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---
title: "Apache Ignite Architecture Series: Part 1 - When Multi-System Complexity Compounds at Scale"
author: "Michael Aglietti"
date: 2025-11-25
tags:
- apache
- ignite
---
p Apache Ignite shows what really happens once your #[em good enough] multi-system setup starts cracking under high-volume load. This piece breaks down why the old stack stalls at scale and how a unified, memory-first architecture removes the latency tax entirely.
<!-- end -->
p Your high-velocity application started with smart architectural choices. PostgreSQL for reliable transactions, Redis for fast cache access, custom processing for specific business logic. These decisions enabled initial success and growth.
p But success changes the game. Your application now processes thousands of events per second and customers expect microsecond response times. Real-time insights drive competitive advantage. The same architectural choices that enabled growth now create performance bottlenecks that compound with every additional event.
p.
#[strong At high event volumes, data movement between systems becomes the primary performance constraint].
hr
h3 The Scale Reality for High-Velocity Applications
p As event volume grows, architectural compromises that once seemed reasonable at lower scale become critical bottlenecks. Consider a financial trading platform, gaming backend, or IoT processor handling tens of thousands of operations per second.
h3 Event Processing Under Pressure
p #[strong High-frequency event characteristics]
ul
li Events arrive faster than traditional batch processing can handle
li Each event requires immediate consistency checks against live data
li Results must update multiple downstream systems simultaneously
li Network delays compound into user-visible lag
li #[strong Traffic spikes create systemic pressure] — traditional stacks drop connections or crash when overwhelmed
p #[strong The compounding effect]
ul
li At 100 events per second, network latency of 2ms adds minimal overhead.
li At 10,000 events per second, that same 2ms latency creates a 20-second processing backlog within system boundaries.
li During traffic spikes (50,000+ events per second), traditional systems collapse entirely, dropping connections and losing data when they're needed most.
p The math scales against you.
hr
h3 When Smart Choices Become Scaling Limits
p #[strong Initial Architecture, works great at lower scale:]
pre.mermaid.
flowchart TB
subgraph "Event Processing"
Events[High-Volume Events<br/>10,000/sec]
end
subgraph "Multi-System Architecture"
Redis[(Cache<br/>Session Data<br/>2ms latency)]
PostgreSQL[(Relational DB<br/>Transaction Data<br/>5ms latency)]
Processing[Custom Processing<br/>Business Logic<br/>3ms latency]
end
Events --> Redis
Events --> PostgreSQL
Events --> Processing
Redis <-->|Sync Overhead| PostgreSQL
PostgreSQL <-->|Data Movement| Processing
Processing <-->|Cache Updates| Redis
p #[strong What happens at scale]
ul
li #[strong Network-latency tax:] Every system hop adds milliseconds that compound
li #[strong Synchronization delays:] Keeping systems consistent creates processing queues
li #[strong Memory overhead:] Each system caches the same data in different formats
li #[strong Consistency windows:] Brief periods where systems show different data states
hr
h3 The Hidden Cost of Multi-System Success
p #[strong Data Movement Overhead:]
p Your events don't just need processing, they need processing that maintains consistency across all systems.
p Each event triggers:
ul
li #[strong Cache lookup (Redis):] ≈ 0.5 ms network + processing
li #[strong Transaction validation (PostgreSQL):] ≈ 2 ms network + disk I/O
li #[strong Business-logic execution (Custom):] ≈ 1ms processing + data marshalling
li #[strong Result synchronization (across systems):] ≈ 3 ms coordination overhead
p #[strong Minimum per-event cost ≈ 7 ms before business logic.]
p At 10,000 events/s, youd need 70 seconds of processing capacity just #[strong for data movement] per real-time second!
