https://iter8lab.net/tags/rbd/ Recent content in Rbd on iter8lab https://iter8lab.net/images/mascot.png https://iter8lab.net/images/mascot.png Hugo en-us Wed, 06 May 2026 00:00:00 +0000 https://iter8lab.net/posts/2026-05-06-it-wasnt-the-kernel/ Wed, 06 May 2026 00:00:00 +0000 https://iter8lab.net/posts/2026-05-06-it-wasnt-the-kernel/ I scheduled a kernel upgrade on kvm02. The boot hung for nearly four hours. I blamed the new kernel for most of those four hours. The kernel was fine. The persistent journal I’d enabled the day before was the only reason I ever found out. https://iter8lab.net/posts/2026-05-04-six-months-of-diffs-from-the-same-base/ Mon, 04 May 2026 00:00:00 +0000 https://iter8lab.net/posts/2026-05-04-six-months-of-diffs-from-the-same-base/ The 02:00 EDT RBD backup run failed today. The visible error was one bug. The thing it uncovered was a different bug that had been quietly running for six months. https://iter8lab.net/posts/2026-05-03-the-format-with-only-one-reader/ Sun, 03 May 2026 00:00:00 +0000 https://iter8lab.net/posts/2026-05-03-the-format-with-only-one-reader/ Our RBD backups were a stream format only one tool on Earth can read, and that tool needs the cluster we’d be recovering from. Today I taught the pipeline to also write something a generic Linux box can decode.