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BTRFS vs EXT4

J

jordan12

[H]F Junkie
Joined
Dec 29, 2000
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So I have two Asustor Nas's and I have read that BTRFS supports scanning for bit rot. And EXT4 does not. And I am very confused as to what is the better option. Can someone give me some opinions please?
 
I am not familiar with Asustor devices, what operating system they come with?
Can you use ZFS on that?
I think you need to use filesystem supported by their OS. Btrfs cannot work in RAID5/6 modes and that's a most commonly used configuration in commercial NAS devices.
 
jordan12 said:
So I have two Asustor Nas's and I have read that BTRFS supports scanning for bit rot. And EXT4 does not. And I am very confused as to what is the better option. Can someone give me some opinions please?
Click to expand...
If you are using (or planning on usiing) it is fine for the filesystem, but DO NOT use its internal redundancy options, they are unreliable and you WILL lose data. Synology, for example, supports BTRFS with SHR/SHR2/R5/R6 as the underlying filesystem with redundency, I do not know what ASUS does for their products.
 
Yeah, you need to find out if and how this Asus device does RAID. Hopefully md raid under BTRFS.

In a standalone Linux system ZFS would be the weapon of choice.
 
I gather that BTRFS doesn't deal well with out-of-space situations, and I've had some serious performance issues running certain DBMS setups on BTRFS. Between BTRFS and EXT4 I'd probably still use EXT4 unless I needed some specific BTRFS feature. For database hosting I'm still an XFS guy, and I agree that for a NAS-type device I'd probably use ZFS in place of either.
 
Btrfs is good for main machine, where you can juggle the disks, mix and match capacities, replace entire arrays, turn raid modes on and off. It's very flexible. NAS usually stay constant through it's life, so ZFS makes more sense. And ZFS is more likely to be supported by NAS operating system, compared to Btrfs.
 
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