xxhash: dos2unix'ize

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index e69cf4130696c55bf0af6cc3f224d6136af5666b..bafad93fbdacc050d7c3b694556859af7b3cd9eb 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1068,6 +1068,13 @@ loops=int        Run the specified number of iterations of this job. Used
                to repeat the same workload a given number of times. Defaults
                to 1.
 
+verify_only    Do not perform specified workload---only verify data still
+               matches previous invocation of this workload. This option
+               allows one to check data multiple times at a later date
+               without overwriting it. This option makes sense only for
+               workloads that write data, and does not support workloads
+               with the time_based option set.
+
 do_verify=bool Run the verify phase after a write phase. Only makes sense if
                verify is set. Defaults to 1.
 
@@ -1098,6 +1105,10 @@ verify=str       If writing to a file, fio can verify the file contents
                        crc7    Use a crc7 sum of the data area and store
                                it in the header of each block.
 
+                       xxhash  Use xxhash as the checksum function. Generally
+                               the fastest software checksum that fio
+                               supports.
+
                        sha512  Use sha512 as the checksum function.
 
                        sha256  Use sha256 as the checksum function.
@@ -1106,7 +1117,9 @@ verify=str        If writing to a file, fio can verify the file contents
 
                        meta    Write extra information about each io
                                (timestamp, block number etc.). The block
-                               number is verified. See also verify_pattern.
+                               number is verified. The io sequence number is
+                               verified for workloads that write data.
+                               See also verify_pattern.
 
                        null    Only pretend to verify. Useful for testing
                                internals with ioengine=null, not for much