DragonFly users List (threaded) for 2011-07
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Real World DragonFlyBSD Hammer DeDup figures from HiFX - Second Disk 20% ( 88 GB ) Disk Space reclaimed
Hi,
I De-Duped the second disk on the backup Server today.
Before De-Dup
Filesystem Size Used Avail Capacity Mounted on
Backup2 454G 335G 119G 74% /Backup2
After De-Dup
Filesystem Size Used Avail Capacity Mounted on
Backup2 454G 247G 207G 54% /Backup2
So 20% or 88 GB reclaimed without deleting anything :-)
No. of PFSes - 3 Slaves and 3 Masters
De-dup Simulate
====================================================================
dfly-bkpsrv# hammer dedup-simulate /Backup2
Dedup-simulate /Backup2: objspace 8000000000000000:0000
7fffffffffffffff:ffff pfs_id 0
Dedup-simulate /Backup2 succeeded
Simulated dedup ratio = 1.26
dfly-bkpsrv# hammer dedup-simulate /Backup2/pfs/Data
Dedup-simulate /Backup2/pfs/Data: objspace 8000000000000000:0000
7fffffffffffffff:ffff pfs_id 1
Dedup-simulate /Backup2/pfs/Data succeeded
Simulated dedup ratio = 1.37
You have new mail.
dfly-bkpsrv# hammer dedup-simulate /Backup2/pfs/VersionControl
Dedup-simulate /Backup2/pfs/VersionControl: objspace
8000000000000000:0000 7fffffffffffffff:ffff pfs_id 2
Dedup-simulate /Backup2/pfs/VersionControl succeeded
Simulated dedup ratio = 2.79
dfly-bkpsrv# hammer dedup-simulate /Backup2/pfs/test
Dedup-simulate /Backup2/pfs/test: objspace 8000000000000000:0000
7fffffffffffffff:ffff pfs_id 3
Dedup-simulate /Backup2/pfs/test succeeded
Simulated dedup ratio = 0.00
dfly-bkpsrv# hammer dedup-simulate /Backup2/www-daily-bak/www-hot
Dedup-simulate /Backup2/www-daily-bak/www-hot: objspace
8000000000000000:0000 7fffffffffffffff:ffff pfs_id 5
Dedup-simulate /Backup2/www-daily-bak/www-hot succeeded
Simulated dedup ratio = 1.64
dfly-bkpsrv# hammer dedup-simulate /Backup2/mysql-daily-bak/mysql-hot
Dedup-simulate /Backup2/mysql-daily-bak/mysql-hot: objspace
8000000000000000:0000 7fffffffffffffff:ffff pfs_id 6
Dedup-simulate /Backup2/mysql-daily-bak/mysql-hot succeeded
Simulated dedup ratio = 5.99
====================================================================
Real De-dup
=========================================================
dfly-bkpsrv# hammer dedup /Backup2
Dedup /Backup2: objspace 8000000000000000:0000 7fffffffffffffff:ffff pfs_id 0
Dedup /Backup2 succeeded
Dedup ratio = 1.25
580 MB referenced
462 MB allocated
2274 KB skipped
0 CRC collisions
0 SHA collisions
0 bigblock underflows
dfly-bkpsrv# hammer dedup /Backup2/Data
Dedup /Backup2/Data: objspace 8000000000000000:0000
7fffffffffffffff:ffff pfs_id 1
Dedup /Backup2/Data succeeded
Dedup ratio = 1.37
266 GB referenced
194 GB allocated
31 MB skipped
1960 CRC collisions
0 SHA collisions
20 bigblock underflows
You have new mail.
dfly-bkpsrv# hammer dedup /Backup2/VersionControl
Dedup /Backup2/VersionControl: objspace 8000000000000000:0000
7fffffffffffffff:ffff pfs_id 2
Dedup /Backup2/VersionControl succeeded
Dedup ratio = 2.75
160 MB referenced
58 MB allocated
861 KB skipped
0 CRC collisions
0 SHA collisions
0 bigblock underflows
You have new mail.
dfly-bkpsrv# hammer dedup /Backup2/test
Dedup /Backup2/test: objspace 8000000000000000:0000
7fffffffffffffff:ffff pfs_id 3
Dedup /Backup2/test succeeded
Dedup ratio = 0.00
0 B referenced
0 B allocated
0 B skipped
0 CRC collisions
0 SHA collisions
0 bigblock underflows
dfly-bkpsrv# hammer dedup /Backup2/www-daily-bak/www-hot
Dedup /Backup2/www-daily-bak/www-hot: objspace 8000000000000000:0000
7fffffffffffffff:ffff pfs_id 5
Dedup /Backup2/www-daily-bak/www-hot succeeded
Dedup ratio = 1.64
5599 MB referenced
3420 MB allocated
12 MB skipped
4 CRC collisions
0 SHA collisions
0 bigblock underflows
dfly-bkpsrv# hammer dedup /Backup2/mysql-daily-bak/mysql-hot
Dedup /Backup2/mysql-daily-bak/mysql-hot: objspace
8000000000000000:0000 7fffffffffffffff:ffff pfs_id 6
Dedup /Backup2/mysql-daily-bak/mysql-hot succeeded
Dedup ratio = 6.28
49 GB referenced
8079 MB allocated
0 B skipped
0 CRC collisions
0 SHA collisions
0 bigblock underflows
You have new mail.
============================================================
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