From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 01 Jun 2001 10:58:02 -0700 From: Eric Wang Subject: Re: [linux-lvm] How do I find out if my logic volume is striped or not? In-Reply-To: <20010601140805.B9156@sistina.com> References: <20010531100027.EC5A.MRLIST@activestate.com> <20010601140805.B9156@sistina.com> Message-Id: <20010601104549.EC5D.MRLIST@activestate.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: List-Id: Content-Type: text/plain; charset="us-ascii" To: linux-lvm@sistina.com Thanks Heinz! Let me make straight, you mean if I created a stripped lv, and then I will not be able to extent the lv to a other pv? then if I have 3 pv in different size, then lvcreate -i 3 -I 4 -L all_disk_sparce -n name vgname will never work? or maybe untill version 1.0 it will work? And I still have a question, if I have both SCSI and IDE disks in one machine , if I can created a big lv with pv come from both SCSI and IDE disks? On Fri, 1 Jun 2001 14:08:05 +0200 "Heinz J. Mauelshagen" wrote: > On Thu, May 31, 2001 at 10:08:06AM -0700, Eric Wang wrote: > > I am trying to achive the best performance > > here is my situation > > Eric, > in your IDE case you could gain performance setting up a striped LV > on hda *or* hdb and hdc. > IDE devices sitting on the same adaptor suffer from io constraints > and therefore don't give you parallel thrughput. > > > > > #vgdisplay -v > > --- Volume group --- > > VG Name TITAN > > VG Access read/write > > VG Status available/resizable > > VG # 0 > > MAX LV 256 > > Cur LV 1 > > Open LV 0 > > MAX LV Size 255.99 GB > > Max PV 256 > > Cur PV 3 > > Act PV 3 > > VG Size 98.65 GB > > PE Size 4 MB > > Total PE 25255 > > Alloc PE / Size 19482 / 76.1 GB > > Free PE / Size 5773 / 22.55 GB > > VG UUID c2I7Km-QuZy-O3GK-nUXL-WtAC-VHRO-r75ivY > > > > --- Logical volume --- > > LV Name /dev/TITAN/home > > VG Name TITAN > > LV Write Access read/write > > LV Status available > > LV # 1 > > # open 0 > > LV Size 76.1 GB > > Current LE 19482 > > Allocated LE 19482 > > Stripes 2 > > Stripe size (KByte) 4 > > Allocation next free > > Read ahead sectors 120 > > Block device 58:0 > > > > > > --- Physical volumes --- > > PV Name (#) /dev/hda9 (3) > > PV Status available / allocatable > > Total PE / Free PE 5649 / 5649 > > > > PV Name (#) /dev/hdb1 (1) > > PV Status available / allocatable > > Total PE / Free PE 9803 / 63 > > > > PV Name (#) /dev/hdc1 (2) > > PV Status available / allocatable > > Total PE / Free PE 9803 / 63 > > > > I am trying to create stripped lv here, how I am going to do that? > > You already created one; see the lines above saying "Stripes 2" and > "Stripe size (KByte) 4". > > > > > anyway an odd problem is after create a stripped lv then vgextent the vg > > with /dev/hda9, but I can't lvextent the lv > > # lvextend -L+20G /dev/TITAN/home > > lvextend -- extending logical volume "/dev/TITAN/home" to 96.1 GB > > lvextend -- not enough free/allocatable physical extents to extend logical volume "/dev/TITAN/home" > > > > what was the problem? > > That's a constraint of the LVM which will disapear in a post 1.0 release. > If you want to extend on multiple PVs you need to go with a linear LV. > > Regards, > Heinz -- The LVM Guy -- > > > > > > > On Thu, 31 May 2001 14:34:57 +0200 > > "Heinz J. Mauelshagen" wrote: > > > > > > > > Eric, > > > > > > lvdisplay shows lines beginning with "Stripes" and "Stripe size (KByte)" > > > in case you use it on a striped LV and /proc/lvm/global displays > > > information as well. > > > > > > On Wed, May 30, 2001 at 07:11:36PM -0700, Eric Wang wrote: > > > > Hi all, > > > > > > > > How do I find out if my logic volume is striped or not? > > > > lvdisplay seems not produce this information. > > > > > > > > Thanks > > > > _______________________________________________ > > > > linux-lvm mailing list > > > > linux-lvm@sistina.com > > > > http://lists.sistina.com/mailman/listinfo/linux-lvm > > > > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html > > > > > > -- > > > > > > Regards, > > > Heinz -- The LVM Guy -- > > > > > > *** Software bugs are stupid. > > > Nevertheless it needs not so stupid people to solve them *** > > > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > > > > > Heinz Mauelshagen Sistina Software Inc. > > > Senior Consultant/Developer Am Sonnenhang 11 > > > 56242 Marienrachdorf > > > Germany > > > Mauelshagen@Sistina.com +49 2626 141200 > > > FAX 924446 > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > > _______________________________________________ > > > linux-lvm mailing list > > > linux-lvm@sistina.com > > > http://lists.sistina.com/mailman/listinfo/linux-lvm > > > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html > > > > > > _______________________________________________ > > linux-lvm mailing list > > linux-lvm@sistina.com > > http://lists.sistina.com/mailman/listinfo/linux-lvm > > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html > > *** Software bugs are stupid. > Nevertheless it needs not so stupid people to solve them *** > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > Heinz Mauelshagen Sistina Software Inc. > Senior Consultant/Developer Am Sonnenhang 11 > 56242 Marienrachdorf > Germany > Mauelshagen@Sistina.com +49 2626 141200 > FAX 924446 > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html