# Percona ClusterSync for Mongodb Feedback
**URL:** https://forums.percona.com/t/percona-clustersync-for-mongodb-feedback/39505
**Category:** Percona ClusterSync for MongoDB (PCSM)
**Created:** [October 7, 2025, 5:45am UTC](https://forums.percona.com/t/percona-clustersync-for-mongodb-feedback/39505 "2025-10-07T05:45:50Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Semantic](https://forums.percona.com/u/Semantic)
#### Post date: [October 7, 2025, 5:45am UTC](https://forums.percona.com/t/percona-clustersync-for-mongodb-feedback/39505/1 "2025-10-07T05:45:50Z")
Wanted to give a bit of feedback to you guys on percona-link-mongodb. It’s really useful to migrate small/medium clusters (even cross region) and avoids having to deal with the whole backup and restore process.
I did however have to [fork it](https://github.com/balthazar/percona-link-mongodb) in order to increase a timeout due to my cluster being quite large as it would otherwise fail on the 5 minutes hardcoded value.
It also acted a bit strange processing an oplog as it was only doing cycles of network burts every hour or so for 10-15min and then stopped without much disk or CPU activity which made it extra slow to catchup. This particular cluster does a lot of writes and has a TTL index doing auto deletes, which could be a reason why it acted that way.
Given this slow oplog processing which might be a bug or a quirk for this specific cluster, I didn’t end up trying it on my bigger (~1TB wiredtiger) clusters migrations and opted for a physical restore, but overall great tool!
Cheers!
@radoslaw.szulgo @daniil.bazhenov
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### Author:  [@Inel\_Pandzic](https://forums.percona.com/u/Inel_Pandzic)
#### Post date: [October 8, 2025, 11:34am UTC](https://forums.percona.com/t/percona-clustersync-for-mongodb-feedback/39505/2 "2025-10-08T11:34:14Z")
Hey @Semantic
Really appreciate the feedback from you. Yes, currently replication performance is not what we are happy about and we have a task to improve it, we know what is the bottleneck. Hopefully in 0.8.0 we could have this improvement.
Regarding the timeout, I’ll create a task to make it configurable, that’l make it a bit easier to override rather than a fork 🙂
Again, thanks for the feedback, it helps us a lot to make PLM better.
Cheers,
Inel
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### Author:  [@Semantic](https://forums.percona.com/u/Semantic)
#### Post date: [October 8, 2025, 12:58pm UTC](https://forums.percona.com/t/percona-clustersync-for-mongodb-feedback/39505/3 "2025-10-08T12:58:51Z")
Glad that helped 😃
I could make a PR if the implementation is satisfying for you guys, no worries if not
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### Author:  [@Inel\_Pandzic](https://forums.percona.com/u/Inel_Pandzic)
#### Post date: [October 8, 2025, 1:58pm UTC](https://forums.percona.com/t/percona-clustersync-for-mongodb-feedback/39505/4 "2025-10-08T13:58:12Z")
Please do, that would be awesome 🙂
I believe your implementation is good, but I something comes up, we can discuss it in the PR.
Thanks!