Re: LVM: how to avoid scanning all devices
On Wed, Dec 20, 2017 at 02:17:59PM +1100, Igor Cicimov wrote: > Look at filter examples in /etc/lvm/lvm.conf That's not what I'm looking for. I *do* have LVM physical and logical volumes on most of my drives, e.g. a volume group on my backup drive. And I want an explicit call to vgscan to find all these volumes. Therefore a filter excluding these device is not the solution. But I dislike all my drives spinning up and having to wait for that when I simply call vgdisplay vg0 to see how much space is left in my primary volume group with /, /usr, /var and /home file systems, which are active all time. Steve
Re: LVM: how to avoid scanning all devices
On 15 Dec 2017 11:36 pm, "Steve Keller" wrote: When calling LVM commands it seems they all scan all disks for physical volumes. This is annoying because it spins up all disks that are currently idle and causes long delays to wait for these disks to come up. Also, I don't understand why LVM commands scan the disks so often since the information is in /etc/lvm already. For example a command like vgdisplay vg0 where vg0 is actively used and on a disk that is up and running still causes a long delay because it scans all my devices for other volumes although this is completely unneeded. IMO only an explicit call to vgscan should scan for and update all LVM information. Steve Look at filter examples in /etc/lvm/lvm.conf
Re: LVM: how to avoid scanning all devices
Hi Steve, On Fri, Dec 15, 2017 at 01:19:46PM +0100, Steve Keller wrote: > When calling LVM commands it seems they all scan all disks for > physical volumes. This is annoying because it spins up all disks that > are currently idle and causes long delays to wait for these disks to > come up. Can you avoid it by using global_filter to restrict LVM's operation to certain devices? Cheers, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting
LVM: how to avoid scanning all devices
When calling LVM commands it seems they all scan all disks for physical volumes. This is annoying because it spins up all disks that are currently idle and causes long delays to wait for these disks to come up. Also, I don't understand why LVM commands scan the disks so often since the information is in /etc/lvm already. For example a command like vgdisplay vg0 where vg0 is actively used and on a disk that is up and running still causes a long delay because it scans all my devices for other volumes although this is completely unneeded. IMO only an explicit call to vgscan should scan for and update all LVM information. Steve
Re: LVM how to
Gianni> how can I resize the LVM default partition layout of debian? Gianni> The root is to small around 400mb... I looked around the web Gianni> but it look like I need to do that from a rescue cd, which one Gianni> should I use? Any good link for a easy how to :) I wrote an article about it which also covers resizing http://sunoano.name/ws/public_xhtml/lvm.html If you want to resize the root partition then using some sort of CD certainly is the best/easiest choice. http://en.wikipedia.org/wiki/Grml pgpHMIK60JtlC.pgp Description: PGP signature
Re: LVM how to
On Wed, 03 Jun 2009 16:31:19 -0500, Boyd Stephen Smith Jr. wrote: > In , Hendrik Boom wrote: >>On Wed, 20 May 2009 00:34:24 +0100, Roger Leigh wrote: >>> You don't need a rescue CD, and you can even do it while the >>> filesystem is mounted! >> >>So the warnings about unmounting the file system before expanding it in >>the "LVM HOWTO section 11.9. Extending a logical volume" at >>http://www.tldp.org/HOWTO/LVM-HOWTO/extendlv.html are strictly obsolete? >> >>I'm talking about an etch system with an ext3 file system on llvm on >>raid. > > While I still recommend a backup, I always recommend backups. Multiple backups on different continents, offline in your friends' sock drawers work great. > I've never needed one when expanding > reiserfs or ext2/3.[1!] JFS and XFS are also supposed be to growable > online. Just did that. Worked great. Thanks. > > If shrinking a filesystem, you will need to unmount it; some filesystems > don't like being shrunk at all. Yeah. Taking away data is trickier. -- hendrik -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Re: LVM how to
In , Hendrik Boom wrote: >On Wed, 20 May 2009 00:34:24 +0100, Roger Leigh wrote: >> On Wed, May 20, 2009 at 07:17:48AM +1000, gianni wrote: >>> HI lists >>> how can I resize the LVM default partition layout of debian? the root >>> is to small around 400mb... I looked around the web but it look like I >>> need to do that from a rescue cd, which one should I use? >> >> You don't need a rescue CD, and you can even do it while the filesystem >> is mounted! > >So the warnings about unmounting the file system before expanding it in >the "LVM HOWTO section 11.9. Extending a logical volume" at >http://www.tldp.org/HOWTO/LVM-HOWTO/extendlv.html >are strictly obsolete? > >I'm talking about an etch system with an ext3 file system on llvm on raid. While I still recommend a backup, I've never needed one when expanding reiserfs or ext2/3.[1!] JFS and XFS are also supposed be to growable online. If shrinking a filesystem, you will need to unmount it; some filesystems don't like being shrunk at all. -- Boyd Stephen Smith Jr. ,= ,-_-. =. b...@iguanasuicide.net ((_/)o o(\_)) ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-' http://iguanasuicide.net/\_/ [1] NB: There was (and may still be) two different resizers for ext2/3. One works only online, one works only offline. I think the online one is recommended by the ext2/3 developers now. signature.asc Description: This is a digitally signed message part.
