srv0srv.h One can now specify innodb_unix_file_flush_method in my.cnf

srv0srv.c	One can now specify innodb_unix_file_flush_method in my.cnf
srv0start.c	One can now specify innodb_unix_file_flush_method in my.cnf
ha_innobase.cc	One can now specify innodb_unix_file_flush_method in my.cnf
ha_innobase.h	One can now specify innodb_unix_file_flush_method in my.cnf
mysqld.cc	One can now specify innodb_unix_file_flush_method in my.cnf


sql/ha_innobase.cc:
  One can now specify innodb_unix_file_flush_method in my.cnf
sql/ha_innobase.h:
  One can now specify innodb_unix_file_flush_method in my.cnf
sql/mysqld.cc:
  One can now specify innodb_unix_file_flush_method in my.cnf
innobase/srv/srv0srv.c:
  One can now specify innodb_unix_file_flush_method in my.cnf
innobase/srv/srv0start.c:
  One can now specify innodb_unix_file_flush_method in my.cnf
innobase/include/srv0srv.h:
  One can now specify innodb_unix_file_flush_method in my.cnf
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

3 files changed, 31 insertions, 0 deletions

diff --git a/innobase/include/srv0srv.h b/innobase/include/srv0srv.h
index 8853745926d..26164e2ccdc 100644
--- a/innobase/include/srv0srv.h
+++ b/innobase/include/srv0srv.h
@@ -48,6 +48,9 @@ extern dulint	srv_archive_recovery_limit_lsn;
 
 extern ulint	srv_lock_wait_timeout;
 
+extern char*    srv_unix_file_flush_method_str;
+extern ulint    srv_unix_file_flush_method;
+
 extern ibool    srv_set_thread_priorities;
 extern int      srv_query_thread_priority;
 
@@ -100,6 +103,13 @@ typedef struct srv_sys_struct	srv_sys_t;
 /* The server system */
 extern srv_sys_t*	srv_sys;
 
+/* Alternatives for fiel flush option in Unix; see the InnoDB manual about
+what these mean */
+#define SRV_UNIX_FDATASYNC   1
+#define SRV_UNIX_O_DSYNC     2
+#define SRV_UNIX_LITTLESYNC  3
+#define SRV_UNIX_NOSYNC      4
+
 /*************************************************************************
 Boots Innobase server. */
 
diff --git a/innobase/srv/srv0srv.c b/innobase/srv/srv0srv.c
index df36ec446a3..186ed1b8d56 100644
--- a/innobase/srv/srv0srv.c
+++ b/innobase/srv/srv0srv.c
@@ -88,6 +88,9 @@ dulint	srv_archive_recovery_limit_lsn;
 
 ulint	srv_lock_wait_timeout	= 1024 * 1024 * 1024;
 
+char*   srv_unix_file_flush_method_str = NULL;
+ulint   srv_unix_file_flush_method = 0;
+
 ibool   srv_set_thread_priorities = TRUE;
 int     srv_query_thread_priority = 0;
 /*-------------------------------------------*/
diff --git a/innobase/srv/srv0start.c b/innobase/srv/srv0start.c
index 9e10cca7200..105d6e11623 100644
--- a/innobase/srv/srv0start.c
+++ b/innobase/srv/srv0start.c
@@ -532,6 +532,24 @@ innobase_start_or_create_for_mysql(void)
 
 	srv_is_being_started = TRUE;
 
+	if (0 == ut_strcmp(srv_unix_file_flush_method_str, "fdatasync")) {
+	  srv_unix_file_flush_method = SRV_UNIX_FDATASYNC;
+	} else if (0 == ut_strcmp(srv_unix_file_flush_method_str, "O_DSYNC")) {
+	  srv_unix_file_flush_method = SRV_UNIX_O_DSYNC;
+	} else if (0 == ut_strcmp(srv_unix_file_flush_method_str,
+				  "littlesync")) {
+	  srv_unix_file_flush_method = SRV_UNIX_LITTLESYNC;
+	} else if (0 == ut_strcmp(srv_unix_file_flush_method_str, "nosync")) {
+	  srv_unix_file_flush_method = SRV_UNIX_NOSYNC;
+	} else {
+	  fprintf(stderr, 
+          "InnoDB: Unrecognized value for innodb_unix_file_flush_method\n");
+
+	  return(DB_ERROR);
+	}
+
+	printf("InnoDB file flush method %lu\n", srv_unix_file_flush_method);
+
 	os_aio_use_native_aio = srv_use_native_aio;
 
 	err = srv_boot();