The merge
utility lets you combine multiple collections with identical schemas. This is useful for merging smaller collections built from different sources into one, large collection. Also, you can use the merge
utility to break up the collection into smaller collections of a roughly uniform size.
Note The Verity |
It is important to note that collections can be merged only if they have identical schemas. Collections can be merged if they have exactly the same set of style files (and style file entries).
Breaking up a large collection helps to optimize search performance, because it allows many applications to perform multiple concurrent search requests over the different collections. After breaking up a large collection, you can also discard older collections to reclaim limited disk storage space.
merge
can be found in the ColdFusion bin directory: cfusion\bin
.
To obtain help for the merge utility, enter the following command:
merge -help
Note After running the merge utility, you must optimize the collection, using the |
c:\cfusion\bin\merge /common = c:\cfusion\verity\common
The following is the syntax for using the merge utility to merge multiple collections into a single collection:
merge <newCollection> <srcCollection1> <srcCollection2>
[srcCollectionN]
The utility reads srcCollection1
, srcCollection2
and so on and merges them into a single collection with the directory name given for newCollection If the directory name given for newCollection doesn't exist, then it is created.
The following is the syntax for using the merge utility to split a single large collection into smaller collections.
merge -split <srcCollection> <newCollection1> <newCollection2>
[-number]
The utility reads srcCollection
and splits it in roughly equal-sized pieces, using the file names given for newCollection1
and so on.
If you want to split a very large collection into a large number of new collections, you can use the following option instead of explicitly naming each new collection:
merge -split -number newCollection srcCollection
The utility reads the collection identified by srcCollection
and splits it into the number of segments specified by the -number
option. The name of the first new collection is generated by appending the first two letters in the alphabet (aa) to the directory name given for newCollection
. Each subsequent file name is generated by incrementing one of the appended letters (up to zz) for a maximum of 676 partitions. For example, if the value of -number
is 3, and the value of newCollection
is Collection1
, the collections are named, Collection1aa
, Collection1ab
, and Collection1ac
.
Note The maximum length of the directory name given for |