Docker（1）

docker advantage

1. Faster delivery and deployment;

2. Higher virtualization (no additional hypervisor support is required, it is kernel-level virtualization to achieve higher performance and efficiency);

3. Easier migration and expansion;

4. Easier management

 Compared with traditional virtual machines

characteristic	container	x virtual machine
start up	seconds	minute level
hard drive usage	Usually MB	Usually GB
performance	j is close to native	weaker than
system support	Single machine supports thousands of containers	Usually dozens