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Question about what to put on RAID and what to put on NVME (lemmy.world)

submitted 1 day ago* (last edited 1 day ago) by ch00f@lemmy.world to c/selfhosted@lemmy.world

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Since 2016, I've had a fileserver mostly just for backups. System is on 1 drive, RAID6 for files, and semi-annual cold backup.

I was playing with Photoprism, and their docs say "we recommend placing the storage folder on a local SSD drive for best performance." In this case, the storage folder holds basically everything but the pictures themselves such as the database files.

Up until now, if I lost any database files, it was just a matter of rebuilding them by re-indexing my photos or whatever, but I'm looking for something more robust since I'll have some friends/family using Pixelfed, Matrix, etc.

So my question is: Is it a valid strategy to keep database files on the SSD with some kind of nightly backup to RAID, or should I just store the whole lot on the RAID from the get go? Or does it even matter if all of these databases can fit in RAM anyway?

edit: I'm just now learning of ZFS caching which might be my answer.

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[–] ch00f@lemmy.world 1 points 7 hours ago

So I’m kind of on the fence about this. I ran a raid boot disk system like 12 years ago, and it was a total pain in the ass. Just getting it to boot after an update was a bit hit or miss.

Right now I’m leaning towards hardware nvme raid for the boot disk just to obfuscate that for Linux, but still treat it delicately and back up anything of importance nightly to a proper software raid and ultimately to another medium as well.