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| author | Jens Axboe <axboe@fb.com> | 2016-01-30 22:03:39 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-01-30 22:03:39 -0700 |
| commit | 3bb85e8443d626ee71a4126dbe6ebcaf751527f1 (patch) | |
| tree | e2bbfd6202cf8714940bfed119757a218c743228 | |
| parent | a89c77abb152277ca3731f4766a7f377f0fc99df (diff) | |
| download | fio-3bb85e8443d626ee71a4126dbe6ebcaf751527f1.tar.gz | |
Add a note of what is the default value for random_generator
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | HOWTO | 4 | ||||
| -rw-r--r-- | fio.1 | 4 |
2 files changed, 6 insertions, 2 deletions
@@ -1013,7 +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). @@ -920,7 +920,9 @@ guarantees that we never generate the same offset twice, and it's also less computationally expensive. It's not a true random generator, however, though for IO purposes it's 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. +workload, fio may read or write 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. .TP .BI nice \fR=\fPint Run job with given nice value. See \fBnice\fR\|(2). |