Thanks Justin
Very useful info, however I was thinking more along the lines of a NBU
limitation as a lot of the drives we are configuring are in fact
filer/NDMP based drives and the overheads will be on the filer.
Regards
David Clooney
-----Original Message-----
From: Justin Piszcz [mailto:jpiszcz AT lucidpixels DOT com]
Sent: 20 July 2009 12:42
To: Clooney, David
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Remommended maximum # of drives per media
server.
Hi Dave,
That depends on how much throughput you can drive through the
motherboard/network/disk.
LTO-3 = 90MiB/s for compressed data
LTO-4 = 120MiB/s for compressed data
(when rating, people usually rate for 180MiB/s and 240MiB/s to account
for
2:1 compression)
So if you have 10 gigabit ethernet (or) a fast disk array, you need to
make sure there is enough bandwidth (today, PCI-e lanes) on the
motherboard to handle how many drives you plan on putting in a server.
This is just my opinion:
Minimum drives per media server: 2 (to faciliate a restore incase one
drive goes down and you are not using the FORCE_RESTORE media server
directive).
LTO-2 = 2 drives per server (hp dl38[0-5]* class + 1gbps)
LTO-3 = 4 drives per server (same class + 10gbps)
LTO-4 = 3-4 drives per server (if same class of hw + 10gbps)
What kind of configuration(s) does everyone here use? How many drives
per
media server?
Justin.
On Mon, 20 Jul 2009, Clooney, David wrote:
> Hi All
>
>
>
> Does anyone know the symantec maximum number of recommended drives per
> media server?
>
>
>
> Regards
>
>
>
> Dave
>
>
>
>
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