[CentOS] shrink LV with ext3 filesystem
Hi. I want to make a snapshot from a logical volume and noticed that there must be enough free disk space in the volume group. Actually there is no free disk space left. How do i shrink online /var without losing any data or restore from backup? I do not have physical access to the server. Specs: Dell PE SC1430 with a 5/i RAID Controller one RAID 1 array from the Dell RAID controller 2 partitons (boot and LVM) 1 VG 3 LV (swap, /var (/dev/VolGroup00/LogVol02) and / formatted with ext3) /dev/mapper/VolGroup00-LogVol02 211G 39G 162G 20% /var Thank you in advance. Thomas Antony ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] shrink LV with ext3 filesystem
On Tue, Sep 04, 2007 at 12:40:24PM +0200, Thomas Antony wrote: Hi. I want to make a snapshot from a logical volume and noticed that there must be enough free disk space in the volume group. Actually there is no free disk space left. How do i shrink online /var without losing any data or restore from backup? You can't shrink ext2/ext3 filesystems online. You'll have to schedule a downtime. Another solution is to remove and use a file for swap (swapoff ... lvremove ...), or reduce it (swapoff ... lvreduce ... mkswap swapon). -- lfr 0/0 pgpWNyYQ1lIb9.pgp Description: PGP signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] shrink LV with ext3 filesystem
Luciano Rocha schrieb: On Tue, Sep 04, 2007 at 12:40:24PM +0200, Thomas Antony wrote: Hi. I want to make a snapshot from a logical volume and noticed that there must be enough free disk space in the volume group. Actually there is no free disk space left. How do i shrink online /var without losing any data or restore from backup? You can't shrink ext2/ext3 filesystems online. You'll have to schedule a downtime. Another solution is to remove and use a file for swap (swapoff ... lvremove ...), or reduce it (swapoff ... lvreduce ... mkswap swapon). Hi. Is it possible that i log into the server with ssh and umount only /var and then resize the logical volume? Thomas ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] shrink LV with ext3 filesystem
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thomas Antony Luciano Rocha schrieb: On Tue, Sep 04, 2007 at 12:40:24PM +0200, Thomas Antony wrote: Hi. I want to make a snapshot from a logical volume and noticed that there must be enough free disk space in the volume group. Actually there is no free disk space left. How do i shrink online /var without losing any data or restore from backup? You can't shrink ext2/ext3 filesystems online. You'll have to schedule a downtime. Another solution is to remove and use a file for swap (swapoff ... lvremove ...), or reduce it (swapoff ... lvreduce ... mkswap swapon). Hi. Is it possible that i log into the server with ssh and umount only /var and then resize the logical volume? Maybe in single user mode, but /var is needed for multi-user mode to function. Remember: if shrinking, shrink filesystem first then LV, if expanding then expand the LV first then the filesystem. -Ross __ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] shrink LV with ext3 filesystem
Thomas Antony wrote: Is it possible that i log into the server with ssh and umount only /var and then resize the logical volume? Try it. Most probably the system will tell you that the disk is in use. What you could do then is booting from a live CD and resize it from there (System will be offline, of course). Regards Sebastian ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] shrink LV with ext3 filesystem
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thomas Antony Is it possible that i log into the server with ssh and umount only /var and then resize the logical volume? Yes, but you'll have to stop a lot of daemons and other processes that run with files opened in /var. You can find the processes accessing /var with lsof or fuser: # fuser -mv /var # lsof /var I stopped all services except sshd and fuser and lsof doesn't show me any files, but i still can't unmount /var :-( # umount /var umount: /var: device is busy umount: /var: device is busy Ayn ideas? /var is required for multi-user mode. Try bringing the system to single-user mode 'init 1' and then try it. -Ross __ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] shrink LV with ext3 filesystem
On Tue, Sep 04, 2007 at 08:18:18PM +0200, Thomas Antony wrote: Is it possible that i log into the server with ssh and umount only /var and then resize the logical volume? Yes, but you'll have to stop a lot of daemons and other processes that run with files opened in /var. You can find the processes accessing /var with lsof or fuser: # fuser -mv /var # lsof /var I stopped all services except sshd and fuser and lsof doesn't show me any files, but i still can't unmount /var :-( # umount /var umount: /var: device is busy umount: /var: device is busy Ayn ideas? Are you using chrooted BIND? Do a cat /proc/mounts, search for var, and unmount anything in use. -- lfr 0/0 pgp6YuR8J94u2.pgp Description: PGP signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] shrink LV with ext3 filesystem
# umount /var umount: /var: device is busy umount: /var: device is busy Ayn ideas? Are you using chrooted BIND? Do a cat /proc/mounts, search for var, and unmount anything in use. # cat /proc/mounts | grep var /dev/VolGroup00/LogVol02 /var ext3 rw,data=ordered 0 0 I can't unmount var. I think it is like Ross already wrote, that /var can't be unmounted in multi-user mode. It would be nice if someone could explain why /var is unmountable, even when fuser -mv /var and /lsof /var doesn't return any files. Thomas ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
