[rrd-users] Re: rrd question

[Vinkesteijn, Gertjan]

It seems that our compiling system on Silicon Graphics is somewhat bizar.
fwrite() does not work when the filedescriptor seeked back, bad fileno.
I made the following kludge, not nice I know, but it works in rrd_update.c:


#ifndef GERTJAN
offs=ftell(rrd_file);
fclose(rrd_file);
if ((rrd_file=fopen(argv[optind], "r+")) == NULL)
{       fprintf(stderr, "error: unable to open file %s\n", argv[optind]);
        return -1;
}
if (fseek(rrd_file, offs, SEEK_SET) != 0)
{       fprintf(stderr, "error: unable to fseek to offset %ld\n", offs);
        return -1;
}
#endif
 
if(fwrite(&(rrd.cdp_prep[iii].scratch[CDP_val].u_val),
                                        sizeof(rrd_value_t),1,rrd_file) !=
1){
                                rrd_set_error("writing rrd");
                                break;
                            }
                            rra_current += sizeof(rrd_value_t);
                            wrote_to_file = 1;

> -----Original Message-----
> From:	Tobias Oetiker [SMTP:oetiker at ee.ethz.ch]
> Sent:	Monday, November 08, 1999 6:50 PM
> To:	Vinkesteijn, Gertjan
> Cc:	RRD User Mailing List
> Subject:	[rrd-users] Re: rrd question
> 
> Today you sent me mail regarding rrd question:
> 
> *> Dear friends,
> *> 
> *> I have the follwing problem, we got the error message:
> *> 	ERROR: writing rrd
> *> when the rrd database is filled up
> *> it will not accept any input no more
> *> 
> *> I created the database as follows:
> *> 	rrdtool create test.rrd --step 300 \
> *> 	DS:testf:GAUGE:1200:U:U \
> *> 	RRA:AVERAGE:0.5:1:12
> *> I enter with the update command, every 5 minutes a value, but after one
> hour
> *> it is over and out
> *> 
> *> can anybody help me in telling me what I do wrong?
> 
> could it be that you don't have write permission to the rrd? RRDs do NOT
> fill up ...
> 
> cheers
> tobi
> *> 
> *> ________
> *> Gertjan Vinkesteijn
> Interedge
> *> mailto:g.j.vinkesteijn at interedge.nl		Printerweg 48
> *> tel:	033 4509957						3821
> AD
> *> Amersfoort
> *> 
> *> 
> 
> -- 
>  ______    __   _
> /_  __/_  / /  (_) Oetiker, Timelord & SysMgr @ EE-Dept ETH-Zurich
>  / // _ \/ _ \/ / TEL: +41(0)1-6325286  FAX:...1517  ICQ: 10419518 
> /_/ \.__/_.__/_/ oetiker at ee.ethz.ch http://ee-staff.ethz.ch/~oetiker
> 
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