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From Geoff Howard <coc...@leverageweb.com>
Subject Re: [RT] rethinking the cache storage system
Date Sun, 29 Feb 2004 19:25:25 GMT
Pier Fumagalli wrote:

> On 23 Feb 2004, at 15:47, Stefano Mazzocchi wrote:
>
>>
>> My gut feelins is that having such a critical piece of our 
>> infrastructure so away from the metal is actually hurting us, both 
>> performance and complexity wise.
>
>
> +1
>
>> I would love to use BerkeleyDB, but it's native, incompatibly 
>> licensed and has terrible Java APIs. And all the problems of binary 
>> stores: you can't see inside from your shell!
>
>
> It's all right...
>
>> I think that a better use of the file system would yield much more 
>> performance, since JVM IO is pretty much optimized for file access 
>> anyway (and uses OS-level caching).
>>
>> thoughts?
>
>
> I've been looking at the java.nio stuff, especially in the area of 
> memory mapping some files :-P I can tell you that it's FAST, and 
> basically does the trick. See a file as a big array in ram, well, but 
> actually it's only a "fake" array mapped really on the disk, and 
> cached by kernel...


I've been thinking of that myself -- do I remember correctly that we've 
tossed around the idea of making 2.2 jdk1.4 only??

Geoff

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