diskutil: don't print terse disk util twice for json,terse output format

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 482d69651c0362c3afd5863512dc32f7d73f3733..6d80360574e0c89899756cbc6a1d9838293c9c81 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -305,6 +305,16 @@ name=str   ASCII name of the job. This may be used to override the
                special purpose of also signaling the start of a new
                job.
 
+wait_for=str   Specifies the name of the already defined job to wait
+               for. Single waitee name only may be specified. If set, the job
+               won't be started until all workers of the waitee job are done.
+
+               Wait_for operates on the job name basis, so there are a few
+               limitations. First, the waitee must be defined prior to the
+               waiter job (meaning no forward references). Second, if a job
+               is being referenced as a waitee, it must have a unique name
+               (no duplicate waitees).
+
 description=str        Text description of the job. Doesn't do anything except
                dump this text description when this job is run. It's
                not parsed.
@@ -1003,7 +1013,9 @@ random_generator=str      Fio supports the following engines for generating
                typically good enough. LFSR only works with single
                block sizes, not with workloads that use multiple block
                sizes. If used with such a workload, fio may read or write
-               some blocks multiple times.
+               some blocks multiple times. The default value is tausworthe,
+               unless the required space exceeds 2^32 blocks. If it does,
+               then tausworthe64 is selected automatically.
 
 nice=int       Run the job with the given nice value. See man nice(2).
 
@@ -1558,8 +1570,12 @@ log_avg_msec=int By default, fio will log an entry in the iops, latency,
                disk log, that can quickly grow to a very large size. Setting
                this option makes fio average the each log entry over the
                specified period of time, reducing the resolution of the log.
-               Defaults to 0.
+               See log_max as well. Defaults to 0, logging all entries.
 
+log_max=bool   If log_avg_msec is set, fio logs the average over that window.
+               If you instead want to log the maximum value, set this option
+               to 1. Defaults to 0, meaning that averaged values are logged.
+.
 log_offset=int If this is set, the iolog options will include the byte
                offset for the IO entry as well as the other data values.