This example shows HashBackup creating and maintaining a deduped & encrypted remote file system mounted locally as a regular filesystem via FUSE. This example is with rsync.net, though the same basic steps apply to any HashBackup destination. 1. Copy ssh public key to rsync.net server: [jim@mb]$ scp ~/.ssh/id_rsa.pub XXXX@usw-s002.rsync.net:.ssh/authorized_keys Password: id_rsa.pub 100% 392 0.4KB/s 00:00 2. Create a local HashBackup backup directory: [jim@mb]$ hb init -c hb HashBackup build 1070 Copyright 2009-2013 HashBackup, LLC Backup directory: /Users/jim/hb Permissions set for owner access only Created key file /Users/jim/hb/key.conf Key file set to read-only Setting include/exclude defaults: /Users/jim/hb/inex.conf VERY IMPORTANT: your backup is encrypted and can only be accessed with the encryption key, stored in the file: /Users/jim/hb/key.conf You MUST make copies of this file and store them in a secure location, separate from your computer and backup data. If your hard drive fails, you will need this key to restore your files. If you setup any remote destinations in dest.conf, that file should be copied too. Backup directory initialized 3. Create a dest.conf file in the backup directory: [jim@mb]$ cat - >hb/dest.conf destname rsyncnet type rsync dir NNNN@usw-s002.rsync.net: password XYZZY 4. Enable dedup using up to 1GB of memory: [jim@mb]$ hb config -c hb dedup-mem 1g HashBackup build 1070 Copyright 2009-2013 HashBackup, LLC Backup directory: /Users/jim/hb Current config version: 0 Showing current config Set dedup-mem to 1g (was 0) 5. Create a test file, 10 x 10k random blocks [jim@mb]$ dd if=/dev/urandom of=ran10k bs=10k count=1 1+0 records in 1+0 records out 10240 bytes transferred in 0.001602 secs (6392272 bytes/sec) [jim@mb]$ cat ran10k ran10k ran10k ran10k ran10k ran10k ran10k ran10k ran10k ran10k >test100k [jim@mb]$ ls -l test100k -rw-r--r-- 1 jim staff 102400 Oct 15 14:20 test100k 6. Backup the test file: [jim@mb]$ hb backup -c hb test100k HashBackup build 1070 Copyright 2009-2013 HashBackup, LLC Backup directory: /Users/jim/hb Using destinations in dest.conf This is backup version: 0 Dedup enabled, 0% of current, 0% of max /Users/jim/test100k Writing archive 0.0 Copied arc.0.0 to rsyncnet (11 KB 2s 5.0 KB/s) Copied hb.db.0 to rsyncnet (4.3 KB 2s 2.1 KB/s) Copied dest.db to rsyncnet (340 B 2s 162 B/s) Time: 4.8s Wait: 6.5s Checked: 5 paths, 125418 bytes, 125 KB Saved: 5 paths, 125418 bytes, 125 KB Excluded: 0 Dupbytes: 0 Compression: 87%, 8.1:1 Space: 15 KB, 15 KB total No errors 7. Create a different test file, with junk at the beginning, middle, and end: [jim@mb]$ echo abc>junk [jim@mb]$ cat junk test100k junk test100k junk >test200k [jim@mb]$ ls -l test200k -rw-r--r-- 1 jim staff 204812 Oct 15 14:24 test200k 8. Backup the new file: [jim@mb]$ hb backup -c hb test200k HashBackup build 1070 Copyright 2009-2013 HashBackup, LLC Backup directory: /Users/jim/hb Using destinations in dest.conf This is backup version: 1 Dedup enabled, 0% of current, 0% of max /Users/jim/test200k Writing archive 1.0 Copied arc.1.0 to rsyncnet (42 KB 2s 15 KB/s) Copied hb.db.1 to rsyncnet (4.6 KB 1s 2.3 KB/s) Copied dest.db to rsyncnet (388 B 1s 207 B/s) Time: 3.0s Wait: 6.7s Checked: 5 paths, 227898 bytes, 227 KB Saved: 5 paths, 227898 bytes, 227 KB Excluded: 0 Dupbytes: 122880, 122 KB, 53% Compression: 79%, 4.8:1 Space: 47 KB, 62 KB total No errors 9. What do the stats look like? [jim@mb]$ hb stats -c hb HashBackup build 1070 Copyright 2009-2013 HashBackup, LLC Backup directory: /Users/jim/hb 2 completed backups 353 KB file bytes checked since initial backup 353 KB file bytes saved since initial backup 0s total backup time 176 KB average file bytes checked per backup in last 2 backups 176 KB average file bytes saved per backup in last 2 backups 100% average