.NET/ASP.NET/C#/VB.NET PDF Document SDK

You can optionally provide two extra arguments to getPermission(). If the permission deals with accessing a network, like ApplicationPermissions.PERMISSION_INTERNET, it s possible that a domain-specific permission may be in effect. For example, a user might ordinarily set connections to Prompt , but allow all connections to www.google.com. You can pass in the domain you plan to connect to learn what its setting is, as shown in the following example.

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Next, select the drives you want included in the LUN----simply click in the box that represents each drive in the Step 2 diagram of Figure 4-10. If you wish to begin writing data onto the Xsan during the drives initialization period, leave the background initialization option enabled. With drives used in an Xsan environment, we prefer to leave the Use drive cache option enabled. Check this box and then click the Create Array button. TIP: With most Xserve RAIDs, fully formatting the drives takes 36 to 72 hours. If you ll be working on the Xsan during its first day and a half of deployment, you might want to consider using the background initialization option. The performance of the Xsan won t be optimal during the initialization process, but that s the only issue with the feature.

Yes, we said it, Ethernet But why do you need to worry about a bunch of category 5e or 6 cables if you have fiber now Because in an Xsan environment, we use the Fibre Channel environment only for streaming actual data We need a dedicated network for command and control This means that most Xsan clients will have two Ethernet networks The first is the standard corporate LAN, which allows for managing network and storage devices, directory services data, and network volumes It also provides general IP connectivity The second Ethernet network is dedicated to metadata An Xsan client uses this network to communicate with an Xsan metadata controller to request access to an existing asset or ask for access to write data The MDC is responsible for informing the Xsan client about where data will be streamed to a drive.

int domainSpecificSetting = permissions.getPermission( ApplicationPermissions.PERMISSION_SERVER_NETWORK, "securesite.example.com");

Normally, when using the previous HTML form-submit technique, the browser manages the extraction of the state from the HTML form It is more complicated to perform a custom extraction, but it does give the added benefit of being able to extract the state from other HTML elements, such as div or span elements You need to think of a GET method call as a general state extraction that is assigned to a JavaScript object When the JavaScript object that contains the state has been created, you need to convert the object into a computer graphics interface (CGI)-encoded query string The function OpsserializeCGI carries out the conversion Again, you need to perform a custom serialization, but you have the added flexibility of serializing to a CGI-encoded query string, a persisted JavaScript Object Notation (JSON), or even an XML string.

Whenever a SAN client wants to access a SAN resource, it must first request that resource from the SAN s active MDC This prevents conflicts with other clients on the SAN The metadata controller is responsible for ensuring the data integrity of the volume and the filesystem objects on it Because a lot of IO requests may be occurring concurrently, it s critical that the metadata network be very fast and have minimal latency Nearly every operation performed on an Xsan requires filesystem queries, so any latency introduced between the Xsan clients and MDCs will result in perceivable performance degradation on the volume This can become particularly problematic if you use your SAN for basic fileserver storage and it contains mostly smaller files This means you need a good switch Most often you ll use a managed switch with the management features disabled (especially spanning-tree PortFast).

Starting with device software version 4.7, you can also provide a boolean indicating whether to ignore the current setting of the firewall. Firewalls are discussed in more detail later in this chapter; for now, be aware that unless you specify true here, ApplicationPermissionsManager will allow the firewall setting to override the actual permission that the user has set. You generally do want to take the firewall into account, since you likely care most about the actual behavior for a request you would make and not just what is shown on the permissions screen. Only set true here if you need to know the actual underlying setting.