> > The files are approx. 1 MB with an thumbnail of approx. 4 KB. > > > > So the 1 MB files are stored as ~8 x 128K recordsize. > > Because of > 5003563 use smaller "tail block" for last block of object
I tried to search for this but only saw references to this and similar threads. Is there a database where I can search? > The last block of you file is partially used. It will depend > on your filesize distribution by without that info we can > only guess that we're wasting an avg of 64K per file. Or 6%. > > If your distribution is such that most files are slightly > more than 1M, then we'd have 12% overhead from this effect. > > So using 16K/32K recordsize would quite possibly help as > files would be stored using ~ 64 x 16K blocks with an > overhead of < 1-2% (0.5 blocks wasted every 64). Variying recordsizes and no compression: Recordsize=2k: 426G Recordsize=4k: 417G Recordsize=8k: 411G Recordsize=16k: 412G Recordsize=32k: 417G Default recordsize of 128k and compression: Standard-compression: 410G Gzip-1: 402G Gzip-6: 402G Recordsize=16k and standard compression: 406G Recordsize 8- and 16k comes closest to 401 GB on vxfs. Should I try with a single hardrive and verify 16k recordsize disk usage? -- regards Claus When lenity and cruelty play for a kingdom, the gentlest gamester is the soonest winner. Shakespeare _______________________________________________ zfs-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
