[389-users] Replication questions.

[Reinhard Nappert <rnappert@xxxxxxxxxxx>]

Hi, I have a multi-master setup with three masters. All of them are running 1.2.8.2. I had created and deleted the replication environment at least 3 times.

 

The current setup looks like the following.

 

Svr A has replication id 1, Srv B has the replication id 3 and Srv C has the id 4. The replication seems to work.

 

When I look into the dse.ldif files, I see the following:

 

Srv A:

dn: cn=replica,cn=o\3base,cn=mapping tree,cn=config
nsDS5ReplicaRoot: o=base
nsDS5ReplicaId: 1
nsDS5Flags: 1
nsDS5ReplicaType: 3
objectClass: top
objectClass: nsDS5Replica
cn: replica
...

nsDS5ReplicaReferral: ldap://SrvB:389/o=base
nsDS5ReplicaReferral: ldap://SrvC:389/o=base
numSubordinates: 2

dn: cn=SrvA2SrvB,cn=replica,cn=o\3base,cn=mapping tree,cn=config
objectClass: top
objectClass: nsDS5ReplicationAgreement
...

nsDS5ReplicaRoot: o=base
nsds50ruv: {replicageneration} 4e5ab509000000010000
nsds50ruv: {replica 3 ldap://SrvB:389} 4e775b74000000030000 4e77634c00000003
 0000
nsds50ruv: {replica 4 ldap://SrvC:389} 4e77621d000000040000 4e77634900000
 0040000
nsds50ruv: {replica 1 ldap://SrvA:389} 4e5ab517000000010000 4e77633d0000000
 10000
nsds50ruv: {replica 2 ldap://SrvC:389} 4e775c9c000000020000 4e775e4c00000
 0020000
nsruvReplicaLastModified: {replica 3 ldap://SrvB:389} 00000000
nsruvReplicaLastModified: {replica 4 ldap://SrvC:389} 00000000
nsruvReplicaLastModified: {replica 1 ldap://SrvA389} 00000000
nsruvReplicaLastModified: {replica 2 ldap://SrvC:389} 00000000

 

dn: cn=SrvA2SrvC,cn=replica,cn=o\3DUMC,cn=mapping tree,cn=config
...

nsds50ruv: {replicageneration} 4e5ab509000000010000
nsds50ruv: {replica 4 ldap://SrvC:389} 4e77621d000000040000 4e77634900000
 0040000
nsds50ruv: {replica 3 ldap://SrvB:389} 4e775b74000000030000 4e77634c00000003
 0000
nsds50ruv: {replica 1 ldap://SrvA:389} 4e5ab517000000010000 4e77634e0000000
 10000
nsds50ruv: {replica 2 ldap://SrvC:389} 4e775c9c000000020000 4e775e4c00000
 0020000
nsruvReplicaLastModified: {replica 4 ldap://SrvC:389} 00000000
nsruvReplicaLastModified: {replica 3 ldap://SrvB:389} 00000000
nsruvReplicaLastModified: {replica 1 ldap://SrvA:389} 00000000
nsruvReplicaLastModified: {replica 2 ldap://SrvC:389} 00000000

I did expect that the replicageneration is equal for all of the agreements (not only locally but also for the others).

 

When, I look at SrvB and SrvC, I do not seen any replicageneration: No nsds50ruv and nsruvReplicaLastModified values!

 

Srv B:

dn: cn=replica,cn=o\3base,cn=mapping tree,cn=config
nsDS5ReplicaRoot: o=base
nsDS5ReplicaId: 2
nsDS5Flags: 1
nsDS5ReplicaType: 3
objectClass: top
objectClass: nsDS5Replica
cn: replica
...

nsDS5ReplicaReferral: ldap://SrvA:389/o=base
nsDS5ReplicaReferral: ldap://SrvC:389/o=base
numSubordinates: 2

 

dn: cn=SrvB2SrvA,cn=replica,cn=o\3base,cn=mapping tree,cn=config
objectClass: top
objectClass: nsDS5ReplicationAgreement
...

nsDS5ReplicaRoot: o=base

 

dn: cn=SrvB2SrvC,cn=replica,cn=o\3DUMC,cn=mapping tree,cn=config
...

