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Thu, 7 Nov 2019 15:27:23 +0000 (UTC) Date: Thu, 7 Nov 2019 16:27:22 +0100 From: Kevin Wolf To: Eric Blake Subject: Re: [RFC PATCH 06/18] qemu-storage-daemon: Add --nbd-server option Message-ID: <20191107152722.GD5007@linux.fritz.box> References: <20191017130204.16131-1-kwolf@redhat.com> <20191017130204.16131-7-kwolf@redhat.com> <25f74aa7-0856-a396-fb98-f6b7a337b965@redhat.com> <1bcb5419-183e-fd7b-e53c-fbb315f29703@redhat.com> <20191107083335.GA5007@linux.fritz.box> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: pMVvjHARMreT9WCjICx7Ew-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, pkrempa@redhat.com, armbru@redhat.com, qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Am 07.11.2019 um 14:45 hat Eric Blake geschrieben: > 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 i= t > > wouldn't contain only NBD devices, but also vhost-user, FUSE, etc. > > exports. > >=20 > > 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)= . >=20 > We want that (the ability to run multiple parallel NBD servers) anyway, t= o > allow parallel incremental backups from different points in time to > different clients. Can't you already have multiple exports on a single NBD server for multiple clients today? Or do you need a different server configuration for each client? Kevin