Hi, to my understanding the admin guide on mirrormode is misleading. http://www.openldap.org/doc/admin24/replication.html#MirrorMode According to this documentation both nodes have to be put into mirror mode, as far as I understand the concept of mirror mode, and is described in slapd.conf(5), there is one node accepting write operations, that is 'mirrormode on' statement, the other node acts as synrepl consumer and a hot standby only, with 'mirrormode off'. Could someone please correct me, if I'm wrong.
-Dieter
Dieter Kluenter wrote:
Hi, to my understanding the admin guide on mirrormode is misleading. http://www.openldap.org/doc/admin24/replication.html#MirrorMode According to this documentation both nodes have to be put into mirror mode, as far as I understand the concept of mirror mode, and is described in slapd.conf(5), there is one node accepting write operations, that is 'mirrormode on' statement, the other node acts as synrepl consumer and a hot standby only, with 'mirrormode off'. Could someone please correct me, if I'm wrong.
The doc is correct. For seamless failover to work automatically, without any manual intervention, both nodes must be configured identically.
On Wed, Mar 3, 2010 at 3:37 PM, Howard Chu hyc@symas.com wrote:
to my understanding the admin guide on mirrormode is misleading. http://www.openldap.org/doc/admin24/replication.html#MirrorMode According to this documentation both nodes have to be put into mirror mode, as far as I understand the concept of mirror mode, and is described in slapd.conf(5), there is one node accepting write operations, that is 'mirrormode on' statement, the other node acts as synrepl consumer and a hot standby only, with 'mirrormode off'. Could someone please correct me, if I'm wrong.
The doc is correct. For seamless failover to work automatically, without any manual intervention, both nodes must be configured identically.
I wonder out of interest, is it legal to have something like the following on both nodes (that is with two different rid=xxx syncrepl statements) ?
This would in theory allow the same config on both servers, assuming it was acceptable config-wise.
Cheers Brett
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# Global section
serverID 1 ldap://ldap-sid1.example.com serverID 2 ldap://ldap-sid2.example.com
# database section
# syncrepl directive syncrepl rid=001 provider=ldap://ldap-sid2.example.com bindmethod=simple binddn="cn=mirrormode,dc=example,dc=com" credentials=mirrormode searchbase="dc=example,dc=com" schemachecking=on type=refreshAndPersist retry="60 +"
syncrepl rid=002 provider=ldap://ldap-sid1.example.com bindmethod=simple binddn="cn=mirrormode,dc=example,dc=com" credentials=mirrormode searchbase="dc=example,dc=com" schemachecking=on type=refreshAndPersist retry="60 +"
mirrormode on
Brett @Google wrote:
I wonder out of interest, is it legal to have something like the following on both nodes (that is with two different rid=xxx syncrepl statements) ?
Yes.
This would in theory allow the same config on both servers, assuming it was acceptable config-wise.
Cheers Brett
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# Global section serverID 1 ldap://ldap-sid1.example.com serverID 2 ldap://ldap-sid2.example.com # database section # syncrepl directive syncrepl rid=001 provider=ldap://ldap-sid2.example.com bindmethod=simple binddn="cn=mirrormode,dc=example,dc=com" credentials=mirrormode searchbase="dc=example,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" syncrepl rid=002 provider=ldap://ldap-sid1.example.com bindmethod=simple binddn="cn=mirrormode,dc=example,dc=com" credentials=mirrormode searchbase="dc=example,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" mirrormode on
openldap-software@openldap.org
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Brett ＠Google -
Dieter Kluenter -
Howard Chu