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Jeff Dean on Google Infrastructure
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6-17-2008 3:20 AM
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/0847a6c2-45b5-484e-82c7-4edeafd775f4/835FCF19-F6D1-4E47-BFD1-0F70F0F590A4/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://perspectives.mvdirona.com/2008/06/11/JeffDeanOnGoogleInfrastructure.aspx" href="http://perspectives.mvdirona.com/2008/06/11/JeffDeanOnGoogleInfrastructure.aspx" style="font-size: 11px;">perspectives.mvdirona.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://perspectives.mvdirona.com/2008/06/11/JeffDeanOnGoogleInfrastructure.aspx"><P class="MsoNormal"><FONT color="#000000" face="Calibri" size="3">More detail on the typical failures during the first year of a cluster from Jeff:</FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~0.5 overheating (power down most machines in <5 mins, ~1-2 days to recover)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~1 PDU failure (~500-1000 machines suddenly disappear, ~6 hours to come back)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~1 rack-move (plenty of warning, ~500-1000 machines powered down, ~6 hours)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~1 network rewiring (rolling ~5% of machines down over 2-day span)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~20 rack failures (40-80 machines instantly disappear, 1-6 hours to get back)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~5 racks go wonky (40-80 machines see 50% packetloss)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~8 network maintenances (4 might cause ~30-minute random connectivity losses)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~12 router reloads (takes out DNS and external vips for a couple minutes)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~3 router failures (have to immediately pull traffic for an hour)</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~dozens of minor 30-second blips for dns </FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~1000 individual machine failures</FONT></FONT></p> <P class="MsoListParagraph"><FONT color="#000000"><SPAN><SPAN><FONT size="3">·</FONT><SPAN> </SPAN></SPAN></SPAN><FONT face="Calibri" size="3">~thousands of hard drive failures</FONT></FONT></P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/835FCF19-F6D1-4E47-BFD1-0F70F0F590A4/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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