5.2

Table 14-3. Deduplication and Compression Settings for Data Transfers
Setting Description
Use deduplication for Local Mode operations Prevents redundant data from being sent from client
computers to the datacenter. Deduplication operates on
transfers from the client computer to the datacenter,
including replications and desktop check-ins. Deduplication
does not take place when desktops are checked out.
With deduplication, the client computer detects identical
blocks of data and sends a reference to the original block
instead of sending the entire block again.
Deduplication is valuable on slow networks because it saves
network bandwidth. However, deduplication can add to the
CPU workload on the client computer when it checks for
identical data blocks and to the I/O workload on View
Transfer Server when it reads duplicate blocks from disk. On
fast networks, it might be more efficient to disable
deduplication.
The default is not to use deduplication.
Use compression for Local Mode operations Compresses system-image and desktop files before sending
them over the network.
Like deduplication, compression saves bandwidth and
speeds up transfers over slow networks. However, View
Transfer Server uses additional computing resources to
compress files. When you decide whether to use
compression, you must weigh the benefits in network
performance against the cost in server computing.
The default is not to use compression.
Setting Security Options for Local Desktop Operations
You can set the level of security of transfer operations by using SSL encryption and tunneled connections
between the client computers that host local desktops and the datacenter.
Table 14-4 shows the security settings for local desktop operations. Not using SSL or tunneled connection
increases data-transfer speed at the expense of secure data communication.
The SSL settings do not affect local data on the client computers, which is always encrypted.
The
data disk stored locally on client systems is encrypted using a default encryption strength of AES-128. The
encryption keys are stored encrypted on the client system with a key derived from a hash of the user's
credentials (username and password or smart card and PIN). On the server side, the key is stored in View
LDAP. Whatever security measures you use to protect View LDAP on the server also protect the local mode
encryption keys stored in LDAP.
VMware Horizon View Administration
324 VMware, Inc.