<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">I also found running on an external USB connected hard disk delivered much better I/O performance than running on the SD card. <div><br></div><div>Andy, G4PIQ<br><br><div id="AppleMailSignature" dir="ltr">Sent from my iPhone</div><div dir="ltr"><br>On 7 Mar 2019, at 13:44, gu6efb--- via Dxspider-support <<a href="mailto:dxspider-support@tobit.co.uk">dxspider-support@tobit.co.uk</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The most likely reason is that the memory card holding the OS has worn out as it is only good for a limited amount of read/write cycles. DXspider puts a high read/write load on the card<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I had the same issue here with odd unexplainable cluster failures and it was all down to the card.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I now use a hard disk connected to the PI which has solved my issues .<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">73 Keith GU6EFB<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><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""> Dxspider-support [<a href="mailto:dxspider-support-bounces@tobit.co.uk">mailto:dxspider-support-bounces@tobit.co.uk</a>] <b>On Behalf Of </b>Andy Scott via Dxspider-support<br><b>Sent:</b> 07 March 2019 11:36<br><b>To:</b> <a href="mailto:dxspider-support@tobit.co.uk">dxspider-support@tobit.co.uk</a><br><b>Cc:</b> Andy Scott<br><b>Subject:</b> [Dxspider-support] 1. Cluster started hanging several times a day. (David Spoelstra)<o:p></o:p></span></p><p class="MsoNormal"><o:p> </o:p></p><div><div><div><p class="MsoNormal">I cannot offer any conclusive feedback, but I have found, on raspberry pi, that a<o:p></o:p></p></div><div><p class="MsoNormal">symptom of failure on my Pi is that the cluster service fails to communicate with clients on the user port. I have set a cron task to see if a login: prompt is received when telneting into the user port (note that you cannot rely on a telnet timeout, as communication with the port still works fine). If it times out waiting for the login prompt, I kill the dxcluster process and restart the service - the cron script runs one minute before the normal dxspider cron to reconnect to the upstream server.<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">In doing so, I haven't needed to reboot the server, although this may still be needed from time to time if a different symptom presents.<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">The cron script is as follows, in case it helps anyone (the /var/tmp folder should exist and be writeable):<br><br>#!/bin/bash<br>#<br># First, capture the process ID for the dxspider server<br>#<br>PID=`pgrep <a href="http://cluster.pl">cluster.pl</a>` ;<br>#<br># Test that we get a login prompt - not just that the telnet port is open<br># We're going to send a login of _quit_ which will cause the cluster<br># to reject the login and close the session after writing a trace to<br># a temporary file that we can test later, checking its file length<br>#<br>echo "quit" | nc -w 2 [your server address] 7300 &> /var/tmp/dxtest<br>grep -i "login" /var/tmp/dxtest<br>test=$(cat < /var/tmp/dxtest) || exit # exit if the file doesn't exist<br>#<br># If the tested file length is long enough to include "login" then all is working<br>#<br>if [ "${#test}" -lt 5 ]<br> then<br> # echo "The DXCluster has falledn over..."<br> kill -9 $PID ;<br> sleep 3<br> # echo 'reset by checkcluster.sh' | system-cat -t DXCluster -p warning ;<br> /etc/rc.d/rc.spider<br> sleep 1<br> logger "DXCluster reset -p warning"<br>fi<br>exit<o:p></o:p></p></div><div><p class="MsoNormal"># The End<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div></div></div></div></div></blockquote><blockquote type="cite"><div dir="ltr"><span>_______________________________________________</span><br><span>Dxspider-support mailing list</span><br><span><a href="mailto:Dxspider-support@tobit.co.uk">Dxspider-support@tobit.co.uk</a></span><br><span><a href="https://mailman.tobit.co.uk/mailman/listinfo/dxspider-support">https://mailman.tobit.co.uk/mailman/listinfo/dxspider-support</a></span><br></div></blockquote></div></body></html>