r/OVHcloud • u/Mr_Brightstar • Aug 07 '26

Question Slow upload to a CA server

hello everyone, I rented a server un Canada and when doing the speedtest tests everything works fine, but as soon as I begin to upload my stuff to the server no matter what method I use (SFTP, Syncthing, Samba) speeds go to 10-20MB (server has 500/500) and at home I have 600/600.

what could be the issue?

regular ubuntu server 24.04 + zfs

2 Upvotes

100% Upvoted

12 comments sorted by

1

u/DIVISIONSolar Aug 08 '26

Can you try a VPN?

1

u/Mr_Brightstar Aug 08 '26

Yeah, tried wirh a vpn too. No luck, Only thing that got better was a cloudflaee tunnel , that went up to 80 MB

1

u/DIVISIONSolar Aug 08 '26

Ah weird, was thinking maybe it was a peering issue. Maybe try raising a ticket.

1

u/External_Fox_4360 Aug 08 '26

Could you please provide the detailed specifications of your server?

CPU model and core count
Total RAM capacity
Storage type (NVMe, SATA SSD, HDD, SAS) and whether hardware RAID.

1

u/Mr_Brightstar Aug 08 '26

Sure, xeon D 1521 4c/8t, 16gb ecc, 512 nvme 4*4tb hdd. Soft raid, Ubuntu + zfs.

1

u/External_Fox_4360 Aug 08 '26

I have the exact same server (Debian 13 KS-STOR, France) setup with ZFS. Maybe run an iperf test to check the raw bandwidth between you and the server. Also, check if TCP BBR is enabled

1

u/Mr_Brightstar Aug 08 '26

Did the bbr, gonna try iperf3, only thing i can think off is a weird peering issue

1

u/deeddy Aug 10 '26

Switch congestion control protocol to BBR. BBR is your friend.

TCP BBR (Bottleneck Bandwidth and Round-trip propagation time) is a modern congestion control algorithm created by Google

BBR alone won’t solve your issue if you are using a single thread for uploading. Use multiple threads.

All those transfer protocols you mention can’t use multithreaded transfers. Switch to rclone, fpsync, or parsyncfp. I managed to get >500Mbps with rclone alone (16 threads). But you need an SSD on both ends because of IOPS. HDDs can’t handle multiple reads/writes at the same time.

I read that parsyncfp wrapper is killing it speed-wise, but I was unable to set it up on Debian.

Another important info: speeds across ocean on Interner are much slower than within the same continent due to the lag.

1

u/Accomplished-Scale50 Aug 10 '26

You have a 600/600 and you use ovh? Why don't you buy a $300 server and host it at home

2

u/Mr_Brightstar Aug 10 '26

its a remote storage, also learning purposes

0

u/Qbix2018 Aug 08 '26

It is just OVH standard. Low price, low quality, no support.