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</o:shapelayout></xml><![endif]--></head><body lang=ES link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>Is it a Master-Master Replication Type?</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>In replication mode, pgpool-II acts as a middleware intercepting all queries and send those queries to postgresql servers. The postgresql servers runs individually. There is no connections between then, for that reason a direct change in one node is not propagated to other nodes, and this is not a master-master replication. Replication mode works like synchronous replication. (All nodes needs to confirm the request to pgpool, if the request fails on one node the query could by rolledback)</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>Are there Primary and Standby or not?</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>All nodes are primary nodes.</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>If a postgres server goes down and then restarts, is there an automatic way to update the data?</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>Is one node goes down pgpool-II detach that nodes and triggers failover command. Later is necessary an online recovery by pgpool.</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>4.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>Is there a failover and recovery procedure?</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>You can configure failover_commands and recovery_commands in pgpool-II.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'>I think master-slave mode with postgresql replication (streaming replication) is the best choice.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Arial","sans-serif";color:#212121'> Regards.</span><span lang=EN-US style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>De:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> pgpool-general-bounces@pgpool.net [mailto:pgpool-general-bounces@pgpool.net] <b>En nombre de </b>Giancarlo Celli<br><b>Enviado el:</b> viernes, 8 de septiembre de 2017 05:15 a. m.<br><b>Para:</b> pgpool-general@pgpool.net<br><b>Asunto:</b> [pgpool-general: 5717] Questions about Replication mode<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><a name="m_2969943214555106859__olk_signature"><span style='font-family:"Arial","sans-serif";color:#212121'>Hi to All,</span></a><span style='font-size:9.5pt'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:9.5pt'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif";color:#212121'>I am beginner on pgpool.</span><span style='font-size:9.5pt'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif";color:#212121'>I want to understand the difference between master-slave and pgpool replication mode.</span><span style='font-size:9.5pt'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif";color:#212121'>Now, I have implemented a postgresql streaming replication, so I'm using master-slave mode on pgpool-II.</span><span style='font-size:9.5pt'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif";color:#212121'>However, I would like to understand the characteristics of internal replication at pgpool:</span><span style='font-size:9.5pt'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-family:"Arial","sans-serif";color:#212121'>Is it a Master-Master Replication Type?</span><span style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-family:"Arial","sans-serif";color:#212121'>Are there Primary and Standby or not?</span><span style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-family:"Arial","sans-serif";color:#212121'>If a postgres server goes down and then restarts, is there an automatic way to update the data?</span><span style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:9.5pt;color:#212121'><span style='mso-list:Ignore'>4.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-family:"Arial","sans-serif";color:#212121'>Is there a failover and recovery procedure?</span><span style='font-size:9.5pt;color:#212121'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif";color:#212121'>Thanks to all</span><span style='font-size:9.5pt'>.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif";color:#212121'>Best regards.</span><span style='font-size:9.5pt'><o:p></o:p></span></p></div></div></body></html>