Technical optimizations To prevent the streaming server from becoming I/O bound, the following things were done: use linux syscall sendfile() to remove some memcpy() calls create one giant file for the entire video to reduce open/close calls made it singlethreaded instead of multithreaded set the read size to 65536 bytes, which is the optimal read size based on the below chart and empirical testing (note: for a full implementation, it would be preferable to use 12 servers and XRaids rather than 6, so that I/O is less likely to be a limiting factor, potentially reducing the need for some or all of these suggestions.)     All content copyright © 2006 Envision Center All rights reserved.