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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