mdadm vs lvm raid

1. What is the difference between LVM and RAID?
2. Does LVM use RAID?
3. Is LVM better?
4. Should I use ZFS or LVM?
5. Why is ZFS better than hardware RAID?
6. What is the difference between LVM and ZFS?
7. Is ZFS a RAID software?
8. What is difference between LVM and standard partition?
9. Does LVM affect performance?
10. Why should I use LVM?
11. How can I tell if I am using LVM?
12. Is ZFS faster than ext4?
13. Should I use ZFS when installing Ubuntu?
14. Why should I use ZFS?

What is the difference between LVM and RAID?

RAID aims to improve redundancy whereas LVM aims to improve DATA management and handling. ... LVM is a method of logically partitioning your memory device over multiple disks in order to have a single or multiple partition over multiple disks. LVM is purely a software which manages multiple disks.

Does LVM use RAID?

This article will provide an example of how to install and configure Arch Linux with Logical Volume Manager (LVM) on top of a software RAID. Tip: LVM itself supports logical volumes in RAID configurations. See LVM#RAID for an alternative to this article.

Is LVM better?

The answer depends on the actual use case. LVM can be extremely helpful in dynamic environments, when disks and partitions are often moved or resized. ... However, in a static environment where partitions and disks are never changed, there is no reason to configure LVM unless you need to create snapshots.

Should I use ZFS or LVM?

You can use RAID to make fault-tolerance partitions, but LVM is used to easy disk partitioning and filesystem edition. You can use RAID over LVM or ZFS (ZFS is can work both RAID and LVM). In my opinion, ZFS works better than LVM, but: on Solaris 10/11/OpenSOlaris only, you can't use it from linux.

Why is ZFS better than hardware RAID?

For example, instead of a hardware RAID card getting the first crack at your drives, ZFS uses a JBOD card that takes the drives and processes them with its built-in volume manager and file system. This gives ZFS a greater control to bypass some of the challenges hardware RAID cards usually have.

What is the difference between LVM and ZFS?

ZFS and LVM are disk management systems. With ZFS you're limited to ZFS whereas with LVM you can partition using any filesystem (btrfs, xfs, ntfs, etc.) ZFS is the safest but with the most overhead. The requirements are not slim for desktop, single user usage.

Is ZFS a RAID software?

ZFS is an entirely different animal, and it encompasses functions that normally might occupy three separate layers in a traditional Unixlike system. It's a logical volume manager, a RAID system, and a filesystem all wrapped into one.

What is difference between LVM and standard partition?

In my opinion the LVM partition is more usefull cause then after installation you can later change partition sizes and number of partitions easily. In standard partition also you can do resizing, but total number of physical partitions are limited to 4. With LVM you have much greater flexibility.

Does LVM affect performance?

There are cases where LVM can cause performance problems. ... Oh, and using LVM snapshots degrades performance (and increasingly so with each active snapshot). But mostly, the impact should be very small.

Why should I use LVM?

The main advantages of LVM are increased abstraction, flexibility, and control. Logical volumes can have meaningful names like “databases” or “root-backup”. Volumes can be resized dynamically as space requirements change and migrated between physical devices within the pool on a running system or exported easily.

How can I tell if I am using LVM?

Try running lvdisplay on command line and is should display any LVM volumes if they exist. Run df on the MySQL data directory; this will return the device where the directory resides. Then run lvs or lvdisplay to check if the device is an LVM one.

Is ZFS faster than ext4?

That said, ZFS is doing more, so depending on the workload ext4 will be faster, especially if you have not tuned ZFS. These differences on a desktop will probably not be visible to you, especially if you already have a fast disk.

Should I use ZFS when installing Ubuntu?

While ZFS isn't installed by default, it's trivial to install. It's officially supported by Ubuntu so it should work properly and without any problems. However, it's only officially supported on the 64-bit version of Ubuntu–not the 32-bit version. Just like any other app, it should install immediately.

Why should I use ZFS?

Pooled Storage

Unlike most files systems, ZFS combines the features of a file system and a volume manager. This means that unlike other file systems, ZFS can create a file system that spans across a series of drives or a pool. Not only that but you can add storage to a pool by adding another drive.