Since a server node can assume the role of a primary or backup, three different contexts were defined: MAIN, PRIMARY, and BACKUP.
The MAIN context represents a configuration context where the server node is set up to operate as a primary (the PRIMARY context is activated) or backup (the BACKUP context is activated).
At the Fukushima Daiichi ("Number One") plant in northeastern Honshu, Japan, a loss of main and backup power after an earthquake and tsunami led to a partial meltdown of fuel rods in three reactors.
Traditional power systems usually have main and backup protections for every local plant.
The main and backup channels are then interchanged according to the spectrum dynamics incurred due to PU activity.
Table 1 Global exceptions and the contexts in which they need to be handled Exception Context Meaning PrimaryFailedException MAIN, PRIMARY Internal primary server error PrimaryExistsException MAIN Indicates the existence of a primary server BackupFailedException MAIN, PRIMARY, BACKUP Internal backup server error BackupJoinedException PRIMARY Indicates that a new backup has joined in the group.
If you plan on going all out, you'll need the drums ($80), two guitars ($120), a bass ($60), say two mics for main and backup vocal duties ($80), and of course, the damn game ($60).
Such a personalization is applied if the routes that satisfy the requested characteristics exceed the capacity of the main and backup routes lists and the parameters of the maximum acceptable walking distance, the acceptable transportation means types and the maximum acceptable number of transportation means to be used in a route are equally satisfied and that's why prioritization cannot be given.
By conducting an uncertainty analysis, it was found that the assumption about the correlation of the probability parameters between the main and backup reactor shutdown systems (RSSs) is sensitive to the mean value of the frequency of the core damage caused by reactor shutdown failure.
Two DiGiCo D5 digital mixing consoles served as main and backup for the main audience sound, and two Yamaha PM1Ds handled main and backup duties for monitor mixing.
