Testing for new vfs cache mode features

[ncw (Nick Craig-Wood)]

@tcf909

It looks like you are storing meta by way of Item entries in go. Didn't see how this translated to disk storage though.

I'm storing them on disk in a parallel directory structure as JSON blobs, so in ~/.cache/rclone/vfs you'll find the data and ~/.cache/rclone/vfsMeta you'll find the metadata.

@tcf909

Are you going to make the vfs meta (chunks and/or internal db) available to be stored on separate a storage medium? --vfs-cache-db /nvme --vfs-cache-files /hdd

You can use --cache-dir to direct where you want the cache to go. There isn't a separate setting for the metadata - it is very small though.

@tcf909

Also, will you be allowing parallel uploads? --vfs-cache-upload-limit 99

The writeback cache allows --transfers uploads at once.

@tcf909

Also, will you be allowing a separate upload bw limit? --vfs-cache-upload-bwlimit 99M

I think that is a separate issue (I'm pretty sure there is one) for a --bwlimit and a --txbwlimit and --rxbwlimit flags. Or make the bwlimit flag take some more funky parameters.