vinothchandar commented on a change in pull request #2245:
URL: https://github.com/apache/hudi/pull/2245#discussion_r543773277
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File path: docs/_posts/2020-11-11-hudi-indexing-mechanisms.md
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@@ -0,0 +1,80 @@
+---
+title: "Apache Hudi Indexing mechanisms"
+excerpt: "Detailing different indexing mechanisms in Hudi and when to use each
of them"
+author: sivabalan
+category: blog
+---
+
+
+## Introduction
+Hudi employs index to find and update the location of incoming records during
write operations. To be specific, index assist in differentiating
+inserts vs updates. This blog talks about different indices and when to each
of them.
+
+Hudi dataset can be of two types in general, partitioned and non-partitioned.
So, most index has two implementations, one for partitioned dataset
+and another for non-partitioned called as global index.
+
+These are the types of index supported by Hudi as of now.
+
+- InMemory
Review comment:
lets please remove InMemory as an option.. it's just something that is
used by tests atm .
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