# \#xdc **URL:** https://community.temporal.io/tag/xdc/106.md [Latest](https://community.temporal.io/latest.md) · [Categories](https://community.temporal.io/categories.md) · [Tags](https://community.temporal.io/tags.md) --- ## [Should the secondary XDC cluster be far larger than the primary?](https://community.temporal.io/t/should-the-secondary-xdc-cluster-be-far-larger-than-the-primary/19564)
**Author:** [@jmo](https://community.temporal.io/u/jmo)\ **Replies:** 1\ **Last updated:** [July 21, 2026, 4:11pm UTC](https://community.temporal.io/t/should-the-secondary-xdc-cluster-be-far-larger-than-the-primary/19564 "2026-07-21T16:11:22Z")
We’re running Temporal 1.31.0 (via the helm chart) with XDC replication across two aurora postgres clusters (temporal-primary, temporal-secondary). We’ve noticed temporal-secondary consistently runs significantly larger … --- ## ["History scavenger does nothing on XDC standby cluster — how is secondary DB size supposed to stay bounded?"](https://community.temporal.io/t/history-scavenger-does-nothing-on-xdc-standby-cluster-how-is-secondary-db-size-supposed-to-stay-bounded/19588)
**Author:** [@jmo](https://community.temporal.io/u/jmo)\ **Replies:** 22\ **Last updated:** [June 30, 2026, 12:56am UTC](https://community.temporal.io/t/history-scavenger-does-nothing-on-xdc-standby-cluster-how-is-secondary-db-size-supposed-to-stay-bounded/19588 "2026-06-30T00:56:07Z")
We’re running Temporal 1.31 with XDC replication across two Aurora PostgreSQL clusters. Our secondary is 3.6TB vs our primary at 419GB after months of healthy replication. We can see temporal-sys-history-scanner-workflo… --- ## [Whats optimal settings for quick xdc replication? what metrics can one track?](https://community.temporal.io/t/whats-optimal-settings-for-quick-xdc-replication-what-metrics-can-one-track/3793)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 12\ **Last updated:** [July 8, 2024, 10:19am UTC](https://community.temporal.io/t/whats-optimal-settings-for-quick-xdc-replication-what-metrics-can-one-track/3793 "2024-07-08T10:19:24Z")
have an xdc setup and have about 1500 worflows with reasonable amount of history (say 200 to 300 activity)… i am seeing that the first time replication is actually takeing some time ( 3+ hours already), i tried increasin… --- ## [XDC Replication in Practice](https://community.temporal.io/t/xdc-replication-in-practice/2888)
**Author:** [@RobZienert](https://community.temporal.io/u/RobZienert)\ **Replies:** 26\ **Last updated:** [September 18, 2023, 8:49pm UTC](https://community.temporal.io/t/xdc-replication-in-practice/2888 "2023-09-18T20:49:04Z")
I had started a thread in Slack about trying to find other users of XDC that exercise failovers of XDC regularly. While it’s experimental, it’s a crucial feature for us at Netflix to have a multi-region presence (especia… --- ## [Possible to use Cassandra data replication for Active/Passive Temporal setup?](https://community.temporal.io/t/possible-to-use-cassandra-data-replication-for-active-passive-temporal-setup/6591)
**Author:** [@sgupta](https://community.temporal.io/u/sgupta)\ **Replies:** 7\ **Last updated:** [December 6, 2022, 2:10am UTC](https://community.temporal.io/t/possible-to-use-cassandra-data-replication-for-active-passive-temporal-setup/6591 "2022-12-06T02:10:40Z")
What is the difference between relying on Cassandra data replication vs using Temporal XDC Active/Passive setup. e.g. if Temporal cluster in one region goes down and we have a stand-by cluster in another region connected… --- ## [Running into problems testing multi-cluster replication locally via docker](https://community.temporal.io/t/running-into-problems-testing-multi-cluster-replication-locally-via-docker/5920)
