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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Linux file transfer speed bottlenecks? (midwest.social)

submitted 9 months ago* (last edited 9 months ago) by archomrade@midwest.social to c/linux@lemmy.ml

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I'm currently watching the progress of a 4tB rsync file transfer, and i'm curious why the speeds are less than the theoretical read/write maximum speeds of the drives involved with the transfer. I know there's a lot that can effect transfer speeds, so I guess i'm not asking why my transfer itself isn't going faster. I'm more just curious what the bottlenecks could be typically?

Assuming a file transfer between 2 physical drives, and:

Both drives are internal SATA III drives with ~~5.0GB/s~~ ~~5.0Gb/s read/write~~ 210Mb/s (this was the mistake: I was reading the sata III protocol speed as the disk speed)
files are being transferred using a simple rsync command
there are no other processes running

What would be the likely bottlenecks? Could the motherboard/processor likely limit the speed? The available memory? Or the file structure of the files themselves (whether they are fragmented on the volumes or not)?

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[–] Quazatron@lemmy.world 4 points 9 months ago

Rsync itself may be a bottleneck. Have you compared it to cp command, for instance?