 

Srv3 entries look like:

 

Srv C:

dn: cn=replica,cn=o\3base,cn=mapping tree,cn=config
nsDS5ReplicaRoot: o=base
nsDS5ReplicaId: 3
nsDS5Flags: 1
nsDS5ReplicaType: 3
objectClass: top
objectClass: nsDS5Replica
cn: replica
...

nsDS5ReplicaReferral: ldap://SrvB:389/o=base
nsDS5ReplicaReferral: ldap://SrvA:389/o=base
numSubordinates: 2

 

dn: cn=SrvC2SrvA,cn=replica,cn=o\3base,cn=mapping tree,cn=config
objectClass: top
objectClass: nsDS5ReplicationAgreement
...

nsDS5ReplicaRoot: o=base

 

dn: cn=SrvC2SrvB,cn=replica,cn=o\3DUMC,cn=mapping tree,cn=config
...

 

So, my questions are:

Why are the two attributes nsds50ruv and nsruvReplicaLastModified missing in the agreement objects on SrvB and SrvC. Secondly, why do I still see those old values for nsds50ruv and nsruvReplicaLastModified  in SrvA. This looks strange to me.

 

Even more confusing is that I see those attributes if I read the dn: nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff,o=base entry. Why are those nsds50ruv with old replicagenerations still there? At least the replicageneration is identical on all three boxes.

 

SrvA:

dn: nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff,o=base
objectClass: top
objectClass: nsTombstone
objectClass: extensibleobject
nsds50ruv: {replicageneration} 4e5ab509000000010000
nsds50ruv: {replica 4 ldap://SrvC:389} 4e77621d000000040000 4e7770f200000
 0040000
nsds50ruv: {replica 3 ldap://SrvB:389} 4e775b74000000030000 4e77860b00000003
 0000
nsds50ruv: {replica 1 ldap://SrvA:389} 4e5ab517000000010000 4e77859d0000000
 10000
nsds50ruv: {replica 2 ldap://SrvC:389} 4e775c9c000000020000 4e775e4c00000
 0020000
o: umc
nsruvReplicaLastModified: {replica 4 ldap://SrvC:389} 4e7770f1
nsruvReplicaLastModified: {replica 3 ldap://SrvB:389} 4e77860a
nsruvReplicaLastModified: {replica 1 ldap://SrvA:389} 4e77859c
nsruvReplicaLastModified: {replica 2 ldap://SrvC:389} 00000000

 

SrvB:

dn: nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff,o=base
objectClass: top
objectClass: nsTombstone
objectClass: extensibleobject
nsds50ruv: {replicageneration} 4e5ab509000000010000
nsds50ruv: {replica 1 ldap://SrvA:389} 4e5ab517000000010000 4e77859d0000000
 10000
nsds50ruv: {replica 4 ldap://SrvC:389} 4e77621d000000040000 4e7770f200000
 0040000
nsds50ruv: {replica 2 ldap://SrvC:389} 4e775c9c000000020000 4e775e4c00000
 0020000
nsds50ruv: {replica 3 ldap://SrvB:389} 4e775b74000000030000 4e77860b00000003
 0000
o: umc
nsruvReplicaLastModified: {replica 1 ldap://SrvA:389} 4e77859c
nsruvReplicaLastModified: {replica 4 ldap://SrvC:389} 4e7770f1
nsruvReplicaLastModified: {replica 2 ldap://SrvC:389} 00000000
nsruvReplicaLastModified: {replica 3 ldap://SrvB:389} 4e778609

 

 

SrvC:

dn: nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff,o=base
objectClass: top
objectClass: nsTombstone
objectClass: extensibleobject
nsds50ruv: {replicageneration} 4e5ab509000000010000
nsds50ruv: {replica 3 ldap://SrvB:389} 4e775b74000000030000 4e77860b00000003
 0000
nsds50ruv: {replica 4 ldap://SrvC:389} 4e77621d000000040000 4e7770f200000
 0040000
nsds50ruv: {replica 1 ldap://SrvA:389} 4e5ab517000000010000 4e77859d0000000
 10000
nsds50ruv: {replica 2 ldap://SrvC:389} 4e775c9c000000020000 4e775e4c00000
 0020000
o: umc
nsruvReplicaLastModified: {replica 3 ldap://SrvB:389} 4e77860a
nsruvReplicaLastModified: {replica 4 ldap://SrvC:389} 4e7770f1
nsruvReplicaLastModified: {replica 1 ldap://SrvA:389} 4e77859c
nsruvReplicaLastModified: {replica 2 ldap://SrvC:389} 00000000

 

 

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