Hacker News Reader

Comment by willbeddow | Hacker News Reader

have not used longhorn, but we are currently in the process of migrating off of ceph after an extremely painful relationship with it. Ceph has fundamental design flaws (like the way it handles subtree pinning) that, IMO, make more modern distributed filesystems very useful. SeaweedFS is also cool, and for high performance use cases, weka is expensive but good.

View on HN

That sounds more like a CephFS issue than a Ceph issue.

(a lot of us distrust distributed 'POSIX-like' filesystems for good reasons)

Are there any distributed POSIX filesystems which don’t suck? I think part of the issue is that POSIX compliant filesystem just doesn’t scale, and you are just seeing that?

weka seems to Just Work from our tests so far, even under pretty extreme load with hundreds of mounts on different machines, lots of small files, etc... Unfortunately it's ungodly expensive.

I think Lustre works fairly well. At the very least, it's used in a lot of HPC centers to handle large filesystems that get hammered by lots of nodes concurrently. It's open source so nominally free although getting a support contract from specialized consulting firm might be pricey.

https://www.reddit.com/r/AMD_Stock/comments/1nd078i/scaleup_...

You're going to have to open the image and then go to the third image. I thought it was interesting that OCI pegs Lustre at 8Gb/s and their high performance FS at much higher than that... 20-80.

That's 8Gb/s per TB of storage. The bandwidth is going to scale up as you add OSTs and OSSs. The OCI FS maxes at 80Gb/s per mount target.

Basically, we are building this at Archil (https://archil.com). The reason these things are generally super expensive is that it’s incredibly hard to build.

Reply on news.ycombinator.com