opendir=str Tell fio to recursively add any file it can find in this
directory and down the file system tree.
+lockfile=bool If set, fio will lock a file internally before doing IO to it.
+ This makes it safe to share file descriptors across fio
+ jobs that run at the same time.
+
+lockfile_batch=int Acquiring a semaphore can be quite expensive, so
+ allow a process to complete this number of IOs before releasing
+ the semaphore again. Defaults to 1.
+
readwrite=str
rw=str Type of io pattern. Accepted values are:
psync Basic pread(2) or pwrite(2) io.
+ vsync Basic readv(2) or writev(2) IO.
+
libaio Linux native asynchronous io.
posixaio glibc posix asynchronous io.
cycles according to the cpuload= and
cpucycle= options. Setting cpuload=85
will cause that job to do nothing but burn
- 85% of the CPU.
+ 85% of the CPU. In case of SMP machines,
+ use numjobs=<no_of_cpu> to get desired CPU
+ usage, as the cpuload only loads a single
+ CPU at the desired rate.
guasi The GUASI IO engine is the Generic Userspace
Asyncronous Syscall Interface approach