[rrd-developers] Re: Exiting of programs during an rrd_update

[Tobi Oetiker]

Today you sent me mail regarding Exiting of programs during an rrd_update:

*> I have one more thing that I'd like thought about before the
*> final release of RRDtool.
*> 
*> What happens to an RRD file if the program running rrd_update
*> is control-c during an rrd_update.  Can the file be corrupted
*> or screwed up in any way?  If so, I'd like to see rrd_update
*> potentially open writing to a temporary file, create the
*> file, close the file, and then do a rename to the final
*> name.  In this way if anything goes wrong before the
*> rename, no data is lost or screwed up.

Hi Blair,

the tmp file aprocah is not a solution at this would defeat the whole point
of round robin archives where the file is EDITED insted of rewritten ... 

We could put a signal handler in there which made rrd_update and rrd_create
ignore all signals when it executes the fwrites ... 

cheers
tobi


*> 
*> Comments,
*> Blair

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