[asterisk-users] capacity

[Steve Totaro]

RAID arguments (preference really) aside, 4k - 6k worth of student
voicemails is going to require quite a bit of storage space.

Thanks,
Steve Totaro

On Wed, Mar 19, 2008 at 12:01 PM, Drew Gibson <drew at oanda.com> wrote:
> Having ventured high enough and far enough to view the curvature of the
>  Earth and having stayed up late enough long enough (why do disks only
>  fail at the weekend?) to rebuild and restore RAID 5 sets, I proffer the
>  following (not so) Humble Opinion .....
>
>  Dual power supplies, two thumbs up
>
>  but RAID 5 is only good for reducing storage costs on large volumes of
>  data. It reduces performance and reliability over RAID 1. Don't put the
>  OS on RAID 5 unless you like rebuilding servers from bare metal. It's
>  much easier to rebuild and restore the data on RAID 5 sets if the OS is
>  already up and running.
>
>  Your OS and other system critical files (Asterisk) should be on RAID 1
>  for performance, redundancy and cost reasons.
>
>  More disks = higher cost and higher chance of failure.
>
>  Asterisk in general does not need much disk storage. The minimum drive
>  size available in a new server tends to be overkill. Two drives as RAID
>  1 gives you redundancy and performance. Adding a third drive for RAID 5
>  adds cost, increases complexity and reduces reliability just to add
>  storage capacity that you don't really need. (but the reseller WILL make
>  more money and impress you with their command of the big words and
>  acronyms on the spec sheet.)
>
>  If and only if you need to store many hundreds of gigs of data (eg.
>  recording a very large volume of calls) then RAID 5 becomes useful (or
>  RAID 10 or RAID n). You should add this "bulk storage" IN ADDITION TO
>  the mirrored pair holding the OS.
>
>  regards,
>
>  Drew
>
>
>
>
>  Steve Totaro wrote:
>  > And I can post a link that shows a bunch of guys think the earth is
>  > flat with a 5/10 google ranking also (like the barf guys).
>  > http://www.alaska.net/~clund/e_djublonskopf/Flatearthsociety.htm
>  >
>  > I usually just call my guy at CDW and give him my needs, he is a
>  > former techie gone sales.  He puts together a quote and emails it to
>  > me for approval.
>  >
>  > I find HP server are very robust and rock solid at a decent price
>  > point (IBM as well).  I like the 380 because you get six hot swap scsi
>  > bays and redundant power supplies in a 2u profile, also, Digium and
>  > Sangoma T1 cards have never given me an issue.
>  >
>  > Many on this list love Supermicro, I have yet to try them but I will
>  > in the near future.  I have not heard a single complaint, only rave
>  > reviews.
>  >
>  > I guess my original point was going for redundancy as far as storage
>  > and power supplies with your dollar, not the fastest proc or maxed out
>  > RAM that will not be needed.  Regardless of the actual hardware or
>  > RAID setup, that is the angle I suggest you take.  4k - 6k students
>  > will require quite a bit of storage.
>  >
>  > Thanks,
>  > Steve Totaro
>  >
>  > On Wed, Mar 19, 2008 at 9:38 AM, Ron Joffe <rjoffe at yahoo.com> wrote:
>  >
>  >> On Tuesday 18 March 2008 22:12, Steve Totaro wrote:
>  >>  > For your use, I would go for a RAID 5
>  >>
>  >>  I would highly recommend against a raid 5 set. I can give you more details if
>  >>  you are interested, but these guys have most if it down : www.baarf.com see
>  >>  the link on the left on "why should I not use Raid 5"
>  >>
>  >>  Ron
>  >>
>  >>
>  >>
>  >>
>  >>
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>
>  --
>  Drew Gibson
>
>  Systems Administrator
>  OANDA Corporation
>  www.oanda.com
>
>
>
>
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