Advantages

Using multiple cells has the following advantages: Isolation of hardware failure

If one cell goes offline due to hardware problems, the others can still process client requests. Isolation of software failure

Running an application in two or more cells isolates any problems that occur within a cell, while the other cells continue to handle client requests. This can be helpful in a variety of situations: When rolling out a new application or a revision of an existing application. The new application or revision can be brought online in one cell and tested in a live situation while the other cells continue to handle client requests with the production version of the application. When deploying a new version of the IBM® WAS software. The new version can be brought into production and tested in a live situation without interrupting service. When applying fixes or patches to the IBM® WAS software. Each cell can be taken offline and upgraded without interrupting the application. If an unforeseen problem occurs with new software, using multiple cells can prevent an outage of an entire site. A rollback to a previous software version can also be accomplished more quickly. Hardware and software upgrades can be handled on a cell-by-cell basis during off-peak hours.

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