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ACID vs BASE Transactions

ACID vs BASE Transactions

ACID vs BASE Transactions

ACID vs BASE Transactions

ACID vs BASE Transactions

ACID vs BASE Transactions

ACID vs BASE Transactions

ACID vs BASE Transactions

Consistency Models

ACID and BASE represent opposing philosophies for database consistency. ACID guarantees strict consistency while BASE prioritizes availability.

ACID Properties

Atomicity, Consistency, Isolation, Durability:

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\-- ACID transaction example

BEGIN TRANSACTION;

UPDATE accounts SET balance = balance - 100 WHERE account_id = 1;

UPDATE accounts SET balance = balance + 100 WHERE account_id = 2;

COMMIT;

BASE Properties

Basically Available, Soft state, Eventual consistency:

class EventualConsistentLedger:

def init(self):

self.pending = []

def transfer(self, sender, recipient, amount):

self.pending.append({

"sender": sender, "recipient": recipient,

"amount": amount, "timestamp": time.time()

})

return {"status": "accepted"}

def reconcile(self):

for tx in self.pending:

self.apply_transaction(tx)

When to Relax ACID

| Requirement | ACID | BASE | |-------------|------|------| | Consistency | Strong | Eventual | | Availability | Lower | Higher | | Latency | Higher | Lower | | Use case | Financial | Analytics |

Conclusion

Choose ACID where correctness is critical and BASE where scale matters. Modern databases increasingly blur the line. Understand your consistency requirements and choose accordingly.

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