Re: LVM how to
On Wed, 20 May 2009 00:34:24 +0100, Roger Leigh wrote: > On Wed, May 20, 2009 at 07:17:48AM +1000, gianni wrote: >> HI lists >> how can I resize the LVM default partition layout of debian? the root >> is to small around 400mb... I looked around the web but it look like I >> need to do that from a rescue cd, which one should I use? > > You don't need a rescue CD, and you can even do it while the filesystem > is mounted! So the warnings about unmounting the file system before expanding it in the "LVM HOWTO section 11.9. Extending a logical volume" at http://www.tldp.org/HOWTO/LVM-HOWTO/extendlv.html are strictly obsolete? I'm talking about an etch system with an ext3 file system on llvm on raid. -- hendrik -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Re: LVM how to
On Wed, May 20, 2009 at 07:17:48AM +1000, gianni wrote: > HI lists > how can I resize the LVM default partition layout of debian? > the root is to small around 400mb... I looked around the web but it look > like I need to do that from a rescue cd, which one should I use? > any good link for a easy how to :) > thanks It seems as though the d-i default is too small from the messages on this list. Maybe it should be bumped up a bit? -- Chris. == I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours. -- Stephen F Roberts -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Re: LVM how to
gianni wrote: > how can I resize the LVM default partition layout of debian? > the root is to small around 400mb... It depends entirely whether your root partition is part of the LVM or not. If it's part of the LVM you can use lvextend and then resize2fs (or if you're not using ext2/3/4, your equivalent filesystem-specific utility to grow the filesystem). If it's not (i.e. it's a physical partition) then you're unfortunately in for a backup and reinstall. Chris -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Re: LVM how to
On Tue, 2009-05-19 at 23:20 +0200, gianni wrote: > HI lists > how can I resize the LVM default partition layout of debian? > the root is to small around 400mb... I looked around the web but it look > like I need to do that from a rescue cd, which one should I use? > any good link for a easy how to :) > thanks > > > A good link for me was > http://www.linuxdevcenter.com/pub/a/linux/2006/04/27/managing-disk-space-with-lvm.html. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Re: LVM how to
On Wed, May 20, 2009 at 07:17:48AM +1000, gianni wrote: > how can I resize the LVM default partition layout of debian? > the root is to small around 400mb... I looked around the web but it look > like I need to do that from a rescue cd, which one should I use? > any good link for a easy how to :) No rescue CD required. Install (if you can) the doc-linux-HOWTO package, or go to tldp.org and read the LVM HOWTO. It has examples of how to do most things. Then read the man pages for each command. Basically, you have to shrink the file system size (resize), then shrink (resize) the LV its on. Then grow (resize) the target LV, then grown (resize) the target filesystem. Do a backup first, please. Doug. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Re: LVM how to
On Wed, May 20, 2009 at 07:17:48AM +1000, gianni wrote: > HI lists > how can I resize the LVM default partition layout of debian? > the root is to small around 400mb... I looked around the web but it look > like I need to do that from a rescue cd, which one should I use? You don't need a rescue CD, and you can even do it while the filesystem is mounted! This following example resizes the "data" LV of the "ravenclaw" volume group. The first step is to increase the LV size by 2 GiB. Then, we resize the filesystem contained on the LV to fit into the larger space available to it (if you aren't using ext2/ext3, you'll need to use the tool for your specific filesystem). lvresize -L +2G /dev/ravenclaw/data resize2fs /dev/ravenclaw/data Obviously shrinking is a little more involved size you might need to move things in order to shrink it, so unmounting might be necessary. However, for your case, you don't even need to log out! Regards, Roger -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/ `-GPG Public Key: 0x25BFB848 Please GPG sign your mail. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Re: LVM how to
In <1242767868.4841.6.ca...@machina.eolo>, gianni wrote: >how can I resize the LVM default partition layout of debian? Growing or shrinking? What filesystem(s) involved? -- Boyd Stephen Smith Jr. ,= ,-_-. =. b...@iguanasuicide.net ((_/)o o(\_)) ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-' http://iguanasuicide.net/\_/ signature.asc Description: This is a digitally signed message part.
LVM how to
HI lists how can I resize the LVM default partition layout of debian? the root is to small around 400mb... I looked around the web but it look like I need to do that from a rescue cd, which one should I use? any good link for a easy how to :) thanks -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
