Re: Multiple storeio types?

From: Joe Cooper <joe@dont-contact.us>
Date: Fri, 09 Nov 2001 11:15:27 -0600

Ah. Right as always, Henrik.

In that case, I won't feel at all guilty about using the RAM disk as my
'memory cache'. We'll see how it does on a big benchmark by sometime
tonight.

Thanks for your thoughts.

Henrik Nordstrom wrote:

> There is one big difference. The ram disk is more persistent.
>
> The problem with the "memory cache" is that a single request can flush all of
> it given the right conditions.
>
> Regards
> Henrik
>
> On Friday 09 November 2001 16.21, Joe Cooper wrote:
>
>
>>The ram disk also can't bring things in from the disk dirs to make them
>>'hot' again, which I think is what's really missing from the current
>>memory model...so it's doubtful their is any benefit for this reason.
>>They both use a replacement policy to decide what gets dropped--and if
>>the pool is the same size for each, then the effect should be the same.
>> (But if the OS freaks out on a 500+MB process, then obviously the ram
>>disk wins.) But I think both have the same flaws as a memory caching
>>model. Correct me if I'm wrong?

-- 
Joe Cooper <joe@swelltech.com>
http://www.swelltech.com
Web Caching Appliances and Support
Received on Fri Nov 09 2001 - 10:12:06 MST

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