NAS326 Transmission Low Download Speed

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GuRuNa
GuRuNa Posts: 2  Freshman Member
edited December 2019 in Personal Cloud Storage
I use nas326 to download bit torrent but max download speed around 30 MB/s. While I download same torrent on my desktop pc it at full speed of my internet speed 50 MB/s. Who has same problems like me? Or because it low ram of nas326.
Thanks. :)


#NAS_Dec_2019

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  • Mijzelf
    Mijzelf Posts: 2,638  Guru Member
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    Well, as you already guessed, your desktop pc has a lot more oomph, unless it is produced in the previous millennium.
    I don't think the memory will be a problem, but either the CPU or the disk(s). When you have ordinary disks, this will be the bottleneck. A torrent comes in in chunks of 512kB or 1024kb, which are randomly located in the file-to-be-received. Which means that at 30MB/sec the head has to be moved somewhere around 60 times a second. With a typical random access time of 12 msec, this means the heads are moving 720msec per second, which leaves 280msec to actually write that data. 30MB in 280msec equals 107MB/sec, which is about what you can expect from a mechanical disk.

    When your desktop does a better job, I guess it has an SSD.
  • GuRuNa
    GuRuNa Posts: 2  Freshman Member
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    Thanks. For your comment @Mijzelf
    My desktop pc more powerful more than nas326 and it had SSD.
    If I use Raid 0 it will help improve my download speed ?
  • Mijzelf
    Mijzelf Posts: 2,638  Guru Member
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    Raid0 can give a theoretical improvement, but in practice I doubt if you will find much difference. As your bandwidth is mainly crippled by the seektimes, the chunk size of your raid0 array should have to be a multitude of the torrent chunk size, and by aligned. In other cases the number of sequential seeks won't be less.

    A SSD might give a boost, but if you want to go that way, first check if the CPU has some cycles left when downloading at 30MB/sec. There is a page in the webinterface where you can see the CPU load. When the CPU is above 60%, don't expect to be able to get 50MB/sec.

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