> On 26 Mar 2017, at 11:48, Wouter Verhelst <w...@uter.be> wrote: > > Hi Nivin, > > On Wed, Mar 22, 2017 at 12:07:19PM -0700, Nivin Lawrence wrote: >> I was unable to find a lot of details on NBD over UDP, could you please >> let me know if this is supported (for read/write). > > It isn't; NBD relies on the TCP sequencing and checksumming far too much > currently. > >> The objective is to achieve >> the same functionality of server restart by keeping the server stateless so >> that if the server has to be restarted, you could still have the clients >> continue, which does not look like is the case with TCP. Possibly NBD has >> more >> reasons than just TCP to support server restart, if so, could you please >> list a >> few. >> >> If not UDP, is there an option to restart the NBD server without >> impacting >> the clients? > > nbd-client has a "-persist" option which is meant to support connection > restart when necessary, but I'm not sure how well it works currently > (you'd have to check).
Also NBD as a protocol currently fundamentally relies on a certain amount of connection state, as negotiated during the negotiation phase. I think the stateless/non-stateless question is not necessarily linked with UDP/TCP (as demonstrated by the fact that NFSv4 runs over both happily). -- Alex Bligh ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Nbd-general mailing list Nbd-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nbd-general
