On Mon, Nov 05, 2012 at 10:35:50AM +0800, Zhi Yong Wu wrote: > On Sat, Nov 3, 2012 at 5:27 AM, Mingming.cao <cmm@xxxxxxxxxx> wrote: > > On Fri, 2012-11-02 at 14:38 +0800, Zhi Yong Wu wrote: > >> Here also has another question. > >> > >> How to save the file temperature among the umount to be able to > >> preserve the file tempreture after reboot? > >> > >> This above is the requirement from DB product. > >> I thought that we can save file temperature in its inode struct, that > >> is, add one new field in struct inode, then this info will be written > >> to disk with inode. > >> > >> Any comments or ideas are appreciated, thanks. > >> > >> > > > > Maybe could save the last file temperature with extended attributes. > It seems that only ext4 has the concept of extended attributes. All major filesystems have xattr support. They are used extensively by the security and integrity subsystems, for example. Saving the information might be something that is useful to certian applications, but lets have the people that need that functionality spell out their requirements before discussing how or what to implement. Indeed, discussion shoul dreally focus on getting the core, in-memory infrastructure sorted out first before trying to expand the functionality further... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
