01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.test.performance;
22:
23: import java.io.*;
24:
25: public class FileSyncBenchmark {
26:
27: private static String FILE = "FileSyncBenchmark.file";
28:
29: private static final int COUNT = 1000;
30:
31: private static final int SIZE = 1000;
32:
33: public static void main(String[] args) throws IOException {
34: new File(FILE).delete();
35: RandomAccessFile raf = new RandomAccessFile(FILE, "rw");
36: for (int i = 0; i < SIZE; i++) {
37: raf.write(1);
38: }
39: raf.close();
40: raf = new RandomAccessFile(FILE, "rw");
41: long start = System.currentTimeMillis();
42: for (int i = 0; i < COUNT; i++) {
43: raf.write(1);
44: raf.getFD().sync();
45: }
46: long stop = System.currentTimeMillis();
47: long duration = stop - start;
48: raf.close();
49: new File(FILE).delete();
50: System.out.println("Time for " + COUNT + " syncs of a " + SIZE
51: + " bytes sized file:\n" + duration + "ms");
52: }
53: }
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