[rrd-developers] rrd cache work

[Tobias Oetiker]

Scott,

> Maybe it would be worth while to consider an approach where rrd_update
> calculates the rra values but caches them in application memory
> instead of immediately dirtying pages in the os filesystem cache.

> rrd_fetch were able to readout rra values from this same application
> cache it would go far in decoupling rrdtool from filesystem
> performance.

This would optimize the case where data was read frequently ...

I guess, that if you wanted to investigate this angle, the rrdcached
could probably be made to give data directly to fetch without
interfering with its 'write data to disk' tasks ...

cheers
tobi


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Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900