From a6e066505b6982871bce1a3921ab471c925952ae Mon Sep 17 00:00:00 2001
From: alexpeshkoff <alexpeshkoff@users.sourceforge.net>
Date: Fri, 6 Mar 2009 17:56:05 +0000
Subject: [PATCH] Fixed CORE-2316: Throttling Nbackup on large databases

---
 configure.in              |  3 ++-
 src/utilities/nbackup.cpp | 10 ++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/configure.in b/configure.in
index 02a9a255c8..639874ad86 100644
--- a/configure.in
+++ b/configure.in
@@ -661,7 +661,7 @@ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
 AC_CHECK_FUNCS(sem_timedwait)
 AC_CHECK_FUNCS(sem_init)
 if test "$ac_cv_func_sem_init" = "yes"; then
-AC_MSG_CHECKING(for working sem_int())
+AC_MSG_CHECKING(for working sem_init())
 AC_TRY_RUN([#include <semaphore.h>
 	main () {
 		sem_t s;
@@ -675,6 +675,7 @@ fi
 CFLAGS="$savedFlags"
 fi
 AC_CHECK_FUNCS(semtimedop)
+AC_CHECK_FUNCS(posix_fadvise)
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_BIGENDIAN
diff --git a/src/utilities/nbackup.cpp b/src/utilities/nbackup.cpp
index 436136ddac..5dc1cec7a8 100644
--- a/src/utilities/nbackup.cpp
+++ b/src/utilities/nbackup.cpp
@@ -366,10 +366,16 @@ void NBackup::open_database_scan()
 	if (dbase == INVALID_HANDLE_VALUE)
 		b_error::raise(uSvc, "Error (%d) opening database file: %s", GetLastError(), dbname.c_str());
 #else
-	dbase = open(dbname.c_str(), O_RDONLY | O_LARGEFILE);
+	dbase = open(dbname.c_str(), O_RDONLY | O_LARGEFILE | O_NOATIME | O_DIRECT);
 	if (dbase < 0)
 		b_error::raise(uSvc, "Error (%d) opening database file: %s", errno, dbname.c_str());
-#endif
+#ifdef HAVE_POSIX_FADVISE
+	if (posix_fadvise(dbase, 0, 0, POSIX_FADV_SEQUENTIAL) < 0)
+		b_error::raise(uSvc, "Error (%d) in posix_fadvise(SEQUENTIAL) for %s", errno, dbname.c_str());
+	if (posix_fadvise(dbase, 0, 0, POSIX_FADV_NOREUSE) < 0)
+		b_error::raise(uSvc, "Error (%d) in posix_fadvise(NOREUSE) for %s", errno, dbname.c_str());
+#endif //HAVE_POSIX_FADVISE
+#endif //WIN_NT
 }
 
 void NBackup::create_database()