6.7

You can use the option to download content from the source published library immediately or only when
needed to manage your storage space.
n
When you synchronize a subscribed library that is set with the option to download all the contents of
the published library immediately, the process synchronizes both the item metadata and the item
contents. During synchronisation, the library items that are new for the subscribed library are fully
downloaded to the storage location of the subscribed library.
n
When you synchronize a subscribed library that is set with the option to download contents only when
needed, the process synchronizes only the metadata for the library items from the published library,
and does not download the contents of the items. This saves storage space. If you need to use a
library item you need to synchronize that item. After you are done using the item, you can delete the
item contents to free space on the storage. For subscribed libraries that are set with the option to
download contents only when needed, synchronizing the subscribed library downloads only the
metadata of all the items in the source published library, while synchronizing a library item downloads
the full content of that item to your storage.
You can take advantage of optimized transfer speed for synchronization between a published and a
subscribed library under certain circumstances.
n
If a published and a subscribed library belong to vCenter Server systems that are in the same
vCenter Single Sign-On domain, and both libraries use datastores as backing storage, transfer speed
for synchronization is faster. The transfer speed optimization is made possible if the libraries can
store their contents to datastores managed by ESXi hosts that are directly connected to each other.
Therefore, the synchronization between the libraries is handled by a direct ESXi host to ESXi host
transfer.
n
If the datastores have VMware vSphere Storage APIs - Array Integration (VAAI) enabled, the library
content synchronization between the published and the subscribed library is further optimized. In this
case, the contents are synchronized by a direct datastore to datastore transfer.
If you use a subscribed library, you can only utilize the content, but cannot contribute content to the
library. Only the administrator of the published library can manage the templates and files.
Table 4‑1. Source Objects to Which You Can Subscribe by Creating a Subscribed Library in
the vSphere Client .
Source Object Download library content immediately Download library content when needed
A library running in a vCenter Server 6.x
instance.
Supported Supported
A catalog running in a vCloud Director 5.5
and later instance.
Supported Not supported
A third-party library. Supported for third-party libraries that
require authentication, if the username of
the third-party library is vcsp. If the
username of the source third-party
library is different than vcsp, you can
subscribe to it by using VMware vCloud
Suite API.
Supported for third-party libraries that
require authentication, if the username of
the third-party library is vcsp. If the
username of the source third-party library
is different than vcsp, you can subscribe
to it by using VMware vCloud Suite API.
vSphere Virtual Machine Administration
VMware, Inc. 56