On Wed, Sep 01, 2010 at 09:38:46AM +0200, Michael Monnerie wrote: > On Mittwoch, 1. September 2010 Gim Leong Chin wrote: > > Should we leave it at the default 256 bytes, or set it to the maximum > > of 2 kB? > > An interesting question. Why are inodes sizes configurable at all? To > store ACLs? How would one know when bigger Inodes should be used? And > what is the implication when they would be needed but aren't used? The XFS inode consists of three parts: - the fixed format dinode - the data fork - the attribute fork the fixed format inode is fixed size, so any change in the inode size only applies to the data and attribute forks. For regular files we generally don't use much space in the data fork as it just contains the extent list, and most files have rather few of them. But we can also store short smbolic links directly inside it, as well as the content of directories. The attribute fork is used to store extent attributes and if it's large enough we can store them inline instead of using external blocks. You want large inodes mostly if you store lots of extentded attributes, either for ACLs, Selinux or posisbly DMAPI. It will also help if you have enough directories that are just too big for the inline directory format with smaller inode sizes. > > -- > mit freundlichen Gr?ssen, > Michael Monnerie, Ing. BSc > > it-management Internet Services > http://proteger.at [gesprochen: Prot-e-schee] > Tel: 0660 / 415 65 31 > > ****** Aktuelles Radiointerview! ****** > http://www.it-podcast.at/aktuelle-sendung.html > > // Wir haben im Moment zwei H?user zu verkaufen: > // http://zmi.at/langegg/ > // http://zmi.at/haus2009/ > _______________________________________________ > xfs mailing list > xfs@xxxxxxxxxxx > http://oss.sgi.com/mailman/listinfo/xfs ---end quoted text--- _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
