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List:       opensuse
Subject:    Re: [opensuse] repository metatdata download times
From:       Christoph Feck <christoph () maxiom ! de>
Date:       2016-12-06 22:06:27
Message-ID: 0c497cb6-2463-f7c1-2f15-f22bcb9e3403 () maxiom ! de
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On 06.12.2016 21:20, Carlos E. R. wrote:
> On 2016-12-06 20:50, Dave Howorth wrote:
>> On Tue, 6 Dec 2016 14:23:05 +0100
>> "Carlos E. R." <> wrote:
>>
>>> On 2016-12-06 00:54, Dave Howorth wrote:
>>>> When I run software update, it says it is updating the repositories
>>>> and this takes some time (seemingly a long time). Tonight I noticed
>>>> that it claims to be downloading at over 600 k(something)/second.
>>>> That seems to me to be sufficiently fast that the changes in the
>>>> repositories since the last time I donloaded them (yesterday)
>>>> should take almost no time.
>>>
>>> It doesn't download the "changes", it downloads some big files, fully.
>>
>> Exactly. My question is why? (Or WTF in modern parlance)
>
> How exactly would you download the changes?
>
> Please define the method and data structures that you propose in detail.

- sort the metadata file by modification date (newest entry at the 
beginning of the file) on the server

- when downloading, the client can optionally indicate the date of the 
last retrival

- the server will cut the file at the date point the client indicated

 > Hint: it is not that simple.
 >

What am I missing?


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