<div dir="ltr">Hello Aleksandr,<div><br></div><div>Thank you for your efforts and sharing this.</div><div><br></div><div>Looking closer to figures, I can assume that lightweight session won't help us a lot, but will introduce additional complexity.<br><br></div><div>So, I'm marking the BP as Obsolete.<br><br>Ilya Sviridov<br>isviridov @ FreeNode</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 29, 2014 at 1:21 PM, Aleksandr Chudnovets <span dir="ltr"><<a href="mailto:achudnovets@mirantis.com" target="_blank">achudnovets@mirantis.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Hello team,</span></p><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">As it was discussed on IRC meeting yesterday I’m glad to share the results of my testing of performance impact of PKI token validation.</span></p><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">My research is connected with bp [1] about adding lightweight session to mdb for improvement overall performance.</span></p><br><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">For my tests</span></span><span style="background-color:transparent;color:rgb(0,0,0);font-family:Arial;font-size:15px;white-space:pre-wrap;line-height:1.15"> I used PKI tokens with and without service catalog.</span><span><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">(Actually, PKI tokens is only option for MagnetoDB, because MagnetoDB</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">was designed to handle huge amount of requests per second.)</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Here is my results:</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"> - for lightweight requests, like list_tables, we can get 5% - 8% performance </span><span style="background-color:transparent;color:rgb(0,0,0);font-family:Arial;font-size:15px;white-space:pre-wrap;line-height:1.15">boost using tokens without service catalog;</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"> - for big and slow requests, like batch_write, performance boost is smaller.</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"> - disabling keystone support in api-paste gives us 20% performance </span><span style="background-color:transparent;color:rgb(0,0,0);font-family:Arial;font-size:15px;white-space:pre-wrap;line-height:1.15">boost for PKI tokens :)</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">So it can be good practice for MagnetoDB clients to use PKI tokens without</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">service catalog.</span></p><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Another conclusion I can made, the PKI token validation works fast enough and adding additional session mechanism won’t give big performance boost.</span></p><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Please share your views.</span></p><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">[1] </span><a href="https://blueprints.launchpad.net/magnetodb/+spec/light-weight-session" style="text-decoration:none" target="_blank"><span style="font-size:15px;font-family:Arial;background-color:transparent;text-decoration:underline;vertical-align:baseline;white-space:pre-wrap">https://blueprints.launchpad.net/magnetodb/+spec/light-weight-session</span></a></p><br><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Thanks,</span></p><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Aleksandr Chudnovets</span></p></span>
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