Hello, what do you mean with > How about striping with the strip size equal to that of a logical extent? Can you give an example for the lvcreate command. The reason to do this is to distribute the disk I/O accross all disks. the logical extent 1 is on disk1, logical extent 2 on disk 2 and so on. This means during read of logical extent 1, the heade of the second disk can already be moved to prepare to read logical extent 2. This allows us to do more I/O's per second Holger -----Original Message----- From: James Hawtin [mailto:oolon@pzat.meep.org] Sent: Samstag, 30. November 2002 14:40 To: linux-lvm@sistina.com Cc: lvm-devel@sistina.com Subject: Re: [linux-lvm] lvcreate distributed extent option On Sat, 30 Nov 2002, ZECHA,HOLGER (HP-Germany,ex1) wrote: > > Hello, > > I want to create a logical volume of 40GB Size using a physical 9GB disks,is > there a way to create a logical volume in the way, that the first logical > extend is on disk one, the second on disk two, ... the 7th on disk one and > so on ? > > Meaning all logical extends are distributed accross all disks. > > In HP-UX lvdisplay wwill look like this: > --- Logical extents --- > LE PV1 PE1 Status 1 > 00000 /dev/dsk/c16t0d0 00012 current > 00001 /dev/dsk/c16t0d1 00012 current > 00002 /dev/dsk/c17t0d2 00000 current > 00003 /dev/dsk/c17t0d3 00000 current > 00004 /dev/dsk/c16t0d4 00000 current > 00005 /dev/dsk/c16t0d5 00000 current > 00006 /dev/dsk/c17t0d6 00000 current > 00007 /dev/dsk/c17t0d7 00000 current > 00008 /dev/dsk/c16t1d0 00000 current > 00009 /dev/dsk/c16t1d1 00000 current > 00010 /dev/dsk/c17t1d2 00000 current > 00011 /dev/dsk/c17t1d3 00000 current > 00012 /dev/dsk/c16t1d4 00000 current > > Holger > How about striping with the strip size equal to that of a logical extent? otherwise if you have quite alot of disk space on another drive you could create your lv on that one then move the extents one at a time to the destinations drives using pvmove..... One does wonder why you want to do this! James _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
