[HCS-D] netapp notes

Britt Bolen bb at eludicate.com
Fri May 20 09:30:03 EDT 2005

My opinion is to use multiple flexible volumes because volumes are the 
generally managable storage chunk.  you can have independant snap 
schedules, backup schedules, quota settings, export access permissions. 
  Since these are flex vols you can resize them whenever you want.


Britt Bolen
bb at eludicate.com
On May 20, 2005, at 1:16 AM, Matt Gline wrote:

> Well Ladies and Gents,
> The time has come to make some important decisions. The netapp works
> brilliantly. Currently, it's set up to use 7 active disks with one hot
> spare, and the disk space is in two volumes - the root partition, 30
> gigs large or so, which was on there when we got it and contains the
> ONTAP operating system, and a big 300 gig volume (240 or so gigs usable
> space plus 60 gigs reserved for snapshots). Both of these are mounted 
> on
> frog, so feel free to run df and ogle :) For those interested in boring
> technical details, right now it's connected to frog directly (frog has
> two ethernet interfaces, thanks to Yves and Matt Fasman who put the
> second one in this morning). Bill Ouchark has suggested he'll be able 
> to
> find us a vlan capable fast switch - hopefully a gigabit switch - in
> which case I think we'll set it up with two vlans - one external vlan,
> one internal "storage" vlan. There are some complications involving the
> speed of our link, but these are kinks to be worked out.
> The questions I'd like to answer in short order, as I'd like to copy
> /usr/home over very soon (potentially early next week) and start using
> the thing, are:
> 1) Should we adjust our disk allocation scheme? Is there any reason we
> want to break up the storage in a different way? We get to set 
> different
> snapshot rules on a per-volume basis, ONTAP's notion of dump seems
> volume aware... is there any reason, for example, we'd like these 
> things
> to be different for people than for groups? If I understand flex 
> volumes
> correctly (there's an expert on this list who will I'm sure read this
> carefully and correct all my mistakes) we can always resize things
> later, so I don't think this decision is particularly pressing but it's
> worth thinking about.
> 2) What do we want to do for a snapshot schedule? That is, when do we
> want to take snapshots, and how long do we want to keep them for? We 
> can
> keep some number of weeklies, some number of nightlies, and some number
> of hourlies, and can determine on which hours the hourlies are taken. I
> think we probably want to store about 3 past weekly snapshots, because 
> 3
> or 4 weeks is the amount of time it takes some student groups to 
> realize
> something is missing or broken...
> 3) The Netapp supports some really cool things like WebDAV,
> which it might be fun to take advantage of and offer to student groups
> if we can figure out a paradigm for doing so. If we want to try this, I
> think we'll have to scrap the whole "keeping the storage network
> separate" paradigm. Thoughts?
> I'm sure there's more I'm leaving out, but that's all I've got for the
> moment. I'd also like to move our quota management over to the netapp,
> which can handle user quotas although it needs first to have some
> concept of user. It certainly supports NIS (ick) but I think if I
> understand correctly it also supports LDAP, which is something we've
> been wanting to set up anyway...
> Cheers,
> --Matt
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