Persists Lucene.Net index files in remote (master) directories and uses a local cache to improve performance.
Provides a Lucene.Net.Store.Directory implementation that automatically manages index files across both a
remote directory as well as a local (cache) directory. The Lucene.Net.Store.CachedRemoteDirectory automatically
updates index files on write in the remote directory, and keeps the local cache up-to-date for optimal performance.
Used in combination with remote directories such as Lucene.Net.Store.AzureBlob
it can be used to provide very performant and centrally persisted yet distributed search indices.
The following example shows a basic way to use the CachedRemoteDirectory with an AzureBlobDirectory to keep the
master data files of the index in Azure Blobs with a local copy for faster searching. Files are only written to Azure
Blobs when the directory's Sync method is called (which happens effectively in response to a Commit() on an
IndexWriter), such that only committed data is written to blob storage.
CloudBlobContainer blobContainer = ...;
CachedRemoteOptions options = new CachedRemoteOptions()
{
WriteBehavior = WriteBehavior.WriteCacheSyncRemote, // Write to the cache and sync to the remote to commit.
LockBehavior = LockBehavior.LockRemote, // Use the remote directory's lock factory.
};
string tempPath = Path.Combine(Path.GetTempPath(), "LuceneCache", "MyTestApp");
Directory dir = new CachedRemoteDirectory(options,
new AzureBlobDirectory(blobContainer, "MyTestApp"),
FSDirectory.Open(tempPath));