On 6/12/12 12:37 PM, Linda A. Walsh wrote: > > > Eric Sandeen wrote: >> On 6/10/12 10:21 PM, Linda A. Walsh wrote: >>> Is this something being thought about?? >>> >>> More than one of my hard disks: >>> >>> /boot: 130 files in 103112 4K blocks: 793.6 blks/file >>> /tmp: 1401 files in 746715 4K blocks: 533.4 blks/file >>> /var/cache: 1438 files in 87858 4K blocks: 61.5 blks/file >>> /backups: 713 files in 2523985177 4K blocks: 3539951.6 blks/file >>> /var: 9038 files in 746715 4K blocks: 83.1 blks/file >>> /var/cache/squid: 570 files in 90031 4K blocks: 158.4 blks/file >>> /Media: 51893 files in 1691400956 4K blocks: 32594.5 blks/file >>> /: 37312 files in 506778 4K blocks: 14.0 blks/file >>> /usr/share: 320805 files in 195425485 4K blocks: 609.6 blks/file >>> /backups/Media: 50544 files in 1642550112 4K blocks: 32497.9 blks/file >>> /usr: 116650 files in 1389380 4K blocks: 12.4 blks/file >>> /Share: 1617995 files in 305269701 4K blocks: 189.1 blks/file >>> /home: 5822174 files in 195412389 4K blocks: 34.0 blks/file >>> >>> All but 2 could benefit from a 16K block size, and 3 of them could benefit >>> from a 128K block size. Wouldn't that benefit in in freeing up some space >>> both on disk and in memory? Just a thought. >> >> Since on average each file in an evenly-distributed filesystem wastes half >> a block, in theory each fs would waste 4x more space w/ 16k blocks than >> 4k blocks, right? > --- > Well the real candidates for a larger block size would be backups, > and maybe Media... the rest wouldn't benefit. > > So, it sounds like I might just as well benefit by going to a 1K > block size, if there's no cost in smaller block sizes? Or would that be > entirely dependent on the files/dir? Well, there are some metadata overhead costs there, so it's a tradeoff. Like we always say, use the defaults unless you can definitively show that other options work better for your needs after testing. :) -Eric _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
