Am Freitag, 14. September 2012 schrieb Stan Hoeppner: > On 9/14/2012 7:57 AM, Martin Steigerwald wrote: > > Am Freitag, 14. September 2012 schrieb Stan Hoeppner: > >> Thus my advice to you is: > >> > >> Do not use LVM. Directly format the RAID10 device using the > >> mkfs.xfs defaults. mkfs.xfs will read the md configuration and > >> automatically align the filesystem to the stripe width. > > > > > > > > Just for completeness: > > > > > > It is possible to manually align XFS via mkfs.xfs / mount options. > > But then thats an extra step thats unnecessary when creating XFS > > directly on MD. > > And not optimal for XFS beginners. But the main reason for avoiding > LVM is that LVM creates a "slice and dice" mentality among its users, > and many become too liberal with the carving knife, ending up with a > filesystem made of sometimes a dozen LVM slivers. Then XFS > performance suffers due to the resulting inode/extent/free space > layout.
Agreed. I have seen VMs with seperate /usr and minimal / and mis-estimated sizing. There was perfectly enough place in the VMDK, but just in the wrong partition. I fixed it back then by adding another VMDK file. (So even with partitions I found those setups.) Something else is to split up /var/log or /var. But then we are talking about user and not system data here anyway. I have always recommended to leave at least 10-15% free, but from a discussion on XFS mailinglist where you took part, I learned that depending on use case for large volumes even more free space might be necessary for performant long term operation. -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201209161438.22645.mar...@lichtvoll.de
