filesetup: change random file init to be bool based

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index f151350ce39b221246316848c4648b80b7a9b1c0..419fa7373daef7a01f9807c03a70c27c0fbb1a5d 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1453,8 +1453,8 @@ Buffers and memory
        mix of random data and a fixed pattern. The fixed pattern is either zeros,
        or the pattern specified by :option:`buffer_pattern`. If the pattern option
        is used, it might skew the compression ratio slightly. Note that this is per
        mix of random data and a fixed pattern. The fixed pattern is either zeros,
        or the pattern specified by :option:`buffer_pattern`. If the pattern option
        is used, it might skew the compression ratio slightly. Note that this is per

-       block size unit, for file/disk wide compression level that matches this
-       setting, you'll also want to set :option:`refill_buffers`.
+       block size unit, see :option:`buffer_compress_chunk` for setting a finer
+       granularity of compression regions.

 
 .. option:: buffer_compress_chunk=int
 
 
 .. option:: buffer_compress_chunk=int
 


@@ -1463,7 +1463,8 @@ Buffers and memory
        will provide :option:`buffer_compress_percentage` of blocksize random data,
        followed by the remaining zeroed. With this set to some chunk size smaller
        than the block size, fio can alternate random and zeroed data throughout the
        will provide :option:`buffer_compress_percentage` of blocksize random data,
        followed by the remaining zeroed. With this set to some chunk size smaller
        than the block size, fio can alternate random and zeroed data throughout the

-       I/O buffer.
+       I/O buffer. This is particularly useful when bigger block sizes are used
+       for a job. Defaults to 512.

 
 .. option:: buffer_pattern=str
 
 
 .. option:: buffer_pattern=str