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This article mainly introduces "how to use ZFS file system on Ubuntu". In daily operation, I believe many people have doubts about how to use ZFS file system on Ubuntu. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts of "how to use ZFS file system on Ubuntu". Next, please follow the editor to study!

On Linux systems, there are plenty of file systems available, so why should we try a new file system? They all work well, don't they? But they are not exactly the same, and some of these file systems have outstanding advantages, such as ZFS.

Why choose ZFS?

ZFS is very good. This is a truly modern file system, and the built-in functionality makes sense for dealing with large amounts of data.

Now, if you are considering using ZFS for your ultra-high-speed NVMe SSD, this may not be a * option. It is slower than other file systems, but there is no problem at all, and it is designed to store large amounts of data and remain secure.

ZFS eliminates the need for a traditional RAID array (LCTT redundant array of independent disks). Instead, you can create ZFS pools and even add drives to them at any time. The behavior of the ZFS pool is almost exactly the same as that of RAID, but the functionality is built into the file system.

ZFS can also replace LVM (LCTT volume management), allowing you to partition and manage partitions dynamically without having to deal with the underlying details or worry about the associated risks.

This is also a CoW (LCTT copy on write) file system. There is not much technical mention here, which means that ZFS can protect your data from gradual corruption. ZFS creates a checksum of the files and allows you to roll back those files to the previous working version.

Install ZFS

Install ZFS on Ubuntu

Installing ZFS on Ubuntu is easy, but for Ubuntu LTS and * * versions, the process is slightly different.

Ubuntu 16.04 LTS

Sudo apt install zfs

Ubuntu 17.04and beyond

Sudo apt install zfsutils

After you have installed the program, you can use the tools provided by ZFS to create ZFS drives and partitions.

Create a pool

Create ZFS Pool

In ZFS, pools are roughly equivalent to RAID. They are flexible and easy to operate.

RAID0

RAID0 just centralizes your hard drive in a pool, just like a giant drive. It can improve your drive speed (LCTT), but if your drive is damaged, you may lose data.

To implement RAID0 using ZFS, simply create a normal pool.

Sudo zpool create your-pool / dev/sdc / dev/sddRAID1 (mirrored)

You can use the mirror keyword in ZFS to implement RAID1 functionality. RAID1 creates an one-to-one copy of the drive. This means that your data is backed up all the time. It also improves performance. Of course, you use half of your storage space for replication.

Sudo zpool create your-pool mirror / dev/sdc / dev/sddRAID5/RAIDZ1

ZFS implements the RAID5 function as RAIDZ1. RAID5 requires at least 3 drives. It also allows you to write backup parity data to 1 of the drive space (n is the number of drives), leaving available storage space. If a drive fails, the array will remain online, but the failed drive should be replaced as soon as possible (LCTT translation note: slightly different from the original translation, the original text is that the number of drives is a multiple of three, according to wiki, RAID5 requires at least three drives, can also be guessed from the following command).

Sudo zpool create your-pool raidz1 / dev/sdc / dev/sdd / dev/sdeRAID6/RAIDZ2

RAID6 is almost identical to RAID5, but it requires at least four drives. It doubles the parity data, allowing up to two drives to be damaged without causing the array to shut down. (LCTT translation note: there is also a slight difference here, the original text is that the number of drives is a multiple of four, according to wiki, RAID6 requires at least four drives).

Sudo zpool create your-pool raidz2 / dev/sdc / dev/sdd / dev/sde / dev/sdfRAID10 (striped mirror)

RAID10 aims to improve access speed and data redundancy through data striping to become a solution with the best of both worlds. You need at least four drives, but you can only use half the space. You can create a pool in RAID10 by creating two mirrors in the same pool. (LCTT note: this is also slightly different from the original text, which says that the number of drives is a multiple of four, and according to wiki, RAID10 requires at least four drives.)

Operation of sudo zpool create your-pool mirror / dev/sdc / dev/sdd mirror / dev/sde / dev/sdf pool

ZFS pool Status

There are also some management tools that you must use to operate once you have created your pool. First, check the status of your pool.

Sudo zpool status update

When you update ZFS, you also need to update your pool. When you check their status, your pool notifies you of any updates. To update the pool, run the following command.

Sudo zpool upgrade your-pool

You can also update all pools.

Sudo zpool upgrade-an add a drive

You can also add drives to the pool at any time. Tell zpool the name of the pool and the location of the drive, and it will take care of everything.

Some other ideas of sudo zpool add your-pool / dev/sdx

ZFS in File Browser

ZFS creates a directory in the root file system of your pool. You can browse them by name using the GUI File Manager or CLI.

ZFS is very powerful, and there are many other things that can be done with it, but these are the basics. This is an excellent storage load file system, even if it is just a RAID array of hard drives for files. ZFS is also very good at NAS systems.

Regardless of the stability and reliability of ZFS, back up your data when implementing new features on your hard drive.

At this point, the study on "how to use the ZFS file system on Ubuntu" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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