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Re: XFS use within multi-threaded apps

To: xfs@xxxxxxxxxxx
Subject: Re: XFS use within multi-threaded apps
From: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
Date: Sat, 23 Oct 2010 21:13:58 -0500
In-reply-to: <AANLkTi=RZ=qf5xqMQNZjZaikAdw12PzbzD3vo-hZfNHT@xxxxxxxxxxxxxx>
References: <AANLkTi=w1o8EF6-M7o8Qi9VpY-10m+MCR8U+K1_Aze=g@xxxxxxxxxxxxxx> <87eibm4xon.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <AANLkTikqHvSmr=WSZ3t8m3wKOGcUmQQ1v9Qx9MqGArS+@xxxxxxxxxxxxxx> <19651.15840.54770.942761@xxxxxxxxxxxxxxxxxx> <AANLkTikcgqA_cPLyMOXkgbu_PLkZRQ7qmch+LZdp_L6H@xxxxxxxxxxxxxx> <AANLkTi=RZ=qf5xqMQNZjZaikAdw12PzbzD3vo-hZfNHT@xxxxxxxxxxxxxx>
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Angelo McComis put forth on 10/23/2010 4:01 PM:
> Correction:
> 
> 
>> They quoted as having 10+TB databases running OLTP transactions on XFS,
>> with 4-5GB/sec sustained throughput to the disk system.  And 20-30TB for
>> data warehouse type
>>
> 
> They quoted having 10+TB databases running OLTP on EXT3 with 4-5GB/sec
> sustained throughput (not XFS).

Given the data rate above, this sounds like they're quoting a shared
nothing data model on a cluster, not a single host setup.  You are
interested in a single host setup, correct?

Did you ask for a contact at their customer's organization so you could
at least attempt to verify these performance claims?  Or did they state
these numbers are from an internal test system?  With no way for you to
verify these claims, they are, literally, worthless, as this vendor is
asking you to take their claims on faith.  Faith is for religion, not a
business transaction.

-- 
Stan

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