asked to limit reads or writes to a certain rate. If that is the case, then
the distribution may be skewed. Default: 50.
.TP
+.BI random_distribution \fR=\fPstr:float
+By default, fio will use a completely uniform random distribution when asked
+to perform random IO. Sometimes it is useful to skew the distribution in
+specific ways, ensuring that some parts of the data is more hot than others.
+Fio includes the following distribution models:
+.RS
+.TP
+.B random
+Uniform random distribution
+.TP
+.B zipf
+Zipf distribution
+.TP
+.B pareto
+Pareto distribution
+.TP
+.RE
+.P
+When using a zipf or pareto distribution, an input value is also needed to
+define the access pattern. For zipf, this is the zipf theta. For pareto,
+it's the pareto power. Fio includes a test program, genzipf, that can be
+used visualize what the given input values will yield in terms of hit rates.
+If you wanted to use zipf with a theta of 1.2, you would use
+random_distribution=zipf:1.2 as the option. If a non-uniform model is used,
+fio will disable use of the random map.
+.TP
.B norandommap
Normally \fBfio\fR will cover every block of the file when doing random I/O. If
this parameter is given, a new offset will be chosen without looking at past
Average bandwidth for \fBrate\fR and \fBratemin\fR over this number of
milliseconds. Default: 1000ms.
.TP
+.BI max_latency \fR=\fPint
+If set, fio will exit the job if it exceeds this maximum latency. It will exit
+with an ETIME error.
+.TP
.BI cpumask \fR=\fPint
Set CPU affinity for this job. \fIint\fR is a bitmask of allowed CPUs the job
may run on. See \fBsched_setaffinity\fR\|(2).
.BI cpus_allowed \fR=\fPstr
Same as \fBcpumask\fR, but allows a comma-delimited list of CPU numbers.
.TP
+.BI numa_cpu_nodes \fR=\fPstr
+Set this job running on spcified NUMA nodes' CPUs. The arguments allow
+comma delimited list of cpu numbers, A-B ranges, or 'all'.
+.TP
+.BI numa_mem_policy \fR=\fPstr
+Set this job's memory policy and corresponding NUMA nodes. Format of
+the argements:
+.RS
+.TP
+.B <mode>[:<nodelist>]
+.TP
+.B mode
+is one of the following memory policy:
+.TP
+.B default, prefer, bind, interleave, local
+.TP
+.RE
+For \fBdefault\fR and \fBlocal\fR memory policy, no \fBnodelist\fR is
+needed to be specified. For \fBprefer\fR, only one node is
+allowed. For \fBbind\fR and \fBinterleave\fR, \fBnodelist\fR allows
+comma delimited list of numbers, A-B ranges, or 'all'.
+.TP
.BI startdelay \fR=\fPint
Delay start of job for the specified number of seconds.
.TP
these time calls will be excluded from other uses. Fio will manually clear it
from the CPU mask of other jobs.
.TP
+.BI ignore_error \fR=\fPstr
+Sometimes you want to ignore some errors during test in that case you can specify
+error list for each error type.
+.br
+ignore_error=READ_ERR_LIST,WRITE_ERR_LIST,VERIFY_ERR_LIST
+.br
+errors for given error type is separated with ':'.
+Error may be symbol ('ENOSPC', 'ENOMEM') or an integer.
+.br
+Example: ignore_error=EAGAIN,ENOSPC:122 .
+.br
+This option will ignore EAGAIN from READ, and ENOSPC and 122(EDQUOT) from WRITE.
+.TP
+.BI error_dump \fR=\fPbool
+If set dump every error even if it is non fatal, true by default. If disabled
+only fatal error will be dumped
+.TP
.BI cgroup \fR=\fPstr
Add job to this control group. If it doesn't exist, it will be created.
The system must have a mounted cgroup blkio mount point for this to work. If
Transmission control protocol
.TP
.B udp
-Unreliable datagram protocol
+User datagram protocol
.TP
.B unix
UNIX domain socket
projects / fio.git / blobdiff