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Antw: Re: n-way multi master and mirror mode
>>> Quanah Gibson-Mount <quanah@symas.com> schrieb am 05.12.2016 um 04:23 in
Nachricht <B493EDA8384741090D4FD1B6@[192.168.1.19]>:
> --On Sunday, December 04, 2016 11:03 PM +0000 Howard Chu <hyc@symas.com>
> wrote:
>
>> Brendan Kearney wrote:
>>> On 12/04/2016 04:49 PM, Quanah Gibson-Mount wrote:
>>>> Again, Mirror Mode is a concept, not a setting. The setting you refer
>>>> to, is, as I previously noted, misnamed. Either your servers are
>>>> configured to do multimaster replication, or they aren't.
>>
>> Mirrormode - the concept - is irrelevant here. All of the official docs
>> show the mirrormode setting being used in N-Way multimaster.
>
> Because the documentation is wrong and needs to be fixed.
>
>>> yes, i seem to be in the trap about the mirror mode misnomer. though
>>> ambiguous, your statements indicate that mirror mode the setting is
>>> required for n-way multi master replication.
>>
>> That is what the Admin Guide already says.
>
> And that is a proveably false statement and needs to be rectified. There
> is zero requirement to put a load balancer in front of an MMR setup.
But it seems to make much sense: In my experience if you configure multiple LDAP servers, the NSS resolver always uses the first configured server as long as it's reachable; even if it's not, the first configured server is tried first. After connection timeout the second server is tried... We had dhad a case when all LDAP operations were heavily delayed when two out of three servers had failed (due to rebooting the machine).
Ulrich
>
> --Quanah
>
> --
>
> Quanah Gibson-Mount
> Product Architect
> Symas Corporation
> Packaged, certified, and supported LDAP solutions powered by OpenLDAP:
> <http://www.symas.com>