private static async Task BenchMergeSortAsync(IFdbDatabase db, int N, int K, int B, CancellationToken ct)
{
Console.WriteLine($"=== BenchMergeSort(N={N:N0}, K={K:N0}, B={B:N0}) ===");
// create multiple lists
var location = db.GlobalSpace.Partition.ByKey("MergeSort");
await db.ClearRangeAsync(location, ct);
var sources = Enumerable.Range(0, K).Select(i => 'A' + i).ToArray();
var rnd = new Random();
// insert a number of random number lists
Console.Write($"> Inserting {(K * N):N0} items... ");
foreach (var source in sources)
{
using (var tr = db.BeginTransaction(ct))
{
var list = location.Partition.ByKey(source);
for (int i = 0; i < N; i++)
{
tr.Set(list.Keys.Encode(rnd.Next()), Slice.FromInt32(i));
}
await tr.CommitAsync();
}
}
Console.WriteLine("Done");
// merge/sort them to get only one (hopefully sorted) list
using (var tr = db.BeginTransaction(ct))
{
var mergesort = tr
.MergeSort(
sources.Select(source => KeySelectorPair.StartsWith(location.Keys.Encode(source))),
(kvp) => location.Keys.DecodeLast <int>(kvp.Key)
)
.Take(B)
.Select(kvp => location.Keys.Unpack(kvp.Key));
Console.Write($"> MergeSort with limit {B:N0}... ");
var sw = Stopwatch.StartNew();
var results = await mergesort.ToListAsync();
sw.Stop();
Console.WriteLine("Done");
Console.WriteLine($"Took {FormatTimeMilli(sw.Elapsed.TotalMilliseconds)} to merge sort {results.Count:N0} results from {K} lists of {N} items each");
//foreach (var result in results)
//{
// Console.WriteLine(result.Get<int>(-1));
//}
}
Console.WriteLine();
}
private static async Task BenchMergeSortAsync(IFdbDatabase db, int N, int K, int B, CancellationToken ct)
{
// create multiple lists
var location = db.Partition("MergeSort");
await db.ClearRangeAsync(location, ct);
var sources = Enumerable.Range(0, K).Select(i => 'A' + i).ToArray();
var rnd = new Random();
// insert a number of random number lists
Console.Write("> Inserting " + (K * N).ToString("N0", CultureInfo.InvariantCulture) + " items... ");
foreach (var source in sources)
{
using (var tr = db.BeginTransaction(ct))
{
var list = location.Partition(source);
for (int i = 0; i < N; i++)
{
tr.Set(list.Pack(rnd.Next()), Slice.FromInt32(i));
}
await tr.CommitAsync();
}
}
Console.WriteLine("Done");
// merge/sort them to get only one (hopefully sorted) list
using (var tr = db.BeginTransaction(ct))
{
var mergesort = tr
.MergeSort(
sources.Select(source => FdbKeySelectorPair.StartsWith(location.Pack(source))),
(kvp) => location.UnpackLast <int>(kvp.Key)
)
.Take(B)
.Select(kvp => location.Unpack(kvp.Key));
Console.Write("> MergeSort with limit " + B + "... ");
var sw = Stopwatch.StartNew();
var results = await mergesort.ToListAsync();
sw.Stop();
Console.WriteLine("Done");
Console.WriteLine("Took " + FormatTimeMilli(sw.Elapsed.TotalMilliseconds) + " to merge sort " + results.Count + " results from " + K + " lists of " + N + " items each");
//foreach (var result in results)
//{
// Console.WriteLine(result.Get<int>(-1));
//}
}
}
/// <summary>
/// Setup the initial state of the database
/// </summary>
public async Task Init(IFdbDatabase db, CancellationToken ct)
{
// open the folder where we will store everything
this.Subspace = await db.Directory.CreateOrOpenAsync(new [] { "Benchmarks", "LeakTest" }, cancellationToken : ct);
// clear all previous values
await db.ClearRangeAsync(this.Subspace, ct);
// insert all the classes
await db.WriteAsync((tr) =>
{
tr.Set(this.Subspace.Key + FdbKey.MinValue, Slice.FromString("BEGIN"));
tr.Set(this.Subspace.Key + FdbKey.MaxValue, Slice.FromString("END"));
}, ct);
}
/// <summary>
/// Setup the initial state of the database
/// </summary>
public async Task Init(IFdbDatabase db, CancellationToken ct)
{
// open the folder where we will store everything
