Listbox Data Virtualization and Multi-Select Lists
Listbox data virtualization and multi-select lists are two popular methods for doing data integration for multiple users. Using this technique, you can move from a single server to more than one server and still be able to do the work you need without hindering the other users.
Let’s start with a discussion of the two approaches to taking your data across multiple users and sharing it in the same database. Multi-select lists are an effective way to do so by dividing your data into multiple sets that each have a different set of attributes. Each set has its own indexes and statements on the data are processed differently.
In the first approach, listbox data virtualization and multi-select lists, the database is divided into multiple groups of users. Each group is mapped onto a group-membership server, which hosts the central object. Your database still runs on the primary server, but you share the information through the server where the tables are replicated. The server acts as a mediator between the groups and the rest of the database.
Each group is a completely separate application with its own memory, storage, and external resources. It can talk to the rest of the database as if it were part of the data source instead of the master. You still can map to the main database as long as you control the cluster.
Using the second approach, listbox data virtualization and multi-select lists, we use a single database for all groups. In this case, we use a copy of the same database, but it is mapped onto the servers where the groups are hosted. The group nodes on these servers will always be directly connected to the data source.
Groupscan be instantiated with commands or scripts. In each instance, the same group will run under different names, therefore, the database would be consistent. In other words, it would be just like running it on a single database, except that it would be running on different servers, thus, keeping the data virtualization consulting in Boston . This works for groups that have different sizes, but it can also be used for groups that only have a few users.
The first step is to create groups. Groups are just objects with attributes and properties. We use objects to partition a set of data and then write the partitions in separate containers. Then, the actual groups are created and they’re mapped to the appropriate server.
The second step is to create views, which gives you the ability to view groups as separate entities instead of a set of groups. The user should not have access to the group objects. They are created for the purpose of visibility. The user can see the group objects as members, members-only, or only group, but he/she can’t do anything else with them.
As groups are isolated, multiple users can join the same group, although only one member can be listed at a time. As multi-select lists allow the user to select the entire set of groups as a single entity, multiple users can select the groups in different orders. For example, a user could select the companies first, then all companies, then all departments.
Virtualization is very important here. The groups are isolated from the rest of the application, so each of them is in its own container and the logical database that map to the groups is isolated from the rest of the databases.
The third step is to build the view and model visualization. The view will display the object and each group, whereas the model visualization will map the model to the view. Each grouping of the groups will have its own partitioned logical database.
When each group has been isolated, you can easily combine the results of group contents from both the view and model visualization to obtain information about the groups. that need to be looked up.