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. > Just save the per-inode temperature only for now. > > Mingming >> On Fri, Nov 2, 2012 at 12:04 PM, Zhi Yong Wu <zwu.kernel@xxxxxxxxx> wrote: >> > HI, guys >> > >> > VFS hot tracking currently show result as below, and it is very >> > strange and not nice. >> > >> > inode #279, reads 0, writes 1, avg read time 18446744073709551615, >> > avg write time 5251566408153596, temp 109 >> > >> > Do anyone know if there is one simpler but effective way to calculate >> > data temperature? >> > >> > -- >> > Regards, >> > >> > Zhi Yong Wu >> >> >> > > > -- Regards, Zhi Yong Wu -- 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