this.Subspace = await db.Directory.CreateOrOpenAsync(new [] { "Benchmarks", "LeakTest" }, cancellationToken: ct);
// clear all previous values
await db.ClearRangeAsync(this.Subspace, ct);
// insert all the classes
await db.WriteAsync((tr) =>
{
tr.Set(this.Subspace.Concat(FdbKey.MinValue), Slice.FromString("BEGIN"));
tr.Set(this.Subspace.Concat(FdbKey.MaxValue), Slice.FromString("END"));
}, ct);
}
/// <summary>
/// Setup the initial state of the database
/// </summary>
public async Task Init(IFdbDatabase db, CancellationToken ct)
{
// open the folder where we will store everything
this.Subspace = await db.Directory.CreateOrOpenAsync(new [] { "Tutorials", "ClassScheduling" }, ct : ct);
// clear all previous values
await db.ClearRangeAsync(this.Subspace, ct);
// insert all the classes
await db.WriteAsync((tr) =>
{
foreach (var c in this.ClassNames)
{
tr.Set(ClassKey(c), Slice.FromStringAscii("100"));
}
}, ct);
}
/// <summary>
/// Setup the initial state of the database
/// </summary>
public async Task Init(IFdbDatabase db, CancellationToken ct)
{
this.Subspace = await db.ReadWriteAsync(async tr =>
{
// open the folder where we will store everything
var subspace = await db.Root["Benchmarks"]["LeakTest"].CreateOrOpenAsync(tr);
// clear all previous values
await db.ClearRangeAsync(subspace, ct);
// insert all the classes
tr.Set(subspace.GetPrefix() + FdbKey.MinValue, Slice.FromString("BEGIN"));
tr.Set(subspace.GetPrefix() + FdbKey.MaxValue, Slice.FromString("END"));
return(subspace);
}, ct);
}
/// <summary>
/// Setup the initial state of the database
/// </summary>
public async Task Init(IFdbDatabase db, CancellationToken ct)
{
// open the folder where we will store everything
this.Subspace = await db.Directory.CreateOrOpenAsync(new [] { "Tutorials", "ClassScheduling" }, cancellationToken: ct);
// clear all previous values
await db.ClearRangeAsync(this.Subspace, ct);
// insert all the classes
await db.WriteAsync((tr) =>
{
foreach (var c in this.ClassNames)
{
tr.Set(ClassKey(c), Slice.FromAscii("100"));
}
}, ct);
}
public async Task RunClear(IFdbDatabase db, CancellationToken ct)
{
// clear everything
await db.ClearRangeAsync(this.WorkerPool.Subspace, ct);
}
private static async Task BenchMergeSortAsync(IFdbDatabase db, int N, int K, int B, CancellationToken ct)
{
// create multiple lists
var location = db.Partition.ByKey("MergeSort");
await db.ClearRangeAsync(location, ct);
var sources = Enumerable.Range(0, K).Select(i => 'A' + i).ToArray();
var rnd = new Random();
// insert a number of random number lists
Console.Write("> Inserting " + (K * N).ToString("N0", CultureInfo.InvariantCulture) + " items... ");
foreach (var source in sources)
{
using (var tr = db.BeginTransaction(ct))
{
var list = location.Partition.ByKey(source);
for (int i = 0; i < N; i++)
{
tr.Set(list.Keys.Encode(rnd.Next()), Slice.FromInt32(i));
}
await tr.CommitAsync();
}
}
Console.WriteLine("Done");
// merge/sort them to get only one (hopefully sorted) list
using (var tr = db.BeginTransaction(ct))
{
var mergesort = tr
.MergeSort(
sources.Select(source => FdbKeySelectorPair.StartsWith(location.Keys.Encode(source))),
(kvp) => location.Keys.DecodeLast<int>(kvp.Key)
)
.Take(B)
.Select(kvp => location.Keys.Unpack(kvp.Key));
Console.Write("> MergeSort with limit " + B + "... ");
var sw = Stopwatch.StartNew();
var results = await mergesort.ToListAsync();
sw.Stop();
Console.WriteLine("Done");
Console.WriteLine("Took " + FormatTimeMilli(sw.Elapsed.TotalMilliseconds) + " to merge sort " + results.Count + " results from " + K + " lists of " + N + " items each");
//foreach (var result in results)
//{
// Console.WriteLine(result.Get<int>(-1));
//}
}
}
public async Task RunClear(IFdbDatabase db, CancellationToken ct)
{
// clear everything
await db.ClearRangeAsync(this.WorkerPool.Subspace, ct);
}