nfstest_io (1) - Linux Manuals

nfstest_io: I/O tool

NAME

nfstest_io - I/O tool

SYNOPSIS

nfstest_io -d <datadir> [options]

DESCRIPTION

This I/O tool is used to create and manipulate files of different types. The arguments allow running for a specified period of time as well as running multiple processes. Each process modifies a single file at a time and the file name space is different for each process so there are no collisions between two different processes modifying the same file.

OPTIONS

--version

show program's version number and exit

-h, --help

show this help message and exit

-d DATADIR, --datadir=DATADIR

Top level directory where files will be created, it will be created if it does not exist

-s SEED, --seed=SEED

Seed to initialized the random number generator [default: automatically generated]

-n NPROCS, --nprocs=NPROCS

Number of processes to use [default: 1]

-r RUNTIME, --runtime=RUNTIME

Run time [default: '0']

-v VERBOSE, --verbose=VERBOSE

Verbose level: none|info|debug|dbg1-7|all [default: 'none']

-e, --exiterr

Exit on first error

Read and write:

--read=READ

Read file percentage [default: 40]

--write=WRITE

Write file percentage [default: 40]

--rdwr=RDWR

Read/write file percentage [default: 20]

--randio=RANDIO

Random file access percentage [default: 50]

--iodelay=IODELAY

Seconds to delay I/O operations [default: 0.0]

--direct

Use direct I/O

--rdwronly

Use read and write only, no rename, remove, etc.

File operations:

--create=CREATE

Create file percentage [default: 5]

--odgrade=ODGRADE

Open downgrade percentage [default: 10]

--osync=OSYNC

Open file with O_SYNC [default: 20]

--fsync=FSYNC

Percentage of fsync after write [default: 5]

--rename=RENAME

Rename file percentage [default: 5]

--remove=REMOVE

Remove file percentage [default: 5]

--trunc=TRUNC

Truncate file percentage [default: 5]

--ftrunc=FTRUNC

Truncate opened file percentage [default: 5]

--link=LINK

Create hard link percentage [default: 2]

--slink=SLINK

Create symbolic link percentage [default: 1]

--readdir=READDIR

List contents of directory percentage [default: 1]

--lock=LOCK

Lock file percentage [default: 20]

--unlock=UNLOCK

Unlock file percentage [default: 80]

--tlock=TLOCK

Lock test percentage [default: 50]

--lockfull=LOCKFULL

Lock full file percentage [default: 50]

--minfiles=MINFILES

Mininum number of files to create before any file operation is executed [default: 10]

File size options:

--fsizeavg=FSIZEAVG

File size average [default: 1m]

--fsizedev=FSIZEDEV

File size standard deviation [default: 256k]

--rsize=RSIZE

Read block size [default: 64k]

--rsizedev=RSIZEDEV

Read block size standard deviation [default: 8k]

--wsize=WSIZE

Write block size [default: 64k]

--wsizedev=WSIZEDEV

Write block size standard deviation [default: 8k]

--sizemult=SIZEMULT

Size multiplier [default: 1]

Logging options:

--createlog

Create log file

--createlogs

Create a log file for each process

--logdir=LOGDIR

Log directory [default: '/tmp']

BUGS

No known bugs.

AUTHOR

Jorge Mora (mora [at] netapp.com)