ioengines: implement dircreate, dirstat, dirdelete engines to fileoperations.c

[fio.git] / HOWTO.rst

diff --git a/HOWTO.rst b/HOWTO.rst
index 4c8ac3314e711d020223dfac201d59c4007e1f01..fb067fe52844cb4fb3c1ad3bf192807b8007e5dc 100644 (file)
--- a/HOWTO.rst
+++ b/HOWTO.rst
@@ -2192,6 +2192,21 @@ I/O engine
                        and 'nrfiles', so that the files will be created.
                        This engine is to measure file delete.
 
+               **dircreate**
+                       Simply create the directories and do no I/O to them.  You still need to
+                       set  `filesize` so that all the accounting still occurs, but no
+                       actual I/O will be done other than creating the directories.
+
+               **dirstat**
+                       Simply do stat() and do no I/O to the directories. You need to set 'filesize'
+                       and 'nrfiles', so that directories will be created.
+                       This engine is to measure directory lookup and meta data access.
+
+               **dirdelete**
+                       Simply delete the directories by rmdir() and do no I/O to them. You need to set 'filesize'
+                       and 'nrfiles', so that the directories will be created.
+                       This engine is to measure directory delete.
+
                **libpmem**
                        Read and write using mmap I/O to a file on a filesystem
                        mounted with DAX on a persistent memory device through the PMDK