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Chapter 10. dCache Partitioning

Patrick Fuhrmann

There are various parameters in the dCache PoolManager subsystem, determining the system behaviour on particular events. These are e.g. the cost threshold at which the PoolManager initiates pool to pool transfers to smooth the overall system cost, or the balance between performance and disk space related costs to optimize request distribution among data pools. In pre 1.7.0 releases, those parameters were applied to the a whole dCache instance. Starting with 1.7.0 a defined set of parameters (see next section) can have different values for different sections of the complete dCache instance. dCache provides a web page, listing section, assigned parameters and inheritance information.