On Friday 04 March 2005 04:01, Sven Köhler wrote: > Hi, > > has anybody compared the performance of UML's built-in blockdevice, > NetworkBlockDevices, ATAoverEthernet, yet? > > I don't know how UML's blockdevice works, but i know how NBD works. The > kernel sends multiple requests to the NBD server, and receives the > responses asap. The worse case for UML's block-device would be, if the > UML-blockdevice would perform each read/write operation one after > another. If it does that, it could be optimized by using a asynchronious > queue/message-based operation like NBD. Yes, we are trying to do this with AIO support (see the incrementals tree), however Linux has not a very good AIO support. -- Paolo Giarrusso, aka Blaisorblade Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade
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