22IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
structure and algorithms that the DS6000 uses, are factors that improve the I/O performance.
The significance of this benefit will mostly be determined by the type of workload that is run.
In the DS6000 there is 4 GB of fixed cache. This cache is divided between the two servers of
the DS6000, giving the servers their own non-shared cache.
To protect the data that is written during the I/O operations, the DS6000 stores two copies of
the data: One in the cache and another in its persistent memory.
2.5.2 Persistent memory
The persistent memory is used to store a second copy of the ...
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