hr
h3 The Performance Gap That Grows With Success
h3 Why Traditional Options Fail
p #[strong Option 1: Scale out each system]
ul
li #[strong Strategy]: Add cache clusters, database replicas, processing nodes
li #[strong Result]: More systems to coordinate, exponentially more complexity
li #[strong Reality]: Network overhead grows faster than processing capacity
p #[strong Option 2: Custom optimization]
ul
li #[strong Strategy]: Build application-layer caching, custom consistency protocols
li #[strong Result]: Engineering team maintains complex, system-specific optimizations
li #[strong Reality]: Solutions don't generalize; each optimization creates technical debt
p #[strong Option 3: Accept compromises]
ul
li #[strong Strategy]: Use async processing, eventual consistency, and accept delayed insights
li #[strong Result]: Business requirements compromised to fit architectural limitations
li #[strong Reality]: Competitive disadvantage as customer expectations grow
hr
h3 The Critical Performance Gap
table(style="borderlicollapse: collapse; margin: 20px 0; width: 100%;")
thead
tr
th(style="border: 1px solid #ddd; padding: 12px; background-color: #f5f5f5; text-align: left;") Component
th(style="border: 1px solid #ddd; padding: 12px; background-color: #f5f5f5; text-align: left;") Optimized for
th(style="border: 1px solid #ddd; padding: 12px; background-color: #f5f5f5; text-align: left;") Typical Latency
tbody
tr
td(style="border: 1px solid #ddd; padding: 12px;") Database
td(style="border: 1px solid #ddd; padding: 12px;") ACID transactions
td(style="border: 1px solid #ddd; padding: 12px;") Milliseconds
tr
td(style="border: 1px solid #ddd; padding: 12px;") Cache
td(style="border: 1px solid #ddd; padding: 12px;") Access speed
td(style="border: 1px solid #ddd; padding: 12px;") Microseconds
tr
td(style="border: 1px solid #ddd; padding: 12px;") Compute
td(style="border: 1px solid #ddd; padding: 12px;") Throughput
td(style="border: 1px solid #ddd; padding: 12px;") Minutes hours
p Applications needing #[strong microsecond insights] on #[strong millisecond transactions] have no good options at scale in traditional architectures.
p During traffic spikes, traditional architectures either drop connections (data loss) or degrade performance (missed SLAs). High-velocity applications need intelligent flow control that guarantees stability under pressure while preserving data integrity.
hr
h3 Event Processing at Scale
p #[strong Here's what traditional multi-system event processing costs:]
pre
code.
// Traditional multi-system event processing
long startTime = System.nanoTime();
// 1. Cache lookup for session data
String sessionData = redisClient.get("session:" + eventId); // ~500μs network
if (sessionData == null) {
sessionData = postgresDB.query("SELECT * FROM sessions WHERE id = ?", eventId); // ~2ms fallback
redisClient.setex("session:" + eventId, 300, sessionData); // ~300μs cache update
}
// 2. Transaction processing
postgresDB.executeTransaction(tx -> { // ~2-5ms transaction
tx.execute("INSERT INTO events VALUES (?, ?, ?)", eventId, userId, eventData);
tx.execute("UPDATE user_stats SET event_count = event_count + 1 WHERE user_id = ?", userId);
});
// 3. Custom processing with consistency coordination
ProcessingResult result = customProcessor.process(eventData, sessionData); // ~1ms processing
redisClient.setex("result:" + eventId, 600, result); // ~300μs result caching
// 4. Synchronization across systems
ensureConsistency(eventId, sessionData, result); // ~2-3ms coordination
long totalTime = System.nanoTime() - startTime;
// Total: 6-12ms per event (not including queuing delays)
p #[strong Compound Effect at Scale:]
table(style="border-collapse: collapse; margin: 20px 0; width: 100%;")
thead
tr
th(style="border: 1px solid #ddd; padding: 12px; background-color: #f5f5f5; text-align: left;") Rate
th(style="border: 1px solid #ddd; padding: 12px; background-color: #f5f5f5; text-align: left;") Required processing time / s
tbody
tr
td(style="border: 1px solid #ddd; padding: 12px;") 1,000 events / s
td(style="border: 1px solid #ddd; padding: 12px;") 612 s
tr
td(style="border: 1px solid #ddd; padding: 12px;") 5,000 events / s
td(style="border: 1px solid #ddd; padding: 12px;") 3060 s
tr
td(style="border: 1px solid #ddd; padding: 12px;") 10,000 events / s
td(style="border: 1px solid #ddd; padding: 12px;") 60120 s
p #[strong The math doesn’t work:] parallelism helps, but coordination overhead grows exponentially with system count.
hr
h3 Real-World Breaking Points
ul
li #[strong Financial services]: Trading platforms hitting 10,000+ trades/second discover that compliance reporting delays impact trading decisions.
li #[strong Gaming platforms]: Multiplayer backends processing user actions find that leaderboard updates lag behind gameplay events.
li #[strong IoT analytics]: Manufacturing systems processing sensor data realize that anomaly detection arrives too late for preventive action.
hr
h3 The Apache Ignite Alternative
h3 Eliminating Multi-System Overhead
pre.mermaid.
flowchart TB
subgraph "Event Processing"
Events[High-Volume Events<br/>10,000/sec]
end
subgraph "Apache Ignite Platform"
subgraph "Collocated Processing"
Memory[Memory-First Storage<br/>Optimized Access Times]
Transactions[MVCC Transactions<br/>ACID Guarantees]
Compute[Event Processing<br/>Where Data Lives]
end
end
Events --> Memory
Memory --> Transactions
Transactions --> Compute
Memory <-->|Minimal Copying| Transactions
Transactions <-->|Collocated| Compute
Compute <-->|Direct Access| Memory
p #[strong Key difference:] events process #[strong where the data lives], eliminating inter-system latency.
hr
h3 Apache Ignite Performance Reality Check
p #[strong Here's the same event processing with integrated architecture:]
pre
code.
