I'm testing with another server and same problem.
I've defined in config file:
...
set mirror:no-empty-dirs yes;
set mirror:order "/*";
set mirror:parallel-directories yes;
set mirror:parallel-transfer-count 5;
set mirror:set-permissions no;
set mirror:use-pget-n 3;
....

But when I execute 'jobs -v 1' only I see 3 downloads:

[1] mirror Synchronicity 2015 LIMITED COMPLETE BLURAY-BAKED/  -- 8.0G/24G
(33%) 3.25 MiB/s
 \mirror `BDMV'  -- 8.0G/24G (33%) 3.25 MiB/s
  \mirror `BDMV/STREAM'  -- 8.0G/24G (33%) 3.25 MiB/s
   \transfer `BDMV/STREAM/00002.m2ts'
`00002.m2ts', se obtuvieron 4926432740 de 20894730240 (23%) 3.25M/s
falta:84m
   \chunk 0-6964910080
`00002.m2ts' en 1669761120 (7%) 1.14M/s falta:76m [Recibiendo datos]
   \chunk 13929820160-20894730239
`00002.m2ts' en 15502994980 (22%) 1.00M/s falta:84m [Recibiendo datos]
   \chunk 6964910080-13929820159
`00002.m2ts' en 8648406880 (24%) 1.11M/s falta:77m [Recibiendo datos]

In server side only there are 3 established connections:
  PID %CPU %MEM   TIME COMMAND
 7321  0.1  0.0   0:01 proftpd: xxxxx: RETR 00002.m2ts
 7584  0.1  0.0   0:01 proftpd: xxxxx: RETR 00002.m2ts
 7586  0.1  0.0   0:01 proftpd: xxxxx: RETR 00002.m2ts

I'm using lftp v4.7.1
-------------------------------------------------------------------------------

Another question is about the jobs command, the help says:
$ help jobs
Uso: jobs [-v] [<job_no...>]
List running jobs. -v means verbose, several -v can be specified.
If <job_no> is specified, only list a job with that number.

If I specify more than one "-v", should I see more info about that job?
Because actually it shows always the same info.

Regards.


2016-04-24 21:12 GMT+02:00 Juan Simón <deced...@gmail.com>:

