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From: Stefan Hajnoczi <stefanha@redhat.com>
To: David Edmondson <david.edmondson@oracle.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Fam Zheng <fam@euphon.net>,
	qemu-block@nongnu.org, Markus Armbruster <armbru@redhat.com>,
	qemu-devel@nongnu.org, Max Reitz <mreitz@redhat.com>
Subject: Re: [RFC PATCH 0/9] block/curl: Add caching of data downloaded from the remote server
Date: Wed, 19 Aug 2020 15:11:37 +0100	[thread overview]
Message-ID: <20200819141137.GC366841@stefanha-x1.localdomain> (raw)
In-Reply-To: <20200818110845.3825105-1-david.edmondson@oracle.com>

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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?

Thanks,
Stefan

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  parent reply	other threads:[~2020-08-19 14:14 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-18 11:08 [RFC PATCH 0/9] block/curl: Add caching of data downloaded from the remote server David Edmondson
2020-08-18 11:08 ` [RFC PATCH 1/9] block/curl: Add an 'offset' parameter, affecting all range requests David Edmondson
2020-08-18 11:08 ` [RFC PATCH 2/9] block/curl: Remove readahead support David Edmondson
2020-08-18 11:08 ` [RFC PATCH 3/9] block/curl: Tracing David Edmondson
2020-08-18 11:08 ` [RFC PATCH 4/9] block/curl: Perform IO in fixed size chunks David Edmondson
2020-08-18 11:08 ` [RFC PATCH 5/9] block/curl: Allow the blocksize to be specified by the user David Edmondson
2020-08-24 13:19   ` Markus Armbruster
2020-08-24 14:21     ` David Edmondson
2020-08-18 11:08 ` [RFC PATCH 6/9] block/curl: Cache downloaded blocks David Edmondson
2020-08-18 11:08 ` [RFC PATCH 7/9] block/curl: Allow the user to control the number of cache blocks David Edmondson
2020-08-18 11:08 ` [RFC PATCH 8/9] block/curl: Allow 16 sockets/ACB David Edmondson
2020-08-18 11:08 ` [RFC PATCH 9/9] block/curl: Add readahead support David Edmondson
2020-08-19 14:11 ` Stefan Hajnoczi [this message]
2020-08-19 14:19   ` [RFC PATCH 0/9] block/curl: Add caching of data downloaded from the remote server David Edmondson
2020-08-25 10:03     ` Max Reitz

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