EXPLAIN WHERE YOU FIND THE The database has 500000 million records A database must store an employee table consisting of 100000records each of which is 80bytes long. Answer the following questions by assuming these congurations/parameters: B = 512bytes, interblock gap size G = 128bytes, numberof blockspertrack = 256, numberof trackspersurf ace = 400. The disk has 8 platters each with two heads (only one head can read at a time of all 16 heads), rotates at 7200rpm, has a track − to − trackseektime(m) of 1ms, s = 12ms, r = 4.16ms, and btt = 0.03255ms.   1. How many records can be stored per block (blocking factor) using spanned and unspanned congurations? 2. What is the utilization (%) for the unspanned conguration? 3. If the le is physically ordered, what is the average time in milli second to read a record in each conguration?

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Types of database architectures

A Database Architecture represents the Database Management System’s (DBMS) design (schema). The DBMS architecture makes it easy to understand the components involved in the database system and their relations. The DBMS architecture may vary based on the system on which it runs. Some systems contain both client and server machines whereas some run only on a server machine. Based on the architecture, the system can be classified as centralized, decentralized, or hierarchical.