ZFS With Raid 1

[Dakater]

Enterprise SSDs aren't that expensive anymore. You can get some nice second-hand eMLC Enterprise SSDs for 60€ per TB. Or even new NVMe TLC Enterprise SSDs starting at 70€ per TB

Checked all the params for eMLC and TLC again.
No. TLC is not fine for ZFS while 1.000-3.000 cycles is just not enough.

But those enterprise MLC is a try with 20.000 to 30.000 cycles. Thanks for this. No idea why I never saw or read about before. Great hint.

 

[Dunuin]

Again, there are no SLC, eMLC or MLC anymore unless you want to buy second-hand hardware or new old stock. Only SLC you see these days are industrial USB sticks and industial SD cards and only MLC are SMMs and DOMs. Last SLC SSD product lines were killed in 2022 (Intel Optane). and last MLC SSD product lines in 2018 (except for some Transcent SMMs).

If you got lots of writes, many sync writes or a high write amplification your best bet these days is to buy a very big TLC Enterprise SSD with PLP, don't partition the whole disk and use the unallocated space as additional spare area for wear leveling.

 

[mow]

Again, there are no SLC, eMLC or MLC anymore unless you want to buy second-hand hardware or new old stock. Only SLC you see these days are industrial USB sticks and industial SD cards and only MLC are SMMs and DOMs. Last SLC SSD product lines were killed in 2022 (Intel Optane). and last MLC SSD product lines in 2018 (except for some Transcent SMMs).

I thought WD still had some Ultrastar SS300 models? (Starting with HUSM, TLC would be HUST)
And there's https://www.solidigm.de/products/data-center/d7/p5810.html, 144L SLC 3D NAND with 50 DWPD, I assume that's the new Optane.
Edit: Kioxia has something similar with 60 DWPD: https://europe.kioxia.com/en-europe/business/ssd/enterprise-ssd.html#fl-series

If you got lots of writes, many sync writes or a high write amplification your best bet these days is to buy a very big TLC Enterprise SSD with PLP, don't partition the whole disk and use the unallocated space as additional spare area for wear leveling.

That's not necessarily optimal. The really big SSDs optimized for size tend to have less TBW than smaller but mixed-workload ones like the P4610.

Another thing is data retention. QLC SSDs guarantee only 3 months, so better don't keep those offline for long.