Random read - PowerPoint PPT Presentation

Main Memory

Main Memory. The last level in the cache – main memory hierarchy is the main memory made of DRAM chips DRAM parameters (memory latency at the DRAM level): Access time : time between the read is requested and the desired word arrives

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VSAM ACCESS METHODS

VSAM ACCESS METHODS. Sequential Start at the beginning of the file and read the records in sequence by either a primary key or a foreign key (Alternate Index) Random Read a particular record from the file (usually by primary key) Dynamic

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681 views • 14 slides

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