Break metadata into smaller chunks (number of chunks=10) for faster delta generation.

metadata_unittest.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 
 #include <string>
 #include <vector>
@@ skipping 95 matching lines @@
   //       - Chunk 0, 1, 2, 3
   //   - Root directory (inode 2)
   //   - Journal (inode 8)
   //   - lost+found directory (inode 11)
   //   - test_file indirect block (inode 12)
   struct {
     string metadata_name;
     off_t start_block; // Set to -1 to skip start block verification
     off_t num_blocks; // Set to -1 to skip num blocks verification
   } exp_results[] =
-      {{"<rootfs-bg-0-0-metadata>", 0, 260},
-       {"<rootfs-bg-0-1-metadata>", 260, 260},
-       {"<rootfs-bg-0-2-metadata>", 520, 260},
-       {"<rootfs-bg-0-3-metadata>", 780, 263},
-       {"<rootfs-bg-1-0-metadata>", 32768, 260},
-       {"<rootfs-bg-1-1-metadata>", 33028, 260},
-       {"<rootfs-bg-1-2-metadata>", 33288, 260},
-       {"<rootfs-bg-1-3-metadata>", 33548, 263},
+      {{"<rootfs-bg-0-0-metadata>", 0, 104},
+       {"<rootfs-bg-0-1-metadata>", 104, 104},
+       {"<rootfs-bg-0-2-metadata>", 208, 104},
+       {"<rootfs-bg-0-3-metadata>", 312, 104},
+       {"<rootfs-bg-0-4-metadata>", 416, 104},
+       {"<rootfs-bg-0-5-metadata>", 520, 104},
+       {"<rootfs-bg-0-6-metadata>", 624, 104},
+       {"<rootfs-bg-0-7-metadata>", 728, 104},
+       {"<rootfs-bg-0-8-metadata>", 832, 104},
+       {"<rootfs-bg-0-9-metadata>", 936, 107},
+       {"<rootfs-bg-1-0-metadata>", 32768, 104},
+       {"<rootfs-bg-1-1-metadata>", 32872, 104},
+       {"<rootfs-bg-1-2-metadata>", 32976, 104},
+       {"<rootfs-bg-1-3-metadata>", 33080, 104},
+       {"<rootfs-bg-1-4-metadata>", 33184, 104},
+       {"<rootfs-bg-1-5-metadata>", 33288, 104},
+       {"<rootfs-bg-1-6-metadata>", 33392, 104},
+       {"<rootfs-bg-1-7-metadata>", 33496, 104},
+       {"<rootfs-bg-1-8-metadata>", 33600, 104},
+       {"<rootfs-bg-1-9-metadata>", 33704, 107},
        {"<rootfs-inode-2-metadata>", -1, 1},
        {"<rootfs-inode-8-metadata>", -1, 4101},
        {"<rootfs-inode-11-metadata>", -1, 4},
        {"<rootfs-inode-12-metadata>", -1, 1}};
 
   int num_exp_results = sizeof(exp_results) / sizeof(exp_results[0]);
   EXPECT_EQ(graph.size(), num_exp_results);
 
   for (int i = 0; i < num_exp_results; i++) {
     Vertex& vertex = graph[i];
@@ skipping 14 matching lines @@
       EXPECT_EQ(op.src_extents(0).start_block(), exp_results[i].start_block);
     }
 
     if (exp_results[i].num_blocks != -1) {
       EXPECT_EQ(op.src_extents(0).num_blocks(), exp_results[i].num_blocks);
     }
   }
 }
 
 }  // namespace chromeos_update_engine