Re: XFS Preallocation

[Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>]

Peter Vajgel put forth on 2/1/2011 1:20 PM:

> At the scale we operate it does. We have multiple variables so the number of 
> combinations is large. We have hit every single possible hardware and 
> software problem and problem resolution can take months if it takes days to 
> reproduce the problem. Hardware vendors (disk, controller, motherboard 
> manufacturers) are much more responsive when you can reproduce a problem on 
> the fly in seconds (especially in comparative benchmarking). The tests 
> usually run only couple of minutes. With 12x3TB (possibly multiplied by a 
> factor of X with our new platform) it would be unacceptable to wait for 
> writes to finish.

Hi Peter,

When you mention scale, you're referring to the storage back end at
facebook.com, your employer, correct?

-- 
Stan