Slow SSD disks

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vpsl
Posts: 3
Joined: Thu Mar 14, 2019 1:53 am

Slow SSD disks

Post by vpsl »

Hello, I have an 8440 storage with 200 fc 15K disks. Recently, I added 20 of 1.9 terabytes ssd disks to the device and moved some of the existing virtual volumes with 10 terabytes of space to the ssd disks with the tune tool, but after that, the database admin told me that ssd disks respond slower than hdd.
Any idea?
MammaGutt
Posts: 1578
Joined: Mon Sep 21, 2015 2:11 pm
Location: Europe

Re: Slow SSD disks

Post by MammaGutt »

vpsl wrote:Hello, I have an 8440 storage with 200 fc 15K disks. Recently, I added 20 of 1.9 terabytes ssd disks to the device and moved some of the existing virtual volumes with 10 terabytes of space to the ssd disks with the tune tool, but after that, the database admin told me that ssd disks respond slower than hdd.
Any idea?


Slower in terms of what? bandwidth? latency? What are the DB guys doing? what is the configuration of FC CPG and SSD CPG?
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