On xfs file systems, I was under the impression that:
# xfs_info /dev/mapper/rootvg-root meta-data=/dev/sda1 isize=512 agcount=16, agsize=1285043 blks = sectsz=4096 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=19730834, imaxpct=25 = sunit=64 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=5119, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0
imaxpct=25 - is the percentage of filesystem space inodes can potentially take up
isize=512 - the bytes size of each single inode
So when I look at my setup below:
# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/rootvg-root 80G 42G 38G 51% / # df -hi Filesystem Inodes IUsed IFree IUse% Mounted on /dev/mapper/rootvg-root 1.3M 27K 1.3M 1% /
How is it possible that I could have a maximum number of only 1.3 million inodes? If each inode is 512bytes, then that means that total amount of disk space the inodes can take up (if fully used) is only 665mb. Wherewas 25% of 80gb is 20gb, so I would expect a lot more inodes than this.
I don't see any option in mkfs.xfs to determine a numerical number for inodes, rather only size of each inode and percentage of file system inode can take up.
Any ideas of what I'm missing here? This is for rhel 7, xfs file system.