Re: [Cppcms-users] Concurrent download question

[Shiv S. D. <shi...@gm...>]

The problem is that individual file will have rare downloads(usually
one file will be downloaded once a month or two)
and no. of downloads are large. So caching will not help.
They have to be read asynchronously and concurrently. I am not sure
that should I create booster::io::service or cppcms::service. Also,
I find it hard to create booster::io::service as its example is not
exhaustive. Even if I create booster::io::service the filesystem
calls may block. I will be using GlusterFS for storage. But that is
something not within CppCMS's domain so I will take care of
that.

Individual sizes will be ~200-300KB and few can be as large as ~20MB.
Very rarely they can also be huge say ~1GB or more. I care about the small
ones not the large ones. Also, how can I stream very large files i.e. serve
as they are read in chunks before loading entirely in memory and
support resumption of download in case of interruption.

If you could provide a small example that would be a mighty help.

On Sun, Mar 27, 2016 at 12:21 PM, Artyom Beilis <art...@gm...> wrote:
>> The files are on filesystem. How should I do IO to ensure maximum
>> concurrency? Is there any example available for this? I would be
>> grateful for any help.
>>
>
> Can you explain what exactly the issue you are having or problem you expect?
>
> In general CppCMS saves the files if they are big enough
> using file system otherwise keeps them in memory
> you can control the thresholds via config or dynamically in CppCMS 1.2.
>
> So what exactly the problem you expect?
>
> Artyom
>
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-- 
Respect,
Shiv Shankar Dayal