Re: LVM RAID vs LVM over MD

2016-12-13 Thread Igor Cicimov
On 12 Dec 2016 10:21 pm, "Jonathan Dowland" wrote: On Tue, Dec 06, 2016 at 10:53:30AM +1100, Igor Cicimov wrote: > It depends. If you are using cloud services with remote shared storage like > AWS EBS it does not make sense using LVM on top of RAID. To me it is just > adding

Re: LVM RAID vs LVM over MD

2016-12-12 Thread Jonathan Dowland
On Tue, Dec 06, 2016 at 10:53:30AM +1100, Igor Cicimov wrote: > It depends. If you are using cloud services with remote shared storage like > AWS EBS it does not make sense using LVM on top of RAID. To me it is just > adding complexity to already complex SAN storage. You also have no idea > what

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Igor Cicimov
On 6 Dec 2016 5:14 am, "Nicholas Geovanis" wrote: > > I'd like to make sure I'm taking away the right thing from this conversation. > It seems we have high-level recommendations _not_ to use LVM RAID1. > Not just over MD, simply don't use it at all. Do I get that right? >

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Sven Hartge
Roman Tsisyk wrote: > On Mon, Dec 5, 2016 at 10:47 PM, Sven Hartge wrote: >> Dan Ritter wrote: >>> If you want LVM on top of RAID, use LVM on top of mdadm, but >>> consider whether you might actually want ZFS instead. >> Side note:

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Roman Tsisyk
On Mon, Dec 5, 2016 at 10:47 PM, Sven Hartge wrote: > Dan Ritter wrote: > >> If you want LVM on top of RAID, use LVM on top of mdadm, but consider >> whether you might actually want ZFS instead. > > Side note: With ZFS you don't want to use MD (or any

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Sven Hartge
Dan Ritter wrote: > If you want LVM on top of RAID, use LVM on top of mdadm, but consider > whether you might actually want ZFS instead. Side note: With ZFS you don't want to use MD (or any other RAID) below ZFS but instead put all disk directly into a (or multiple) VDEV.

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Sven Hartge
Nicholas Geovanis wrote: > I'd like to make sure I'm taking away the right thing from this > conversation. > It seems we have high-level recommendations _not_ to use LVM RAID1. Yes. > Not just over MD, simply don't use it at all. Do I get that right? Yes. With MD lower

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Dan Ritter
On Mon, Dec 05, 2016 at 01:14:14PM -0600, Nicholas Geovanis wrote: > I'd like to make sure I'm taking away the right thing from this > conversation. > It seems we have high-level recommendations _not_ to use LVM RAID1. > Not just over MD, simply don't use it at all. Do I get that right? > Yes.

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Nicholas Geovanis
I'd like to make sure I'm taking away the right thing from this conversation. It seems we have high-level recommendations _not_ to use LVM RAID1. Not just over MD, simply don't use it at all. Do I get that right? On Mon, Dec 5, 2016 at 4:25 AM, Jonathan Dowland wrote: > On Sat,

Re: LVM RAID vs LVM over MD

2016-12-05 Thread Jonathan Dowland
On Sat, Dec 03, 2016 at 07:39:37PM +0100, Kamil Jońca wrote: > So far I used lvm with raid1 device as PV. > > Recently I have to extend my VG > (https://lists.debian.org/debian-user/2016/11/msg00909.html) > > and I read some about lvm. > If I understand correctly, LVM have builtin RAID1

Re: LVM RAID vs LVM over MD

2016-12-03 Thread Kamil Jońca
Henrique de Moraes Holschuh writes: > On Sat, 03 Dec 2016, Kamil Jońca wrote: >> If I understand correctly, LVM have builtin RAID1 functionality. >> And I wonder about migrating >> lvm over md --> (lvm with raid1) over physical hard drive partitions. >> >> Any cons? > > Yes,

Re: LVM RAID vs LVM over MD

2016-12-03 Thread Roman Tsisyk
On Sat, Dec 3, 2016 at 9:39 PM, Kamil Jońca wrote: > So far I used lvm with raid1 device as PV. > > Recently I have to extend my VG > (https://lists.debian.org/debian-user/2016/11/msg00909.html) > > and I read some about lvm. > If I understand correctly, LVM have builtin

Re: LVM RAID vs LVM over MD

2016-12-03 Thread Sven Hartge
Kamil Jońca wrote: > So far I used lvm with raid1 device as PV. > Recently I have to extend my VG > (https://lists.debian.org/debian-user/2016/11/msg00909.html) > and I read some about lvm. If I understand correctly, LVM have > builtin RAID1 functionality. And I wonder

Re: LVM RAID vs LVM over MD

2016-12-03 Thread Henrique de Moraes Holschuh
On Sat, 03 Dec 2016, Kamil Jońca wrote: > If I understand correctly, LVM have builtin RAID1 functionality. > And I wonder about migrating > lvm over md --> (lvm with raid1) over physical hard drive partitions. > > Any cons? Yes, many. Don't do it. -- Henrique Holschuh

LVM RAID vs LVM over MD

2016-12-03 Thread Kamil Jońca
So far I used lvm with raid1 device as PV. Recently I have to extend my VG (https://lists.debian.org/debian-user/2016/11/msg00909.html) and I read some about lvm. If I understand correctly, LVM have builtin RAID1 functionality. And I wonder about migrating lvm over md --> (lvm with raid1) over