1NFSTEST_IO(1)                   nfstest_io 1.2                   NFSTEST_IO(1)
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NAME

6       nfstest_io - I/O tool
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SYNOPSIS

9       nfstest_io -d <datadir> [options]
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DESCRIPTION

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

22       --version
23              show program's version number and exit
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25       -h, --help
26              show this help message and exit
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28       -d DATADIR, --datadir=DATADIR
29              Top level directory where files will be created, it will be cre‐
30              ated if it does not exist
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32       -s SEED, --seed=SEED
33              Seed  to initialized the random number generator [default: auto‐
34              matically generated]
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36       -n NPROCS, --nprocs=NPROCS
37              Number of processes to use [default: 1]
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39       -r RUNTIME, --runtime=RUNTIME
40              Run time [default: '0']
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42       -v VERBOSE, --verbose=VERBOSE
43              Verbose level: none|info|debug|dbg1-7|all [default: 'none']
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45       -e, --exiterr
46              Exit on first error
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48
49   Read and write:
50       --read=READ
51              Read file percentage [default: 40.0]
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53       --write=WRITE
54              Write file percentage [default: 40.0]
55
56       --rdwr=RDWR
57              Read/write file percentage [default: 20.0]
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59       --randio=RANDIO
60              Random file access percentage [default: 50.0]
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62       --iodelay=IODELAY
63              Seconds to delay I/O operations [default: 0.0]
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65       --direct
66              Use direct I/O
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68       --rdwronly
69              Use read and write only, no rename, remove, etc.
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71
72   File operations:
73       --create=CREATE
74              Create file percentage [default: 5.0]
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76       --odgrade=ODGRADE
77              Open downgrade percentage [default: 5.0]
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79       --osync=OSYNC
80              Open file with O_SYNC [default: 10.0]
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82       --fsync=FSYNC
83              Percentage of fsync after write [default: 2.0]
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85       --rename=RENAME
86              Rename file percentage [default: 5.0]
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88       --remove=REMOVE
89              Remove file percentage [default: 5.0]
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91       --trunc=TRUNC
92              Truncate file percentage [default: 2.0]
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94       --ftrunc=FTRUNC
95              Truncate opened file percentage [default: 2.0]
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97       --link=LINK
98              Create hard link percentage [default: 1.0]
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100       --slink=SLINK
101              Create symbolic link percentage [default: 0.2]
102
103       --readdir=READDIR
104              List contents of directory percentage [default: 0.5]
105
106       --lock=LOCK
107              Lock file percentage [default: 20.0]
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109       --unlock=UNLOCK
110              Unlock file percentage [default: 80.0]
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112       --tlock=TLOCK
113              Lock test percentage [default: 20.0]
114
115       --lockfull=LOCKFULL
116              Lock full file percentage [default: 50.0]
117
118       --minfiles=MINFILES
119              Minimum number of files to create before any file  operation  is
120              executed [default: 10]
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122
123   File size options:
124       --fsizeavg=FSIZEAVG
125              File size average [default: 1m]
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127       --fsizedev=FSIZEDEV
128              File size standard deviation [default: 256k]
129
130       --rsize=RSIZE
131              Read block size [default: 64k]
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133       --rsizedev=RSIZEDEV
134              Read block size standard deviation [default: 8k]
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136       --wsize=WSIZE
137              Write block size [default: 64k]
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139       --wsizedev=WSIZEDEV
140              Write block size standard deviation [default: 8k]
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142       --sizemult=SIZEMULT
143              Size multiplier [default: 1.0]
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145
146   Logging options:
147       --createlog
148              Create log file
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150       --createlogs
151              Create a log file for each process
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153       --logdir=LOGDIR
154              Log directory [default: '/tmp']
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SEE ALSO

157       nfstest.file_io(3), nfstest_alloc(1), nfstest_cache(1), nfstest_delega‐
158       tion(1),    nfstest_dio(1),    nfstest_file(1),     nfstest_interop(1),
159       nfstest_lock(1),   nfstest_pkt(1),  nfstest_pnfs(1),  nfstest_posix(1),
160       nfstest_sparse(1), nfstest_ssc(1), nfstest_xid(1)
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162

BUGS

164       No known bugs.
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AUTHOR

167       Jorge Mora (mora@netapp.com)
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171NFStest 2.1.5                  14 February 2017                  NFSTEST_IO(1)
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