From: Tena Sakai <tsakai@gallo.ucsf.edu>
To: Craig James <craig_james@emolecules.com>
To: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: Re: [NOVICE] - SAN/NAS/DAS - Need advises
Date: Tue, 7 Sep 2010 13:47:11 -0700
Message-ID: <C8ABF2DF.C419%tsakai@gallo.ucsf.edu> (raw)
In-Reply-To: <4C869432.3020604@emolecules.com>
Hi everybody,
I have been reading this thread and I got the idea that
SANs to avoid, but would somebody please give a bit of
Comparison/perspective on NAS?
Regards,
Tena Sakai
tsakai@gallo.ucsf.edu
On 9/7/10 12:36 PM, "Craig James" <craig_james@emolecules.com> wrote:
> On 9/7/10 12:06 PM, Jesper Krogh wrote:
>> On 2010-09-07 20:42, Scott Marlowe wrote:
>>> With the right supplier, you can plug in literally 100 hard drives to
>>> a regular server with DAS and for a fraction of the cost of a SAN.
>> Ok, recently I have compared prices a NexSan SASBeast with 42 15K SAS drives
>> with a HP MDS600 with 15K SAS drives.
>>
>> The first is 8gbit Fibre Channel, the last is 3Gbit DAS SAS. The
>> fibre channel version is about 20% more expensive pr TB.
>>
>> So of course it is a "fraction of the cost of a SAN", but it is a
>> fairly small one.
>
> Are you really comparing equal systems? "8gbit Fibre Channel" means a single
> Fibre Channel shared by 42 disks, whereas "3GBit DAS SAS" means 42 3gbit
> channels running in parallel. It seems like you'd really need some realistic
> benchmarks that emulate your actual server load before you'd know how these
> two systems compare.
>
> Craig
>
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To: pgsql-admin@postgresql.org
Cc: tsakai@gallo.ucsf.edu, craig_james@emolecules.com
Subject: Re: [NOVICE] - SAN/NAS/DAS - Need advises
In-Reply-To: <C8ABF2DF.C419%tsakai@gallo.ucsf.edu>
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