Re: [RFC PATCH 0/9] block/curl: Add caching of data downloaded from the remote server

[David Edmondson]

On Wednesday, 2020-08-19 at 15:11:37 +01, Stefan Hajnoczi wrote:

> On Tue, Aug 18, 2020 at 12:08:36PM +0100, David Edmondson wrote:
>> When using qemu-img to convert an image that is hosted on an HTTP
>> server to some faster local (or pseudo-local) storage, the overall
>> performance can be improved by reading data from the HTTP server in
>> larger blocks and by caching and re-using blocks already read. This
>> set of patches implements both of these, and adds a further patch
>> allowing an offset to be added to all of the HTTP requests.
>
> Hi David,
> Thanks for posting this! Kevin and Max are the maintainers in this area,
> but I wanted to ask an initial question:
>
> Is caching curl-specific or could this be implemented as a block filter
> driver so that it can be stacked on top of other network protocols too?

This implementation is curl specific, as you probably surmised. I will
look at implementing something similar as a block filter.

dme.
-- 
Facts don't do what I want them to.