Hello, i am having a problem with my Orange Pi the download speed is very slow. In Deluge and by wget i get normal DL speed around 9Mb/s (i have a 10Mb internet). But in JDownloader and in builit-in web browser i get around 100Kb/s. Any idea how to solve this issue? I want to make a download server using OPi but this issue is stopping me from doing that.
I am running the newest Armbian Desktop

Did you already check random IO of your SD card? Please do the following and report back with results:

cd $HOME
iozone -e -I -a -s 100M -r 4k -r 16k -r 32k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2

 
        Include fsync in write timing
        O_DIRECT feature enabled
        Auto Mode
        File size set to 102400 kB
        Record Size 4 kB
        Record Size 16 kB
        Record Size 32 kB
        Record Size 512 kB
        Record Size 1024 kB
        Record Size 16384 kB
        Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 32k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
        Output is in kBytes/sec
        Time Resolution = 0.000001 seconds.
        Processor cache size set to 1024 kBytes.
        Processor cache line size set to 32 bytes.
        File stride size set to 17 * record size.
                                                              random    random     bkwd    record    stride
              kB  reclen    write  rewrite    read    reread    read     write     read   rewrite      read   fwrite frewrite    fread  freread
          102400       4      799      822     4627     4636     4654      119
          102400      16     3818     3689    11008    10946    10967      105
          102400      32     4919     4977    15036    15037    15009      103
          102400     512     7949     7745    21960    22255    22252      933
          102400    1024     7742     8101    22198    22269    22277     1843
          102400   16384     8530     9337    22487    21296    22483     7540
 
iozone test complete.

EDIT:

I've also installed pyLoad and the speed seems fine.

Please immediately trash this card since it's terribly slow and invest 5 - 10USD for up to 10x faster.

 

http://forum.armbian.com/index.php/topic/954-sd-card-performance/

 

For example:

5 USD

http://www.dx.com/p/genuine-samsung-micro-sd-tf-memory-card-black-orange-16gb-class-10-195361

 

8 USD

http://www.dx.com/p/genuine-samsung-32gb-microsdhc-evo-class-10-uhs-i-memory-card-mb-mp32d-852323434

Edited June 22, 201610 yr by Igor
example

invest 5 - 10USD for up to 10x faster.

 

 

Well, a Samsung EVO with 32 or 64 GB capacity will be 30 times faster

 

@Icarus: the problem is that some tools write small chunks of data and if you then use a storage media that shows horribly slow random IO write performance, the 'disk' becomes the bottleneck. Other download tools access the filesystem differently and in this case your network will limit download speeds.

 

As Igor suggested: the card you're using is inappropriate for SBC usage. In case you're planning to attach USB storage anyway, simply check using iozone and in case you keep your card, simply use our nand_sata_install.sh script to move your OS installation to USB storage if performance is ok there.

How to check USB drive with iozone? Should i just do "cd" to a place where usb drive is mounted and run iozone there? Sorry im new to armbian and i don't how how these things work.
I've also tried to save directly to USB disk but the result is the same.

Should i just do "cd" to a place where usb drive is mounted and run iozone there?

 

Exactly

Include fsync in write timing
        O_DIRECT feature enabled

        Auto Mode

        File size set to 102400 kB

        Record Size 4 kB

        Record Size 16 kB

        Record Size 32 kB

        Record Size 512 kB

        Record Size 1024 kB

        Record Size 16384 kB

        Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 32k -r 512k - r 1024k -r 16384k -i 0 -i 1 -i 2

        Output is in kBytes/sec

        Time Resolution = 0.000001 seconds.

        Processor cache size set to 1024 kBytes.

        Processor cache line size set to 32 bytes.

        File stride size set to 17 * record size.

                                                              random    random     bkwd    record    stride

              kB  reclen    write  rewrite    read    reread    read     write     read   rewrite    read   fwrite frewrite    fread  freread

          102400       4    12612     9825    40949    45097    44250     7010

          102400      16    11063    11158   105539   105641   103924     6875

          102400      32     9798    14905    98915   131511   130070     8967

          102400     512    11545    12429   153199   154047   154003     9447

          102400    1024    10976    11166   112907   152358   152901     9317

          102400   16384     9519    10792   152922   153645   153781    11342
iozone test complete.

