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 VPS Disk Caching (5 Replies, Read 4702 times)
keyjey
Posted on # December 5, 2015, 12:30 pm
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Post Group: Newbie
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Hi, anyone experienced that Disk Caching does absolutely nothing in KVM VPSs ? it makes no sense.

I'm coming from Proxmox and and i've made same tests using same hardware node.

In Proxmox, I could get 800-900MB/s inside a CentOS 6 vps, in Proxmox I get 300MB/s rates. Performance is 3x times inferior !!!!

Also, I tried on a different production node with Virtualizor and same problem ! No caching, very poor performance ! Tested a production VPS cPanel VPS and could feel the performance problem instantly.

So ssems a general problem on all virtualizor systems.

Anyone saw this ? Any idea about why is this ? how to fix it ?

Thank you.
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VPS Disk Caching
keyjey
Posted on # December 5, 2015, 4:37 pm | Post: 1
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Post Group: Newbie
Posts: 30
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Also, when I disable the VPS Caching System nothing changes. Same performance.

No one did notice this ? Any tip ?

Can someone help ?

Thank you.
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VPS Disk Caching
Shahzadqayyum
Posted on # December 30, 2015, 7:23 pm | Post: 2
Group: Member
Post Group: Newbie
Posts: 3
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I installed KVM node on trial. very poor experience :(  :neu:
even one vps with 2 core processors and 4 GB ram is too slow. cant handle more than one running applications
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VPS Disk Caching
keyjey
Posted on # December 30, 2015, 7:41 pm | Post: 3
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Post Group: Newbie
Posts: 30
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Another way to test this, is to install in the same node Proxmox VE (http://www.proxmox.com/en/proxmox-ve/get-started). You'll notice that disk performance of the VPSs is 3x times faster with same kind of cache enabled.

This is what I did in this node.
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VPS Disk Caching
Shahzadqayyum
Posted on # December 30, 2015, 7:43 pm | Post: 4
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Post Group: Newbie
Posts: 3
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I never tried proxmos? how about their support?
i was thinking to try solusvm?
have you also tried their services?
thanks for your recommendation
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VPS Disk Caching
keyjey
Posted on # December 30, 2015, 7:54 pm | Post: 5
Group: Member
Post Group: Newbie
Posts: 30
Status:
Hold. I didn't recommend to use Proxmox, I just suggested to use it in same kind of server or the same node to see the disk performance difference.

Proxmox is free but you don't have support. Professional support packages are not cheap, it's a different kind of product.

SolusVM is quite complex, I didn't like it, but is the most VM panel used in the VPS hosting market.

I would prefer to use Virtualizor.

Regarding Virtualizor, this are the things I don't like:

1.- This disk performance issue (for me this is a bug)
2.- Backup system, quite arcaid and not very friendly if you have an emergency, you have to do a lot of tricks to restore multiple VMs, need to improve a lot about this.
3.- The way of time management in the node / VMs. I never understood why I can't have my local time in hardware node and have the timezone time on every VPS without issues.

This are the things I like:

1.- The panel itself is quite nice and modern look. Same for end users
2.- Softaculous support is not the best, sometimes is very slow, but good effort, I like that you can contact them in skype for emergencies.
3.- The software in general is very stable lately, and works quite fine.
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