<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";
mso-fareast-language:EN-ZA;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:25760901;
mso-list-type:hybrid;
mso-list-template-ids:1788102574 470351889 470351897 470351899 470351887 470351897 470351899 470351887 470351897 470351899;}
@list l0:level1
{mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style></head><body lang="EN-ZA" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Sorry guys, I was actually asking for a more sipwise components answer</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I realise with high IO load, things will timeout, but I would assume that the components of SPCE have a method for dealing with this:</span></p>
<p class="MsoListParagraph" style><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><span style>1)<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Stop new registrations (without banning unless the frequency is too high - a legitimate ban that may have been the cause of highio)</span></p>
<p class="MsoListParagraph" style><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><span style>2)<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Honour existing registrations</span></p>
<p class="MsoListParagraph" style><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><span style>3)<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Prioritise call tear downs</span></p>
<p class="MsoListParagraph" style><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><span style>4)<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Because the thread happens synchronously for call tearups, and these will be timing out, reply with a 503 or similar code before the final timeout if unable to log data fast enough. Then log the timeout in waitable / (and discardable if necessary) thread? </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">“Crashing” is not really an option for a SIP server, current calls should be more important than new calls etc. Current registrations and re-registrations more important than new ones and so forth.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt"><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><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""> Jeremie Chism [mailto:<a href="mailto:jchism2@gmail.com">jchism2@gmail.com</a>] <br>
<b>Sent:</b> 28 May 2013 02:54 PM<br><b>To:</b> Kevin Masse<br><b>Cc:</b> Matthew Ogden; Martin Wong; <a href="mailto:spce-user@lists.sipwise.com">spce-user@lists.sipwise.com</a><br><b>Subject:</b> Re: [Spce-user] kamailio-proxy.log error - mysql lost connection</span></p>
</div></div><p class="MsoNormal"> </p><p class="MsoNormal">What you will see is the load rise then registrations drop and users that are authorized on the system get banned. Ultimately you will end up with a drive that is unreadable. This has stopped with sas drives. <br>
<br>On Tuesday, May 28, 2013, Kevin Masse wrote:</p><div><div><p class="MsoNormal">Hello, it crashes because the hard drive fails. Basically it chews up hard drives in high volume installations without SAS drives at 15k rpm.</p>
</div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">This has happened to a few of us in the list the very same way.</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Kevin</p></div><div>
<p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><i><span style="color:#333333">Sent from my Verizon Wireless 4G LTE DROID</span></i></p>
</div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br><br>Matthew Ogden <<a href="mailto:matthew@tenacit.net">matthew@tenacit.net</a>> wrote:</p><div><p><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Why does sipwise crash though if its waiting for IO? Surely the call tearup and teardown should just take longer to initiate?</span></p>
<p><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><div style="border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt"><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p><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:spce-user-bounces@lists.sipwise.com">spce-user-bounces@lists.sipwise.com</a> [<a href="mailto:spce-user-bounces@lists.sipwise.com">mailto:spce-user-bounces@lists.sipwise.com</a>] <b>On Behalf Of </b>Kevin Masse<br>
<b>Sent:</b> 28 May 2013 01:21 PM<br><b>To:</b> Martin Wong; Jeremie Chism<br><b>Cc:</b> <Unnamed><br><b>Subject:</b> Re: [Spce-user] kamailio-proxy.log error - mysql lost connection</span></p></div></div><p> </p><p>
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Good morning, SSD’s would not work well in this environment. SSD’s are fast but the number of rewrites IO’s and other issues do not make it a fit. The burnout rate on the SSD’s is much higher than even the SATA. The true answer here is SAS drives at 15K RPM. They have the longevity and the speed to avoid issues.</span></p>
<p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">As mentioned earlier with Jeremie, we have learned the hard way about hardware choices. </span></p>
<p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Your best choice for configuration would be, SAS drives, in RAID5 with 1 hot spare/swap and 16GB ram or better. </span></p>
<p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I hope this helps.</span></p>
<p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Kevin</span></p>
<p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p><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:spce-user-bounces@lists.sipwise.com">spce-user-bounces@lists.sipwise.com</a> [<a href="mailto:spce-user-bounces@lists.sipwise.com">mailto:spce-user-bounces@lists.sipwise.com</a>] <b>On Behalf Of </b>Martin Wong<br>
<b>Sent:</b> Monday, May 27, 2013 11:20 PM<br><b>To:</b> Jeremie Chism<br><b>Cc:</b> <Unnamed><br><b>Subject:</b> Re: [Spce-user] kamailio-proxy.log error - mysql lost connection</span></p></div><p><span lang="EN-US"> </span></p>
<div><p><span lang="EN-US">Hi guys,</span></p><div><p><span lang="EN-US"> </span></p></div><div><p><span lang="EN-US">do you think SSD would cut it here? I would like your views on the write speeds for SSD vs SAS 15K</span></p>
</div><div><p><span lang="EN-US"> </span></p></div><div><p style="margin-bottom:12.0pt"><span lang="EN-US">Thanks</span></p><div><p><span lang="EN-US">On Tue, M</span></p></div></div></div></div></div><p class="MsoNormal">
<br><br>-- <br>Jeremie Chism<br>Triton Communications</p></div></div></body></html>