1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// --------------------------------------------------------------------------
//
// File
// Name: BackupStoreContants.h
// Purpose: constants for the backup system
// Created: 2003/08/28
//
// --------------------------------------------------------------------------
#ifndef BACKUPSTORECONSTANTS__H
#define BACKUPSTORECONSTANTS__H
#define BACKUPSTORE_ROOT_DIRECTORY_ID 1
#define BACKUP_STORE_SERVER_VERSION 1
// Minimum size for a chunk to be compressed
#define BACKUP_FILE_MIN_COMPRESSED_CHUNK_SIZE 256
// min and max sizes for blocks
#define BACKUP_FILE_MIN_BLOCK_SIZE 4096
#define BACKUP_FILE_MAX_BLOCK_SIZE (512*1024)
// Increase the block size if there are more than this number of blocks
#define BACKUP_FILE_INCREASE_BLOCK_SIZE_AFTER 4096
// Avoid creating blocks smaller than this
#define BACKUP_FILE_AVOID_BLOCKS_LESS_THAN 128
// Maximum number of sizes to do an rsync-like scan for
#define BACKUP_FILE_DIFF_MAX_BLOCK_SIZES 64
// When doing rsync scans, do not scan for blocks smaller than
#define BACKUP_FILE_DIFF_MIN_BLOCK_SIZE 128
// A limit to stop diffing running out of control: If more than this
// times the number of blocks in the original index are found, stop
// looking. This stops really bad cases of diffing files containing
// all the same byte using huge amounts of memory and processor time.
// This is a multiple of the number of blocks in the diff from file.
#define BACKUP_FILE_DIFF_MAX_BLOCK_FIND_MULTIPLE 4096
#endif // BACKUPSTORECONSTANTS__H
|
