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-rw-r--r--innobase/os/os0file.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/innobase/os/os0file.c b/innobase/os/os0file.c
index aa45030d93b..f02b81b8fd8 100644
--- a/innobase/os/os0file.c
+++ b/innobase/os/os0file.c
@@ -1763,7 +1763,21 @@ os_file_flush(
#else
int ret;
-#ifdef HAVE_FDATASYNC
+#ifdef HAVE_DARWIN_THREADS
+ /* Apple has disabled fsync() for internal disk drives in OS X. That
+ caused corruption for a user when he tested a power outage. Let us in
+ OS X use a nonstandard flush method recommended by an Apple
+ engineer. */
+
+ ret = fcntl(file, F_FULLFSYNC, NULL);
+
+ if (ret) {
+ /* If we are not on a file system that supports this, then
+ fall back to a plain fsync. */
+
+ ret = fsync(file);
+ }
+#elif HAVE_FDATASYNC
ret = fdatasync(file);
#else
/* fprintf(stderr, "Flushing to file %p\n", file); */