Displaying 2 results from an estimated 2 matches for "_how_to_calculate_the_correct_sunit".
2017 Sep 20
3
xfs not getting it right?
...RAID1? If you read from both
disks in a RAID1 simultaneously, you have to wait out the latency of both
disks before you get the data at full speed, and it might be better to use
stripes with them as well and read multiple parts of the data at the same
time.
[1]: http://xfs.org/index.php/XFS_FAQ#Q:_How_to_calculate_the_correct_sunit.2Cswidth_values_for_optimal_performance
> The chunk size above is for the md-RAID write-intent bitmap; that's not
> exposed information (for any RAID system that I'm aware of, software or
> hardware) or something that filesystems can optimize for.
Oh, ok. How do you know wha...
2017 Sep 20
4
xfs not getting it right?
Hi,
xfs is supposed to detect the layout of a md-RAID devices when creating the
file system, but it doesn?t seem to do that:
# cat /proc/mdstat
Personalities : [raid1]
md10 : active raid1 sde[1] sdd[0]
499976512 blocks super 1.2 [2/2] [UU]
bitmap: 0/4 pages [0KB], 65536KB chunk
# mkfs.xfs /dev/md10p2
meta-data=/dev/md10p2 isize=512 agcount=4, agsize=30199892 blks