Merging Indexes

Menu option: Index > Index Manager > Merge Indexes

To merge two or more indexes into a single index,

1.   Choose the indexes to merge from the list. 

2.   Choose the index that you want the indexes merged into from the list under Target index.  This list includes all of the indexes selected for merging.

3.   To erase the contents of the target index before the merge, check Clear target.

4.   Click Merge to start merging the indexes.

Merging multiple indexes into a new, empty index is generally faster than merging into an index that already contains data, unless the amount of data being merged is small relative to the size of the target index.

Merged indexes should be built with consistent settings to avoid incompatibility errors during merges. To ensure consistency when building indexes that will be used in a merge, use Create Index (Advanced), check the box to make the index compatible an existing index, and select the index to use for compatibility.

If you use dtSearch to merge new indexes into older existing indexes: Indexes created with dtSearch 7.93 will not be compatible with older indexes for purposes of merging indexes, unless you specify when you create the newer index that it must be compatible with the older index that will be included in or the target of the merge.