nfstest_io man page

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']

See Also

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

Bugs

No known bugs.

Author

Jorge Mora (mora@netapp.com)

Referenced By

nfstest(1), nfstest_alloc(1), nfstest_cache(1), nfstest_delegation(1), nfstest_dio(1), nfstest_file(1), nfstest_interop(1), nfstest_lock(1), nfstest_pkt(1), nfstest_pnfs(1), nfstest_posix(1), nfstest_sparse(1), nfstest_xid(1).

23 November 2015 NFStest 2.1.1 nfstest_io 1.0.1