There's a flaw in your parenthetical observation. If the disk fails in a d2d backup, and the tape is backing up from the backup disk, then the tape is worthless as far as a secondary backup.
On Fri, Feb 4, 2011 at 2:59 PM, Paul Hutchings <[email protected]>wrote: > Fair point on the flexibility, it just seemed a little costly for a "poor > mans" solution. > > My own personal opinion, stick with an aux copy on tape for that warm fuzzy > feeling when you're standing in the burning embers and need to know you've > access to a good backup (or when the disks fail or you mess up) - once the > d2d backup is done your backup window doesn't matter so you can take as long > as you like to do the aux copy to tape. > > Do check out how BE does dedupe and synthetic full backups - one of the big > selling points of D2D and dedupe is this "incremental forever" business > where you take your initial known, good, full backup, and from that point > onwards you only ever take incrementals and let the backup software > construct fulls from your initial full, plus the incrementals. > > -----Original Message----- > From: Roger Wright [mailto:[email protected]] > Sent: 04 February 2011 19:53 > To: NT System Admin Issues > Subject: Re: Dedupe Thoughts? > > Yep, definitely would want to exit the tape scene as soon as possible. > I was really looking at the Synology for the flexibility of either eSATA > or NAS connectivity. There may be even more cost-effective solutions, but > we've had great luck so far with the one Synology NAS we purchased. > > > Roger Wright > ___ > > "The internet is a great way to get on the net." - Bob Dole > > > > > On Fri, Feb 4, 2011 at 2:27 PM, Paul Hutchings <[email protected]> > wrote: > > How come you're looking at NAS rather than just shovelling a few 2tb > > drives in your backup server? > > > > I'm looking into doing something very similar myself (we use > > Commvault/Simpana) and the rule of thumb on disk space, assuming > > you're not paying per Tb stored, is disk is cheap, and with dedupe > > rates what they are for average data, you'd be mad not to shovel in as > > much as you can afford and leave tape as the very last resort. > > > > -----Original Message----- > > From: Roger Wright [mailto:[email protected]] > > Sent: 04 February 2011 18:08 > > To: NT System Admin Issues > > Subject: Dedupe Thoughts? > > > > I'm looking at some options for a "poor man's" deduplication system > > for backups. A Data Domain or Exagrid solution would be preferred but > > not feasible at this time. > > > > We're currently backing up a little over 4 TB to LTO3 tape and have > > outgrown our backup window, library capacity, and RTO. > > > > I'm thinking of using BE 2010's Deduplication option for the engine > > and something like the Synology DS1511+ with 5 - 2GB drives for 8 TB > > of storage (w/RAID5 or just a hot spare). Then I could offload to > > tape for off-site storage or script replication to another unit at a > > branch office. > > > > Any best practices thoughts for sizing the storage for the deduped data? > > Does it just depend on the ratio achieved and the storage and the > > number of backup sets retained? One nice thing about the Synology > > system is it can be easily expanded to up to 15 disks. > > > > A Data Domain or Exagrid solution would be preferred but not feasible > > at this time. > > > > > > Roger Wright > > ___ > > > > "The internet is a great way to get on the net." - Bob Dole > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ > > <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > > > --- > > To manage subscriptions click here: > > http://lyris.sunbelt-software.com/read/my_forums/ > > or send an email to [email protected] > > with the body: unsubscribe ntsysadmin > > > > > > -- > > MIRA Ltd > > > > Watling Street, Nuneaton, Warwickshire, CV10 0TU, England Registered > > in England and Wales No. 402570 VAT Registration GB 100 1464 84 > > > > The contents of this e-mail are confidential and are solely for the use > of the intended recipient. If you receive this e-mail in error, please > delete it and notify us either by e-mail, telephone or fax. You should not > copy, forward or otherwise disclose the content of the e-mail as this is > prohibited. > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ > > <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > > > --- > > To manage subscriptions click here: > > http://lyris.sunbelt-software.com/read/my_forums/ > > or send an email to [email protected] > > with the body: unsubscribe ntsysadmin > > > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ < > http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
