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Dont Let Inefficient Data Access Undermine Your Virtualization Goals


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Presentation by Rob Steward, Vice President of R&D at DataDirect Technologies given at Virtualization World 2008 in NYC. Covers the basics of what is virtualization, what is good about it, what is …

Presentation by Rob Steward, Vice President of R&D at DataDirect Technologies given at Virtualization World 2008 in NYC. Covers the basics of what is virtualization, what is good about it, what is not good about it, and specifically how you plan for Data Access within virtualized Environments.

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  • 1. Don’t Let Inefficient Data Access Undermine Your Virtualization Goals
    Rob Steward
    VP, Research & Development
    DataDirect Technologies
  • 2. Agenda
    What do I mean by the term “Virtualization”?
    What is so great about it?
    What is not so great about it?
    How do I plan for Data Access in Virtualized Environments?
  • 3. What is Server Virtualization?
    Virtualization allows multiple operating system instances to run concurrently on a single computer; it is a means of separating hardware from a single operating system.
    This is what most of us think about when we hear the term Virtualization, but it is really more than this
  • 4. Types of Virtualization Technologies
    Hardware Virtualization
    VMWare ESX Server, Xen based technologies, Viridian (Windows Server 2008), etc.
    OS is fooled into thinking it’s on its own machine.
  • 5. Types of Virtualization Technologies
    OS Virtualization
    Solaris Zones, Virtuozzo, Windows Virtual Server, VMWare (free) etc.
    OS has a shell and runs other instances of itself or other OS.
  • 6. Types of Virtualization Technologies
    Application Virtualization
    Repackaging an application into one big “bundle” that runs under application virtualization software.
    The “bundle” contains ALL application dependencies.
    Thinstall, InstallFree, Xenocode, etc.
  • 7. Types of Virtualization Technologies
    Java VM Virtualization
    BEA LiquidVM runs directly on top of VMWare Hypervisor
    No Operating System at all!
  • 8. Types of Virtualization Technologies
    Many, many others including:
    Desktop virtualization (Citrix, Callista)
    Storage virtualization
    Network virtualization
    Data Virtualization - Logical to physical mapping
    Semantic mapping
  • 9. Fully Utilize Hardware
    IDC says server utilization averages 8-10%
    The average server spends most of its power consumption heating the room…
    Consolidate applications
    Decrease Power, Cooling, and Space requirements
    Decrease machine administration costs
    Increase Availability/Reliability
    Increase isolation for applications
    Failover capability
    What is so great about Virtualization?
  • 10. What do I hear from customers?
    The value of virtualization is real!
    Entire data centers are disappearing
    Test and Dev environments can also benefit greatly
    Management of many VMs can become difficult
    Installation, configuration, deployment, on a larger scale
    Performance of applications suffers if data access is not properly planned for these environments
    Data Access is a HUGE part of our overall application performance
    Bottlenecks in virtualized environments often end up in the database middleware
  • 11. What is not so great about Virtualization?
    “Virtual Server Sprawl”
    After years of consolidating onto single large machines, we are now creating many, many , smaller “machines”
    Keeping up with many more configurations can become a nightmare
  • 12. What is not so great about Virtualization?
    Software interoperability
    Some software is tied to individual machines or particular kinds of hardware
    Some vendors will not support their software in VM environments
    Where is my machine?
    Dynamic virtualization allows for virtual machines to move from one physical machine to another while running
    Test and Dev environments using VM images to “store” configurations for temporary use
  • 13. What is not so great about Virtualization?
    Application performance can suffer due to hardware constraints
    Network I/O
    Disk I/O
    The promise of
    Virtualization IS
    to make hardware
    the bottleneck!
  • 14. You need tools for managing virtual machines
    One big trend we see is setting up a complete OS stack to support a single application
    There are a lot of new tools on the market today to manage virtualization environments
    You will need to install and upgrade the same software many more times
    Even with base images, you have to keep up
    Difficult configuration of database clients multiplies already difficult problems of managing and maintaining a large set of Virtual Machines.
  • 15. Check with your software vendors before virtualizing
    Make sure the software supports the specific VM environment(s) you want to use
    Solaris Zones
    HP Partitions
    Red Hat EL 5
    Windows Server 2008 Hyper-V

  • 16. Choose your data access middleware carefully
    Data access middleware performance and scalability are even more key in VM environments
    With well tuned applications, 75%-95% of the time is spent in the data access middleware and on the network!
    Data access middleware needs to be tunable
    Runtime options to control network buffer sizes, etc. often need to be tweaked in VM environments
    Data access middleware can cause VM management nightmares
    Look for middleware that supports multiple database versions, has a small footprint, and requires little configuration
  • 17. How Database Middleware Works
  • 18. What’s really going on?
  • 19. Can data access middleware really affect performance?
  • 20. Oracle ODBC Example
    Even in the case where performance is similar, it can change dramatically on a VM
  • 21. Oracle ODBC Example
    Higher numbers mean more data processed with the same amount of CPU
  • 22. Oracle ODBC Example
    Lower numbers mean better scalability
  • 23. Oracle ODBC Example
    • In a virtualized environment, resource usage WILL have a larger impact on
    overall performance.
    • On a higher utilized machine, the competition’s driver is struggling due to resource contention with other VMs, but there is no difference with DataDirect
    • 24. The higher memory consumption and CPU usage have caused the application to bottleneck much sooner
  • Wrap Up
    Virtualization can produce real savings!
    Plan for “Server Sprawl”
    Make sure your software supports virtualization
    Choose and tune your data access middleware carefully in Virtualization environments
  • 25. Questions?