3 ms·
This can essentially be accomplished with ZFS and an SSD as a L2ARC device. I have three 8 TB Seagate SMR drives in RAID-Z (aka RAID-5) with a 500 GB Samsung 9
by jamilbk 9y ago
This can essentially be accomplished with ZFS and an SSD as a L2ARC device.
I have three 8 TB Seagate SMR drives in RAID-Z (aka RAID-5) with a 500 GB Samsung 950 Pro M.2 as a L2ARC cache drive on the pool and it works beautifully for my workload.
In my experience, once the scratch area of the SMR drive is full, I get about 4-5 MB/s sustained write speed, which in my pool translates to 10 MB/s for the pool. Since the scratch area is about 25 GB, that means I can do 500 GB + 40-50GB of random writes before things slow to a crawl, and I have to wait (550 GB / 10 MB/s) = 55,000 s ~ 16 hours for the writes to flush.
I paid $179.99 each for these. Not Too Shabby.