public void TestRestoreLargeLog()
{
using (TempFile savelog = new TempFile())
using (TempFile temp = new TempFile())
{
var options = GetOptions(temp);
options.FileBlockSize = 512;
options.StoragePerformance = StoragePerformance.Fastest;
options.CalcBTreeOrder(Marshal.SizeOf(typeof(Guid)), Marshal.SizeOf(typeof(TestInfo)));
options.TransactionLog = new TransactionLog <Guid, TestInfo>(
new TransactionLogOptions <Guid, TestInfo>(
options.TransactionLogFileName,
options.KeySerializer,
options.ValueSerializer
)
);
//Now recover...
Dictionary <Guid, TestInfo> first = new Dictionary <Guid, TestInfo>();
Dictionary <Guid, TestInfo> sample;
using (var tree = new BPlusTree <Guid, TestInfo>(options))
{
tree.EnableCount();
Insert(tree, first, 1, 100, TimeSpan.FromMinutes(1));
tree.Commit();
Assert.AreEqual(100, tree.Count);
sample = new Dictionary <Guid, TestInfo>(first);
Insert(tree, sample, 7, 5000, TimeSpan.FromMinutes(1));
Assert.AreEqual(35100, tree.Count);
for (int i = 0; i < 1; i++)
{
foreach (var rec in tree)
{
var value = rec.Value;
value.UpdateCount++;
value.ReadCount++;
tree[rec.Key] = value;
}
}
File.Copy(options.TransactionLog.FileName, savelog.TempPath, true);
tree.Rollback();
TestInfo.AssertEquals(first, tree);
}
//file still has initial committed data
TestInfo.AssertEquals(first, BPlusTree <Guid, TestInfo> .EnumerateFile(options));
//restore the log and verify all data.
File.Copy(savelog.TempPath, options.TransactionLog.FileName, true);
using (var tree = new BPlusTree <Guid, TestInfo>(options))
{
TestInfo.AssertEquals(sample, tree);
}
//file still has initial committed data
TestInfo.AssertEquals(sample, BPlusTree <Guid, TestInfo> .EnumerateFile(options));
}
}
