Could you share those reasons? I would be interested because we tested one, and the NFS seemed to work great. Thanks.
On Tue, Jan 12, 2010 at 9:04 AM, Howard Coles <[email protected] > wrote: > Thanks. I don't want to do the NFS stuff with TSM for a few reasons, > but this helps. > > > See Ya' > Howard Coles Jr. > John 3:16! > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of > Strand, Neil B. > Sent: Tuesday, January 12, 2010 8:55 AM > To: [email protected] > Subject: Re: [ADSM-L] DataDomain VTL > > Howard, > I have a pair of DDR410s and pair of DDR510's that are configured for > NFS. The 510's are being used to store vRanger backups of a VM > environment. Compression/deduplication is incredible for this > application. 47TB(terabytes) are stored on 811GB (Gigabytes). Now > realize that there is a lot of redundancy with VMs and this environment > does not experience a lot of change, but the ability to store 30+ days > worth of full backups of 30 or 40 VMs on less than a TB or storage, > approaches the cost of tape (excluding electricity). The 510 and 410 > models are out of date and I have not messed with the VTL configuration > so cannot speak to that specific feature. > > Configuration is relatively simple. Performance is nothing to brag > about for these models (except the deduplication/compression), The one > drawback is that a couple of filesystem reconfiguration tasks require > taking the filesystem offline. The systems have been running for > several years with only an occasional disk replacement. OS upgrades are > relatively straightforward - outage required. > > I did some testing with TSM using an NFS mount. TSM was configured > to use the NFS mount with FILE device class with 2GB files. My > intention was to compare DDR deduplication with TSM deduplication. I > never got back to testing TSM deduplication but the DDR deduplication > was 281GB stored on 58GB = 80% savings. Now this data was from a > handfull of windows workstations, so there was a lot or redundancy in > the data. > > Generally, I found the DDRs simple to set up, reliable, maintainable, > and do what they are supposed to do - crush bits together into the > smallest possible space. Performance is good - just don't expect a > screaming fast system - at the low end. The high end systems and newer > systems advertise greater performance. > > Cheers, > Neil Strand > Storage Engineer - Legg Mason > Baltimore, MD. > (410) 580-7491 > Whatever you can do or believe you can, begin it. > Boldness has genius, power and magic. > > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of > Howard Coles > Sent: Monday, January 11, 2010 4:58 PM > To: [email protected] > Subject: [ADSM-L] DataDomain VTL > > Is anyone out there using a DataDomain VTL? I'm getting some pressure > to look at this, and I'd like to find some honest opinions of them. I > know that some time back there were some conversations around this, but > some tech has been updated and DD has been bought by EMC, etc. So, if > you have one, and would like to share your opinion I'd appreciate it. > > > > See Ya' > > Howard Coles Jr. > > Sr. Systems Engineer > > (615) 296-3416 > > John 3:16! > > > > > > IMPORTANT: E-mail sent through the Internet is not secure. Legg Mason > therefore recommends that you do not send any confidential or sensitive > information to us via electronic mail, including social security > numbers, account numbers, or personal identification numbers. Delivery, > and or timely delivery of Internet mail is not guaranteed. Legg Mason > therefore recommends that you do not send time sensitive > or action-oriented messages to us via electronic mail. > > This message is intended for the addressee only and may contain > privileged or confidential information. Unless you are the intended > recipient, you may not use, copy or disclose to anyone any information > contained in this message. If you have received this message in error, > please notify the author by replying to this message and then kindly > delete the message. Thank you. > -- Andy Carlson --------------------------------------------------------------------------- Gamecube:$150,PSO:$50,Broadband Adapter: $35, Hunters License: $8.95/month, The feeling of seeing the red box with the item you want in it:Priceless.
