Rclone mount download performance on synology

[tehspaceg (Geran Smith)]

What is the problem you are having with rclone?

When running my rclone mount on an sftp backend and download files, I am only receiving about 5 MB/s downspeed. When downloading the file via SFTP directly (without a mount), I am seeing 15 MB/s or more.

I'd like to know if there is a cache setting that I need to modify. I am generally downloading 1 GB or larger files using rclone. Very little write operations as I am syncing from a remote system.

This is running on a Synology 920+ with 8 GB of RAM.

Run the command 'rclone version' and share the full output of the command.

$ rclone version
rclone v1.58.0
- os/version: unknown
- os/kernel: 4.4.180+ (x86_64)
- os/type: linux
- os/arch: amd64
- go/version: go1.17.8
- go/linking: static
- go/tags: none

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

SFTP

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

rclone mount -v --stats 1m --stats-one-line remote:/path/to/folder /volume1/Media/mount --allow-other --dir-cache-time 5m --vfs-cache-mode full --cache-dir /volume1/Media/mount/.cache --config /volume1/user/.config/rclone.conf

The rclone config contents with secrets removed.

[remote]
type = sftp
host = IP_ADDRESS
user = user
port = 11111
key_file = /volume1/user/.config/cert.pem
use_insecure_cipher = true
key_file_pass = SECRET
md5sum_command = md5sum
sha1sum_command = sha1sum```

[asdffdsa (jojothehumanmonkey)]

hello and welcome to the forum,

fwiw, might test the following setup
for downloads only, can use
--- --read-only
--- not use the rclone vfs file cache, the default value of --vfs-cache-mode=off

i could be wrong, that
with rclone mount, downloads a single file at a time.
whereas rclone copy, downloads multiple files at the same time.

[tehspaceg (Geran Smith)]

Let me give it a go with the cache off. I do SOME writes to the remote, but not a lot.

rclone mount definitely seems to be downloading one file at a time.

I am using sonarr, so I may have to try and see if I can trigger an rclone script instead of relying on a mount and remote.

Edit: Looks like disabling cache didn't help at all. I did do a test of rclone copy and I am getting much closer to the expected speeds.

[ncw (Nick Craig-Wood)]

How are you testing the download speed via the mount?

Note that mounts usually only do single threaded download whereas rclone copy will do multithreaded downloads.

[tehspaceg (Geran Smith)]

I was just monitoring the speed of downloading a large file that was done on the mount.

It sounds like mount might not be the most efficient way. I will tinker with sonarr and see if I can disable import and just use a copy or something. Thanks for the help!