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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> Actually memory_buffered.rrd is there:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">[root@crdc-c210-141 ~]# ls -al /root/tools/rrdcached/10.74.125.141/memory/memory-buffered.rrd<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">-rw-r--r--. 1 root root 153688 Mar 6 09:09 /root/tools/rrdcached/10.74.125.141/memory/memory-buffered.rrd<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">When I try to access this file locally by the absolute path, it works:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">[root@crdc-c210-141 ~]# rrdtool fetch /root/tools/rrdcached/10.74.125.141/memory/memory-buffered.rrd AVERAGE --start 1362532000 --end 1362532140<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> value<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532020: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532040: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532060: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532080: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532100: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532120: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532140: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">1362532160: 3.6363878400e+08<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">But when I try to access this file remotely by the relative path, it doesn’t work:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">[root@crdc-c210-97 ~]# rrdtool fetch 10.74.125.141/memory/memory-buffered.rrd AVERAGE --start 1362532000 --end 1362532140 --daemon 10.74.125.141<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">ERROR: opening '10.74.125.141/memory/memory-buffered.rrd': No such file or directory<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I have checked all the path, there is no relative path. And I have changed –b before the listener as following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">rrdcached -w 600 -z 10 -p /root/tools/rrdcached/rrdcached.pid -b /root/tools/rrdcached -j /root/tools/rrdcached/cached -l 10.74.125.141 -l unix:/tmp/rrdcached.sock<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">All of these rrd files are created by collectd-rrdcached plugin and can updated by the rrdcached daemon.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">What’s the problem?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">B.R.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Benjamin Wang<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Steve Shipway [mailto:s.shipway@auckland.ac.nz]
<br>
<b>Sent:</b> 2013</span><span style="font-size:10.0pt;font-family:宋体">年</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">3</span><span style="font-size:10.0pt;font-family:宋体">月</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">6</span><span style="font-size:10.0pt;font-family:宋体">日</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
4:55<br>
<b>To:</b> Benjamin Wang (gendwang); rrd-users@lists.oetiker.ch<br>
<b>Subject:</b> RE: [rrd-users] Does rrdcached within rrdtool 1.4.7 support fetch, info etc?<o:p></o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D">Where is your RRD file?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D">Your rrdcached command line says it should be under /root/tools/rrdcached (this is the –b parameter, the base directory for the RRD files)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D">Your call to rrdtool is wrong – you don’t need to give the IP address in the RRD path unless you really have a directory called that! So…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">rrdtool info 10.74.125.141/memory/memory-buffered.rrd --daemon 10.74.125.141<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D">This tells rrdtool to talk to rrdcached via TCP (the
<b>–daemon 10.74.125.141</b> part)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D">It then requests a file ‘</span><span lang="EN-US">10.74.125.141/memory/memory-buffered.rrd’</span><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D">Since this doesn’t start with a /, the basedir is used, and rrdcached looks for
</span><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D">/root/tools/rrdcached/10</span><span lang="EN-US">.74.125.141/memory/memory-buffered.rrd</span><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D">This is probably not what you were trying to do. Make sure the
<b>–b basedir </b>is set correctly for rrdcached, and pass the relative path to rrdtool. Only specify the rrdcached address in the
<b>–daemon</b> parameter, or in the <b>RRDCACHED_ADDRESS</b> environment variable.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D">Having said all the, the stable release of rrdcached does not support all the functions. You need the trunk version to get such things as
<b>create</b> and <b>info</b>, at least you did last time I checked. I think the 1.4 stable version only supports
<b>graph</b>, <b>fetch</b>, <b>update</b>.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D">Steve<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
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<div class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US" style="font-size:11.0pt;color:#1F497D">
<hr size="2" width="100%" align="center">
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<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D">Steve Shipway<o:p></o:p></span></b></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-NZ" style="font-size:10.0pt;color:#1F497D">ITS Unix Services Design Lead<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-NZ" style="font-size:10.0pt;color:#1F497D">University of Auckland, New Zealand<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-NZ" style="font-size:10.0pt;color:#1F497D">Floor 1, 58 Symonds Street, Auckland<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><i><span lang="EN-NZ" style="font-size:10.0pt;color:#595959">Phone: +64 (0)9 3737599 ext 86487<o:p></o:p></span></i></p>
<p class="MsoNormal" align="left" style="text-align:left"><i><span lang="EN-NZ" style="font-size:10.0pt;color:#595959">DDI: +64 (0)9 924 6487<o:p></o:p></span></i></p>
<p class="MsoNormal" align="left" style="text-align:left"><i><span lang="EN-NZ" style="font-size:10.0pt;color:#595959">Mobile: +64 (0)21 753 189<o:p></o:p></span></i></p>
<p class="MsoNormal" align="left" style="text-align:left"><i><span lang="EN-NZ" style="font-size:10.0pt;color:#595959">Email:
<a href="mailto:s.shipway@auckland.ac.nz"><span style="color:#595959">s.shipway@auckland.ac.nz</span></a><o:p></o:p></span></i></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-GB" style="font-size:18.0pt;font-family:Webdings;color:green">P</span><span lang="EN-GB" style="font-size:11.0pt;color:blue">
</span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:green">Please consider the environment before printing this e-mail</span><span lang="EN-GB" style="font-size:11.0pt;color:blue"> :
</span><span lang="ZH-TW" style="font-size:10.0pt;font-family:"MS Gothic";color:green;mso-fareast-language:ZH-TW">打印本</span><span lang="ZH-TW" style="font-size:10.0pt;font-family:MingLiU;color:green;mso-fareast-language:ZH-TW">邮件，将减少一棵树存活的机会</span><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:navy"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-NZ" style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch">rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch</a> [<a href="mailto:rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch">mailto:rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch</a>]
<b>On Behalf Of </b>Benjamin Wang (gendwang)<br>
<b>Sent:</b> Wednesday, 6 March 2013 4:14 a.m.<br>
<b>To:</b> <a href="mailto:rrd-users@lists.oetiker.ch">rrd-users@lists.oetiker.ch</a><br>
<b>Subject:</b> [rrd-users] Does rrdcached within rrdtool 1.4.7 support fetch, info etc?<o:p></o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-NZ"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> I try to setup collectd and rrdcached in one machine, and try to access rrdcached in another machine. The start script is as following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">rrdcached -w 600 -z 10 -p /root/tools/rrdcached/rrdcached.pid -b /root/tools/rrdcached -j /root/tools/rrdcached/cached -l 10.74.125.141 -l unix:/tmp/rrdcached.sock<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When I access by rrdtool in the local machine with absolute path, everything is OK. But I try to access in the remote machine by the following commad:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">rrdtool info 10.74.125.141/memory/memory-buffered.rrd --daemon 10.74.125.141<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">rrdtool fetch 10.74.125.141/memory/memory-buffered.rrd AVERAGE --start 1362495020 --end 1362495620 --daemon 10.74.125.141<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The return result is always “ERROR: opening '10.74.125.141/memory/memory-buffered.rrd': No such file or directory”.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have checked the path. There is no symbolic link.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Does rrdtool 1.4.7 support remotely fetch, info?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">B.R.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Benjamin Wang<o:p></o:p></span></p>
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