For the record, here's a link to the GlassHouse white paper - it is very good but, as Shawn pointed out, rather old now and quite a few of the figures are out of date (I should disclose I'm doing some Data Domain/TSM work for GlassHouse at the moment):
http://pdf.edocr.com/6cb6a7b31a5be6dd526302c6e23918d0f37a5669.pdf There's another paper too from Data Domain which talks very practically about configuring TSM 5.5 for CIFS, NFS and VTL - I can't find a link for that online (I can't even remember where I pulled it from now), but if anyone would like a copy do ping me. Again the recommendation cited in this is, "Do not enable compression on the TSM Client". __________________ David McClelland London, UK -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of Shawn Drew Sent: 26 August 2010 21:50 To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Data Domain: Data Domain, and SQL-Backtrack with Sybase databases >From what I understand the EMC/DD Best Practice is to use NFS/CIFS mounts with File device classes over 10gb connections. The main benefit cited is the concurrent access to file volumes. There is a TSM/DD Best Practices document out there from Glasshouse a few years ago that mentions this. (Which might be where EMC got it) Regards, Shawn ________________________________________________ Shawn Drew Internet t...@networkc.co.uk Sent by: ADSM-L@VM.MARIST.EDU 08/26/2010 04:38 PM Please respond to ADSM-L@VM.MARIST.EDU To ADSM-L cc Subject Re: [ADSM-L] Data Domain: Data Domain, and SQL-Backtrack with Sybase databases Curtis, >> Data Domain has good market share, but very few DD customers use VTL. Really? That surprises me a little (i.e., the marginalised VTL usage) and isn't necessarily representative of the TSM customers I've spoken to or worked with using DDRs, many of whom still use the VTL functionality. I can't comment on whether this is so much the case with shops that use other backup software though (e.g., I know NBU has its own OST interface). In any case, whether through VTL or NFS/CIFS the principle is the same and of course you're right, pre-appliance compression or even encryption can be catastrophic to data de-dupe ratios. Without knowing any more, it sounds like you may have to make a compromise somewhere without changing your current config Nancy, either in terms of backup data storage footprint or RPO. Cheers, __________________ David McClelland London, UK On 26 Aug 2010, at 19:10, Nobody <wcplis...@gmail.com> wrote: > Data Domain has good market share, but very few DD customers use > VTL. This message and any attachments (the "message") is intended solely for the addressees and is confidential. If you receive this message in error, please delete it and immediately notify the sender. Any use not in accord with its purpose, any dissemination or disclosure, either whole or partial, is prohibited except formal approval. The internet can not guarantee the integrity of this message. BNP PARIBAS (and its subsidiaries) shall (will) not therefore be liable for the message if modified. Please note that certain functions and services for BNP Paribas may be performed by BNP Paribas RCC, Inc. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3088 - Release Date: 08/22/10 19:35:00
