Hi! I'm a big fan of nbd and using it for quite a while. In my standard setups of local ethernet LANs it performs well. I did some measurements:
10MBit/s: hdparm -tT gives me ~1000kByte/sek. 100MBit/s: hdparm -tT gives me ~5-6.2MByte/sek. 1000MBit/s: hdparm -tT gives me ~23MByte/sek. measured on an average Core Duo, Intel board with Gig of RAM. Server (single Opteron with 4GByte of Mem, low load) and client are on the same subnet (one or two switches in between). Checked all values with dd reading of 10MByte linear from device - nearly same results. When it comes to WAN connections (higher latencies) the performance drops significantly: ~100Mbit/s bandwidth (at least) between server and client and the performance drops to ~520-750kByte/sek. When I try it over cable (okay, might be a little bit perverted - 25Mbit/s ping of 15ms) or DSL (14Mbit/s ping of 35ms) the results drop to less than 200kByte/sek. It is still possible to run a stateless client that way (squashfs ontop of nbd), but you have to be patient while an app is starting the first time. Is there any chance to get above the 10Mbit/s LAN rate in the WAN DSL or cable scenarios!? Thanks!! 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
