On 27/12/20 7:20 am, Nicolas Kovacs wrote:
Hi,
My workstation is currently equipped with a pair of Western Digital Red 1 TB
SATA disks in a software RAID 1 setup.
Some stuff like working with virtual machines is a bit slow, so I'm thinking
about replacing the disks by SSD.
I noticed tremendous improvement when I migrated my VM QCOW2 discs to a
Crucial MX500 1TB drive. Previously, they were on a HGST Travelstar
1.5TB drive spinning at 5400rpm.
You'd get better performance if you stripe set as opposed to a mirror
set on that spinning silicon.
<digress>
When I noticed this improvement, I starting digging up on why the marked
improvement. During my k8s setup, I recall measuring IOPS using FIO [0]
in order to ensure ETCD functioned appropriately. When I measured IOPS
on my 1.5TB drive, it recorded a value of 37 IOPS. With the MX500, that
number is 1092 IOPS.
[0]:
https://www.ibm.com/cloud/blog/using-fio-to-tell-whether-your-storage-is-fast-enough-for-etcd
</digress>
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