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#include <iostream> #include <vector> #include <string> enum RaidLevel { RAID0, RAID1, NUM_RAID_LEVELS }; class RAID { public: virtual void writeData(const std::string& data) = 0; virtual std::string readData() const = 0; virtual ~RAID() = default; }; class RAID0 : public RAID { public: RAID0(int numDisks) : numDisks(numDisks) { disks.resize(numDisks); } void writeData(const std::string& data) override { for (int i = 0; i < numDisks; ++i) { disks[i] = data.substr(i * (data.size() / numDisks), data.size() / numDisks); } } std::string readData() const override { std::string result; for (const auto& disk : disks) { result += disk; } return result; } private: int numDisks; std::vector<std::string> disks; }; class RAID1 : public RAID { public: RAID1(int numDisks) : numDisks(numDisks) { disks.resize(numDisks); } void writeData(const std::string& data) override { // Write to the first disk and mirror it to others disks[0] = data; for (int i = 1; i < numDisks; ++i) { disks[i] = disks[0]; } } std::string readData() const override { // Data from the first disk (mirrored) return disks[0]; } private: int numDisks; std::vector<std::string> disks; }; void simulateRaid(RaidLevel level, const std::string& data) { std::unique_ptr<RAID> raid; if (level == RAID0) { raid = std::make_unique<RAID0>(2); // Example with 2 disks } else if (level == RAID1) { raid = std::make_unique<RAID1>(2); // Example with 2 disks } if (raid) { raid->writeData(data); std::cout << "Read data from RAID level " << level << ": " << raid->readData() << "\n"; } } int main() { std::string data = "This is sample data for RAID simulation."; std::cout << "Simulating RAID 0:\n"; simulateRaid(RAID0, data); std::cout << "Simulating RAID 1:\n"; simulateRaid(RAID1, data); return 0; } |
Explanation
- Enums:
- RaidLevel: Enum representing different RAID levels (RAID 0, RAID 1).
- Class
RAID
:- Purpose: Abstract base class for RAID implementations.
- Methods:
writeData(const std::string& data)
: Pure virtual method for writing data.readData() const
: Pure virtual method for reading data.
- Destructor: Virtual destructor to ensure proper cleanup of derived classes.
- Class
RAID0
:- Purpose: Implements RAID 0 (striping) which splits data across multiple disks.
- Methods:
writeData(const std::string& data)
: Splits the data evenly across the disks.readData() const
: Concatenates the data from all disks.
- Attributes:
numDisks
: Number of disks in the RAID array.disks
: Vector to store the data for each disk.
- Class
RAID1
:- Purpose: Implements RAID 1 (mirroring) which duplicates data across all disks.
- Methods:
writeData(const std::string& data)
: Writes data to the first disk and mirrors it to others.readData() const
: Reads data from the first disk.
- Attributes:
numDisks
: Number of disks in the RAID array.disks
: Vector to store the data for each disk.
- Function
simulateRaid(RaidLevel level, const std::string& data)
:- Purpose: Simulates RAID level operations.
- Parameters:
level
: RAID level to simulate (RAID 0 or RAID 1).data
: Data to write and read from the RAID array.
- Implementation:
- Creates an instance of the appropriate RAID class.
- Writes and reads data using the RAID instance.
- Outputs the result.
- Main Function:
- Setup: Defines sample data to use in the simulation.
- Simulation:
- Simulates RAID 0 and RAID 1 by calling
simulateRaid
with the data.
- Simulates RAID 0 and RAID 1 by calling
Usage
- RAID Simulation: Demonstrates basic operations of RAID 0 (striping) and RAID 1 (mirroring).
- Data Handling: Shows how data is managed and retrieved in different RAID configurations.