**Author:** [@amajedi](https://community.temporal.io/u/amajedi)\ **Replies:** 6\ **Last updated:** [September 23, 2022, 3:46pm UTC](https://community.temporal.io/t/running-into-problems-testing-multi-cluster-replication-locally-via-docker/5920 "2022-09-23T15:46:41Z")
Hello :wave: I was hoping to test out the multi-cluster replication feature of Temporal locally in docker to test out a few scenarios and answer a few questions, but have been unable to get this feature working as far a… --- ## [XDC Namespace create/update events are not getting replicated/applied](https://community.temporal.io/t/xdc-namespace-create-update-events-are-not-getting-replicated-applied/5717)
**Author:** [@Andrey\_Dubnik](https://community.temporal.io/u/Andrey_Dubnik)\ **Replies:** 6\ **Last updated:** [August 30, 2022, 3:39pm UTC](https://community.temporal.io/t/xdc-namespace-create-update-events-are-not-getting-replicated-applied/5717 "2022-08-30T15:39:05Z")
Hi, We have an ongoing issue with the current cluster (1.17.1) and the XDC which manifests in a following ways: ClusterA to ClusterB is broken only for the namespace related events, all the workflow events are flowing … --- ## [For how long events are kept in the replication queue for the XDC?](https://community.temporal.io/t/for-how-long-events-are-kept-in-the-replication-queue-for-the-xdc/5730)
**Author:** [@Andrey\_Dubnik](https://community.temporal.io/u/Andrey_Dubnik)\ **Replies:** 1\ **Last updated:** [August 24, 2022, 10:30pm UTC](https://community.temporal.io/t/for-how-long-events-are-kept-in-the-replication-queue-for-the-xdc/5730 "2022-08-24T22:30:44Z")
Hi, We have a hopefully an easy question to answer. In the scenario when the XDC is stood up and a secondary cluster goes under the maintenance events would be created on the primary but not collected by the secondary … --- ## [XDC replication into the new cluster for the in-flight workflows](https://community.temporal.io/t/xdc-replication-into-the-new-cluster-for-the-in-flight-workflows/4819)
**Author:** [@Andrey\_Dubnik](https://community.temporal.io/u/Andrey_Dubnik)\ **Replies:** 3\ **Last updated:** [May 30, 2022, 9:32pm UTC](https://community.temporal.io/t/xdc-replication-into-the-new-cluster-for-the-in-flight-workflows/4819 "2022-05-30T21:32:28Z")
Hi, I have a question around the XDC replication in the following scenario We have a long running WF in Cluster-A which does something and goes to sleep/wait for the event. We are adding the Cluster-B in the loop on so… --- ## [Clusters out of sync](https://community.temporal.io/t/clusters-out-of-sync/4151)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 3\ **Last updated:** [March 11, 2022, 8:20am UTC](https://community.temporal.io/t/clusters-out-of-sync/4151 "2022-03-11T08:20:43Z")
I have a multi cluster setup (primary and standby) after a while (say couple of days to months usage) and few failovers from primary to secondary and vice versa i see that the two clusters get out of sync. When i do … --- ## [Multiple cluster metadata does not work in version 1.14.0](https://community.temporal.io/t/multiple-cluster-metadata-does-not-work-in-version-1-14-0/3767)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 1\ **Last updated:** [January 17, 2022, 5:05pm UTC](https://community.temporal.io/t/multiple-cluster-metadata-does-not-work-in-version-1-14-0/3767 "2022-01-17T17:05:06Z")
hi i am trying to setup a new temporal xdc cluster on 1.14.0 and since its 1.14+ i tried the configuration Multi-cluster Replication | Temporal Documentation how ever the frontent.history.matching and worker fails to c… --- ## [Multi-Cluster Replication config changes corrupting database](https://community.temporal.io/t/multi-cluster-replication-config-changes-corrupting-database/3702)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 12\ **Last updated:** [January 17, 2022, 11:16am UTC](https://community.temporal.io/t/multi-cluster-replication-config-changes-corrupting-database/3702 "2022-01-17T11:16:44Z")
