A client of mine has a similar problem. The solution implemented there was a NAS box with snapshots and remote mirroring. Snapshots provide nice short backups and restores without taking a large amount of disk. Asynchronous remote mirroring provides easy DR. An additional NDMP backup, at the remote site, provides an additional level of protection. This solution took all the pain of file server backups away and was surprisingly easy to cost justify. Orville L. Lantto Glasshouse Technologies, Inc.
________________________________ From: ADSM: Dist Stor Manager on behalf of Jon Evans Sent: Tue 5/16/2006 9:49 AM To: [email protected] Subject: Re: [ADSM-L] Disk-to-Disk Backup I have recently tested a DD460 for exactly the same reason. The results showed that compression was good (upto 20x) but throughput was not so good. The more clients you add, the slower each backup stream becomes. Off course, much depends on your infrastructure, and these results were based on a windows filesystem, running across a gb network. Unfortunately, with millions of small files it is very difficult to improve performance significantly. Personally, I could not improve backup or restore performance over an LTO2 or LTO3 tape drive, and the tape drives still work out cheaper.. so I decided against it at this time.. Regards Jon Evans -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Christoph Pilgram Sent: 16 May 2006 14:43 To: [email protected] Subject: Disk-to-Disk Backup Hi all, Because we have problems to hold our service level agreements with the customers for restoring big file-servers (10 Mio files, 1TB disk-space in one filesystem), we are thinking about storing the backups not anymore on tape but on disk. Does anybody has experience with that kind of storage-pool for about 40 TB of backup data ? Does anybody use for example a "Data Domain DD460" or other systems using COS to reduce the amount of data. Thanks for help Chris ---------------------------------------------------------------------- This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message.
