Re: [linux-lvm] stripped LV with segments vs one segment
On 11/04/17 18:37, Marian Csontos wrote: On 04/10/2017 04:27 PM, lejeczek wrote: On 10/04/17 13:27, Marian Csontos wrote: On 04/10/2017 01:16 PM, lejeczek wrote: I had 3 stripe LV, you know, three PVs, and wanted the LV to have 4 stripes, wanted to add 4th PV, you can see it from above lvdisplay. What you want is "reshape" not extend. This was committed as RAID feature to 2.02.169, but it is still somewhat experimental. You would need to convert stripe LV to RAID0 (aka takeover) and then reshape. convert from stipe to raid0 would not preserve stripe sizes? is this correct? It should keep stripe size and if it does not it is a bug. then probably a bug, I don't have it as was on the console in front of me now, but should be easy to replicate. I had stripe LV with 16KB stripe and conversion(successful) to raid0 said I got 64KB stripe raid0 - is how I remember it. nor it would: -I/--stripesize not allowed for LV dellH200.InternalB/0 when converting from striped to raid0. As it says, the option is simply not allowed. Also it would be meaningless - one can not change stripe size while converting stripe to raid0. At least not in RHEL-7.3 (lvm2-2.02.166). This is supposed to work in upstream/2.02.169, but keep in mind that is a new feature, and it is altering data, so better keep a working backup. LVM version: 2.02.166(2)-RHEL7 (2016-11-16) Library version: 1.02.135-RHEL7 (2016-11-16) Driver version: 4.35.0 ___ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
Re: [linux-lvm] stripped LV with segments vs one segment
On 04/10/2017 04:27 PM, lejeczek wrote: On 10/04/17 13:27, Marian Csontos wrote: On 04/10/2017 01:16 PM, lejeczek wrote: I had 3 stripe LV, you know, three PVs, and wanted the LV to have 4 stripes, wanted to add 4th PV, you can see it from above lvdisplay. What you want is "reshape" not extend. This was committed as RAID feature to 2.02.169, but it is still somewhat experimental. You would need to convert stripe LV to RAID0 (aka takeover) and then reshape. convert from stipe to raid0 would not preserve stripe sizes? is this correct? It should keep stripe size and if it does not it is a bug. nor it would: -I/--stripesize not allowed for LV dellH200.InternalB/0 when converting from striped to raid0. As it says, the option is simply not allowed. Also it would be meaningless - one can not change stripe size while converting stripe to raid0. At least not in RHEL-7.3 (lvm2-2.02.166). This is supposed to work in upstream/2.02.169, but keep in mind that is a new feature, and it is altering data, so better keep a working backup. LVM version: 2.02.166(2)-RHEL7 (2016-11-16) Library version: 1.02.135-RHEL7 (2016-11-16) Driver version: 4.35.0 ___ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
Re: [linux-lvm] stripped LV with segments vs one segment
On 04/10/2017 03:35 PM, lejeczek wrote: On 10/04/17 13:27, Marian Csontos wrote: On 04/10/2017 01:16 PM, lejeczek wrote: I had 3 stripe LV, you know, three PVs, and wanted the LV to have 4 stripes, wanted to add 4th PV, you can see it from above lvdisplay. What you want is "reshape" not extend. This was committed as RAID feature to 2.02.169, but it is still somewhat experimental. You would need to convert stripe LV to RAID0 (aka takeover) and then reshape. thanks, I see it more clearly now. Is it possible to get rid of that second segment now? Have the LV prior to extension? Either lvresize to previous size or vgcfgrestore would work UNLESS you resized the filesystem as well. vgcfgrestore has more limitations - no other metadata altering operations were performed on VG since the change. Marian ___ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
