@fjallrs.bsky.social
Snazzy Rust KV store @ https://github.com/sponsors/fjall-rs
Love it when SQLite just stops working but allocates hundreds of GBs of disk space.
December 24, 2025 at 2:52 PM
Love it when SQLite just stops working but allocates hundreds of GBs of disk space.
Reposted
Check out my talk on physical replication and Graft that I delivered at the recent @syncconf.bsky.social in SF. youtu.be/QoKzDyH2MEA?...
Carl Sverre (SQLSync) - Why Physical Replication Still Matters
YouTube video by Local-First Conf
youtu.be
December 9, 2025 at 3:36 AM
Check out my talk on physical replication and Graft that I delivered at the recent @syncconf.bsky.social in SF. youtu.be/QoKzDyH2MEA?...
Well... looks like my Kingston disk just died...?!
December 7, 2025 at 1:30 PM
Well... looks like my Kingston disk just died...?!
Maria Somerville - Projections (Official Video)
YouTube video by Maria Somerville
youtu.be
December 2, 2025 at 1:47 AM
RC 1 is out! I forgot to post about RC 0, but here we are.
At this point API and disk format are unlikely to further change - now it's all about stabilization for the final release...
crates.io/crates/fjall...
At this point API and disk format are unlikely to further change - now it's all about stabilization for the final release...
crates.io/crates/fjall...
crates.io: Rust Package Registry
crates.io
November 25, 2025 at 7:12 PM
RC 1 is out! I forgot to post about RC 0, but here we are.
At this point API and disk format are unlikely to further change - now it's all about stabilization for the final release...
crates.io/crates/fjall...
At this point API and disk format are unlikely to further change - now it's all about stabilization for the final release...
crates.io/crates/fjall...
v3 pre.6 is out - probably the penultimate prerelease before going into release candidate(s). At this point, all major architectural reworks are done, and just some APIs need some changes. Followed by a final cleanup and stabilization phase.
crates.io/crates/fjall...
crates.io/crates/fjall...
crates.io: Rust Package Registry
crates.io
November 13, 2025 at 6:42 PM
v3 pre.6 is out - probably the penultimate prerelease before going into release candidate(s). At this point, all major architectural reworks are done, and just some APIs need some changes. Followed by a final cleanup and stabilization phase.
crates.io/crates/fjall...
crates.io/crates/fjall...
3.0.0 pre.5 is out and brings journal compression support.
Here's 16K JSON blobs being written:
Here's 16K JSON blobs being written:
November 8, 2025 at 2:56 PM
3.0.0 pre.5 is out and brings journal compression support.
Here's 16K JSON blobs being written:
Here's 16K JSON blobs being written:
v3 pre-release 2 is out!
Still not file format -or API stable, but most importantly this release marks lsm-tree being *feature complete*.
crates.io/crates/fjall...
Still not file format -or API stable, but most importantly this release marks lsm-tree being *feature complete*.
crates.io/crates/fjall...
crates.io: Rust Package Registry
crates.io
October 28, 2025 at 10:15 PM
v3 pre-release 2 is out!
Still not file format -or API stable, but most importantly this release marks lsm-tree being *feature complete*.
crates.io/crates/fjall...
Still not file format -or API stable, but most importantly this release marks lsm-tree being *feature complete*.
crates.io/crates/fjall...
Well, it was a faulty RAM stick everybody
October 26, 2025 at 12:24 PM
Well, it was a faulty RAM stick everybody
So I have now tried btrfs, xfs, ext4 on two diff. SSDs, updating to Ubuntu 24; and I'm still getting corruptions... at this point I don't really know what to do.
This is not code specific (RocksDB is also affected), yet I don't understand how my OS and all apps just seem to continue to work fine...
This is not code specific (RocksDB is also affected), yet I don't understand how my OS and all apps just seem to continue to work fine...
October 25, 2025 at 4:22 PM
So I have now tried btrfs, xfs, ext4 on two diff. SSDs, updating to Ubuntu 24; and I'm still getting corruptions... at this point I don't really know what to do.
This is not code specific (RocksDB is also affected), yet I don't understand how my OS and all apps just seem to continue to work fine...
This is not code specific (RocksDB is also affected), yet I don't understand how my OS and all apps just seem to continue to work fine...
