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Computers and Technology, 22.04.2020 00:32 scottcourtney460
For file IO with buffering, consider the following statistics for a benchmark. The ï¬le was read using the program here with standard output redirected to /dev/null. The ï¬le system used for this test was the Linux ext4 ï¬le system with 4,096-byte blocks. Which one of the following statements is NOT correct?A. This accounts for the minimum in the system time occurring at the few timing measurements starting around a BUFFSIZE of 4,096.B. Increasing the buffer size beyond this limit of a BUFFSIZE of 4096 has little positive effect. C. Most ï¬le systems support some kind of read-ahead to improve performance. D. When sequential reads are detected, the system tries to read in more data than an application requests, assuming that the application will read it shortly. E. The effect of read-ahead can be seen here, where the elapsed time for buffer sizes as small as 32 bytes is as good as the elapsed time for larger buffer sizes. F. Bigger the buffer size means better in performance evidenced in this statistics.
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For file IO with buffering, consider the following statistics for a benchmark. The ï¬le was read usi...
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