To effectively use the massively parallel processing (MPP) architecture with a SQL pool, you need to understand table geometries. Table geometries specify how data is sharded into distributions on your existing compute nodes. These table…
The persistent batching, incremental loading, streaming, inserting, or updating of data increases the amount of data over time. If you want to move your in‐house data consisting of many gigabytes, terabytes, or petabytes of data…
For customers who have an existing solution based on Apache Kafka for HDInsight and want to move it to Azure, this is the product of choice. From a Microsoft perspective, the same solution can be…
%%pysparkdf = spark.read \ .load(‘abfss://[email protected]/SessionCSV/…ODE_FREQUENCY_VALUE.csv’, \ format=’csv’, header=True)df.write \ .partitionBy(‘SCENARIO’).mode(‘overwrite’).csv(‘/SessionCSV/ScenarioPartitions’)data = spark.read.csv(‘/SessionCSV/ScenarioPartitions/SCENARIO=PlayingGuitar’)data.show(5) The code snippet is available in the Chapter04/Ch04Ex02 directory on GitHub, in a file named partitionSpark.txt. The output resembles Figure 4.4. FIGURE 4.4…
The ISFIRST analytic function returns a 1 if the event is the first event in the stream for the defined interval; otherwise, it returns 0. The implementation of the tumbling window function is performed as…
As shown in Table 3.20, the built‐in functions are further categorized into groups such as aggregate, analytic, conversion, date, mathematical, and windowing. TABLE 3.20 Azure Stream Analytics built‐in functions Type Functions Aggregate AVG, COUNT, MIN,…
FIGUER 3.78 Provisioning an Azure Stream Analytics job Consider testing the connection from the Azure Stream Analytics job and the event hub by pressing the Test menu option on the Input blade. The configuration of…
It is possible to create an additional policy with fewer rights. The RootManageSharedAccessKey policy has full access. You might consider creating a policy with the minimum access necessary, perhaps Send Only. It depends on your…
The word topology is common in IT. The concept is often experienced in the context of a network topology. It is simply the arrangement of interrelated parts that constitute the whole. The same definition can…
A sliding window is illustrated in Figure 3.82 and implemented using the following SQL snippet: SELECT READINGTYPE, COUNT(*) as CountFROM brainwaves TIMESTAMP BY CreatedAtGROUP BY READINGTYPE, SlidingWindow(second, 10)HAVING COUNT(*)> 3 The second parameter represents the…