Re: [OpenAFS] Volume "type" mapping to certain partitions

2013-01-16 Thread Lars Schimmer 
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On 2013-01-15 20:24, Jeff Blaine wrote:
> Are people still doing things like mapping user home directory 
> volumes to certain partitions on certain servers, keeping track in
> a database, etc?
> 
> What does this buy, assuming all data served from storage comes 
> from like hardware (speed, capacity, etc)?
> 
> We've kept up this practice and I'm not real sure why we bother. I
> cannot see any case where it has helped us in any significant way
> in the last 15 years (my hire date, this practice was already in
> place then) and am looking to decomplexificate our environment 
> where possible.
> 
> Thoughts?

We do have a order of "all homes on this partition, all project on
another" to simplify RO release and lazy-man-backup.
As not all partitions are equally fast, it does help.


MfG,
Lars Schimmer
- -- 
- -
TU Graz, Institut fr ComputerGraphik & WissensVisualisierung
Tel: +43 316 873-5405   E-Mail: l.schim...@cgv.tugraz.at
Fax: +43 316 873-5402   PGP-Key-ID: 0x4A9B1723


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Re: [OpenAFS] Volume "type" mapping to certain partitions

2013-01-16 Thread Arne Wiebalck 

On Jan 15, 2013, at 8:24 PM, Jeff Blaine 
mailto:jbla...@kickflop.net>> wrote:

Are people still doing things like mapping user home directory
volumes to certain partitions on certain servers, keeping track
in a database, etc?

Yes.


What does this buy, assuming all data served from storage comes
from like hardware (speed, capacity, etc)?

We use this to separate activities (interactive vs. batch), to separate
different user communities (to avoid cross-talk) or to manage different
service levels (e.g. with or without diesel backup for power).

We used to also have different types of hardware for the different pools,
but this is becoming less relevant these days.

Cheers,
 Arne

Re: [OpenAFS] Volume "type" mapping to certain partitions

2013-01-15 Thread Russ Allbery 
Jeff Blaine  writes:

> Are people still doing things like mapping user home directory volumes
> to certain partitions on certain servers, keeping track in a database,
> etc?

Yes.

> What does this buy, assuming all data served from storage comes from
> like hardware (speed, capacity, etc)?

Nothing.

We do this because that's *not* the case; we put some volume types on
slower servers with crappy storage.

-- 
Russ Allbery (r...@stanford.edu) 
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[OpenAFS] Volume "type" mapping to certain partitions

2013-01-15 Thread Jeff Blaine 

Are people still doing things like mapping user home directory
volumes to certain partitions on certain servers, keeping track
in a database, etc?

What does this buy, assuming all data served from storage comes
from like hardware (speed, capacity, etc)?

We've kept up this practice and I'm not real sure why we bother.
I cannot see any case where it has helped us in any significant
way in the last 15 years (my hire date, this practice was already
in place then) and am looking to decomplexificate our environment
where possible.

Thoughts?
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