Adding SSD to my pool?

Lumikor · April 24

The Setup:

I8700, 32GB DDR4 @ 3200Mhz, 4X8TB HDD+256GB SSD. 1Gb LAN connection.

TrueNAS SCALE Dragnofish 24.04

The Usage:

File server & Plex server.

The Issue:

I'de like to use the SSD, I know how to add VDAV to the pool but there are several options which fits, Log, Cache and Metadata. I'm not sure which one to use for the best performance. The files I care about are about 1-2GB in size.

Your advices will be very welcome.

Electronics Wizardy · April 24

For media use over a 1gbe link, your not gonna really help performance much here by adding a SSD. The best is probably a cache drive, but it won't help much with this use case. Metadata probably won't help with big files, and if it fails you lose all your data. Log won't help over SMB and general fileserver use at all.

LIGISTX · April 24

33 minutes ago, Lumikor said:

The Setup:

I8700, 32GB DDR4 @ 3200Mhz, 4X8TB HDD+256GB SSD. 1Gb LAN connection.

TrueNAS SCALE Dragnofish 24.04

The Usage:

File server & Plex server.

The Issue:

I'de like to use the SSD, I know how to add VDAV to the pool but there are several options which fits, Log, Cache and Metadata. I'm not sure which one to use for the best performance. The files I care about are about 1-2GB in size.

Your advices will be very welcome.

Don't add the SSD, it won’t help anything.

Your system can already easily saturate a gigabit network link…

Definitely do not add is as a metadata vdev. If your metadata vdev dies, all data is lost… so if you did want to add a metadata vdev it needs its own redundancy at at least the same

level as the pool. But, again, for a gigabit network doing standard NAS duty, the speed gains are just not relevant anyways. Keep things simple, simple is almost always better for 24/7/365 applications like a NAS.