changed data percentage per backup in last 2 backups 0s average backup time for last 2 backups 353 KB file bytes currently stored 2 archives 53 KB archive space 53 KB active archive bytes - 100% 5:1 industry standard dedup ratio 26 KB average archive space per backup for last 2 backups 6:1 reduction ratio of backed up files for last 2 backups 6.2 MB dedup table current size 4 dedup table entries 0% dedup table utilization at current size 2 files 6 paths 12 blocks 6 unique blocks 16,386 average variable-block length (bytes) 10. How much space are we using on the rsync server? [jim@mb]$ ssh XXXX@usw-s002.rsync.net ls -l total 309 -rw-r--r-- 1 XXXX XXXX 33 Oct 15 18:22 DESTID -rw-r--r-- 1 XXXX XXXX 11216 Oct 15 18:22 arc.0.0 -rw-r--r-- 1 XXXX XXXX 42416 Oct 15 18:25 arc.1.0 -rw-r--r-- 1 XXXX XXXX 388 Oct 15 18:25 dest.db -rw-r--r-- 1 XXXX XXXX 4308 Oct 15 18:22 hb.db.0 -rw-r--r-- 1 XXXX XXXX 4604 Oct 15 18:25 hb.db.1 11. By default, HB creates a local backup too. Delete the local arc files (this is the file backup data) [jim@mb]$ hb config -c hb cache-size-limit 0 HashBackup build 1070 Copyright 2009-2013 HashBackup, LLC Backup directory: /Users/jim/hb Current config version: 2 Showing current config Set cache-size-limit to 0 (was -1) [jim@mb]$ hb backup -c hb /dev/null HashBackup build 1070 Copyright 2009-2013 HashBackup, LLC Backup directory: /Users/jim/hb Using destinations in dest.conf This is backup version: 2 Dedup enabled, 0% of current, 0% of max /dev/null Removing archive 2.0 Copied hb.db.2 to rsyncnet (4.0 KB 1s 2.0 KB/s) Copied dest.db to rsyncnet (404 B 7s 57 B/s) Time: 2.5s Wait: 9.2s Checked: 3 paths, 5692 bytes, 5.6 KB Saved: 3 paths, 5692 bytes, 5.6 KB Excluded: 0 Dupbytes: 0 Compression: 29%, 1.4:1 Space: 4.0 KB, 66 KB total No errors [jim@mb]$ ls -l hb total 30600 -rw-r--r-- 1 jim staff 65 Oct 15 14:03 HBID -rw-r--r-- 1 jim staff 76 Oct 15 14:05 dest.conf -rw-r--r-- 1 jim staff 4096 Oct 15 14:31 dest.db -rw-r--r-- 1 jim staff 6291716 Oct 15 14:31 hash.db -rwxr-xr-x 1 jim staff 9182624 Aug 10 09:45 hb -rw-r--r-- 1 jim staff 139264 Oct 15 14:31 hb.db -rw-r--r-- 1 jim staff 4308 Oct 15 14:22 hb.db.0 -rw-r--r-- 1 jim staff 4604 Oct 15 14:25 hb.db.1 -rw-r--r-- 1 jim staff 4012 Oct 15 14:31 hb.db.2 -rw-r--r-- 1 jim staff 6 Oct 15 14:31 hb.lock -rw-r--r-- 1 jim staff 412 Oct 15 14:31 hb.sig -rw-r--r-- 1 jim staff 511 Oct 15 14:03 inex.conf -r-------- 1 jim staff 333 Oct 15 14:03 key.conf 12. Mount the backup as a FUSE filesystem in the background: [jim@mb]$ hb mount -c hb mnt >mount.log 2>&1 & [1] 62772 13. What's in the mounted filesystem? [jim@mb]$ ls -l mnt total 8 drwx------ 1 jim staff 1 Oct 15 14:22 2013-10-15-1422-r0 drwx------ 1 jim staff 1 Oct 15 14:25 2013-10-15-1425-r1 drwx------ 1 jim staff 1 Oct 15 14:31 2013-10-15-1431-r2 drwx------ 1 jim staff 1 Oct 15 14:31 latest [jim@mb]$ find mnt/latest mnt/latest mnt/latest/Users mnt/latest/Users/jim mnt/latest/Users/jim mnt/latest/Users/jim/test100k mnt/latest/Users/jim/test200k mnt/latest/dev mnt/latest/dev/null 14. All file attributes are correct in the mounted filesystem: [jim@mb]$ ls -l mnt/latest/Users/jim total 602 -rw-r--r-- 1 jim staff 102400 Oct 15 14:20 test100k -rw-r--r-- 1 jim staff 204812 Oct 15 14:24 test200k [jim@mb]$ ls -l test*k -rw-r--r-- 1 jim staff 102400 Oct 15 14:20 test100k -rw-r--r-- 1 jim staff 204812 Oct 15 14:24 test200k 15. Test the backup: are the remote and local files equal? [jim@mb]$ time cmp test100k mnt/latest/Users/jim/test100k real 0m2.464s user 0m0.001s sys 0m0.005s [jim@mb]$ time cmp test200k mnt/latest/Users/jim/test200k real 0m2.271s user 0m0.001s sys 0m0.004s [jim@mb]$ time cmp ran10k mnt/latest/Users/jim/test100k cmp: EOF on ran10k real 0m0.005s user 0m0.001s sys 0m0.003s
ran10k and remote test100k are equal for 1st 10k, which is correct. |
Technical >