nfstest_io - Man Page

I/O tool

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]