Re: [CentOS] RAID?

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 /var

adds 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_var

software raid in AIX is handled by the LVM layer, and if the LV is configured for mirroring ('copies=2'), then the resized LV will also be mirrored.

does 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 !