Consider the replicated system described in the previous problem.
a. What is the impact of replication on the performance of a read-only transaction?
b. What is the impact of replication on the performance of a transaction that both
reads and writes the data?
c. What is the impact of replication on the communication system?
a. Read-only transactions execute faster since they can read the closest replica.
b. Read/write transactions execute slower since they have to update replicas at several
sites.
c. Replication implies an increase in communication to update replicas, but a decrease
in communication to read the value of a replica.
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Modify the original Example 1 code so that the sender also receives a message from the receiver. You should only need one socket only in each process. Compile, run, and turn in your code; be sure to modify the comments accordingly.
This exercise guides you through experiments with connectionless datagram socket via code sample Example1. As a start, it is recommended that you run both programs on one machine, the host name of which you may refer to as “localhost”, as in the command “java Example1Sender localhost 12345 hello” to execute Example1Sender. You may optionally repeat the exercises by running the programs on separate machines, assuming that you have access to such machines.
The year you were born determines the generation you fit into
Indicate whether the statement is true or false
The duplicate master slide has a ________ to the left of its thumbnail in the slide pane
A) checkmark B) asterisk C) pushpin D) arrow
For the address 172.30.173.68/23, what is the binary conversion of the broadcast address?
A) 10101100 00011110 10101100 11111111 B) 10101100 00011110 10101101 11111111 C) 10101100 00011110 10101110 11111111 D) 10101100 00011110 10101111 11111111