https://exquisite.tube/videos/watch/f93c3dc3-25b3-4a80-8fe9-f488dc72e655 Earlier this year I conducted a performance investigation and tuning of a slow backup job. Essentially, a single rsync syncing a deeply nested directory tree with thousands of files over the network onto a ZFS dataset on a remote server. After a reboot of the remote server, the backup would be received and saved on a local filesystem in about 10 minutes. Unfortunately, as the uptime grew the rsync would run for days on end instead of minutes. During the talk I will share with you how I figured out where rsync's bottleneck was and what I did to make the syncing finish within the expected timeframe of 10 minutes. I will show you what tools I used during the investigation to discover what parts of the system are screaming for help and to verify my hypothesis of where the root cause is. We will explore tuning of caching on FreeBSD, ZFS performance metrics, and using DTrace to get a closer look at system's internals. That's all Folks! Tue, 15 Sep 2026 09:31:45 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://exquisite.tube https://exquisite.tube/lazy-static/avatars/15cdbc2e-7773-4916-99e9-38207b20252d.png https://exquisite.tube/videos/watch/f93c3dc3-25b3-4a80-8fe9-f488dc72e655 All rights reserved, unless otherwise specified in the terms specified at https://exquisite.tube/about and potential licenses granted by each content's rightholder.