private static async Task CheckGetKeysSingleThread(string dbFolder)
{
using var blockStore = new Core.Storage.Blocks.CachePrototype.ProtoSharded(2_560);
await using var db = new TrimDatabase(() => new SkipList32(new NativeAllocator32(4096 * 1024, 25)), blockStore, 5, dbFolder, 0);
await db.LoadAsync(startWithoutMerges : true);
var numberOfThreads = Environment.ProcessorCount;
var seed = 7722;
var generator = new KeyValueGenerator(numberOfThreads, seed);
var key = new byte[10];
var value = new byte[100];
for (var t = 0; t < numberOfThreads; t++)
{
for (var i = 0; i < _keysPerThread; i++)
{
//if (i == 7) Debugger.Break();
generator.GetKeyValue(key, value, (short)t, i);
Console.WriteLine($"Thread Id {t} iteration {i}");
await db.GetAsync(key);
}
}
}
private static async Task CheckGetKeysSingleThread(string dbFolder)
{
var dbOptions = new TrimDatabaseOptions()
{
DatabaseFolder = dbFolder, OpenReadOnly = true
};
await using var db = new TrimDatabase(dbOptions);
await db.LoadAsync();
var numberOfThreads = Environment.ProcessorCount;
var seed = 7722;
var generator = new KeyValueGenerator(numberOfThreads, seed);
var key = new byte[10];
var value = new byte[100];
for (var t = 0; t < numberOfThreads; t++)
{
for (var i = 0; i < _keysPerThread; i++)
{
//if (i == 7) Debugger.Break();
generator.GetKeyValue(key, value, (short)t, i);
Console.WriteLine($"Thread Id {t} iteration {i}");
await db.GetAsync(key);
}
}
}
public async Task TestSkipListOverflow()
{
var loadedWords = CommonData.Words;
var folder = "D:\\Database";
foreach (var f in System.IO.Directory.GetFiles(folder))
{
System.IO.File.Delete(f);
}
using var blocks = new MMapBlockCache();
var dbOptions = new TrimDatabaseOptions()
{
DatabaseFolder = folder
};
var db = new TrimDatabase(dbOptions);
await db.LoadAsync();
foreach (var word in loadedWords)
{
var utf8 = Encoding.UTF8.GetBytes(word);
var value = Encoding.UTF8.GetBytes($"VALUE={word}");
await db.PutAsync(utf8, value);
}
var key = Encoding.UTF8.GetBytes(loadedWords[0]);
var expectedValue = Encoding.UTF8.GetBytes($"VALUE={loadedWords[0]}");
var result = await db.GetAsync(key);
Assert.Equal(expectedValue.ToArray(), result.ToArray());
key = Encoding.UTF8.GetBytes(loadedWords[loadedWords.Length / 2]);
expectedValue = Encoding.UTF8.GetBytes($"VALUE={loadedWords[loadedWords.Length / 2]}");
result = await db.GetAsync(key);
Assert.Equal(expectedValue.ToArray(), result.ToArray());
key = Encoding.UTF8.GetBytes(loadedWords[^ 1]);
private static async Task ReadFromDB(short threadId, KeyValueGenerator generator, int numberOfIterations, TrimDatabase trimDB)
{
await Task.Yield();
var keyMemory = new byte[_keySize];
var valueMemory = new byte[_valueSize];
for (var i = 0; i < numberOfIterations; i++)
{
generator.GetKeyValue(keyMemory.AsSpan(), valueMemory.AsSpan(), threadId, numberOfIterations);
var result = await trimDB.GetAsync(keyMemory);
if (result.IsEmpty)
{
Interlocked.Increment(ref _numberOfMisses);
}
//if ((i + 1) % 10 == 0) Console.WriteLine($"Thread {threadId} has read {i + 1} keys");
//if (threadId == 3 && i > 228) Debugger.Break(); // Console.WriteLine($"ERROR Thread {threadId} has read {i + 1} keys");
}
}