Linux - The Next GenerationWhat’s block cloning? Block cloning allows to copy files (or parts of it = blocks) without allocating extra space (besides the metadata required for filename, attributes, or the references to existing on disk blocks). Similar techniques are used to implement things like snapshots or deduplication in filesystems supporting them. In practice this feature is very […]
After upgrading my Ubuntu 22.04 installation to Ubuntu 24.04.1 (using do-release-upgrade) my NFS exports stopped working. Kernel 6.8.0-41 reported an OOPS as soon as the NFS share was accessed (using sec=krb5b on the NFS client): Looking for a similar bug I found one on the NFS kernel mailing list titled “[PATCH] SUNRPC: Fix loop termination […]
The tests were done on a Quad-Core i5 system, using a 24 GB RAM disk (32 GB RAM total). System is Ubuntu 20.04 (x86_64). Basic test were done using fio with variations of this command: The different benchmark scenarios are these: Create filesystem on RAM disk, create big test file, run fio. And the same […]