If writing, setup the file first and do overwrites. Default: false.
.TP
.BI end_fsync \fR=\fPbool
-Sync file contents when job exits. Default: false.
+Sync file contents when a write stage has completed. Default: false.
.TP
.BI fsync_on_close \fR=\fPbool
If true, sync file contents on close. This differs from \fBend_fsync\fR in that