[CentOS] Very slow disk I/O

[Joseph L. Brunner]

Lol - spinning disks? Really?

SSD is down to like 50cents a gig. And they have 1TB disks... slow disks = you get what you deserve... welcome to 2015. Autolacing shoes, self drying jackets, hoverboards - oh, yeah, and 110k IOPS 1TB SamSung Pro 850 SSD Drives for $449 on NewEgg.

dumbass

-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Les Mikesell
Sent: Tuesday, February 03, 2015 12:42 AM
To: CentOS mailing list
Subject: Re: [CentOS] Very slow disk I/O

On Mon, Feb 2, 2015 at 11:37 PM, Jatin Davey <jashokda at cisco.com> wrote:
>
> I will test and get the I/O speed results with the following and see 
> what works best with the given workload:
>
> Create 5 volumes each with 150 GB in size for the 5 VMs that i will be 
> running on the server Create 1 volume with 600GB in size for the 5 VMs 
> that i will be running on the server Try with LVM volumes instead of 
> files
>
> Will test and compare the I/O responsiveness in all cases and go with 
> the one which is acceptable.

Unless you put each VM on its own physical disk or raid1 mirror you aren't really doing anything to isolate the vms from each other or to increase the odds that a head will be near the place the next access needs it to be.

--
  Les Mikesell
    lesmikesell at gmail.com
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