Theodore Tso wrote:
One of the big problems of using a filesystem as a DB is the system call overheads. If you use huge numbers of tiny files, then each attempt read an atom of information from the DB takes three system calls --- an open(), read(), and close(), with all of the overheads in terms of dentry and inode cache.
Now, to be fair, there are probably a number of cases where open/lseek/readv/close and open/lseek/writev/close would be worth doing as a single system call. The big problem as far as I can see involves EINTR handling; such a system call has serious restartability implications.
Of course, there are Ingo's syslets... -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/