Re: Bad workloads for RAID0?

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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
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