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CentOS 7.0 - man page for nfstest_dio (centos section 1)

NFSTEST_DIO(1)					  nfstest_dio 1.0.1				       NFSTEST_DIO(1)

NAME
nfstest_dio - Direct I/O tests
SYNOPSIS
nfstest_dio --server <server> [options]
DESCRIPTION
Functional direct I/O tests verify that every READ/WRITE is sent to the server instead of the client caching the requests. Client bypasses read ahead by sending the READ with only the requested bytes. Verify the client correctly handles eof marker when reading the whole file. Verify client ignores delegation while writing a file. Direct I/O on pNFS tests verify the client sends the READ/WRITE to the correct DS or the MDS if using a PAGE- SIZE aligned buffer or not, respectively. Direct I/O data correctness tests verify that a file written with buffered I/O is read correctly with direct I/O. Verify that a file written with direct I/O is read correctly with buffered I/O. Vectored I/O tests verify coalescence of multiple vectors into one READ/WRITE packet when all vectors are PAGESIZE aligned. Vectors with different alignments are sent on separate packets. Valid for NFSv4.0 and NFSv4.1 including pNFS.
OPTIONS
--version show program's version number and exit -h, --help show this help message and exit -f FILE, --file=FILE Options file -s SERVER, --server=SERVER Server name or IP address -p PORT, --port=PORT NFS server port [default: 2049] --nfsversion=NFSVERSION NFS version [default: 4] --minorversion=MINORVERSION Minor version [default: 1] -e EXPORT, --export=EXPORT Exported file system to mount [default: '/'] -m MTPOINT, --mtpoint=MTPOINT Mount point [default: '/mnt/t'] --datadir=DATADIR Data directory where files are created [default: ''] -o MTOPTS, --mtopts=MTOPTS Mount options [default: 'hard,intr'] -i INTERFACE, --interface=INTERFACE Device interface [default: 'eth0'] -v VERBOSE, --verbose=VERBOSE Verbose level [default: 'none'] --nocleanup Do not cleanup --rmtraces Remove trace files [default: remove trace files if no errors] --keeptraces Do not remove any trace files [default: remove trace files if no errors] --createlog Create log file --bugmsgs=BUGMSGS File containing test messages to mark as bugs if they failed --ignore Ignore all bugs given by bugmsgs --nomount Do not mount server --basename=BASENAME Base name for all files and logs [default: automatically generated] --tverbose=TVERBOSE Verbose level for test messages [default: '1'] --filesize=FILESIZE File size to use for test files [default: 262144] --nfiles=NFILES Number of files to create [default: 2] --rsize=RSIZE Read size to use when reading files [default: 4096] --wsize=WSIZE Write size to use when writing files [default: 4096] --iodelay=IODELAY Seconds to delay I/O operations [default: 0.1] --offset-delta=OFFSET_DELTA Read/Write offset delta [default: 4096] --warnings Display warnings --nfsdebug=NFSDEBUG Set NFS kernel debug flags and save log messages [default: ''] --rpcdebug=RPCDEBUG Set RPC kernel debug flags and save log messages [default: ''] --sudo=SUDO Full path of binary for sudo [default: '/usr/bin/sudo'] --tcpdump=TCPDUMP Full path of binary for tcpdump [default: '/usr/sbin/tcpdump'] --iptables=IPTABLES Full path of binary for iptables [default: '/sbin/iptables'] --messages=MESSAGES Full path of log messages file [default: '/var/log/messages'] --tmpdir=TMPDIR Temporary directory [default: '/tmp'] --runtest=RUNTEST Comma separated list of tests to run [default: 'all'] --iotype=IOTYPE List of I/O types to test [default: 'read,write'] --biotype=BIOTYPE List of buffered I/O types to test [default: 'none,read,write'] --withdeleg=WITHDELEG Use delegation on tests [default: both without and with delegation]
TESTS
eof Verify eof marker is handled correctly when reading the end of the file. correctness Verify data correctness when reading/writing using direct I/O. File created with buffered I/O is read cor- rectly with direct I/O. File created with direct I/O is read correctly with buffered I/O. fstat Verify fstat() gets correct file size after writing. read Verify READ is sent after writing when the file is open for both read and write. read_ahead Verify READ is sent with only the requested bytes bypassing read ahead. basic Verify a packet is sent for each I/O request. rsize Verify multiple READ packets are sent for each read request having request size > rsize. wsize Verify multiple WRITE packets are sent for each write request having request size > wsize aligned Verify packet is sent to correct DS server when using a memory which is PAGESIZE aligned. nonaligned Verify packet is sent to the MDS when using a memory which is not PAGESIZE aligned. diffalign Verify packets are sent to both the MDS and correct DS on same open using buffers with different alignments. stripesize Verify multiple packets are sent for each request having the request size greater than stripe size. vectored_io Verify vectored I/O functionality.
EXAMPLES
The only required option is --server $ nfstest_dio --server 192.168.0.11
NOTES
The user id in the local host must have access to run commands as root using the 'sudo' command without the need for a password.
SEE ALSO
nfstest.test_util(1), nfstest_cache(1), nfstest_delegation(1), nfstest_pnfs(1), nfstest_posix(1)
BUGS
No known bugs.
AUTHOR
Jorge Mora (mora@netapp.com) NFStest 1.0.2 10 April 2013 NFSTEST_DIO(1)
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