On Dec 15, 2009, at 4:46 PM, Mike Schrag wrote:

>>> My only doubt for a database server would be if the workload implied a lot 
>>> of *sustained* writes. Thats a point where SSDs just don't cut it.
>> And not just that. Intel SSDs, for instance, start to get very very slow at 
>> some point, due to the way the data is being organized, shuffled, stored, 
>> etc, inside the drive to avoid hitting the same cells over and over. The 
>> only way to fix it is to perform a low level format.
> I'm running into this on my Intel ... I had AMAZING performance 
> out-of-the-box. Read still seems very fast (for instance, I can reboot and be 
> logged back in within a couple of seconds), but write performance is starting 
> to suck.
> 

That's by design; they have to find a way to sell you a *faster* drive in the 
not so distant future :-)

The real reason of course is the lack of TRIM on the Mac OS:

http://en.wikipedia.org/wiki/TRIM_(SSD_command)

If any body knows about a utility that can TRIM an HFS+ volume, I'm all ears !

HG




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