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Arpit Bhayani Blogs

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Arpit Bhayani Blogs
001 Ai Topological Sort

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TLDR: Multi-Master Replication - Why Conflicts Happen

Date: 2021-11-28 Source: https://arpitbhayani.me/blogs/conflict-detection

Overview

Understand conflicts in multi-master databases - Learn how to detect and resolve data inconsistencies for reliable systems. Every multi-master replication setup comes with a side-effect - Conflicts.

Key Points

  • Every multi-master replication setup comes with a side-effect - Conflicts.
  • Conflict happens when two or more database accepts conflicting updates on the same record.
  • We say that the updates are conflicting when we are unable to resolve them to one value deterministically.
  • In this essay, we talk about conflicts and understand what they are, how to detect them.
  • Say we are building an online book store allowing users to purchase books at the click of a button.
  • Like any e-commerce application, even ours has a Shopping Cart, which acts as a staging area for everything the user shops for.
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002 Temporal Primer
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003 Rag Production
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004 Structure Of Llm Chat
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005 How Llms Work
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006 Monolith Is Distributed System
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007 Defensive Databases
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008 Bm25
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009 Join Algorithms
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010 Venting At Work
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011 Half Life
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012 Multi Paxos
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013 Mysql Replication Internals
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014 Bloom Filters
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017 Product Quantization
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021 Blocking Queues
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022 Heartbeats In Distributed Systems
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039 Masters
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105 Data Partitioning
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108 Conflict Detection
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109 Multi Master Replication
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113 Replication Formats
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115 Master Replica Replication
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116 Durability
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117 Isolation
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118 Atomicity
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119 Consistency
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160 Function Overloading
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161 Isolation Forest
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Takeaway

Although this approach solves the problem of detecting conflicts and getting a chance to resolve them, it makes the setup lose its main advantage of allowing multiple masters to accept writes in parallel.