Slow mount speeds on Backblaze B2

What is the problem you are having with rclone?

If I'm downloading or uploading by dragging files to or from the rclone mount, I'm getting a maximum of 30-50 Kbps, but if I use "rclone browser" downloading and uploading is much faster, I assume it uses copy instead of mount though. Is there anything I can do, or are those the speeds to be expected from B2?..

What is your rclone version (output from rclone version)

rclone v1.50.2

  • os/arch: linux/amd64
  • go version: go1.13.6

Which OS you are using and how many bits (eg Windows 7, 64 bit)

Linux Mint 64 bit

Which cloud storage system are you using? (eg Google Drive)

Backblaze B2

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone mount --vfs-cache-mode=full backb2:bucket-109283 /mnt/b2-bucket

The rclone config contents with secrets removed.

type = b2
account = xxx
key = xxx

hello and welcome to the forum,

please update rclone

if you are copying/moving files, not editing, perhaps try without vfs cache.

is this accurate? 30-50 Kbps as that is really slow.
what are the results of a
what speeds do you get with rclone browser?

wow thanks for such a quick response!
updated now:

rclone v1.53.3
- os/arch: linux/amd64
- go version: go1.15.5

is this accurate? 30-50 Kbps as that is really slow.

sadly yes, see:

what are the results of a speedtest

I get 598 down, 27 up in speedtest(.)net

what speeds do you get with rclone browser?

rclone browser uses rclone copy apparently, which supposedly is much better than mount according to the docs, but I get 30 down with rclone browser copy.

After the update I get now 7ish MB/sec with mount! :blush: thanks so much, though is there even more I could do to make it match rclones copy speeds?

sure, glad it is better..

not sure what you are comparing, upload or download?

1 Like

I'm comparing download currently

i do not use rclone mount for copying files, just for streaming media.
also, i do not use b2.

might try to increase --b2-chunk-size

I guess B2 only allows 200MB chunks?

b2: upload cutoff: 200M is less than chunk size 1G

getting that

post your command?

rclone mount --vfs-cache-mode=full --b2-chunk-size=1G backb2:bucket-109283 /mnt/b2-bucket

i would test, not using vfs cache for copying files.

if I remove the cache it drops back to 30kbps :frowning:

and that speed is for downloading?

not clear what the download speed is with rclone brower?

there are lots of posts about slow b2 speeds.
perhaps search for them and see if there is a solution.

I did try searching for B2 on the forum first, also google drive etc. since those are more common in mount threads - didn't seem much besides adding the cache either.

the speed is for downloading yes, though usually if download is good, upload is too, they are directly connected each time.

rclone browser download was 30 down, while rclone mount at the best was earlier 7 down.

i would try --vfs-cache-mode=minimal

That does 7-8 down too similar to "full", maybe it's just the limit that mount can do compared to copy?

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