Hi there,
since I'm suspicious about some delays in between our master-master replication I'd like to ask you if it's possible to use deltasyncrepl with mirror node configuration? Our setup is two master in active passive mode behind an loadbalancer and several slaves. The deltasyncrepl works fine there. We only have sometimes problems with the active master to passive master replication. Especially when we have a lot of changes. The version is 2.4.50 running on debian 10. Thanks!
Andreas
--On Wednesday, September 9, 2020 5:12 PM +0200 Andreas Juretzka a.juretzka@heinlein-support.de wrote:
Hi there,
since I'm suspicious about some delays in between our master-master replication I'd like to ask you if it's possible to use deltasyncrepl with mirror node configuration?
Yes, we have customers around the globe with DBs up to 50 million+ active users with 4-way multi-provider delta-syncrepl configurations.
Regards, Quanah
--
Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: http://www.symas.com
Andreas Juretzka a.juretzka@heinlein-support.de schrieb am 09.09.2020 um
16:12 in Nachricht e39de7c9-2d00-031e-b8d4-e3e43e17bc88@heinlein-support.de:
Hi there,
since I'm suspicious about some delays in between our master-master replication I'd like to ask you if it's possible to use deltasyncrepl with mirror node configuration? Our setup is two master in active passive mode behind an loadbalancer and several slaves. The deltasyncrepl works fine there. We only have sometimes problems with the active master to passive master replication. Especially when we have a lot of changes. The version is 2.4.50 running on debian 10.
Hi!
Obviously you should give some details: Two masters? How many slaves? What is "a lot" of changes? And how long are "some delays"?
Regards, Ulrich
Thanks!
Andreas
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--On Thursday, September 10, 2020 9:43 AM +0200 Ulrich Windl Ulrich.Windl@rz.uni-regensburg.de wrote:
Obviously you should give some details: Two masters? How many slaves? What is "a lot" of changes? And how long are "some delays"?
I would agree here, there's a significant lack of useful information. What log level is set? You essentially have to run at "stats sync" to be able to understand what's happening at the replication level. There are many different things that could be occurring (for example, the servers weren't loaded initially in the correct fashion for MMR, causing writes to trigger fallback REFRESHes, etc, and generally destroying the integrity of the system).
Also, without any configuration information, it's impossible to know if your environment is even configured correctly at the ground level.
Regards, Quanah
--
Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: http://www.symas.com
Hi,
and thanks for your fast response. Actually you answered my question already with your first reply that it's possible to configure the replication in this way. So far I've the idea this will fix my problems. Otherwise I'd like to come back, of course with the necessary information :-)
Regards, Andreas
Am 10.09.20 um 17:15 schrieb Quanah Gibson-Mount:
--On Thursday, September 10, 2020 9:43 AM +0200 Ulrich Windl Ulrich.Windl@rz.uni-regensburg.de wrote:
Obviously you should give some details: Two masters? How many slaves? What is "a lot" of changes? And how long are "some delays"?
I would agree here, there's a significant lack of useful information. What log level is set? You essentially have to run at "stats sync" to be able to understand what's happening at the replication level. There are many different things that could be occurring (for example, the servers weren't loaded initially in the correct fashion for MMR, causing writes to trigger fallback REFRESHes, etc, and generally destroying the integrity of the system).
Also, without any configuration information, it's impossible to know if your environment is even configured correctly at the ground level.
Regards, Quanah
--
Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: http://www.symas.com
openldap-technical@openldap.org
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Andreas Juretzka -
Quanah Gibson-Mount -
Ulrich Windl