Druschel, PeterPai, VivekZwaenepoel, Willy2017-08-022017-08-021997-10-27Druschel, Peter, Pai, Vivek and Zwaenepoel, Willy. "IO-Lite: A unified I/O buffering and caching system." (1997) https://hdl.handle.net/1911/96476.https://hdl.handle.net/1911/96476This paper presents the design, implementation, and evaluation ofIO-Lite, a unified I/O buffering and caching system. IO-Lite unifies all buffering and caching in the system, to the extent permitted by the hardware. In particular, it allows applications, interprocess communication, the file system, the file cache, and the network subsystem to share a single physical copy of the data safely and concurrently. Protection and security are maintained through a combination of access control and read-only sharing. The various subsystems use (mutable) buffer aggregates to access the data according to their needs. IO-Lite eliminates all copying and multiple buffering of I/Odata, and enables various cross-subsystem optimizations. Performance measurements show significant performance improvements on Web servers and other I/O intensive applications.17 ppengYou are granted permission for the noncommercial reproduction, distribution, display, and performance of this technical report in any format, but this permission is only for a period of forty-five (45) days from the most recent time that you verified that this technical report is still available from the Computer Science Department of Rice University under terms that include this permission. All other rights are reserved by the author(s).Technical reportTR97-294