On 01/08/12 11:30, Jim Klimov wrote:
However for smaller servers, such as home NASes which have about one user overall, pre-reading and caching files even for a single use might be an objective per se - just to let the hard-disks spin down. Say, if I sit down to watch a movie from my NAS, it is likely that for 90 or 120 minutes there will be no other IO initiated by me. The movie file can be pre-read in a few seconds, and then most of the storage system can go to sleep.
Isn't this just a more extreme case of prediction? In addition to the file system knowing there will only be one client reading 90-120 minutes of (HD?) video that will fit in the memory of a small(er) server, now the hard drive power management code also knows there won't be another access for 90-120 minutes so it is OK to spin down the hard drive(s). _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
