April 26, 201610 yr Hi When I copy files between folders on my unraid system I get slow and irregular transfer speeds. Here's an example - I copy a folder (from windows explorer) containing 2 files from folder "torrents" to "movie", both folders are located on the same user share /mnt/user/. When tranferring the speed can start at 80 MB/s for a few seconds but then drops to 8-10 MB/s for like 10-15 seconds and then goes up again for a few seconds as shown on image below. Do you any of you have any idea why this is happening, I'm thinking this can't be a hardware issue.
April 26, 201610 yr Hi When I copy files between folders on my unraid system I get slow and irregular transfer speeds. Here's an example - I copy a folder (from windows explorer) containing 2 files from folder "torrents" to "movie", both folders are located on the same user share /mnt/user/. When tranferring the speed can start at 80 MB/s for a few seconds but then drops to 8-10 MB/s for like 10-15 seconds and then goes up again for a few seconds as shown on image below. Do you any of you have any idea why this is happening, I'm thinking this can't be a hardware issue. If they were within the same share, it would be instantaneous. They're going to be within different shares, so windows reads the file and writes it as it goes. The jumping up and down in speed is because unRaid caches writes in memory and when its full writes it out to the drive and so on.
April 26, 201610 yr Author If they were within the same share, it would be instantaneous. They're going to be within different shares, so windows reads the file and writes it as it goes. The jumping up and down in speed is because unRaid caches writes in memory and when its full writes it out to the drive and so on. Hello Squid - thanks for your reply. The folder is copied respectively as followed: From /mnt/user/Downloads/torrents# To /mnt/user/Media/movies# Shouldn't it be more or less instantaneous as you say? Why isn't the folder not written directly to the destination folder ? In other words is it possible to improve the write speed between folders and if yes how?
April 26, 201610 yr If they were within the same share, it would be instantaneous. They're going to be within different shares, so windows reads the file and writes it as it goes. The jumping up and down in speed is because unRaid caches writes in memory and when its full writes it out to the drive and so on. Hello Squid - thanks for your reply. The folder is copied respectively as followed: From /mnt/user/Downloads/torrents# To /mnt/user/Media/movies# Shouldn't it be more or less instantaneous as you say? Why isn't the folder not written directly to the destination folder ? In other words is it possible to improve the write speed between folders and if yes how? Not at all. /mnt/user/Downloads and /mnt/user/Media are completely different shares and every single OS (Mac / Windows / etc) will all do a copy, write, delete process to move the folders between them. The slowdown is even more pronounced if you have a spinner cache drive, the source is on the cache, and the destination also winds up on the cache due to the thrashing of the hard drive. Its not an unRaid issue, but is just how every single OS operates with different mount points (think of a mount point like a drive letter in windows) over a network connection - the remote system has no clue about which drive the mounts are physically on so it does the safe process.
April 26, 201610 yr Author Not at all. /mnt/user/Downloads and /mnt/user/Media are completely different shares and every single OS (Mac / Windows / etc) will all do a copy, write, delete process to move the folders between them. The slowdown is even more pronounced if you have a spinner cache drive, the source is on the cache, and the destination also winds up on the cache due to the thrashing of the hard drive. Its not an unRaid issue, but is just how every single OS operates with different mount points (think of a mount point like a drive letter in windows) over a network connection - the remote system has no clue about which drive the mounts are physically on so it does the safe process. Would it be the same if I was using FTP transfer instead? How would you do it?
April 26, 201610 yr I have the docker apps do the moving automatically. Doesn't particularly matter to me if it takes a couple extra minutes to move the file into its final place. On the occasions when I do have to manually move stuff from one share to another, if its just a couple of files then I'll do it over the network with somewhat similar results to you. If I'm moving tons and tons of stuff, then I'll use the Dolphin docker app (or even mc at the command prompt) to do it faster.
April 26, 201610 yr Ok, will take a look at that dolphin docker app. What is mc? midnight commander. Text based GUI file manager. dolphin is easier to use when you're used to a windows / mac environment
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