[rrd-developers] [PATCH] rrd_open and rrdcached

[Tobias Oetiker]

Kevin ?

cheers
tobi


Today Daniel.Pocock at barclayscapital.com wrote:

>
>
> rrdcached makes some calls to access and stat, which don't work for my
> virtual filesystem abstraction.
>
> This patch:
>
> - provides implementations of rrd_stat and rrd_access, invoking the C
> library methods by default
> - modify rrdcached to use the rrd_open API for these methods
> - update Makefile.am so that rrdcached links with the rrd_open API
>
> I'm not sure whether rrdcached is meant to link with rrd_open.  The
> alternative: update the rrdtool C API to include some higher level
> functions that can be called from rrdcached and other RRD-based apps.
> This may even mean that some of the logic from rrdcached has to be moved
> into such functions.
>
> I'm also coming up against similar issues with Ganglia - gmetad wants to
> know if the RRD files already exist on disk, even though they only exist
> in my virtual back-end.  To deal with that, I'm thinking of adding some
> methods to the RRD API so that applications can do things like browsing
> the directory of RRDs.
>
> Regards,
>
> Daniel
>
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Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
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