about df and lvm
test environment: centos 4.4 Linux localhost.localdomain 2.6.9-55.0.12.ELsmp #1 SMP Fri Nov 2 11:19:08 EDT 2007 i686 i686 i386 GNU/Linux lvm version LVM version: 2.02.21-RHEL4 (2007-03-26) Library version: 1.02.17-RHEL4 (2007-04-24) Driver version: 4.5.5 I creat 4G of size lvm partition. #df -h /dev/mapper/lvtest-lv4.0G 2.6G 1.3G 68% /mnt/lv #lvdisplay --- Logical volume --- LV Name/dev/lvtest/lv VG Namelvtest LV UUIDt4tXV0-UE5j-K7oq-IoXj-hXfP-mgej-CWXQVA LV Write Accessread/write LV Status available # open 1 LV Size4.09 GB Current LE 131 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:2 then I use the command lvextend to add 800M capatity into the lvm. but i also see the capatity is 4G by using df,lvdisplay show right information #lvextend -L +800M /dev/lvtest/lv Extending logical volume lv to 4.88 GB Logical volume lv successfully resized #df -h /dev/mapper/lvtest-lv4.0G 2.6G 1.3G 68% /mnt/lv #lvdisplay --- Logical volume --- LV Name/dev/lvtest/lv VG Namelvtest LV UUIDt4tXV0-UE5j-K7oq-IoXj-hXfP-mgej-CWXQVA LV Write Accessread/write LV Status available # open 1 LV Size4.88 GB Current LE 156 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:2 2007-12-04 tq01azk ___ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
Re: about df and lvm
On Tue, 4 Dec 2007, tq01azk wrote: test environment: centos 4.4 Linux localhost.localdomain 2.6.9-55.0.12.ELsmp #1 SMP Fri Nov 2 11:19:08 EDT 2007 i686 i686 i386 GNU/Linux lvm version LVM version: 2.02.21-RHEL4 (2007-03-26) Library version: 1.02.17-RHEL4 (2007-04-24) Driver version: 4.5.5 I creat 4G of size lvm partition. #df -h /dev/mapper/lvtest-lv4.0G 2.6G 1.3G 68% /mnt/lv [snip] then I use the command lvextend to add 800M capatity into the lvm. but i also see the capatity is 4G by using df,lvdisplay show right information #lvextend -L +800M /dev/lvtest/lv Extending logical volume lv to 4.88 GB Logical volume lv successfully resized #df -h /dev/mapper/lvtest-lv4.0G 2.6G 1.3G 68% /mnt/lv Does lvextend affect the logical volume (partition) size or the mounted filesystem? I think you'll need to run e2extend or other fs-specific tool to expand the filesystem structures, which is what df is reporting. Cheers, Phil ___ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
Re: about df and lvm
Philip Rowlands wrote: tq01azk wrote: #df -h /dev/mapper/lvtest-lv4.0G 2.6G 1.3G 68% /mnt/lv #lvextend -L +800M /dev/lvtest/lv Extending logical volume lv to 4.88 GB Logical volume lv successfully resized #df -h /dev/mapper/lvtest-lv4.0G 2.6G 1.3G 68% /mnt/lv Does lvextend affect the logical volume (partition) size or the mounted filesystem? I think you'll need to run e2extend or other fs-specific tool to expand the filesystem structures, which is what df is reporting. lvextend only affects the partition. After extending a partition it is necessary to run fsck and resizefs. Assuming ext3 the flow looks something like this: unmount /dev/vg1/lv1 lvextend -L+1G /dev/vg1/lv1 e2fsck -f /dev/vg1/lv1 resize2fs /dev/vg1/lv1 mount /dev/vg1/lv1 The LVM HOWTOs explain these fairly well. Bob ___ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
