Eucalyptus offers SAN support for Eucalyptus block storage (EBS). Eucalyptus directs the Storage Controller (SC) to manage any supported SAN devices. Eucalyptus automatically creates and tears down volumes, snapshots, and data connections from guest instances. The administrator does not need to pre-allocate volumes or LUNs for Eucalyptus.
The size of Walrus storage must be larger than the sum of all the uploaded images. Each uploaded image requires additional space to accommodate image decryption and the creation of temporary working files.