Specifications

DeTOS 7 Administration Manual
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3.0 Persistence
3.1 About Persistence
3.1.1 Definition
Persistence, within the scope of thin client computing, refers to the continuing existence of connections and settings after
a terminal has been rebooted.
3.1.2 Default Behavior
By default, or after resetting your terminal to default factory setting, DeTOS is set to persistent mode. This means that any
configuration change you make will persist across reboots. You can change this to a stateless mode where the thin client
settings and connections are dynamically “pulled” from the management server, or a snapshot mode where you define the
desired configuration and prevent users from making any changes. These options are all configured in the DeTOS
Control Panel, under the System Settings, in a section called Local Storage.
3.2 Persistence in DeTOS Thin Clients
Devon IT offers two strategies for achieving persistence on DeTOS-based thin clients:
3.2.1 Strategy #1: Maintain Profiles via Remote Management Server
DeTOS thin clients can be centrally managed using Devon IT’s Echo Thin Client Management Software. Using Echo,
administrators can create several connections and settings and then group them together to form one single collection
called a profile. This profile can then be pushed or assigned to one or more thin clients using a web browser. With your
profile properly configured, each time a terminal is booted up and discovered by Echo, all connections and system
settings according to its assigned profile are immediately applied – or “pushed” out – to that terminal.
3.2.2 Strategy #2: Allow Configurations to be Stored Locally on the Terminal
The second approach for achieving persistence is to allocate a specific area of the local DOM for reading and writing of
system settings and connections. DeTOS not only provides for this type of feature, but actually allows for even greater
flexibility by offering two variations of this strategy:
Enable Local Storage: While running in this mode, DeTOS will write to the local DOM each and every time
configurations are added, deleted or modified under the DeTOS Control Panel.
Note – By default, this is the selected mode for brand new or recently reflashed DeTOS thin clients.
Enable Snapshot Storage: When this mode is selected, DeTOS allows writes to the local DOM, but in a more
finely controlled manner. An administrator can configure the settings and then store the current configurations to
the DOM by clicking Take Snapshot. The only settings and connections that will persist across reboots are the
ones captured during the snapshot. The terminal essentially falls back into a non-persistent operating mode after
the snapshot and discards any new configurations from here on out – until the administrator clicks Take
Snapshot again, and a new snapshot is used as the primary configuration. In some ways, this mode can be
thought of as a hybrid of the standard Enable Local Storage and No Local Storage modes.