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Posted to notifications@james.apache.org by rc...@apache.org on 2020/10/14 02:31:27 UTC

[james-project] 01/22: JAMES-3406 Detail more multi-dc setup

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rcordier pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/james-project.git

commit 1d5e45986289094dd08f3ed7bd480bcef3e28916
Author: Benoit Tellier <bt...@linagora.com>
AuthorDate: Tue Oct 13 08:58:20 2020 +0700

    JAMES-3406 Detail more multi-dc setup
---
 .../servers/pages/distributed/architecture/consistency-model.adoc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/docs/modules/servers/pages/distributed/architecture/consistency-model.adoc b/docs/modules/servers/pages/distributed/architecture/consistency-model.adoc
index e5facc4..a14ad9a 100644
--- a/docs/modules/servers/pages/distributed/architecture/consistency-model.adoc
+++ b/docs/modules/servers/pages/distributed/architecture/consistency-model.adoc
@@ -46,10 +46,12 @@ link:https://docs.datastax.com/en/ddac/doc/datastax_enterprise/production/DDACmu
 Cassandra setup is discouraged.
 
 However xref:distributed/configure/cassandra.adoc[this page] enables setting alternative read level,
-which could be acceptable regarding limited requirements.
+which could be acceptable regarding limited requirements. `LOCAL_QUORUM` coupled with `LOCAL_SERIAL`
+is likely the only scalable setup.
 
-Running the Distributed Server in a multi datacenter setup will likely result either in data loss,
-or very slow operations.
+Running the Distributed Server IMAP server in a multi datacenter setup will likely result either in data loss,
+or very slow operations - as we rely on monotic UID generation, without strong consistency, UIDs could be allocated
+several times. Other protocols, like JMAP, suffer less from such limitations.
 
 === ElasticSearch consistency model
 


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