NFSTEST_IO

Section: nfstest_io 1.2 (1)
Updated: 19 July 2021
Index Return to Main Contents
 

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: 40.0]
--write=WRITE
Write file percentage [default: 40.0]
--rdwr=RDWR
Read/write file percentage [default: 20.0]
--randio=RANDIO
Random file access percentage [default: 50.0]
--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: 5.0]
--odgrade=ODGRADE
Open downgrade percentage [default: 5.0]
--osync=OSYNC
Open file with O_SYNC [default: 10.0]
--fsync=FSYNC
Percentage of fsync after write [default: 2.0]
--rename=RENAME
Rename file percentage [default: 5.0]
--remove=REMOVE
Remove file percentage [default: 5.0]
--trunc=TRUNC
Truncate file percentage [default: 2.0]
--ftrunc=FTRUNC
Truncate opened file percentage [default: 2.0]
--link=LINK
Create hard link percentage [default: 1.0]
--slink=SLINK
Create symbolic link percentage [default: 0.2]
--readdir=READDIR
List contents of directory percentage [default: 0.5]
--lock=LOCK
Lock file percentage [default: 20.0]
--unlock=UNLOCK
Unlock file percentage [default: 80.0]
--tlock=TLOCK
Lock test percentage [default: 20.0]
--lockfull=LOCKFULL
Lock full file percentage [default: 50.0]
--minfiles=MINFILES
Minimum 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: 1.0]

 

Logging options:

--createlog
Create log file
--createlogs
Create a log file for each process
--logdir=LOGDIR
Log directory [default: '/tmp']
 

SEE ALSO

nfstest.file_io(3), nfstest_alloc(1), nfstest_cache(1), nfstest_delegation(1), nfstest_dio(1), nfstest_fcmp(1), nfstest_file(1), nfstest_interop(1), nfstest_lock(1), nfstest_pkt(1), nfstest_pnfs(1), nfstest_posix(1), nfstest_rdma(1), nfstest_sparse(1), nfstest_ssc(1), nfstest_xid(1)

 

BUGS

No known bugs.  

AUTHOR

Jorge Mora (mora@netapp.com)


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
Read and write:
File operations:
File size options:
Logging options:
SEE ALSO
BUGS
AUTHOR

This document was created by man2html, using the manual pages.
Time: 16:08:34 GMT, July 19, 2021