Btrfs Gets More RAID 5/6 Fixes In Linux 4.16

[pal666]

I believe the answer may be bcachefs.

ok, list here bcachefs patches which went into 4.16

[pal666]

Yeah, it's definitely past time for linux filesystem developers to get over BTRFS and start something new. Redhat may not be on the right track, so the kernels filesystem devs need to get crackin'. And soon.

so, are you going to show how to do it properly, or you will limit yourself to issuing orders to linux filesystem developers?

[duby229]

so, are you going to show how to do it properly, or you will limit yourself to issuing orders to linux filesystem developers?

Well, I suppose you can consider common sense an order I guess.

[pal666]

Of course, because that's where it's already proven to be perpetually stuck.

what fs with comparable featureset was developed faster? though nobody is going to stop you, you can start developing your magic fs right now. or join bcachefs circus

[pal666]

Well, I suppose you can consider common sense an order I guess.

since your sense is common, right now most linux fs devs are busy executing your suggestion, right?

[duby229]

since your sense is common, right now most linux fs devs are busy executing your suggestion, right?

I sure do hope so.

[pal666]

Faster at rebuilding perhaps? OTOH raid5/6 has significantly faster RW speed. You can easily achieve throughput such as 500 MB/s with spinning disks and RAID5. It's because you can do independent reads and writes of different blocks using multiple disks. On RAID-1 read speed has a theoretical max of 2x disk speed (assuming the file system can do checksums for blocks independently). On RAID-5 it's N-1, where N is the number of disks.

your math is wrong. raid1 can read all N disks in parallel. though btrfs didn't do that in the past, it was supposed to be fixed. but write on raid5 is read-modify-write

[pal666]

I sure do hope so.

oh, you were right, here is evidence https://www.youtube.com/watch?v=3wbyRTW8fNQ

[pal666]

Having 10 disks in RAID-1 is just dumb.

disks are cheap and it brings both redundancy and speed compared to 5 disk raid0

[gbcox]

What's the status of bcachefs? Is that just faith or you actually saw/tested something promising beyond some words on a Patreon page?

Do a quick Google search - or simply go back and review previous Phoronix articles concerning bcachefs and btrfs.