Yeah, have been migrating all file n print to filers and utilising
VTL's. in essence wont be wasting any drives as they are virtual and in
abundance should we need them. Additionally no requirement for SSO for
the same reason, however we need them configured in NBU for the ndmp
device paths and was trying to alleviate hitting a NBU limitation
further down the line.
In a physical non-ndmp drive env we would never reach a limitation as
the media server would be taking the overhead and would never try
configure the amount of drives we are intending to.
Regards
David Clooney
-----Original Message-----
From: Justin Piszcz [mailto:jpiszcz AT lucidpixels DOT com]
Sent: 20 July 2009 12:57
To: Clooney, David
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Remommended maximum # of drives per media
server.
Hi,
When I used to use NDMP I had one media server (i did not setup the
initial environment) but the way it was setup is there was one media
server with LTO-2 drives that were attached to the netapp/toaster), SSO
was not used in the environment, nor were any fiber switches, this is a
waste of two drives in the big picture, but this environment was
specifically setup to backup this netapp/toaster unit.
Do you have a lot of netapp filers? Do you use SSO?
Justin.
On Mon, 20 Jul 2009, Clooney, David wrote:
> 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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