Companion Notebook · Conference Page · Video

⊕

Every Ceph daemon exposes a Admin Socket interface, that accepts diagnostic commands at runtime. It provides access to internal state that standard metrics don't cover: in-flight operations, PG details, cache contents, configuration overrides. This talk surveys the interface, highlights some interesting commands and shows how to craft tools around them.

The companion notebook includes source data, tools, and a runnable notebook to reproduce the examples.

Companion Notebook · Conference Page / Video · Slides

⊕

Metrics describe aggregate behavior but don't show what happens inside a specific request. Ceph already has internal instrumentation points that eBPF tools can attach to, exposing the path a request takes through the stack without modifying the source. This talk covers how to use these tools to trace and analyze operations where metrics aren't enough.

The companion notebook includes source data, tools, and a runnable notebook to reproduce the examples.

Companion Notebook · Conference Page · Video

⊕

Ceph exposes hundreds of performance counters, and the names alone don't always make clear what they measure. This talk explains perf counters and working with them in a series of experiments.

The companion notebook includes source data, tools, and a runnable notebook to reproduce the examples.

media.ccc.de · German

⊕

Object storage, block devices, and filesystems solve different problems with different semantics. This talk covers what each abstraction guarantees, what it gives up, and how S3, RADOS, RBD, and POSIX differ in practice.

media.ccc.de · German

⊕

Linux filesystem design evolved from flat on-disk layouts to journaling, extent-based allocation, and copy-on-write.

This talk traces that evolution and builds a conceptual map of the Linux filesystem landscape.