Package com.bigdata.mdi

This package provides a metadata index and range partitioned indices managed by that metadata index.

See: Description

Package com.bigdata.mdi Description

This package provides a metadata index and range partitioned indices managed by that metadata index. Each index partition is a fused view of one or more resources. Those resources include a mutable BTree hosted on a Journal and read-only index segments. Reads are against the fused view. Writes are against the mutable BTree.

Periodically the mutable BTree, or the journal on which it resides, will fill up and a merge task will generate a read-only index segment. When a full merge (aka compacting merge) is applied, the result is a single index segment containing all data for the index partition. Depending on the history policy, some historical data versions and delete markers may be purged from the view meaning that some historical commit states will no longer be readable.

Index partitions are created by a split operation and merged by a join operation. These operations create new index partitions having different separator keys. Split and join operations are not effective until the metadata index has been updated.

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