I think you could try:
IndexWriter writer = new IndexWriter(fileDirectory, ...)
writer.addIndexes(ramDir)
-Grant
On Mar 20, 2008, at 2:47 PM, roger dimitri wrote:
> Hi,
> I am using the Directory class's copy method to periodically sync
> my RAM based index to a file based index that's supposed to serve as
> a hot backup. I want to know if this is the right way to maintain a
> periodic backup of my RAM based index and, if Yes, then is it
> reliable in a production instance with almost 12 to 15 GB of Lucene
> index loaded into the RAMDirectory.
> Any advice is greatly appreciated.
> I have a sample working code snippet here:
>
> public class RAMtoFILEcopy_test1 {
>
>
> static String[] queries = {
> "a OR b AND c",
> "(a OR b) AND c",
> "a OR (b AND c)",
> "a AND b",
> "a AND b OR c AND d",
> "(a AND b) OR (c AND d)",
> "a AND (b OR c) AND d",
> "((a AND b) OR c) AND d",
> "a AND (b OR (c AND d))",
> "a AND b AND c AND d",
>
> "a OR b AND NOT c",
> "(a OR b) AND NOT c",
> "a OR (b AND NOT c)",
> "a AND NOT d",
> "a AND NOT b OR c AND NOT d",
> "(a AND NOT b) OR (c AND NOT d)",
> "a AND NOT (b OR c) AND NOT d",
> "((a AND NOT b) OR c) AND NOT d",
> "a AND NOT (b OR (c AND NOT d))",
> "a AND NOT b AND NOT c AND NOT d",
>
> "a OR NOT b",
> "a OR NOT a",
>
> "a b",
> "a b c",
> "a b (c d e)",
> "+a +b",
> "a -b",
> "a +b -c",
> "+a b -c",
> "+a -b c",
> "a -b -c",
> "-a b c",
>
> "a OR b c AND d",
> "a OR b c",
> "a AND b c",
> "a OR b c OR d",
> "a OR b c d OR e",
> "a AND b c AND d",
> "a AND b c d AND e"
> };
>
> public static void main(String argv[]) throws Exception {
> Directory dir = new RAMDirectory();
> Analyzer analyzer = new StandardAnalyzer();
>
> IndexWriter writer = new IndexWriter(dir, analyzer, true);
>
> for ( int i=0; i < queries.length; i++ ) {
> Document doc = new Document();
> doc.add(new Field("text", queries[i], Field.Store.YES,
> Field.Index.TOKENIZED));
> writer.addDocument(doc);
> }
> writer.close();
>
>
> Directory dir2 = FSDirectory.getDirectory("/tmp/
> TestHotbackup", true);
> dir.copy(dir, dir2, true);
>
> }
>
> }
>
>
> Thanks a lot,
> Roger
>
>
>
>
>
> ____________________________________________________________________________________
> Never miss a thing. Make Yahoo your home page.
> http://www.yahoo.com/r/hs
--------------------------
Grant Ingersoll
http://www.lucenebootcamp.com
Next Training: April 7, 2008 at ApacheCon Europe in Amsterdam
Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ
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