public void Open()
{
if (!Directory.Exists(_folder))
{
Directory.CreateDirectory(_folder);
}
_env = LmdbEnv.CreateDb(_folder, 1 * 1024 * 1024);
using (var tx = _env.Write()) {
var dto = Lmdb.GetBuffer(tx, 0);
if (dto == null)
{
SetNewBuffer(tx, 0);
}
else
{
_buffer = new Buffer(dto, _folder);
_buffer.OpenOrCreate();
}
var meta = Lmdb.GetCellarMeta(tx, 0, Lmdb.NewCellarDto());
_maxKeySize = meta.GetCellarMaxKeySize();
_maxValSize = meta.GetCellarMaxValSize();
tx.Commit();
}
}
public long GetCheckpoint(string name, long dv = default(long))
{
using (var env = LmdbEnv.CreateDb(_folder, 1024 * 1024, EnvironmentOpenFlags.ReadOnly)) {
using (var tx = env.Read()) {
return(Lmdb.GetStreamPosition(tx, name, dv));
}
}
}
public override void Run()
{
if (!Directory.Exists(DatabasePath))
{
Console.WriteLine("Path not found {0}", DatabasePath);
Environment.Exit(1);
}
var outPath = DatabasePath.TrimEnd('/') + ".pack";
if (Directory.Exists(outPath))
{
Directory.Delete(outPath, true);
}
Directory.CreateDirectory(outPath);
using (var db = LmdbEnv.CreateDb(DatabasePath, 0, EnvironmentOpenFlags.ReadOnly)) {
using (var tx = db.Read()) {
var stats = tx.GetUsedSize();
Console.WriteLine("Entry count: {0}. Size: {1}", stats.EntryCount,
Print.Bytes(stats.UsedBytes));
}
db.CopyTo(outPath, true);
}
var inFile = Path.Combine(outPath, "data.mdb");
Console.WriteLine("Packed into {0}", Print.Bytes(new FileInfo(inFile).Length));
var outFile = Path.Combine(outPath, "data.mdb.gzip");
using (var input = File.OpenRead(inFile))
using (var output = File.Create(outFile))
using (var gz = new GZipStream(output, CompressionLevel.Optimal)) {
input.CopyTo(gz);
}
Console.WriteLine("Gzipped into {0}", Print.Bytes(new FileInfo(outFile).Length));
}
void LoadData()
{
if (!Directory.Exists(_folder))
{
return;
}
using (var env = LmdbEnv.CreateDb(_folder, 1024 * 1024, EnvironmentOpenFlags.ReadOnly)) {
using (var tx = env.Read()) {
_chunks = Lmdb.ListChunks(tx).Select(c => c.Value).ToArray();
_buffer = Lmdb.GetBuffer(tx, 0);
_cellar = Lmdb.GetCellarMeta(tx, 0, new Lmdb.CellarDto());
ByteSize = Cellar.EstimateSize(tx).ByteSize;
}
}
_maxKeySize = _cellar.GetCellarMaxKeySize();
_maxValueSize = _cellar.GetCellarMaxValSize();
}