95% Zipfian reads, 5% random updates on a Kingston PLP SSD with 16K JSON blobs - sled DNF! (OOM)
fjall uses LZ4 compression
fjall uses LZ4 compression
October 9, 2025 at 5:21 PM
95% Zipfian reads, 5% random updates on a Kingston PLP SSD with 16K JSON blobs - sled DNF! (OOM)
fjall uses LZ4 compression
fjall uses LZ4 compression
Reposted
constellation runs on a bare metal server with 4 dedicated CPU cores, 16GiB memory, 1TiB fast NVMe SSD attached, and 500mbit unmetered network connection.
turns out raspberry pis are really fast these days
October 8, 2025 at 1:46 PM
constellation runs on a bare metal server with 4 dedicated CPU cores, 16GiB memory, 1TiB fast NVMe SSD attached, and 500mbit unmetered network connection.
Blob GC working again (now fully automatic) - much less impact on foreground work (old GC was stop-the-world)
October 5, 2025 at 3:53 PM
Blob GC working again (now fully automatic) - much less impact on foreground work (old GC was stop-the-world)
Fun coloured bars and lines
October 2, 2025 at 5:09 PM
Fun coloured bars and lines
Reposted
If you sponsor NOW (github.com/sponsors/fja...), you can get an exclusive preview of version 3!!
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
Sponsor @fjall-rs on GitHub Sponsors
Support fjall-rs's open source work
github.com
September 26, 2025 at 7:28 PM
If you sponsor NOW (github.com/sponsors/fja...), you can get an exclusive preview of version 3!!
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
If you sponsor NOW (github.com/sponsors/fja...), you can get an exclusive preview of version 3!!
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
Sponsor @fjall-rs on GitHub Sponsors
Support fjall-rs's open source work
github.com
September 26, 2025 at 7:28 PM
If you sponsor NOW (github.com/sponsors/fja...), you can get an exclusive preview of version 3!!
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
jk I pushed the first pre-release to crates.io - it's unstable though! Breakages guaranteed, and some APIs are missing!
bye
ngl v3 is a bit more involved than I originally planned or anticipated; I don't want breaking changes for a while, so it becomes this chase of making sure everything is really future-proof
September 23, 2025 at 1:49 AM
ngl v3 is a bit more involved than I originally planned or anticipated; I don't want breaking changes for a while, so it becomes this chase of making sure everything is really future-proof
I will never do a major release like this again
September 18, 2025 at 5:03 PM
I will never do a major release like this again
I really dread having to some day write a quick_cache replacement, tailored for lsm-tree
September 16, 2025 at 6:30 PM
I really dread having to some day write a quick_cache replacement, tailored for lsm-tree
friendship with ext4 ended, xfs is my new best friend
(whyyy is ext4 still giving me corruptions sometimes, even after updating my kernel??)
(whyyy is ext4 still giving me corruptions sometimes, even after updating my kernel??)
September 6, 2025 at 10:49 PM
friendship with ext4 ended, xfs is my new best friend
(whyyy is ext4 still giving me corruptions sometimes, even after updating my kernel??)
(whyyy is ext4 still giving me corruptions sometimes, even after updating my kernel??)
Yeah, that's a bit better
September 6, 2025 at 10:02 PM
Yeah, that's a bit better
For weeks I've been regularly getting corruptions while running benchmarks... for RocksDB, too. It's infuriating because running a 15min+ benchmark is a coin flip whether it completes.
Seems like it was an issue with my arguably outdated Linux kernel... there were ext4 corruption bugs a while ago.
Seems like it was an issue with my arguably outdated Linux kernel... there were ext4 corruption bugs a while ago.
August 24, 2025 at 4:25 PM
For weeks I've been regularly getting corruptions while running benchmarks... for RocksDB, too. It's infuriating because running a 15min+ benchmark is a coin flip whether it completes.
Seems like it was an issue with my arguably outdated Linux kernel... there were ext4 corruption bugs a while ago.
Seems like it was an issue with my arguably outdated Linux kernel... there were ext4 corruption bugs a while ago.
Reposted
For a framework renowned for its innovation, it is funny how little Solid has changed in the last 7 years. Yeah we've innovated on features, fine-grained concurrency/hydration, streaming, server functions, single flight mutations, but the core tech and structure are untouched.
August 14, 2025 at 4:00 PM
For a framework renowned for its innovation, it is funny how little Solid has changed in the last 7 years. Yeah we've innovated on features, fine-grained concurrency/hydration, streaming, server functions, single flight mutations, but the core tech and structure are untouched.
History repeats itself
August 9, 2025 at 11:42 PM
History repeats itself
Lovely 3D plots to sweeten the day
August 7, 2025 at 4:57 PM
Lovely 3D plots to sweeten the day