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new 504e544 update default compression format for bitmap (#11610)
504e544 is described below
commit 504e54402becd88dba5c17a82f80112dc0c09b28
Author: Arvin.Z <[email protected]>
AuthorDate: Wed Aug 18 02:24:27 2021 -0700
update default compression format for bitmap (#11610)
Co-authored-by: azheng <[email protected]>
---
docs/ingestion/ingestion-spec.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/docs/ingestion/ingestion-spec.md b/docs/ingestion/ingestion-spec.md
index d57f4f5..d2b4a5b 100644
--- a/docs/ingestion/ingestion-spec.md
+++ b/docs/ingestion/ingestion-spec.md
@@ -474,7 +474,7 @@ The `indexSpec` object can include the following properties:
|Field|Description|Default|
|-----|-----------|-------|
-|bitmap|Compression format for bitmap indexes. Should be a JSON object with
`type` set to `roaring` or `concise`. For type `roaring`, the boolean property
`compressRunOnSerialization` (defaults to true) controls whether or not
run-length encoding will be used when it is determined to be more
space-efficient.|`{"type": "concise"}`|
+|bitmap|Compression format for bitmap indexes. Should be a JSON object with
`type` set to `roaring` or `concise`. For type `roaring`, the boolean property
`compressRunOnSerialization` (defaults to true) controls whether or not
run-length encoding will be used when it is determined to be more
space-efficient.|`{"type": "roaring"}`|
|dimensionCompression|Compression format for dimension columns. Options are
`lz4`, `lzf`, or `uncompressed`.|`lz4`|
|metricCompression|Compression format for primitive type metric columns.
Options are `lz4`, `lzf`, `uncompressed`, or `none` (which is more efficient
than `uncompressed`, but not supported by older versions of Druid).|`lz4`|
|longEncoding|Encoding format for long-typed columns. Applies regardless of
whether they are dimensions or metrics. Options are `auto` or `longs`. `auto`
encodes the values using offset or lookup table depending on column
cardinality, and store them with variable size. `longs` stores the value as-is
with 8 bytes each.|`longs`|
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