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nfsstat(1m)

Name
     nfsstat - NFS statistics

Synopsis
     nfsstat [-cnrsza] [-T u | d ] [-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  informa-
         tion,  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 retransmis-
         sion.

         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.


     -T u | d
         Display a time stamp.

         Specify u for a printed representation of  the  internal
         representation of time. See time(2). Specify d for stan-
         dard date format. See date(1).


     -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  dupli-
         cates.


     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  verif-
         ier 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:

     forcedirectio
         Data transferred directly  between  client  and  server,
         with no buffering on client.


     grpid
         BSD   group   id   inheritance.   See   description   in
         mount_nfs(1M).

     hard
         Hard mount.


     intr
         Interrupts allowed on hard mount.


     llock
         Local locking being used (no lock  manager).  Note  that
         this is a private interface.


     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.


     readdironly
         Use readdir instead of readdirplus.


     referral
         Mounted automatically by means of the  referral  mechan-
         ism.


     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 output 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  informa-
     tion:

     currserver
         Which server is currently providing NFS service. See the
         Managing   Network   File   Systems  in  Oracle  Solaris
         11.3 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   mil-
         liseconds.


     dev
         Estimated deviation, in milliseconds.

     srtt
         The value for the  smoothed  round-trip  time,  in  mil-
         liseconds.

Exit Status
     The following exit values are returned:

     0
         Successful completion.


     >0
         An error occurred.

Attributes
     See attributes(5) for descriptions of the  following  attri-
     butes:



     tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)  ATTRI-
     BUTE    TYPEATTRIBUTE   VALUE   _   Availabilitysystem/file-
     system/nfs

See Also
     mount_nfs(1M), attributes(5)


     Installing Oracle Solaris 11.3 Systems


     Managing Network File Systems in Oracle Solaris         11.3
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