> It's a weird problem. I don't know why it occurs. I've tested with 2 FTP
> servers: vsftpd and Pure-FTPd but it fails with both. It starts well but
> after a few minutes the download speed drops sharply.
> I've tested with another FTP servers near to my server but it fails with
> another error:
>
> $ lftp --norc ftp://ubuntu.mirrors.ovh.net -e "debug 5"
> lftp ubuntu.mirrors.ovh.net:~> ls
> ---- Connecting to ubuntu.mirrors.ovh.net (2001:41d0:1:7c8b::1) port 21
> **** connect(control_sock): Cannot assign requested address
> ls: Cannot assign requested address
>
> ​$ lftp --norc ftp://ftp.crihan.fr/releases/ -e "debug 5"
> cd: Cannot assign requested address
> lftp ftp.crihan.fr:~> ls
> ---- Connecting to ftp.crihan.fr (2001:660:7401:211::36) port 21
> **** connect(control_sock): Cannot assign requested address
> ls: Cannot assign requested address
> ​
> ​IPv6? I have disabled IPv6 totally in my system
> ​/router​
> :
>
> net.ipv6.conf.all.disable_ipv6 = 1
> net.ipv6.conf.default.disable_ipv6 = 1
> net.ipv6.conf.internet.disable_ipv6 = 1
> net.ipv6.conf.lo.disable_ipv6 = 1
> net.ipv6.conf.vten.disable_ipv6 = 1
>
> I can connect from the browser, gFTP and GNU ftp.
>
> My lftp config: http://pastebin.com/YqEJfLmR
>
> The debug log: http://pastebin.com/KLH3k9FZ
>
> I've seen the next line in debug: "AUTH TLS" and I have disabled SSL (I
> don't need it) with: "set ftp:ssl-allow no;" but it still shows those
> lines: http://pastebin.com/bmyLK0GY
>
> ​I have done many tests but I can not determine where the problem is. :-(
>
> Any idea?
> Regards.
>
>
> 2016-04-23 21:47 GMT+02:00 Alexander Lukyanov <lavv...@gmail.com>:
>
>> Please turn on debug and see the ftp protocol details, it may shed some
>> light.
>>
>> сб, 23 апр. 2016 г. в 17:28, Juan Simón <deced...@gmail.com>:
>>
>>> With lftp v4.6.5 is fails too. The curious thing is that it works well
>>> for a while at start. I've tested with pget and same problem.
>>> I have defined in config file:
>>> ...
>>> set pget:default-n 6;
>>> set pget:min-chunk-size 4M;
>>> set pget:save-status 2s;
>>> ...
>>>
>>> But it shows only 2:
>>> ...
>>> $ jobs -vv
>>>  [1] pget -c Munich (2005) (Ed.USA) [Remux AVC 1080p DTS-HD 5.1 Esp-Eng
>>> Subs][Cachotronco][GrupoHDS].mkv  -- 13.1 KiB/s
>>> ftp://monsi@sys/%2Ftorrent-descargas/pelis
>>> `Munich (2005) (Ed.USA) [Remux AVC 1080p DTS-HD 5.1 Esp-Eng
>>> Subs][Cachotronco][GrupoHDS].mkv', se obtuvieron 36110696993 de 43319521696
>>> (83%) 13.1K/s falta:6d1h
>>>   \chunk 14439840568-21659760849
>>> `Munich (2005) (Ed.USA) [Remux AVC 1080p DTS-HD 5.1 Esp-Eng
>>> Subs][Cachotronco][GrupoHDS].mkv' en 14450936147 (0%) 13.1K/s falta:6d1h
>>> [Recibiendo datos]
>>>
>>> And this is the connections list with my server:
>>> $ ss -ta | grep -i IP-server
>>> ESTAB      0      0      192.168.1.2:55947
>>>  IP-server:13439
>>> ESTAB      0      0      192.168.1.2:59774
>>>  IP-server:zoomcp
>>> CLOSE-WAIT 0      0      192.168.1.2:58064                IP-server:ftp
>>>
>>> ESTAB      0      0      192.168.1.2:58072                IP-server:ftp
>>>
>>> ESTAB      4590008 0      192.168.1.2:45404
>>>  IP-server:30142
>>> ...
>>>
>>> Any help?
>>> Thanks.
>>>
>>> 2016-04-23 15:54 GMT+02:00 Juan Simón <deced...@gmail.com>:
>>>
>>>> lftp v4.7.1
>>>> Arch Linux 64 bits
>>>>
>>>> I have defined in my rc config file:
>>>> ...
>>>> set mirror:exclude-regex "^.+\.[pP][aA][rR][tT]$|^.+\.[uU][rR][lL]$";
>>>> set mirror:no-empty-dirs yes;
>>>> set mirror:order "/*";
>>>> set mirror:parallel-directories yes;
>>>> set mirror:parallel-transfer-count 2;
>>>> set mirror:set-permissions no;
>>>> set mirror:use-pget-n 6;
>>>> ....
>>>>
>>>> But I have download a folder with mirror and only there are 2 threads:
>>>>
>>>> $ jobs -vvv
>>>> ....
>>>> [1] mirror STAR_WARS_EPISODE_IV_THE_FORCE_AWAKENS/  -- 42G/42G (99%)
>>>> 27.0 KiB/s
>>>>   \mirror `BDMV'  -- 42G/42G (99%) 27.0 KiB/s
>>>>    \mirror `BDMV/STREAM'  -- 42G/42G (99%) 27.0 KiB/s
>>>>     \transfer `BDMV/STREAM/00155.m2ts'
>>>> `00155.m2ts', se obtuvieron 602416339 de 635123712 (94%) 27.0K/s
>>>> falta:20m
>>>>     \chunk 423415808-529269759
>>>> `00155.m2ts' en 510521379 (82%) 19.5K/s falta:18m [Recibiendo datos]
>>>>     \chunk 211707904-317561855
>>>> `00155.m2ts' en 303602864 (86%) 7.5K/s falta:20m [Recibiendo datos]
>>>>
>>>> I've noticed this because the download speed is very slow. Generally
>>>> the download speed is ~323mbps and today is ~300kbps. I have tested with
>>>> iperf between my FTP server and the link is right.
>>>> I'll test it with lftp v4.6.5.
>>>>
>>>> Regards.
>>>>
>>>
>>> _______________________________________________
>>> lftp mailing list
>>> lftp@uniyar.ac.ru
>>> http://univ.uniyar.ac.ru/mailman/listinfo/lftp
>>>
>>
>
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