Pool Configuration

TrueNAS General
1

Hello Guys,

So, finished building a 16x16TB server. Now, my question is how many vdevs should i use? A single or two or more than that?

On old forum, i read somewhere about the safe limits for the vdev sizng. Not sure where to find it again. If someone can help, it would be really appreciated.

Thanks

2

Depends on your use case

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3

General idea:

Bulk storage: 2 x 8-wide raidz2/3, or 2 x 7-wide with spares.

Block storage (iSCSI): 5 x 3-way mirror + spare, or 8 x 2-way mirror.

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So, as per the ZFS Primer, here is what it says:

We do not recommend using more than 12 disks per vdev. The recommended number of disks per vdev is between 3 and 9. With more disks, use multiple vdevs.

Does this mean the safe could be two vdevs containing 8 vdevs each? I heard that more the vdevs, more the IOPS and speed improvements. Is that true?

Also, would it be safe when using 8 vdevs containing two drives, where one drive is mirror in each vdev set? Is that a safe layout?

5

You want to read the following.

But to give you short answers:

Yes and Yes.

Not particularly.

1 Like
6

Will give a read and get back to you mate!