hello friends.
I'm using Neo4j Java API 2.0 for importing large data of nodes(1 million).
But the problem is that performance is very poor.
See the code for inserting:
//insert
int COUNT = 1000 * 1000;
FileUtils.deleteRecursively(new File(DIRECTORY));
GraphDatabaseService gdb = new
GraphDatabaseFactory().newEmbeddedDatabase(DIRECTORY);
long time = System.currentTimeMillis();
Transaction tx = gdb.beginTx();
for (int i = 1; i <= COUNT; i++)
{
nodeIndex = gdb.index().forNodes("persons");
Node node = gdb.createNode();
node.setProperty("name", TestDataGenerator.getRandomName());
node.setProperty("lastname", TestDataGenerator.getRandomLastName());
node.setProperty("address", TestDataGenerator.getRandomAddress());
if (i % 50000 == 0)
{
tx.success();
tx.finish();
tx = gdb.beginTx();
}
}
tx.success();
tx.finish();
time = System.currentTimeMillis() - time;
System.out.println("import of " + COUNT + " nodes took " + time / 1000 + "
seconds.");
gdb.shutdown();
The performance for inserting is: 307s
If I have just nodes without properites, the performance is much higher
around 30s.
Where is the catch?
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