Question
Problem 1 Suppose that a disk has storage capacity of 1TB and a block size of 4096 bytes. We have a table with 100,000 records
Problem 1
Suppose that a disk has storage capacity of 1TB and a block size of 4096 bytes. We have a table with 100,000 records each record has a size of 2050 bytes. Answer these questions:
What is the total capacity of RAID 0 with 10 drives?
What is the total capacity of RAID 5 with 10 drives?
How many blocks are needed for spanned and unspanned records, respectively?
What is the block (space) utilization in both cases?
Assume that the disk has a read bandwidth of 1 GB/sec. Suppose that data is stored sequentially. What is the time to read all records in the unspanned configuration?
If records do not exactly fit in a block, we have two choices: (i) Waste the space at the end of each block and (ii) Start a record at the end of a block and continue on the next. Choice (i) is the unspannedoption. Choice (ii) is the spanned option.
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Advances In Databases And Information Systems Associated Workshops And Doctoral Consortium Of The 13th East European Conference Adbis 2009 Riga Latvia September 2009 Revised Selected Papers Lncs 5968
Authors: Janis Grundspenkis ,Marite Kirikova ,Yannis Manolopoulos ,Leonids Novickis
2010th Edition
3642120814, 978-3642120817
