from small one page howto to huge articles all in one place
 

search text in:





Poll
Which kernel version do you use?





poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs

words:

887

views:

99184

userrating:

average rating: 1.7 (84 votes) (1=very good 6=terrible)


May 25th. 2007:
Words

486

Views

214359

why adblockers are bad


Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

95415

userrating:

average rating: 1.3 (28 votes) (1=very good 6=terrible)


April, 26th. 2006:

Druckversion
You are here: manpages





NFSIOSTAT-SYSSTAT

Section: Linux User's Manual (1)
Updated: JANUARY 2014
Index Return to Main Contents
 

NAME

nfsiostat-sysstat (the nfsiostat command from the sysstat package) - Report input/output statistics for network filesystems (NFS).  

SYNOPSIS

nfsiostat-sysstat [ -h ] [ -k | -m ] [ -t ] [ -V ] [ --debuginfo ] [ interval [ count ] ]  

DESCRIPTION

The nfsiostat-sysstat command displays statistics about read and write operations on NFS filesystems.

The interval parameter specifies the amount of time in seconds between each report. The first report contains statistics for the time since system startup (boot). Each subsequent report contains statistics collected during the interval since the previous report. A report consists of an NFS header row followed by a line of statistics for each network filesystem that is mounted. The count parameter can be specified in conjunction with the interval parameter. If the count parameter is specified, the value of count determines the number of reports generated at interval seconds apart. If the interval parameter is specified without the count parameter, the nfsiostat-sysstat command generates reports continuously.

 

REPORT

The Network Filesystem (NFS) report provides statistics for each mounted network filesystem. Transfer rates are shown in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used. The report shows the following fields:

Filesystem:

This columns shows the hostname of the NFS server followed by a colon and by the directory name where the network filesystem is mounted.

rBlk_nor/s (rkB_nor/s, rMB_nor)
Indicate the number of blocks (kilobytes, megabytes) read by applications via the read(2) system call interface. A block has a size of 512 bytes.

wBlk_nor/s (wkB_nor/s, wMB_nor/s)
Indicate the number of blocks (kilobytes, megabytes) written by applications via the write(2) system call interface.

rBlk_dir/s (rkB_dir/s, rMB_dir/s)
Indicate the number of blocks (kilobytes, megabytes) read from files opened with the O_DIRECT flag.

wBlk_dir/s (wkB_dir/s, wMB_dir/s)
Indicate the number of blocks (kilobytes, megabytes) written to files opened with the O_DIRECT flag.

rBlk_svr/s (rkB_svr/s, rMB_svr/s)
Indicate the number of blocks (kilobytes, megabytes) read from the server by the NFS client via an NFS READ request.

wBlk_svr/s (wkB_svr/s, wMB_svr/s)
Indicate the number of blocks (kilobytes, megabytes) written to the server by the NFS client via an NFS WRITE request.

ops/s
Indicate the number of operations that were issued to the filesystem per second.

rops/s
Indicate the number of 'read' operations that were issued to the filesystem per second.

wops/s
Indicate the number of 'write' operations that were issued to the filesystem per second.
 

OPTIONS

--debuginfo
Print debug output to stderr.
-h
Make the NFS report easier to read by a human.
-k
Display statistics in kilobytes per second.
-m
Display statistics in megabytes per second.
-t
Print the time for each report displayed. The timestamp format may depend on the value of the S_TIME_FORMAT environment variable (see below).
-V
Print version number then exit.

 

ENVIRONMENT

The nfsiostat-sysstat command takes into account the following environment variables:

S_TIME_FORMAT
If this variable exists and its value is ISO then the current locale will be ignored when printing the date in the report header. The nfsiostat-sysstat command will use the ISO 8601 format (YYYY-MM-DD) instead. The timestamp displayed with option -t will also be compliant with ISO 8601 format.

POSIXLY_CORRECT
When this variable is set, transfer rates are shown in 512-byte blocks instead of the default 1K blocks.

 

BUG

/proc filesystem must be mounted for nfsiostat-sysstat to work.

 

FILE

/proc/self/mountstats contains statistics for network filesystems.

 

WARNING

The nfsiostat command from the sysstat package (nfsiostat-sysstat) is now obsolete and is no longer maintained. It will be removed in a future sysstat version. Please use now the nfsiostat command from the nfs-utils package.

 

AUTHOR

Written by Ivana Varekova (varekova <at> redhat.com)

 

SEE ALSO

nfsiostat(8), sar(1), pidstat(1), mpstat(1), vmstat(8), iostat(1), cifsiostat(1)


 

Index

NAME
SYNOPSIS
DESCRIPTION
REPORT
OPTIONS
ENVIRONMENT
BUG
FILE
WARNING
AUTHOR
SEE ALSO


Please read "Why adblockers are bad".



Other free services
toURL.org
Shorten long
URLs to short
links like
http://tourl.org/2
tourl.org
.
Reverse DNS lookup
Find out which hostname(s)
resolve to a
given IP or other hostnames for the server
www.reversednslookup.org
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2017 Sascha Nitsch Unternehmensberatung UG(haftungsbeschränkt)
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 3.5 ms