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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I always thought it retried for another IP after a timeout, though I haven’t test it.<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'>-Tony<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>---------------------------<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>Manager, IT Operations<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>Format Dynamics, Inc.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>P: 303-228-7327<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>F: 303-228-7305<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'><a href="mailto:abiacco@formatdynamics.com">abiacco@formatdynamics.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'><a href="http://www.formatdynamics.com/">http://www.formatdynamics.com</a><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><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> José Celano [mailto:jcelano@iqingenieros.com] <br><b>Sent:</b> Monday, May 23, 2011 11:40 AM<br><b>To:</b> Anthony J. Biacco<br><b>Cc:</b> Joshua Baker-LePain; gluster-users@gluster.org<br><b>Subject:</b> Re: [Gluster-users] Scaling Gluster<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>I have though about this, It is the solution scalr offers, but the problem remains the same.<br>What happen if the host which the dns mapped to is down?<br>This solution solves load balancing but no high availability.<o:p></o:p></p><div><p class=MsoNormal>On Mon, May 23, 2011 at 6:29 PM, Anthony J. Biacco <<a href="mailto:abiacco@formatdynamics.com">abiacco@formatdynamics.com</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;color:#1F497D'>Make a DNS round-robin host entry that points to both IP addresses, then use that hostname in the mount command</span><o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;color:#1F497D'>-Tony</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>---------------------------</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>Manager, IT Operations</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>Format Dynamics, Inc.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>P: <a href="tel:303-228-7327" target="_blank">303-228-7327</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>F: <a href="tel:303-228-7305" target="_blank">303-228-7305</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'><a href="mailto:abiacco@formatdynamics.com" target="_blank">abiacco@formatdynamics.com</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'><a href="http://www.formatdynamics.com/" target="_blank">http://www.formatdynamics.com</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p></div><div style='border:none;border-left:solid windowtext 1.5pt;padding:0in 0in 0in 4.0pt;border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color blue'><div><div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;border-color:-moz-use-text-color -moz-use-text-color'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt'>From:</span></b><span style='font-size:10.0pt'> José Celano [mailto:<a href="mailto:jcelano@iqingenieros.com" target="_blank">jcelano@iqingenieros.com</a>] <br><b>Sent:</b> Monday, May 23, 2011 11:06 AM<br><b>To:</b> Anthony J. Biacco<br><b>Cc:</b> Joshua Baker-LePain; <a href="mailto:gluster-users@gluster.org" target="_blank">gluster-users@gluster.org</a><o:p></o:p></span></p><div><div><p class=MsoNormal><span style='font-size:10.0pt'><br><b>Subject:</b> Re: [Gluster-users] Scaling Gluster<o:p></o:p></span></p></div></div></div></div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'>Hi Tony:<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Mon, May 23, 2011 at 4:55 PM, Anthony J. Biacco <<a href="mailto:abiacco@formatdynamics.com" target="_blank">abiacco@formatdynamics.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I think i read somewhere the server in the mount string is only used to retrieve the cluster config. So as long as that server is up at time of mount, you're fine.<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br>Yes, It is in the offcial documentation.<br>I am trying to avoid that. My final objetive is high availability.<br> <o:p></o:p></p></div><blockquote style='border:none;border-left:solid windowtext 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color rgb(204, 204, 204)'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>If the server goes down after mount, it doesnt matter as the cluster config on the mounting servers knows about all gluster servers.<o:p></o:p></p></blockquote><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br>Yes, there is no problem after mounting becasuse I use replication. The problem is in new mountig processes<br>after the seleted "master gluster server" crashes.<br> <o:p></o:p></p></div><blockquote style='border:none;border-left:solid windowtext 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color rgb(204, 204, 204)'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Somebody correct me if i'm wrong.<br>Personally, i copy the cluster config to all my mounting servers and use that file in the mount command instead of a gluster server hostname.<o:p></o:p></p></blockquote><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><br>Yes. That is ok, but I am finding an automatic way in case I make an auto-scalable Gluster deployment.<br>If something change in Gluster like the number of servers (I could add more servers later) then I would have<br>to copy the new volumen info to my Apache Rol Amazon Image, and this can not be done automatically.<br>Other way could be doing a script to load that file from S3 but I would have to copy the new volume info file<br>to S3 every time It changes, and I don´t know how this can be done because I don´t know how monitoring<br>and catch Gluster volumes changes.<o:p></o:p></p></div><blockquote style='border:none;border-left:solid windowtext 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color rgb(204, 204, 204)'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br>-Tony<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><br><br><br><br>-----Original Message-----<br>From: Joshua Baker-LePain <<a href="mailto:jlb17@duke.edu" target="_blank">jlb17@duke.edu</a>><br>Sent: May 23, 2011 9:16 AM<br>To: José Celano <<a href="mailto:jcelano@iqingenieros.com" target="_blank">jcelano@iqingenieros.com</a>><br>Cc: <a href="mailto:gluster-users@gluster.org" target="_blank">gluster-users@gluster.org</a> <<a href="mailto:gluster-users@gluster.org" target="_blank">gluster-users@gluster.org</a>><br>Subject: Re: [Gluster-users] Scaling Gluster<br><br>On Thu, 19 May 2011 at 12:40am, José Celano wrote<br><br>> I have 2 replicated servers and several Apache servers that mount the same<br>> volume.<br>> When I mount a Gluster Volumen from one of the Apache servers<br>><br>> mount.glusterfs<br>> ip-XX-XXX-XXX-XXX.eu-west-1.compute.internal:/dab578f4-06fa-4584-ac1d-c6ef14e6d0cf<br>> /mnt/glusterfs<br>> how could I obtain high availability if that server die?<br><br>Use ucarp to share a virtual IP address between the Gluster servers, and<br>mount using that IP address.<br><br>--<br>Joshua Baker-LePain<br>QB3 Shared Cluster Sysadmin<br>UCSF<o:p></o:p></p></div></div></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>