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I have a DynamoDB GSI with a low cardinality (1) partition key and a sort key. I'm not able to find any information about any limits for this partition key. I already read how it's supposed to behave in case of primary key with a low cardinality as described here, but I'm not sure if the same principles apply for global secondary indexes.

My main concern is: Can I fetch the items properly sorted by the sort key no matter how much the index grows? Or I need to resort to write-sharding as described here?

Any help or a pointer to the documentation describing the behavior will be highly appreciated.

vmihaylov76
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  • How much data are we talking, what capacity mode is the table in, and how much write traffic is the base table getting at any given time? – NoSQLKnowHow Aug 09 '21 at 18:10
  • @Kirk, The capacity mode is on-demand, and the expected traffic is in several thousand items per day. – vmihaylov76 Aug 10 '21 at 07:28

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