Feb 02, 2019 · sdb1: /boot/efi sdb2: LVM2 PV --> mint-vg/root & mint-vg/swap_1. I am able also to build the raid. One thing I'm not sure about is whether to create multiple independent raid0 LV's for swap, cache and cache_meta or to create a single contiguous LV on the raid, and divide that up into swap, cache and cache_meta.
It appears as though RAID-0 offers a bit better throughput performance than LVM, particularly at the very small record sizes. The same is true for IOPS. Summary. A fairly common question people ask is whether it is better to use data striping with RAID-0 (mdadm) or LVM.
May 23, 2020 · I'm little confused, because I found two different instructions about creating RAID0 with LVM. First resource shows way of creating RAID0 wit this pattern: lvcreate -i [num drives] -I [strip size] -l100%FREE -n [lv name] [vg name] but looking into official manual, it shows little different approach to do, at least I think, the same task.
The LV type corresponds to a RAID level. The basic RAID levels that can be used are: raid0, raid1, raid4, raid5, raid6, raid10. lvcreate --type RaidLevel [ ...
For performance reasons instead of using one large LVM volume, it might be replaced by multiple small striped (RAID0) volumes. There is no command to ...
On the other hand, LVM allows you to combine all of the space in all of the drives into a single virtual space. You can use stripe mapping across the drives as you would in RAID-0, with the capacity being the same as RAID-0. However, LVM allows you to also use the remaining space for additional volume groups (VGs).
10.5. Creating a RAID0 (striped) logical volume · Label the disks you will use in the volume group as LVM physical volumes with the pvcreate command. Warning.
This example procedure creates an LVM RAID0 logical volume called mylv that stripes data across the disks at /dev/sda1, /dev/sdb1, and /dev/sdc1. Label the disks you will use in the volume group as LVM physical volumes with the pvcreate command. Warning.
23.05.2020 · The two LVM commands above both create a striped volume, but using different drivers: the first command (the one without --type=raid0) defines a striped segment type which, in turn, is a fancy name for devicemapper-level striping; the second command (the one with --type=raid0) uses the classical Linux MD driver to setup a "true" RAID0.
I am assuming you mean Hardware RAID with LVM on Top, vs. LVM and Software RAID on top of LVM. If so, I always advise to opt for hardware based RAID first. Software RAID is just that, while overhead is small, hardware RAID performance will be better 9 out of 10 times. Of course, the methodology will very much depend on your final goal.