I did a poc to set up a multi cluster env and i was able to do it successfully configure the same the details of what i tried are documented here → I tried this as a brand new setup. Now, i am trying to update an exis… --- ## [XDC Limitations and Tradeoffs](https://community.temporal.io/t/xdc-limitations-and-tradeoffs/3742)
**Author:** [@nathan\_shields](https://community.temporal.io/u/nathan_shields)\ **Replies:** 0\ **Last updated:** [January 12, 2022, 8:03pm UTC](https://community.temporal.io/t/xdc-limitations-and-tradeoffs/3742 "2022-01-12T20:03:21Z")
I’m planning to run two Temporal clusters, each in a different AWS regions, and I’m looking into XDC replication. The use case is long-running workflows which will occasionally be signaled and need to run a time-sensitiv… --- ## [Have any body tried temporal multi cluster replication on differnt regions?](https://community.temporal.io/t/have-any-body-tried-temporal-multi-cluster-replication-on-differnt-regions/2652)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 21\ **Last updated:** [October 5, 2021, 2:17am UTC](https://community.temporal.io/t/have-any-body-tried-temporal-multi-cluster-replication-on-differnt-regions/2652 "2021-10-05T02:17:23Z")
I am presently running a single cluster temporal. For DR reasons, i am planning to upgrade my setup to a multi cluster one running in two differnt regions on AWS (us west 2 and us east 2). Have any body tried this alr… --- ## [How to enable gloabl namespace and register the same?](https://community.temporal.io/t/how-to-enable-gloabl-namespace-and-register-the-same/2768)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 4\ **Last updated:** [August 24, 2021, 10:27am UTC](https://community.temporal.io/t/how-to-enable-gloabl-namespace-and-register-the-same/2768 "2021-08-24T10:27:11Z")
Hi i am running tctl using docker compose, and i am looking to setup global namespace. I have added the following to my development.yaml file global: membership: maxJoinDuration: 30s broadcastAddress: “127.0.0.1” p… --- ## [What does one loose by depending upon the datbase replication, instead of temporal server xdc replication?](https://community.temporal.io/t/what-does-one-loose-by-depending-upon-the-datbase-replication-instead-of-temporal-server-xdc-replication/2672)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 1\ **Last updated:** [August 6, 2021, 3:42pm UTC](https://community.temporal.io/t/what-does-one-loose-by-depending-upon-the-datbase-replication-instead-of-temporal-server-xdc-replication/2672 "2021-08-06T15:42:45Z")
Given that Temporal XDC setup is Active/Passive, What do i get to loose, if idont do an xdc setup and depdend upon the replication done my mysql/auroa db to start the passive cluser when required? --- ## [Cross DC architecture](https://community.temporal.io/t/cross-dc-architecture/1133)
**Author:** [@wandrewchan](https://community.temporal.io/u/wandrewchan)\ **Replies:** 4\ **Last updated:** [December 18, 2020, 10:35pm UTC](https://community.temporal.io/t/cross-dc-architecture/1133 "2020-12-18T22:35:54Z")
Hi all, we would like to have a cross dc function for temporal service, so that we would like to know the relationship between Kafka and Elasticsearch, how these two can help with cross dc replication? Thanks. --- ## [Temporal XDC replication](https://community.temporal.io/t/temporal-xdc-replication/1036)
**Author:** [@madhu](https://community.temporal.io/u/madhu)\ **Replies:** 1\ **Last updated:** [November 19, 2020, 9:29pm UTC](https://community.temporal.io/t/temporal-xdc-replication/1036 "2020-11-19T21:29:37Z")
Today, xdc replication is possible through kafka streams , is there plan in place for xdc, replications? e.g. pulsar , firehose or db based replications ( cockroach is already supported), or any other plans?