| Ephemeral storage | Block storage | Object storage | |
|---|---|---|---|
|
Used to… |
Run operating system and scratch space |
Add additional persistent storage to a virtual machine (VM) |
Store data, including VM images |
|
Accessed through… |
A file system |
A block device that can be partitioned, formatted and mounted (such as, /dev/vdc) |
REST API |
|
Accessible from… |
Within a VM |
Within a VM |
Anywhere |
|
Managed by… |
OpenStack Compute (Nova) |
OpenStack Block Storage (Cinder) |
OpenStack Object Storage (Swift) |
|
Persists until… |
VM is terminated |
Deleted by user |
Deleted by user |
|
Sizing determined by… |
Administrator configures size settings, known asflavors |
Specified by user in initial request |
Amount of available physical storage |
|
Example of typical usage… |
10 GB first disk, 30GB second disk |
1 TB disk |
10s of TBs of dataset storage |
我看Openstack的临时(Ephemeral)存储和块(Block)存储,布布扣,bubuko.com
我看Openstack的临时(Ephemeral)存储和块(Block)存储
原文：http://blog.csdn.net/cloudresearch/article/details/22619203