// Apache Ignite integrated event processing
try (IgniteClient client = IgniteClient.builder().addresses("cluster:10800").build()) {
// Single integrated transaction spanning cache, database, and compute
client.transactions().runInTransaction(tx -> {
// 1. Access session data (in memory, no network overhead)
Session session = client.tables().table("sessions")
.keyValueView().get(tx, Tuple.create().set("id", eventId));
// 2. Process event with ACID guarantees (same memory space)
client.sql().execute(tx, "INSERT INTO events VALUES (?, ?, ?)",
eventId, userId, eventData);
// 3. Execute processing collocated with data
ProcessingResult result = client.compute().execute(
JobTarget.colocated("events", Tuple.create().set("id", eventId)),
EventProcessor.class, eventData);
// 4. Update derived data (same transaction, guaranteed consistency)
client.sql().execute(tx, "UPDATE user_stats SET event_count = event_count + 1 WHERE user_id = ?", userId);
return result;
});
}
// Result: microsecond-range event processing through integrated architecture
p Processing 10,000 events/s is achievable with integrated architecture eliminating network overhead.
hr
h3 The Unified Data-Access Advantage
p #[strong Here's what eliminates the need for separate systems:]
pre
code.
// The SAME data, THREE access paradigms, ONE system
Table customerTable = client.tables().table("customers");
// 1. Key-value access for cache-like performance
Customer customer = customerTable.keyValueView()
.get(tx, Tuple.create().set("customer_id", customerId));
// 2. SQL access for complex analytics
ResultSet&lt;SqlRow&gt analytics = client.sql().execute(tx,
"SELECT segment, AVG(order_value) FROM customers WHERE region = ?", region);
// 3. Record access for type-safe operations
CustomerRecord record = customerTable.recordView()
.get(tx, new CustomerRecord(customerId));
// All three: same schema, same data, same transaction model
p #[strong Eliminates:]
ul
li #[strong Cache API] for cache operations
li Data movement during #[strong distributed joins] for analytical queries
li #[strong Custom mapping logic] for type-safe access
li #[strong Data synchronization] between cache and database
li #[strong Schema drift risks] across different systems
p #[strong Unified advantage:] One schema, one transaction model, multiple access paths.
hr
h3 Apache Ignite Architecture Preview
p The ability to handle high-velocity events without multi-system overhead requires specific technical innovations:
ul
li #[strong Memory-first storage]: Event data lives in memory with optimized access times typically under 10 microseconds for cache-resident data
li #[strong Collocated compute]: Processing happens where data already exists, eliminating movement
li #[strong Integrated transactions]: ACID guarantees span cache, database, and compute operations
li #[strong Minimal data copying]: Events process against live data through collocated processing and direct memory access
p These innovations address the compound effects that make multi-system architectures unsuitable for high-velocity applications.
hr
h3 Business Impact of Architectural Evolution
h3 Cost Efficiency
ul
li #[strong Reduced infrastructure]: one platform instead of several
li #[strong Lower network costs]: eliminate inter-system bandwidth overhead
li #[strong Simplified operations]: fewer platforms to monitor, backup, and scale
h3 Performance Gains
ul
li #[strong Microsecond latency]: eliminates network overhead
li #[strong Higher throughput]: more events on existing hardware
li #[strong Predictable scaling]: consistent performance under load
h3 Developer Experience
ul
li #[strong Single API]: one model for all data operations
li #[strong Consistent behavior]: no synchronization anomalies
li #[strong Faster delivery]: one integrated system to test and debug
hr
h3 The Architectural Evolution Decision
p Every successful application reaches this point: the architecture that once fueled growth now constrains it.
p #[strong The question isn't whether you'll hit multi-system scaling limits. It's how you'll evolve past them.]
p #[strong Apache Ignite] consolidates transactions, caching, and compute into a single, memory-first platform designed for high-velocity workloads. Instead of managing the compound complexity of coordinating multiple systems at scale, you consolidate core operations into a platform designed for high-velocity applications.
p Your winning architecture doesn't have to become your scaling limit. It can evolve into the foundation for your next phase of growth.
hr
br
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p #[em Return next Tuesday for Part 2, where we examine how Apache Ignite’s memory-first architecture enables optimized event processing while maintaining durability, forming the basis for true high-velocity performance.]