On Thu, 2022-02-10 at 18:11 +0200, Matti Pulkkinen wrote:
Hello,
TL;DR are there particular workloads that suffer from having to access a RAID0 array?
I've currently got my /home partition in a BTRFS RAID0 array with two 1 TB mechanical drives, and I'm considering getting SSDs for /home instead. I could get one 2 TB SSD and be happy with it, but I could instead get two 1 TB SSDs and make a RAID0 array again. The latter option would of course get me better overall throughput, but I'm wondering whether there are workloads that might suffer from being run from a RAID0 array vs. just running on a "bare" disk.
What I did was convert my 2x1TB HDDs (rescued from a dead NAS) to a BTRFS RAID1 array and attach them via a USB3 port for use as backup (using BorgBackup, which dedupes and compresses). I installed a single 2TB SSD (on a SATA3 port) for active use, i.e. /root, /home, /boot etc., also under BTRFS but with no RAID. My workload is nothing special, so YMMV, but I find the throughput of the SSD so dramatically better than an HDD that I don't care that it's not striped.
poc