Why historical data storage matters in SCADA systems - See It in Action

Why Historical Data Storage Matters

📖 Scenario: You work with a SCADA system that monitors a factory's machines. The system collects data like temperature and pressure every minute. You want to store this data to check machine health over time and find problems early.

🎯 Goal: Build a simple program that stores machine data readings in a dictionary, sets a storage limit, filters data to keep only recent important readings, and then shows the stored data.

📋 What You'll Learn

Create a dictionary called machine_data with exact timestamp keys and temperature values

Add a variable called storage_limit set to 3 to limit stored entries

Use a dictionary comprehension to keep only the latest storage_limit entries in machine_data

Print the final machine_data dictionary

💡 Why This Matters

🌍 Real World

Factories and plants use SCADA systems to monitor machines continuously. Storing historical data helps detect problems early and plan maintenance.

💼 Career

Understanding how to manage and filter data storage is important for DevOps engineers working with monitoring and logging systems in industrial environments.

1

Create initial machine data dictionary

Create a dictionary called machine_data with these exact entries: '2024-06-01 10:00': 75, '2024-06-01 10:01': 77, '2024-06-01 10:02': 76, '2024-06-01 10:03': 78, '2024-06-01 10:04': 79

SCADA systems

# Create the machine_data dictionary with exact timestamps and temperatures
# Your code here

Need a hint?

Use curly braces to create a dictionary with the exact keys and values.

2

Set storage limit for data entries

Add a variable called storage_limit and set it to 3 to limit how many data entries we keep.

SCADA systems

machine_data = {
    '2024-06-01 10:00': 75,
    '2024-06-01 10:01': 77,
    '2024-06-01 10:02': 76,
    '2024-06-01 10:03': 78,
    '2024-06-01 10:04': 79
}
# Set storage_limit to 3
# Your code here

Need a hint?

Just create a variable named storage_limit and assign the number 3.

3

Keep only the latest data entries

Use a dictionary comprehension to update machine_data so it keeps only the last storage_limit entries based on timestamp order.

SCADA systems

latest_keys = sorted(machine_data.keys())[-storage_limit:]
machine_data = {k: machine_data[k] for k in latest_keys}
# Print the machine_data dictionary

Need a hint?

Sort the keys, slice the last storage_limit keys, then build a new dictionary with those keys.

4

Display the stored machine data

Write a print statement to display the final machine_data dictionary.

SCADA systems

Need a hint?

Use print(machine_data) to show the dictionary.