User guide

exer
n Write without lock from buffer1
N Write without lock from buffer2
c Compare buffer1 with buffer2
- Seek to file offset prior to last read or write
? First, seek to a random block offset within the specified range of blocks.
Next, call the program random to create each of a set of numbers once.
Then, choose a set that is a power of two and is greater than or equal to
the block range.
Each call to random results in a number that is then mapped to the set of
numbers in the block range. The exer command seeks to that location in
the file stream.
Since the exer command starts with the same random number seed, the
set of random numbers generated is always over the same set of block
range numbers.
s Sleep for the number of milliseconds specified by the delay option. If the
delay option is not present, sleep for 1 millisecond.
Note
Times reported in verbose mode are not necessarily accurate
when this action character is used.
-sec seconds
Terminates the exercise after the specified number of seconds have elapsed. By
default, the exerciser continues until the specified number of blocks or passcount
are processed.
-m
Specifies metrics mode and reports throughput at the end of the exercise.
-v
Specifies verbose mode and data read is written to STDOUT. This is not
applicable on write or compare operations.
-delay millisecs
Specifies the number of milliseconds to delay when ‘‘s’’ appears in the action
string.
13–42 Console Commands