Graham Leggett wrote: > Davi Arnaut wrote: > >>> The proxy that the LiveJournal folks wrote, I think, copies all the data >>> from the origin server into a file and then uses sendfile to send to the >>> client... >> Doesn't this limit the network bandwidth to the bandwidth of the disk >> and/or file system? > > Yes, and the effective bandwidth of the disk can be significantly higher > than both the cache backend (which is often expensive) and the network > frontend (which has slow potential slow clients typing up your resources). > > Don't forget that your cache disk is most often RAM backed, meaning > effectively your cache disk is a ramdisk, with all the speed advantages > that go with it. >
This is true for expensive hardware and very well designed operating systems and file systems.. and the space is not infinite. But... OK. Back to the topic I thought that one of the key points of async/event based servers were that we use software to scale and not hardware (so that hardware is not the bottleneck)... like serving thousands of slow clients from commodity hardware. -- Davi Arnaut