This test was quicker so i think these results are ok. So i can move my OS to USB disk, is there any tutorial how to do this?

https://github.com/igorpecovnik/lib/blob/master/documentation/user-faq.md#how-to-install-to-emmc-nand-sata--usb

 

(Anyone an idea why none of our users finds the documentation? This is something we clearly have to improve)

Thank you very much! Everything now works like a harm and the download speeds are normal!

Since this is not the first time this issue pops up maybe it's worth adding stuff like this to a FAQ (no one reads later  )

 

Quite a few programs really suffer from slow random IO -- especially writes (not only this downloader stuff but also browsers like Firefox that have many SQlite databases open and try to write to them in 32K chunks or even whole 'operating systems' like Android). And since users tend to try out new OS images with crappy SD cards lying around their first experience with Armbian might be 'Huh? Internet slow as hell! Armbian sucks!' (blaming software for 100 percent hardware related problems)

Damn... Again something is fucked up, a the beginning it was fine but later it got slower again. Is it again SD card bottleneck? iozone benchmark is taking forever...

EDIT:

I've formatted my pendrive and installed OS from scratch. And it seems that pendrive is getting slower after filling it with over 1GB of data (so after moving OS on it)... fml.

Before:

        Run began: Wed Jun 22 20:26:54 2016
        Include fsync in write timing
        O_DIRECT feature enabled
        Auto Mode
        File size set to 102400 kB
        Record Size 4 kB
        Record Size 16 kB
        Record Size 32 kB
        Record Size 512 kB
        Record Size 1024 kB
        Record Size 16384 kB
        Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 32k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
        Output is in kBytes/sec
        Time Resolution = 0.000001 seconds.
        Processor cache size set to 1024 kBytes.
        Processor cache line size set to 32 bytes.
        File stride size set to 17 * record size.
                                                              random    random     bkwd    record    stride
              kB  reclen    write  rewrite    read    reread    read     write     read   rewrite      read   fwrite frewrite    fread  freread
          102400       4     5128     2184    42939    45273    44219     6221
          102400      16    14258    13214   105857   107476   104976     7154
          102400      32    13884    14508   114006   131381   129819     8208
          102400     512    11555    20252   151983   153029   152443    10022
          102400    1024    16551    10819   150017   152989   153043    10097
          102400   16384    12763    10231   151214   153252   153523    11114

After (reduced size to 10M taking ages in 100M):

Run began: Wed Jun 22 21:23:37 2016

        Include fsync in write timing
        O_DIRECT feature enabled
        Auto Mode
        File size set to 10240 kB
        Record Size 4 kB
        Record Size 16 kB
        Record Size 32 kB
        Record Size 512 kB
        Record Size 1024 kB
        Record Size 16384 kB
        Command line used: iozone -e -I -a -s 10M -r 4k -r 16k -r 32k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
        Output is in kBytes/sec
        Time Resolution = 0.000001 seconds.
        Processor cache size set to 1024 kBytes.
        Processor cache line size set to 32 bytes.
        File stride size set to 17 * record size.
                                                              random    random     bkwd    record    stride
              kB  reclen    write  rewrite    read    reread    read     write     read   rewrite      read   fwrite frewrite    fread  freread
           10240       4     2378     3446     7710     7765     2220      129
           10240      16    12697    12543    12615    12652     6399      420
           10240      32     4881    11743    12071    12623     8411      487
           10240     512    12257    12111    12684    12688    12280    12080
           10240    1024     4546     4543    12084    12602    12422     8513

iozone test complete.

So it seems i need to buy a proper SD card.
Thank you @Igor for giving me that link to thread with SD cards i will have look into that

I've tested pendrive with CrystalDiskMark (2GB test) random 4k write is: 0,232MB So its 100% pendrive fault