[wolttam]

That’s not that different than CoW filesystems - there is no rule that files must map 1:1 to objects; you can (transparently) divide a file into smaller chunks to enable more fine grained edits.

[vbezhenar]

The most obvious approach seems to implement device blocks as S3 objects and use any existing file system on top of it.

[yencabulator]

S3 is notoriously miserable with small objects.

[otterley]

The unit of granularity for a CoW filesystem is a block, which is typically 4kB or smaller. The unit of granularity for S3 is the entire object or 5MB (minimum multipart upload size), whichever is smaller. The difference can be immense.

[direwolf20]

But this doesn't