[rrd-developers] [PATCH] RRDCacheD: Add the "FETCH" command.

Tobias Oetiker tobi at oetiker.ch
Mon Mar 29 19:04:24 CEST 2010

Hi Florian,

Feb 24 Florian Forster wrote:

> From: Florian Forster <octo at noris.net>
> Add a "FETCH" command to RRDCacheD which behaves like a (simplified
> version of) rrdfetch(1).
> This has advantages over calling "FLUSH" from within the "client",
> especially if the daemon is accessed using a network socket. For one, it
> makes it easy to separate collecting and storing of data on one side and
> creating graphs on another, possibly more public server. Without this
> command this is only possible using networked file systems and similar
> techniques.
> When talking to an instance of RRDCacheD via a network socket, only
> relative pathnames are allowed. If the RRD file is to be accessed
> afterwards (why else would one call "FLUSH"?), the client has to be in a
> specific directory so the *same* relative path can be used. If the file
> is on a share mounted via the network, the required CWD may differ from
> the CWD of the server, making developing and deploying solutions using
> separated storing and graphing unnecessarily hard.
> The data can be accessed using "rrdc_fetch" which should be a drop-in
> replacement for "rrd_fetch_r". This makes it easy for programs using the
> RRDtool C API to use this new functionality.

thanks ... added to trunk


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

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