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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal">We are testing the RRDCached plugin but are seeing a number of errors in syslog from collectd servers:<o:p></o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">rrdcached[14880]: queue_thread_main: rrd_update_r (/var/lib/rrdcached/db/collectd/xxxxxxxxx/disk-dm-0/disk_time.rrd) failed with status -1. (/var/lib/rrdcached/db/collectd/xxxxxxxxxxx/disk-dm-0/disk_time.rrd: illegal
attempt to update using time 1367363996 when last update time is 1367364056 (minimum one second step))<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">collectd[32487]: uc_update: Value too old: name = xxxxxxxxxxx/cpu-3/cpu-user; value time = 1367364236.000; last cache update = 1367364236.000;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/collectd/xxxxxxxxxxx/df/df-root.rrd, [1367364236:98146201600.000000:1892331495424.000000], 1) failed with status -1.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The RRDCached plugin configurations is as follows: <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><Plugin rrdcached><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> DaemonAddress "unix:/var/run/rrdcached.sock"
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> DataDir "/var/lib/rrdcached/db/collectd"<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> CollectStatistics true<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"></Plugin><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><Plugin rrdtool><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> DataDir "/var/lib/rrdcached/db/collectd"<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> CacheTimeout 60<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> CacheFlush 3600<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> WritesPerSecond 1800<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> RandomTimeout 30<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"></Plugin><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We do see that the RRD files (at least some or most of them) are being updated (with new timestamps).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The rrdcached process seems to have 6 threads:<o:p></o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal">25379 root 20 0 148m 1236 464 S 0 0.0 0:00.11 rrdcached<o:p></o:p></p>
<p class="MsoNormal">25380 root 20 0 148m 1236 464 S 0 0.0 0:00.00 rrdcached<o:p></o:p></p>
<p class="MsoNormal">25381 root 20 0 148m 1236 464 S 0 0.0 0:00.00 rrdcached<o:p></o:p></p>
<p class="MsoNormal">25382 root 20 0 148m 1236 464 S 0 0.0 0:00.00 rrdcached<o:p></o:p></p>
<p class="MsoNormal">25383 root 20 0 148m 1236 464 S 0 0.0 0:00.00 rrdcached<o:p></o:p></p>
<p class="MsoNormal">25384 root 20 0 148m 1236 464 S 0 0.0 0:00.00 rrdcached<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any suggestions on what we did wrong?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks.<o:p></o:p></p>
<p class="MsoNormal">Yuantai<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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