File data transfer of FreeBSD faster than Linux !

[Spartrekus]

Hello,

I noticed the faster data transfert of FreeBSD faster than Linux, by means of SSH (scp).
A data cdrom (ISO) or anything goes much faster ! scp gives clearly faster for freebsd (20 to 40pct faster).

- Server machine: Raspberry. SDCard with Linux, SDCard with FreeBSD, same server, same everything except OS (Linux and FreeBSD). The ISO data on server is on SDCard.
Same pc/rpi server, same cables, same files.
- Client: remained the same for the testing.
- Summary: Only the SD card on server was changed to make the test perfectly comparable!

Is there anything to do with SCP of freebsd or it could be other reasons?

 

[achix]

I had the exact opposite experience. I guess it takes some tuning either way.

 

[wolffnx]

Hello,

I noticed the faster data transfert of FreeBSD faster than Linux, by means of SSH (scp).
A data cdrom (ISO) or anything goes much faster ! scp gives clearly faster for freebsd (20 to 40pct faster).

same pc/rpi server, same cables, same files.

Is there anything to do with SCP of freebsd or it could be other reasons?

Are you using ZFS?

 

[Spartrekus]

I actually use on FreeBSD a USB portable harddisk, made with newfs for UFS2. It runs very well (machine: RPI3b).

I notice the above post above linux vs freebsd. Interesting... no idea if it comes from tuneing.

 

[giahung1997]

I had the exact opposite experience. I guess it takes some tuning either way.

Me, too On my 120G WD Linux Ext4 is much faster a tuned UFS

 

[Crivens]

I think this is about network performance? So the file system should not matter?

 

[ralphbsz]

Before I take an educated guess whether the cause is the network stack, the tcp implementation, or the file system, we need a lot more detail about what the actual experiment was.

 

[wolffnx]

I think this is about network performance? So the file system should not matter?

maybe if the filesystem was ZFS, for the compression

 

[Crivens]

When the server is the same, the server file system is an invariant here. So - no. ZFS on the rpi should not matter.

 

[giahung1997]

Before I take an educated guess whether the cause is the network stack, the tcp implementation, or the file system, we need a lot more detail about what the actual experiment was.

You're right. I'm agreed with you.

 

[Terry_Kennedy]

Server machine: Raspberry. SDCard with Linux, SDCard with FreeBSD, same server, same everything except OS (Linux and FreeBSD). The ISO data on server is on SDCard.
Same pc/rpi server, same cables, same files.

Exact same brand / model of SD card? There is a huge variation in SD/SDHC/SDXC speeds, particularly with the older / lower capacity cards.

 

[Spartrekus]

the card was exactly the same. I bought very same: scandisk 16mb, same day, same item, same time.