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docs/en/Community-Articles/2025-10-03-Generating-Sequential-GUIDs/Post.md

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## Sequential GUIDs to the Rescue
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Sequential GUIDs keep the uniqueness but add a predictable ordering component usually by embedding a timestamp in part of the GUID.This means:
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Sequential GUIDs keep the uniqueness but add a predictable ordering component, usually by embedding a timestamp in part of the GUID.This means:
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* Inserts happen at the “end” of the index, not all over the place.
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## ABP Framework’s Secret Sauce
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Here’s where ABP Framework flexes: it **uses sequential GUIDs by default** for entity IDs. No ceremony, no “remember to call this helper method” it’s baked in.
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Here’s where ABP Framework flexes: it **uses sequential GUIDs by default** for entity IDs. No ceremony, no “remember to call this helper method”, it’s baked in.
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Under the hood:
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* **Sequential GUIDs** → fragmentation stays low, inserts fly.
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In high-volume systems, this difference is **not** academic it’s the difference between smooth scaling and spending weekends rebuilding indexes.
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In high-volume systems, this difference is **not** academic, it’s the difference between smooth scaling and spending weekends rebuilding indexes.
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## When to Use Sequential GUIDs
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## When Random GUIDs Still Make Sense
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* Security through obscurity if you don’t want IDs to hint at creation order.
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* Security through obscurity, if you don’t want IDs to hint at creation order.
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* Non-indexed identifiers fragmentation isn’t a concern.
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* Non-indexed identifiers, fragmentation isn’t a concern.
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## The Final Take
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ABP’s default sequential GUID generation is one of those “**small but huge**” features. It’s the kind of thing you don’t notice until you benchmark and then you wonder why you ever lived without it.
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ABP’s default sequential GUID generation is one of those “**small but huge**” features. It’s the kind of thing you don’t notice until you benchmark, and then you wonder why you ever lived without it.
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## Links
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You may want to check the following references to learn more about sequential GUIDs:

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