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public RemoveFromIndex ( byte key, byte[]>.IDictionary |
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| key | byte | |
| indexedValues | byte[]>.IDictionary | |
| return | void | |
public void RemoveUpdatedValuesFromIndex2()
{
string path = Path.GetFullPath("TestData\\RemoveUpdatedValuesFromIndex2");
var timer = new Stopwatch();
using (var db = new KeyValueStore(path)) {
db.Truncate();
int totalSize = 0;
db.Manifest.Logger = msg => Console.WriteLine(msg);
var indexed = new SortedDictionary<string, byte[]>();
int num_items = 1000;
timer.Start();
for (int i = 0; i < num_items; i++) {
indexed["Mod"] = BitConverter.GetBytes(i % 100);
db.Set(BitConverter.GetBytes(i), BitConverter.GetBytes(i), indexed);
totalSize += 8 + 4;
}
timer.Stop();
Console.WriteLine("Wrote data (with indexing) at a throughput of {0} MB/s", (double)totalSize / timer.Elapsed.TotalSeconds / (1024.0 * 1024.0));
timer.Reset();
timer.Start();
var ctModZeros = db.Find("Mod", BitConverter.GetBytes((int)0)).Count();
timer.Stop();
Assert.AreEqual(10, ctModZeros);
Console.WriteLine("Scanned index at a throughput of {0} items/s", (double)ctModZeros / timer.Elapsed.TotalSeconds);
}
// Open the index directly and see if the data is there
using (var db = new KeyValueStore(Path.Combine(path, "Mod"))) {
int num_vals = db.EnumerateFromKey(BitConverter.GetBytes((int)0)).Count(pair => pair.Key.Take(4).All(b => b == 0));
Assert.AreEqual(10, num_vals);
}
// Re-open the main key-value store and update the value at 30
using (var db = new KeyValueStore(path)) {
var indexed = new SortedDictionary<string, byte[]>();
indexed["Mod"] = BitConverter.GetBytes(201 % 100);
db.Set(BitConverter.GetBytes(200), BitConverter.GetBytes(200), indexed);
// Clean the data from the index
db.RemoveFromIndex(BitConverter.GetBytes(200), new Dictionary<string, byte[]> { { "Mod", BitConverter.GetBytes(200 % 100) } });
}
// Open the index again directly and confirm that the lookup key is gone now as well
using (var db = new KeyValueStore(Path.Combine(path, "Mod"))) {
int num_vals = db.EnumerateFromKey(BitConverter.GetBytes((int)0)).Count(pair => pair.Key.Take(4).All(b => b == 0));
Assert.AreEqual(9, num_vals);
}
}
public void LookupOldDataFromIndex()
{
string path = Path.GetFullPath("TestData\\LookupOldDataFromIndex");
using (var db = new KeyValueStore(path)) {
db.Truncate();
db.Manifest.Logger = msg => Console.WriteLine(msg);
db.Set(Encoding.UTF8.GetBytes("KeyA"), Encoding.UTF8.GetBytes("ValueA:1"), new Dictionary<string, byte[]> { { "Idx", Encoding.UTF8.GetBytes("1") } });
db.Set(Encoding.UTF8.GetBytes("KeyB"), Encoding.UTF8.GetBytes("ValueB:2"), new Dictionary<string, byte[]> { { "Idx", Encoding.UTF8.GetBytes("2") } });
db.Set(Encoding.UTF8.GetBytes("KeyC"), Encoding.UTF8.GetBytes("ValueC:3"), new Dictionary<string, byte[]> { { "Idx", Encoding.UTF8.GetBytes("3") } });
var lookupValue = db.Find("Idx", Encoding.UTF8.GetBytes("3")).Single();
Assert.AreEqual("ValueC:3", Encoding.UTF8.GetString(lookupValue.Value));
Assert.AreEqual("KeyC", Encoding.UTF8.GetString(lookupValue.Key));
db.Set(Encoding.UTF8.GetBytes("KeyC"), Encoding.UTF8.GetBytes("ValueC:4"), new Dictionary<string, byte[]> { { "Idx", Encoding.UTF8.GetBytes("4") } });
lookupValue = db.Find("Idx", Encoding.UTF8.GetBytes("4")).Single();
Assert.AreEqual("ValueC:4", Encoding.UTF8.GetString(lookupValue.Value));
Assert.AreEqual("KeyC", Encoding.UTF8.GetString(lookupValue.Key));
Assert.True(db.Find("Idx", Encoding.UTF8.GetBytes("3")).Any());
db.RemoveFromIndex(Encoding.UTF8.GetBytes("KeyC"), new Dictionary<string, byte[]> { { "Idx", Encoding.UTF8.GetBytes("3") } });
Assert.False(db.Find("Idx", Encoding.UTF8.GetBytes("3")).Any());
}
}