parallel-fs-ops.template.yml (2.8 KB) Let’s talk about a scaling problem that becomes painfully obvious once a Discourse site accumulates a large upload library. What used to take minutes for a chown command to run across a huge uploads directory now takes seconds! Background Discourse rebuilds c…

Nice. I guess that’s why S3 and CDN are things.

Yup. But not everyone wants to add that complexity. I kind of am using S3/R2/B2 via using JuiceFS. That way it mounts locally like a real file system, and no worries. And then Cloudflare caches the assets that way automagicallly.

Should this instead be a PR that changes the templates doing the chown?

Yes please! I’ve moved this out of Wiki and back to Support > Self-hosting , since it’s not really a pattern we want to encourage everyone to handle manually. If there’s a safe performance improvement we can make in the upstream template, let’s do that! I don’t think we’d want to override the syste…

Let’s try a simpler version first. This doesn’t run anything in parallel, but it does skip the chown for files which already have the correct permissions. It’s a pattern that we’re already using elsewhere in discourse_docker: PERF: Skip chown for f…

Rebuilds taking a long time with a large number of uploads (chown performance)

Support Self-hosting

dennisjbr August 27, 2026, 7:14am 8

Just saw this and saw the PR. Definitely a nice compromise but huge perf gain for sure. It’s always the little things…

Topic		Replies	Views
Make rebuild with many uploads more efficient? Support	3	576	March 13, 2020
Stuck @ CHOWN for /var/www/discourse Self-hosting	15	2869	May 31, 2018
Skipping an step in discourse rebuild Support	1	492	September 19, 2020
Slow Discourse Rebuild on a VM with slow disks Self-hosting	7	1174	February 12, 2021
Этот файл слишком большой Self-hosting	29	562	May 4, 2026

Rebuilds taking a long time with a large number of uploads (chown performance)

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