Add blockdev_size() support for OpenBSD

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index c1b768d2841d131073e271930c085f5a6a321e60..3f8acee15221f321a8838fa907759d3d96455e2e 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1066,6 +1066,10 @@ random_generator=str     Fio supports the following engines for generating
 
 nice=int       Run the job with the given nice value. See man nice(2).
 
 
 nice=int       Run the job with the given nice value. See man nice(2).
 

+     On Windows, values less than -15 set the process class to "High";
+     -1 through -15 set "Above Normal"; 1 through 15 "Below Normal";
+     and above 15 "Idle" priority class.
+

 prio=int       Set the io priority value of this job. Linux limits us to
                a positive value between 0 and 7, with 0 being the highest.
                See man ionice(1). Refer to an appropriate manpage for
 prio=int       Set the io priority value of this job. Linux limits us to
                a positive value between 0 and 7, with 0 being the highest.
                See man ionice(1). Refer to an appropriate manpage for


@@ -1554,10 +1558,10 @@ read_iolog=str  Open an iolog with the specified file name and replay the
 
 replay_no_stall=int When replaying I/O with read_iolog the default behavior
                is to attempt to respect the time stamps within the log and
 
 replay_no_stall=int When replaying I/O with read_iolog the default behavior
                is to attempt to respect the time stamps within the log and

-               replay them with the appropriate delay between IOPS.  By
+               replay them with the appropriate delay between IOPS. By

                setting this variable fio will not respect the timestamps and
                attempt to replay them as fast as possible while still
                setting this variable fio will not respect the timestamps and
                attempt to replay them as fast as possible while still

-               respecting ordering.  The result is the same I/O pattern to a
+               respecting ordering. The result is the same I/O pattern to a

                given device, but different timings.
 
 replay_redirect=str While replaying I/O patterns using read_iolog the
                given device, but different timings.
 
 replay_redirect=str While replaying I/O patterns using read_iolog the


@@ -1569,13 +1573,14 @@ replay_redirect=str While replaying I/O patterns using read_iolog the
                mapping.  Replay_redirect causes all IOPS to be replayed onto
                the single specified device regardless of the device it was
                recorded from. i.e. replay_redirect=/dev/sdc would cause all
                mapping.  Replay_redirect causes all IOPS to be replayed onto
                the single specified device regardless of the device it was
                recorded from. i.e. replay_redirect=/dev/sdc would cause all

-               IO in the blktrace to be replayed onto /dev/sdc.  This means
-               multiple devices will be replayed onto a single, if the trace
-               contains multiple devices.  If you want multiple devices to be
-               replayed concurrently to multiple redirected devices you must
-               blkparse your trace into separate traces and replay them with
-               independent fio invocations.  Unfortuantely this also breaks
-               the strict time ordering between multiple device accesses.
+               IO in the blktrace or iolog to be replayed onto /dev/sdc.
+               This means multiple devices will be replayed onto a single
+               device, if the trace contains multiple devices. If you want
+               multiple devices to be replayed concurrently to multiple
+               redirected devices you must blkparse your trace into separate
+               traces and replay them with independent fio invocations.
+               Unfortuantely this also breaks the strict time ordering
+               between multiple device accesses.

 
 replay_align=int       Force alignment of IO offsets and lengths in a trace
                to this power of 2 value.
 
 replay_align=int       Force alignment of IO offsets and lengths in a trace
                to this power of 2 value.


@@ -1681,6 +1686,10 @@ log_store_compressed=bool        If set, fio will store the log files in a
                the --inflate-log command line parameter. The files will be
                stored with a .fz suffix.
 
                the --inflate-log command line parameter. The files will be
                stored with a .fz suffix.
 

+log_unix_epoch=bool    If set, fio will log Unix timestamps to the log
+               files produced by enabling write_type_log for each log type, instead
+               of the default zero-based timestamps.
+

 block_error_percentiles=bool   If set, record errors in trim block-sized
                units from writes and trims and output a histogram of
                how many trims it took to get to errors, and what kind
 block_error_percentiles=bool   If set, record errors in trim block-sized
                units from writes and trims and output a histogram of
                how many trims it took to get to errors, and what kind