The server NFS display shows the number of NFS calls received (calls) and rejected (badcalls), and the counts and percentages for the various calls that were made.
The server NFS_ACL display shows the counts and percentages for the various calls that were made.
The client RPC display includes the following fields:
calls
The total number of RPC calls made.
badcalls
The total number of calls rejected by the RPC layer.
badverfs
The number of times the call failed due to a bad verifier in the response.
badxids
The number of times a reply from a server was received which did not correspond to any outstanding call.
cantconn
The number of times the call failed due to a failure to make a connection to the server.
cantsend
The number of times a client was unable to send an RPC request over a connectionless transport when it tried to do so.
interrupts
The number of times the call was interrupted by a signal before completing.
newcreds
The number of times authentication information had to be refreshed.
nomem
The number of times the call failed due to a failure to allocate memory.
retrans
The number of times a call had to be retransmitted due to a timeout while waiting for a reply from the server. Applicable only to RPC over connection-less transports.
timeouts
The number of times a call timed out while waiting for a reply from the server.
timers
The number of times the calculated time-out value was greater than or equal to the minimum specified time-out value for a call.
The client NFS display shows the number of calls sent and rejected, as well as the number of times a CLIENT handle was received (clgets), the number of times the CLIENT handle cache had no unused entries (cltoomany), as well as a count of the various calls and their respective percentages.
The client NFS_ACL display shows the counts and percentages for the various calls that were made.
The -m option includes information about mount flags set by mount options, mount flags internal to the system, and other mount information. See mount_nfs(1M).
The following mount flags are set by mount options:
grpid
System V group id inheritance.
hard
Hard mount.
intr
Interrupts allowed on hard mount.
llock
Local locking being used (no lock manager).
noac
Client is not caching attributes.
nointr
No interrupts allowed on hard mount.
nocto
No close-to-open consistency.
retrans
NFS retransmissions.
rpctimesync
RPC time sync.
rsize
Read buffer size in bytes.
sec
sec has one of the following values:
dh
des-style authentication (encrypted timestamps).
krb5
kerberos v5-style authentication.
krb5i
kerberos v5-style authentication with integrity.
krb5p
kerberos v5-style authentication with privacy.
none
No authentication.
short
Short hand UNIX-style authentication.
sys
UNIX-style authentication (UID, GID).
soft
Soft mount.
timeo
Initial NFS timeout, in tenths of a second.
wsize
Write buffer size in bytes.
The following mount flags are internal to the system:
acl
Server supports NFS_ACL.
down
Server is down.
dynamic
Dynamic transfer size adjustment.
link
Server supports links.
mirrormount
Mounted automatically by means of the mirrormount mechanism.
printed
"Not responding" message printed.
readdir
Use readdir instead of readdirplus.
symlink
Server supports symbolic links.
The following flags relate to additional mount information:
proto
Protocol.
vers
NFS version.
The -m option also provides attribute cache timeout values. The following fields in -m ouput provide timeout values for attribute cache:
acdirmax
Maximum seconds to hold cached directory attributes.
acdirmin
Minimum seconds to hold cached directory attributes.
acregmax
Maximum seconds to hold cached file attributes.
acregmin
Minimum seconds to hold cached file attributes.
The following fields in -m output provide failover information:
currserver
Which server is currently providing NFS service. See the for additional details.
failover
How many times a new server has been selected.
noresponse
How many times servers have failed to respond.
remap
How many times files have been re-evaluated to the new server.
The fields in -m output shown below provide information on dynamic retransmissions. These items are displayed only where dynamic retransmission is in use.
cur
Current backed-off retransmission value, in milliseconds.
dev
Estimated deviation, in milliseconds.
srtt
The value for the smoothed round-trip time, in milliseconds.
EXIT STATUS
The following exit values are returned:
0
Successful completion.
>0
An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
