public unsafe void MultiReadSpanByteKeyTest()
{
TestUtils.DeleteDirectory(TestUtils.MethodTestDir, wait: true);
try
{
using var log = Devices.CreateLogDevice(TestUtils.MethodTestDir + "/MultiReadSpanByteKeyTest.log", deleteOnClose: true);
using var fht = new FasterKV <SpanByte, long>(
size: 1L << 10,
new LogSettings { LogDevice = log, MemorySizeBits = 15, PageSizeBits = 12 });
using var session = fht.For(new MultiReadSpanByteKeyTestFunctions()).NewSession <MultiReadSpanByteKeyTestFunctions>();
for (int i = 0; i < 200; i++)
{
var key = MemoryMarshal.Cast <char, byte>($"{i}".AsSpan());
fixed(byte *_ = key)
session.Upsert(SpanByte.FromFixedSpan(key), i);
}
// Evict all records to disk
fht.Log.FlushAndEvict(true);
for (long key = 0; key < 50; key++)
{
// read each key multiple times
for (int i = 0; i < 10; i++)
{
Assert.AreEqual(key, ReadKey($"{key}"));
}
}
long ReadKey(string keyString)
{
Status status;
var key = MemoryMarshal.Cast <char, byte>(keyString.AsSpan());
fixed(byte *_ = key)
status = session.Read(key: SpanByte.FromFixedSpan(key), out var unused);
// All keys need to be fetched from disk
Assert.IsTrue(status.IsPending);
session.CompletePendingWithOutputs(out var completedOutputs, wait: true);
var count = 0;
var value = 0L;
using (completedOutputs)
{
while (completedOutputs.Next())
{
count++;
Assert.IsTrue(completedOutputs.Current.Status.Found);
value = completedOutputs.Current.Output;
}
}
Assert.AreEqual(1, count);
return(value);
}
}
finally
{
TestUtils.DeleteDirectory(TestUtils.MethodTestDir);
}
}