Document that write_iolog is unsafe for concurrent jobs

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index eaa1c408843443bc0cfa9d45502d453c054c701c..1f1116c9ce59c0e49a52411b08dfb99214bdd7a7 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -743,7 +743,9 @@ Skip the specified number of bytes when \fBzonesize\fR bytes of data have been
 read.
 .TP
 .BI write_iolog \fR=\fPstr
-Write the issued I/O patterns to the specified file.
+Write the issued I/O patterns to the specified file.  Specify a separate file
+for each job, otherwise the iologs will be interspersed and the file may be
+corrupt.
 .TP
 .BI read_iolog \fR=\fPstr
 Replay the I/O patterns contained in the specified file generated by