'Does not mean transparent', in turn does not mean 'is not transparent'. The maintenance folk need access to the configuration, and have access to the individual units (nodes) even if the user can not see them. But it is not the multi-resource coordinating piece.Īnd the 'does not mean transparency to administrators' is taken in the same way as in a power grid - to the user of electricity, the source of the electricity (which gen station) is completely transparent, but to the administrator it is not transparent.
Īnd yes, Resource Manager is one of the technologies that may be used to CONTROL the resources in the RAC.
Therefore I request you quote the entire phrase and use it as intended. However, the database component of grid (that which uses several disparate resources to provide compute power to manipulate database) is called RAC. Specifically meaning that there are other components of grid, even in Oracle technology stack. Note that I said "RAC is Oracle's implementation of grid computing for the database'. That 'disconnectedness' is a hallmark of grid) There is certainly a much bigger disconnect these days between issuing the commands and knowing what those commands cause to happen than there used to be in version 6 or 7 days, for example. that would all mean implementing ASMM, ASSM, LMT, Resource Manager, ASM and the rest of the alphabet soup -but taken together, I think those technologies do (or at least try to!) make administration and maintenance mostly transparent. Certainly in the context of Oracle, I think grid very much means the DBA is oblivious to where data is stored, what instance is processing it, what memory configurations are needed to process it best, whether to create things with 1 extent or 1000 and so on. (Incidentally, I sort of disagree that grid 'does not mean transparency to the administrators'. Oracle has implemented a raft of technologies which, taken together and in combination, can approach the 'grid ideal'. Point is: I don't think it's right to say, 'RAC is Oracle's implementation of grid'. ASMM is an important grid component because it allows for the transparent switching in and out of additional memory to handle workloads. ASM is an important grid component, because it makes the physical storage of your data transparent. But Resource Manager is just as much an important component, since it allows the transparent switching in and out of instances to help process a given service load. RAC is merely one component of Oracle's implementation of grid computing. I'd argue, however, that you would have concluded that just a little too swiftly!
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