Page 1 of 2 12 LastLast
Results 1 to 15 of 19
  1. #1
    Join Date
    Jun 2010
    Location
    Java Island
    Posts
    143

    * [Ask] How many oversold that allowed for OpenVZ node?

    Hi all,

    I have dedicated server with this spec's
    Intel Quad core x3460, 16GB of RAM, 2TB (Raid-1) disk, 10TB monthly bandwidth on 1 gbps shared uplinks...

    I create a VPS plan which have 512MB of guaranteed ram (may be with 768MB or 1GB busrtable ram) & 300GB monthly bandwidth.
    How many vps can be created in terms of safely oversold for RAM, Bandwidth and CPU?
    Thanks in advance

    -sorry for my bad english-
    regards,

  2. #2
    You should host 16 - 24 VPS, depending of the burstable RAM you offer. Do not oversell. You will run into troubles.
    Host Color Colocation, Dedicated & Europe Dedicated Servers since 2000
    U.S. Data center 90 miles from Chicago
    Network ★ AS46873 Level 3, Cogent, Hurricane Electric, Retn.net, Midwest Peering
    24/7 Support 1-574-367-2393; Skype: HostColor

  3. #3
    Join Date
    Oct 2010
    Location
    Belgium
    Posts
    35
    When you have 30 VM's you will have this for every VM (without overselling):
    * 512MB RAM
    * 60GB HDD
    * min. 30Mbit (when everybody max it!)
    * 341GB traffic
    * CPU: 0,25 So 1/4'the of a core

    But leave some space for customers with more needs. (when they want to upgrade)

    It all depends on what you want to do. Here every VM with a dedicated core, but the price will be different ... (Xen virtualisation)
    Tim Bracquez
    Web :: www.fusa.eu
    Belgium dedicated servers and colocation
    Happy to serve more then 4500 customers !

  4. #4
    Join Date
    Jun 2010
    Location
    Java Island
    Posts
    143
    Quote Originally Posted by HostColor View Post
    You should host 16 - 24 VPS, depending of the burstable RAM you offer. Do not oversell. You will run into troubles.
    thanks for your advice, what's the troubles that usually happen with overselling? could you share it there.

    Quote Originally Posted by Fusa View Post
    When you have 30 VM's you will have this for every VM (without overselling):
    * 512MB RAM
    * 60GB HDD
    * min. 30Mbit (when everybody max it!)
    * 341GB traffic
    * CPU: 0,25 So 1/4'the of a core

    But leave some space for customers with more needs. (when they want to upgrade)

    It all depends on what you want to do. Here every VM with a dedicated core, but the price will be different ... (Xen virtualisation)
    Thanks for the suggestion
    I'll consider to use xen virtualization for my next step

  5. #5
    Join Date
    Jan 2010
    Location
    USA
    Posts
    2,147
    Quote Originally Posted by Echizen View Post
    thanks for your advice, what's the troubles that usually happen with overselling? could you share it there.
    When you oversell memory with OpenVZ, you will eventually end up providing poor performance for all of the VMs.
    No Support Linux Hosting Bargain cPanel Hosting Experts Only
    We IGNORE the support questions, and pass the SAVINGS on to YOU!
    We also ignore questions about VPS Hosting

  6. #6
    Quote Originally Posted by NoSupportLinuxHostin View Post
    When you oversell memory with OpenVZ, you will eventually end up providing poor performance for all of the VMs.
    True. Plus need to limit the CPU limit per VPS like core and %.

  7. #7
    Join Date
    Jun 2010
    Location
    Java Island
    Posts
    143
    Quote Originally Posted by turbovps View Post
    True. Plus need to limit the CPU limit per VPS like core and %.
    thanks for the sugetsion. Do you have recommendation limiting CPU unit, CPU cores & CPU % for this plan?

  8. #8
    The only other issue I see here, is that you're only using 2x2tb drives in raid 1. A 4 drive raid 10 of 1tb drives will offer at least double the performance with the same amount of disk space. This will allow you to fit more users on there before everything starts to run slowly.
    Phoenix Dedicated Servers -- IOFLOOD.com
    Email: sales [at] ioflood.com
    Skype: funkywizard
    Backup Storage VPS -- 1TBVPS.com

  9. #9
    As others have said, limiting is important. We have had many customers switch over to us because their old provider kept going out. Probably because they were overselling.

  10. #10
    Join Date
    Jun 2010
    Location
    Java Island
    Posts
    143
    Hi all,
    thanks for your input

  11. #11
    Join Date
    Jun 2006
    Location
    Cluj Napoca
    Posts
    468
    Yeah, you will reach the I/O limit of those hdds pretty soon. Raid10 may help you a little bit but far from double the IO.
    Everything else looks ok, your first bottleneck will be the hdds. Keep in mind that there is no option to limit IO for a VM (ioprio is overrated) so any VM can bring your node to an unusable state and it will be pretty hard to figure out which of the VMs is responsible.
    IntoDNS - Check your DNS health and configuration
    IntoVPS - US Fremont and Dallas;EU - Netherlands and Romania VPS hosting

  12. #12
    Join Date
    Aug 2008
    Location
    Seattle, WA
    Posts
    463
    Quote Originally Posted by Fusa View Post
    Here every VM with a dedicated core, but the price will be different ... (Xen virtualisation)
    Xen only does this if you use CPU pinning. Otherwise, the virtual CPUs float across the physical CPUs dynamically.
    Seattle, WA - Gigabit Carrier & Network Services Provider
    Uptime | Atlas Networks

  13. #13
    Join Date
    Sep 2010
    Location
    Arkansas, USA
    Posts
    22
    When we built out our first node, we had an Intel C2Q Q9550 with 8GB of RAM and 2x1TB RAID 1. We fit about 20 VMs on that box before things started falling down around us. Not sure with your CPU/RAM though.
    Chris C
    VeriaTel Systems - Shared WebHosting, VPS Hosting

  14. #14
    Join Date
    Feb 2010
    Location
    Lisbon, Portugal
    Posts
    1,164
    I think with time you will see how much VPS's you can add, how much VPS's you can delete.

    There will be costumers that use less resources then the allocated ones, and there will be costumers that use more then the allocated resources.

    So, my sugesttion is actually when you think that you reached the max, you just stop adding and buy another machine to host more Virtual Private Servers.
    Looking for a system administrator? One time install/ hiring a system administrator?

    PM me or email me at bernardooan@gmail.com for more details.

  15. #15
    Join Date
    Mar 2007
    Location
    Netherlands
    Posts
    27
    Be careful with overselling. Because most sites will grow over time, you`ll run into troubles sooner or later if you oversell to much.

Page 1 of 2 12 LastLast

Similar Threads

  1. VPS Node(OpenVZ) is getting DDoSed
    By Markovic in forum Hosting Security and Technology
    Replies: 11
    Last Post: 08-16-2013, 11:46 AM
  2. VPS node configuration issue [hyperVM - Openvz]
    By mello21century in forum Dedicated Server
    Replies: 8
    Last Post: 10-27-2010, 04:56 PM
  3. Replies: 3
    Last Post: 08-13-2010, 12:03 PM
  4. Installing CSF in openvz hardware node
    By kselva in forum Hosting Security and Technology
    Replies: 7
    Last Post: 03-10-2010, 06:40 AM
  5. How to secure /tmp,/dev/shm without access to OpenVZ Hardware node?
    By balaji_dutt in forum Hosting Security and Technology
    Replies: 0
    Last Post: 08-25-2008, 07:07 AM

Related Posts from theWHIR.com

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •