Reindex find different storage size

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1

i got 2 index: index_A with 10 docs indexB with 4 docs

I try to

  1. reindex index_A and index_B to index_C
  2. reindex index_A and index_B to index_D
    with no error message

I found both index_C and index_D got 14 docs, expected
but the storage size of the index_C and index_D is not the same.

Is it normal? Why?

size
size1342×378 21.5 KB

2

There are several factors that can influence storage size so the small differences you are seeing for these tiny data volumes is nothing I would be worried about. Assuming the data ingested is exactly the same, differences in the mappings of the indices will make a difference. It is also important to check if the number of segments differ. For an accurate size comparison always make sure you forcemerge down to a single segment.

3

Thanks for your reply.

I try to

POST /indexName/_forcemerge

no help. The size is also different. But I checked there is no missing data.

4

You need to specify the max number of segments:

POST /indexName/_forcemerge?max_num_segments=1

1 Like
5

Big thx.

No luck. after forecemerge the storage size is also different.

6

The difference you are seeing is IMHO really irrelevant, so I do not understand why you are concerned by it. Not sure whether the order documents are indexed may cause small differences in the size of files and efficiency of compression.

1 Like