LUP 545: 3,062 Days Later¶
- Air Date: 2024-01-14
- Duration: 57 mins 15 secs
About this episode¶
Kent Overstreet, the creator of bcachefs, helps us understand where his new filesystem fits, what it's like to upstream a new filesystem, and how they've solved the RAID write hole.
Your hosts¶
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Episode links¶
- 💥 Gets Sats Quick and Easy with Strike
- 📻 LINUX Unplugged on Fountain.FM
- Boltz — Privacy First, Non-Custodial Bitcoin Exchange.
- bcachefs — bcachefs is an advanced new filesystem for Linux, with an emphasis on reliability and robustness and the complete set of features one would expect from a modern filesystem.
- bcachefs Erasure coding — Bcachefs takes advantage of the fact that it is already a copy-on-write filesystem. If we're designing our filesystem to avoid update-in-place, why would we do update-in-place in our RAID implementation?
- bcachefs Caching — bcachefs can be configured for writethrough, writeback, and writearound caching, as well as other more specialized setups.
- bachefs Compression — Unlike other filesystems that typically do compression at the block level, bcachefs does compression at the extent level - variable size chunks, up to (by default) 128k.
- bcachefs Encryption — bcachefs uses AEAD style encryption (ChaCha20/Poly1305), where each encrypted block is authenticated with a MAC, with a chain of trust up to root (the superblock), and every encrypted block has a unique nonce.
- bcachefs Snapshots — bcachefs provides Btrfs style writeable snapshots, at subvolume granularity.
- (2015) [ANNOUNCE] bcachefs - a general purpose COW filesystem — It's taken a long time to get to this point - longer than I would have guessed if you'd asked me back when we first started talking about it - but I'm pretty damn proud of where it's at now.
- Kent Overstreet's Patreon
- Unplugged Core Membership
- Jupiter Signal PROMO 2024 — $3 off a month forever.
- Webamp — Winamp 2 re-implemented for the browser.
- Webamp on GitHub — Winamp 2 reimplemented for the browse.
- The Official JB BBS! — vt52 hosts our new official JB BBS!
telnet http://pebkac.lol
Tags¶
32-bit challenge, bbs, bcache, bcachefs, boosts, btrfs, caching, car camping, checksumming, ci, community, compression, copy on write, cow, database, encryption, erasure coding, filesystems, jupiter broadcasting, kent overstreet, linus, linux, linux podcast, linux unplugged, low latency, modern filesystem, nixos, performance, raid, raspberry pi, reliability, replication, rust, scalability, scale, snapshots, tail latency, technology, upstreaming, write hole, xfs, zfs