Hi! > > Yes. I think you should be able to use about 70% of the bandwidth (I can > get > > about 32Mb/s out of 45Mb/s (T3) with 100ms latency). You might need to > > increase your TCP window size and/or change the I/O scheduler you're using > > for NBD. Switch to "deadline" scheduler if you're not using that one > already.
Some more background information: The used filesystem is squashfs with blocksize of 64kByte. The read-ahead of NBD is set to 128kByte (seems to be the optimal value there). I checked the thoughput of the rootfs (squashfs on NBD) for a booting system. While I got up to 14000kbit/s for an ftp download (same server), the nbd bandwidth usage never exceeded 4200kbit/s roughly one third of the actual bandwidth available (independently of various variations of the tcp buffer adjustments as suggested) :( Any further ideas!? Dirk ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Nbd-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nbd-general
