Re: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances
No. The normal operation is a true inline dedup, but you have an option to delay the dedup. We use the inline method and our OST-connected 6550 has met or exceeded our performance expectations. Cheers, Wayne On Mon, Feb 14, 2011 at 11:06 AM, Robin Small wrote, in part: > On the Quantum, > > > > When we were looking at it a while back, I understood that for each client > you threw at it, it would store a non-deduped initial “base” image of that > client and dedupe around it, as opposed to deduping everything including > base images and incrementals. > > > > Is that still the case? > ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances
Our understanding is that the initial image goes to cache (ssd) then is compressed to permanent storage (RAID6). Subsequent backups are block deduped from that original compressed copy.This is similar to the way it worked with Data Domain except they do it inline on the fly. That is to say it seems you're thinking that DXi always has a full size copy of your original image but I don't believe that to be the case any more than it is with Data Domain. From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Robin Small Sent: Monday, February 14, 2011 11:06 AM To: veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances On the Quantum, When we were looking at it a while back, I understood that for each client you threw at it, it would store a non-deduped initial "base" image of that client and dedupe around it, as opposed to deduping everything including base images and incrementals. Is that still the case? ~ Robin From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Lightner, Jeff Sent: Monday, February 14, 2011 6:03 AM To: veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances We have run the DD460 and DD690 (and continue to run the latter). Back in November we got the DXi 6500 to replace our two DD460s. Performance wise I really like the Data Domain products - they do the compression they promise. So far I've seen nothing with the DXi 6500 that leads me to believe it isn't just as good. We use it for our main Production (4 TB) DB and other large backups. The PROD backup is finishing in a window shorter than it did on the DD690. We went to the Quantum stuff as part of a big data center move that gave us better pricing for the DXi than we would have gotten on a DD not for any technical issues with the DD itself. Proud partner. Susan G. Komen for the Cure. Please consider our environment before printing this e-mail or attachments. -- CONFIDENTIALITY NOTICE: This e-mail may contain privileged or confidential information and is for the sole use of the intended recipient(s). If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you. -- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances
On the Quantum, When we were looking at it a while back, I understood that for each client you threw at it, it would store a non-deduped initial "base" image of that client and dedupe around it, as opposed to deduping everything including base images and incrementals. Is that still the case? ~ Robin From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Lightner, Jeff Sent: Monday, February 14, 2011 6:03 AM To: veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances We have run the DD460 and DD690 (and continue to run the latter). Back in November we got the DXi 6500 to replace our two DD460s. Performance wise I really like the Data Domain products - they do the compression they promise. So far I've seen nothing with the DXi 6500 that leads me to believe it isn't just as good. We use it for our main Production (4 TB) DB and other large backups. The PROD backup is finishing in a window shorter than it did on the DD690. We went to the Quantum stuff as part of a big data center move that gave us better pricing for the DXi than we would have gotten on a DD not for any technical issues with the DD itself. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances
We have run the DD460 and DD690 (and continue to run the latter). Back in November we got the DXi 6500 to replace our two DD460s. Performance wise I really like the Data Domain products - they do the compression they promise. So far I've seen nothing with the DXi 6500 that leads me to believe it isn't just as good. We use it for our main Production (4 TB) DB and other large backups. The PROD backup is finishing in a window shorter than it did on the DD690. We went to the Quantum stuff as part of a big data center move that gave us better pricing for the DXi than we would have gotten on a DD not for any technical issues with the DD itself. From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Howard Sherman Sent: Sunday, February 13, 2011 12:06 PM To: veritas-bu@mailman.eng.auburn.edu Subject: [Veritas-bu] Quantum's DXi Series of Dedupe Appliances We are a NetBackup shop looking to implement a disk based backup infrastructure utilizing data deduplication, to evolve our tape infrastructure to more of a secondary copy, archival media. For the central data center at least we are leaning towards a deduplication appliance solution. Of course we're taking a serious look at Data Domain. Their Jan 18 announcement's performance numbers for the DD890 and the Global Dedupe Array are impressive. I'm intrigued, though, by this lesser known player, Quantum. Their DXi8500 certainly boasts more modest performance numbers does than the DD890, but it has three features that catch my attention: 1) SAS drives; 2) Direct-To-Tape; 3) The options to inline, post-process or not dedupe at all a segment of data. I'd appreciate any comments from folks who run or have run a model from Quantum's DXi series, as well as from anyone who evaluated them vs. Data Domain. Thanks. Proud partner. Susan G. Komen for the Cure. Please consider our environment before printing this e-mail or attachments. -- CONFIDENTIALITY NOTICE: This e-mail may contain privileged or confidential information and is for the sole use of the intended recipient(s). If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you. -- ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
