On 06/26/2012 12:50 AM, Keith Keller wrote:
On 2012-06-25, John R Pierce pierce@hogranch.com wrote:
On 06/25/12 1:10 PM, Alexander Dalloz wrote:
they really should be better integrated, like the way LVM and JFS are
integrated on AIX.
# chfs -a size=+2G /varadds 2GB to /var, online, automatically. grows the logical volume and resizes the file system, all at once.
Don't know where software RAID comes into play on AIX, but what is the difference of that command above to this one on CentOS 6?
# lvresize -L+2G -r VG_sys/LV_vardoes lvresize resize the file system while online? I didn't think it did. the man page for fsadm (referenced in the lvresize man page) says ext2/3/4 is unmounted before resizing. ooops. kind of hard to umount /var !
My man page for fsadm (CentOS 6) implies that you need to provide -e in order for fsadm to umount an ext? filesystem before attempting the resize. So in theory if you don't give -e it should resize while mounted.
I know that a combination of lvextend and resize2fs can be done online. I regulary add new virtual disks to guests and then add the space to the root partition in these guests in fact I just added 100G of space to a mongodb VM a few minutes ago. While I haven't used the -r switch yet I would think that it uses the same mechanism and thus should do all its work online as well.
Regards, Dennis