DAOS in detail from Collin Murray and Patrick Mancuso
September 17 2009
The NELotus user group met in the Boston area last night, with a presentation on Domino 8.5 DAOS from Collin Murray and Pat Mancuso. Their presentation, 30 slides of details on the Domino Attachment and Object Services, is available for download. DAOS has really been the "killer feature" for Domino 8.5 upgrades. I'm routinely hearing of 50%+ reduction in disk space utilization on Domino servers running DAOS. A very good reason to upgrade -- as one in four Domino servers already has been.
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Richard Schwartz http://www.poweroftheschwartz.com | 9/17/2009 10:04:53 PM
Collin and Pat did a great job. I thought I knew everything I needed to know about DAOS from design partner sessions and other presentations, but I was wrong. I picked up several tips and tidbits (try saying that three times, fast!) from them. I also got another chance to put in a word for us ISVs who want access to APIs for some of the DAOS exploitation/optimization capabilities that are being built into Domino. All-in-all a very useful user group meeting.
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Albert Buendia | 9/18/2009 2:43:17 AM
Please, can anyone "translate" in plain English or other words what Erik Brooks sayed "and NSF on SSD is just plain SICK AND WRONG"? For the Spanish audience, it's difficult to understand that expression. Thanks in advance. Albert.
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Erik Brooks | 9/18/2009 6:15:19 AM
@3 - I was afraid of that! Sorry for the confusion.
"Off the chain" and "sick and wrong" are both slang.
"Off the chain" is like when a big scary dog in your backyard is off of its chain, it becomes ferocious and unstoppable. "Sick and wrong" is similar. Something is so strange that you smile wickedly. >:-)
In simple terms: very, VERY fast. So fast it is disturbing.
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Richard Schwartz http://www.poweroftheschwartz.com | 9/18/2009 6:20:26 AM
@3: It makes very little sense in English either ;-)
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Carlos Hernandez http://www.ccsmed.com/english/index.asp | 9/18/2009 10:40:34 AM
We are ready for this, I just finish upgrading 7.0.3 servers to 8.5. Doing the mail file update by locations, then enabling DAOS. We also use Act! for Notes huge "45G", this will help a lot. Great slice presentation....CH
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Lars Berntrop-Bos | 9/18/2009 3:42:53 PM
@Erik: 64GB limit if enforced by a Quota still counts the attacmnets when using DAOS
@Ed: The presentation needs a small fix: th link to the DAOS backup article should read: { Link }
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Nathan T. Freeman http://nathan.lotus911.com | 9/19/2009 9:32:53 AM
@7 why would anyone enforce a 64GB limit by quota? The operating system is going to enforce it for you anyway.
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Albert Buendia http://www.slug.es | 9/21/2009 2:14:20 AM
Erik, excellent clarification !
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Lars Berntrop-Bos | 9/21/2009 5:45:57 PM
@8 Not when DAOS filters out attachments, quota limiting will add the nsf size and the attachment sizes. the size on disk of the nsf part will be below 64 GB.
Awesome, awesome slideshow. We haven't implemented DAOS here yet (still on 7.0.3) but are dying to do so for our mammoth custom web app.
We've got one DB in particular that is ~60GB, of which 59GB are attachments, with more added daily. We'll be enabling DAOS there and that should drop the NSF size to 1 GB. That should significantly help performance, and we won't need to keep pruning attachments from the db as it gets close to the magic 64 GB limit.
After that, we'll leverage the "cheaper storage" angle by going the other direction -- we'll leave the file attachments on current storage, and we'll be putting the remaining 1 GB of NSF on a Solid State drive array. Performance should be "off the chain." I'll definitely make a blog post about that. I've done some preliminary research, and NSF on SSD is just plain SICK AND WRONG.