Optimize MongoDBExportPartitionSupplier for uniform _id type collections#6910
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dinujoh wants to merge 1 commit into
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Optimize MongoDBExportPartitionSupplier for uniform _id type collections#6910dinujoh wants to merge 1 commit into
dinujoh wants to merge 1 commit into
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For collections with uniform _id types, replace the 8-clause $or query
with a simple Filters.gt("_id", value) for finding partition boundaries.
This allows DocumentDB to use a single B-tree index seek instead of
multi-index scan.
Changes:
- Add isUniformIdType() that checks first/last doc _id types
- Add buildNextStartFilter() with simple $gt for uniform types,
falling back to $or-based query for mixed types
- Use fresh Filters.gte() + skip() per iteration for partition end
- Extract addPartition() helper to reduce duplication
- Make BsonHelper.isClassNumber() public for numeric type grouping
Performance: 14M docs (10GB) partitioned in ~30 seconds.
Signed-off-by: Dinu John <86094133+dinujoh@users.noreply.github.com>
dinujoh
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srikanthjg and
srikanthpadakanti
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Description
For collections with uniform _id types, replace the $or query with a simple
Filters.gt("_id", value)for finding partition boundaries. This allows DocumentDB to use a single B-tree index seek instead of multi-index scan.Changes:
Performance: 14M docs (10GB) partitioned in ~30 seconds.
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