1. Xclone
Fastest VM Provisioning
Xclone

3. What we do？
• Environment
o 6 physical hosts(CPU:12, Memory:16GB）
• Requirement
o Deploy 100 serengeti VMs in 30 minutes
o Make it as fast as possible

4. Why we do it？
• VMware use it everyday
• Hybrid Cloud
• Distributed App
• Only Automation ?
• Fast

5. Naive Solution
Host
Disk
Mem
Host
Disk
Mem
Host
Disk
Mem
Host
Disk
Mem
Host
Disk
Mem
Host
Disk
Mem
VM
VMVMVMVMVM

6. Problem Analysis
• Full Clone
o Resource Usage
o Time Cost: ~3 minutes
o Naïve Solution：3 *（5 + 100/6) = 66 minutes
Metrics Value
cpu <2%
memory 200M
disk 40MB/s
network 80-100MB/s

7. Problem Analysis
• Linked Clone
o Time Cost: ~10 seconds
o Naive Solution:
 3*5 + 10*(100/6)/60 + delta = 18~22 minutes
• Shortcomings
o Must in one host

8. Problem Analysis
• Hardware Performance Test
•
Metrics Value
Disk read 25MB/s
Disk write 50MB/s
Network ~100MB/s

9. Problem Analysis
• Key Decision
o Full clone in multi-host, linked clone in inner host
 linked clone much faster
o Use tree clone
 disk bottleneck
 single srcVM lock

10. Our Solution(Algorithm)
VM
VM
VM
VMVM
VM

11. Our solution（Architecture）
UI
Deploy Algorithm
Information collector Infrastructure Ops
VC API

12. Test Result
0
10
20
30
40
50
60
70
time(minutes)

13. Future work
• Ramdisk
• Infrastructure Aware Deployment（Disk &
Network）
• Full Clone Optimization

14. Our code & docs
Codes on: Git: https://github.com/linvictor88/Xclone
Docs:
Plan Edit Doc:https://docs.google.com/a/vmware.com/document/d/1eoD5X2B4hBI69eFlkV671n1QFz-
Pggy14UZTyeG0YjI/edit#heading=h.84hu40wudn8o
Plan pub: https://docs.google.com/document/d/1eoD5X2B4hBI69eFlkV671n1QFz-Pggy14UZTyeG0YjI/pub
Status Edit
Doc:https://docs.google.com/a/vmware.com/document/d/1gg_7zw9ZJwiqR_wQSnwOMqn1Zk1aTxeZgEne
0AwQUvc/edit#heading=h.vlkvaq5eerus
Status
pub:https://docs.google.com/a/vmware.com/document/d/1gg_7zw9ZJwiqR_wQSnwOMqn1Zk1aTxeZgEne
0AwQUvc/pub
Cloning research
Doc:https://docs.google.com/a/vmware.com/document/d/1rqD8pmG6So3ARA4YD9Hd6Ut0q9ROAZ7K_qG
V4Xr8k4U/edit#
Cloning research pub:
https://docs.google.com/document/d/1rqD8pmG6So3ARA4YD9Hd6Ut0q9ROAZ7K_qGV4Xr8k4U/pub
Xclone Code Design
https://docs.google.com/a/vmware.com/document/d/17zMxuN4EjpyRkAMarahvlEyTjsb3hQmG-
O4NMQmAk40/edit

15. Learned Lessons
• Teamworking
• Source code management

16. Thanks
• Junping Du
• Xinhui Li
• Yang Liu
• Terry Li