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+<!-- keywords: SQLITE_SYNC_DATAONLY SQLITE_SYNC_FULL SQLITE_SYNC_NORMAL -->
+<div class=nosearch>
+<a href="intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Synchronization Type Flags</h2>
+</div>
+<blockquote><pre>
+#define SQLITE_SYNC_NORMAL        0x00002
+#define SQLITE_SYNC_FULL          0x00003
+#define SQLITE_SYNC_DATAONLY      0x00010
+</pre></blockquote>
+<p>
+When SQLite invokes the xSync() method of an
+<a href="../c3ref/io_methods.html">sqlite3_io_methods</a> object it uses a combination of
+these integer values as the second argument.</p>
+
+<p>When the SQLITE_SYNC_DATAONLY flag is used, it means that the
+sync operation only needs to flush data to mass storage.  Inode
+information need not be flushed. If the lower four bits of the flag
+equal SQLITE_SYNC_NORMAL, that means to use normal fsync() semantics.
+If the lower four bits equal SQLITE_SYNC_FULL, that means
+to use Mac OS X style fullsync instead of fsync().</p>
+
+<p>Do not confuse the SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL flags
+with the <a href="../pragma.html#pragma_synchronous">PRAGMA synchronous</a>=NORMAL and <a href="../pragma.html#pragma_synchronous">PRAGMA synchronous</a>=FULL
+settings.  The <a href="../pragma.html#pragma_synchronous">synchronous pragma</a> determines when calls to the
+xSync VFS method occur and applies uniformly across all platforms.
+The SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL flags determine how
+energetic or rigorous or forceful the sync operations are and
+only make a difference on Mac OSX for the default SQLite code.
+(Third-party VFS implementations might also make the distinction
+between SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL, but among the
+operating systems natively supported by SQLite, only Mac OSX
+cares about the difference.)
+</p><p>See also lists of
+  <a href="objlist.html">Objects</a>,
+  <a href="constlist.html">Constants</a>, and
+  <a href="funclist.html">Functions</a>.</p>
+