[rrd-developers] [PATCH] extend rrd_open API to help select best initial rra row

[Daniel.Pocock at barclayscapital.com]

As already discussed on the list, this moves selection of the initial
RRA row into the rrd_open.c API

The current implementation (random row) is used by default.  However, it
now provides an opportunity for alternative implementations to integrate
with rrdtool in a single place.

Maybe there are other places in rrdtool where I should insert calls to
the function rrd_notify_row()?

This has been tested with rrdtool create and rrdtool info to verify that
random rows are selected by default (existing behaviour preserved).

Regards,

Daniel

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