Virtual Embraced Space ProbER

What VESPER is

• is to monitor the kernel state of guests on vm
• is to adopt the systemtap in structure, consisting of kernel modules to monitor or probe guest kernels, relayfs to output the result of monitoring & probing and UI to contorol the modules & output mentioned above
• is to provide valuable Use Cases for various clustering systems having live migration features

What VESPER is for

• prividing evaluation stuffs for system reliability & serviceability , which is used in decision-making for system switching or migration on cluster-ware.

• TATA Consultancy services : http://www.tcs.com/

The Structure of VESPER

The Image of VESPER

The Structure of VESPER

Work flow of VESPER

1. Management Tool in host requests the state of a guest to VESPER UI.
2. VESPER UI in control Layer generates SystemTapAgent with SystemTap, then requests to Loader/Un in Action Layer.
3. Loader/Un sends SystemTapAgent info to C-chan in Communication Layer.
4. C-chan of host will notify C-chan of the guest.
5. C-chan of guest will notify Loader/Un in Action Layer of the guest, with SystemTapAgent Info from the host.
6. Loader/Un in guest loads the SystemTapAgent to the guest kernel image.
7. The SystemTapAgent gathers information of the guest kernel state and write to Relay-like in Action Layer of the guest.
8. Relay-like of the guest sends the information to D-chan in communication layer of the guest.
9. D-chan of the guest will notify D-chan of the host.
10. D-chan of the host send the information to Relay-like in Action Layer of the host.
11. Relay-like of the host write the information to Relay of SystemTap of the host.
12. VESPER UI sends back to the information to the Management Tool.

Link

• Projects
  • SystemTap : http://sourceware.org/systemtap/
  • Xen : http://xen.org/
  • KVM : http://kvm.qumranet.com/kvmwiki/
  • Virtual Machine Manager : http://virt-manager.et.redhat.com/


• Others
  • Hitachi, Ltd. : http://www.hitachi.com/
• Systems Development Laboratory, Hitachi, Ltd. : http://www.sdl.hitachi.co.jp/english/index.html
• TATA Consultancy services : http://www.tcs.com/

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