19 Jul 13:12
Real World DragonFlyBSD Hammer DeDup figures - Reclaiming more than 1/4th ( 30% ) Disk Space from an Almost Full Drive
Siju George <sgeorge.ml <at> gmail.com>
2011-07-19 11:12:31 GMT
2011-07-19 11:12:31 GMT
Hi, One of the DragonFlyBSD Backup Server has around 10 years of Company Archives. This is the result of de-dup feature Short Sumary before dedup of firtst Hard Disk Filesystem Size Used Avail Capacity Mounted on Backup1 454G 451G 2.8G 99% /Backup1 Short Sumary after dedup of firtst Hard Disk Filesystem Size Used Avail Capacity Mounted on Backup1 454G 313G 141G 69% /Backup1 Reclaimed 138 GB i.e 30% of Disk space without deleting anything or considerably affecting the perfomance of the Server. Full Story: The first backups server was Debian Sarge, then Debian Etch and then OpenBSD with RAIDFRAME mirrors because it was the only Unix/Linux that would even detect the 120 GB hard disks we had back then. Later I turned to DragonFlyBSD due to HAMMER ( No fsck, No RAID Parity chceks and Easy FS Snapshots ) So this Dragonfly backup server has around 10 years old backups of 1) Web files of Projects ( html, php, images etc ) 2) SQL dumps both zipped and unzipped .Hammer snapshots gave me the(Continue reading)
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