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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] [-v version] [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.

    -v version

    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:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    AvailabilitySUNWnfscu

     

    SEE ALSO

    mount_nfs(1M), attributes(5)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    OPERANDS
    DISPLAYS
    EXIT STATUS
    ATTRIBUTES
    SEE ALSO


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