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Re: [RFC PATCH 06/18] qemu-storage-daemon: Add --nbd-server option

From: Eric Blake
Subject: Re: [RFC PATCH 06/18] qemu-storage-daemon: Add --nbd-server option
Date: Thu, 7 Nov 2019 07:45:45 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1

On 11/7/19 2:33 AM, Kevin Wolf wrote:

As a replacement nbd-server-add, I envisioned adding something like a
block-export-add, which would work the way that --export already does.
It would also come with query-block-exports and block-export-del, and it
wouldn't contain only NBD devices, but also vhost-user, FUSE, etc.

Now I'm wondering if the same would make sense for nbd-server-start.
Maybe an API change would even allow us to start multiple NBD servers
(e.g. listening on different IP addresses or using different tls-creds).

We want that (the ability to run multiple parallel NBD servers) anyway, to allow parallel incremental backups from different points in time to different clients.

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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