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Technological Overview
Published in Peng Liu, Wang Chao, Computational Advertising, 2020
Flume is one of the more commonly used open source solutions for such data transfer tools. Flume is a highly available, highly reliable, distributed mass log collection, aggregation, and transmission system provided by Cloudera. It supports the customization of various data senders in the log system for the distributed collection and summary of log data. Flume provides the ability to collect data from the console, RPC (Thrift-RPC), text, Tail (UNIX Tail), log system (syslog), support TCP and UDP mode, command execution (exec), and other data sources. Flume also provides the ability to perform simple processing of the data and output it to various data receivers. If the advertising machine USES the system log mode to record the log of putting, clicking, and so on, it is very convenient to configure Flume to transfer the log to Hadoop.
Experiments on Synchronization Mechanisms
Published in Rui Valadas, OSPF and IS-IS, 2019
ADDITIONAL EXPERIMENT - An experiment that is very easy to perform and triggers the transmission of delete indications is the clearance of the ospf process at a router without switching it off. Again in the network of Figure 10.31, (i) start all routers at the same time, (ii) install a Wireshark probe at the shared link with an ospf filter, and (iii) enter the command clear ip ospf process in the privileged EXEC level.
Reduced O3 subsequence labelling: a stepping stone towards optimisation sequence prediction
Published in Connection Science, 2022
Suppose Compiler is a function that generates the executable of a given program prog with an optimisation sequence being applied by using compiler C, and Evaluator is another function that evaluates the performance of a given executable exec with specific input data in on a specific hardware platform, as indicated in Equation (4). The definition of performance can refer to a metric, such as the time elapsed (or the energy consumed) during the execution, the size of the executable, or even the combination of multiple metrics; in most scenarios, execution time is regarded as the performance metric, where the lower execution time, the higher performance. By taking the result of Compiler into Evaluator, we can derive a fitness function that judges how good an optimisation sequence is for a given program prog with specific inputs in, as shown in Equation (5). Finally, the OPT problem can be defined in Definition 2.1, and it is considered an optimisation problem which can be solved using evolutionary computation.