void MoveValuesContent(AbstractBufferedWriter writer, uint wastefullFileId)
{
const uint blockSize = 128 * 1024;
var wasteFullStream = _keyValueDB.FileCollection.GetFile(wastefullFileId);
var totalSize = wasteFullStream.GetSize();
var blocks = (int)((totalSize + blockSize - 1) / blockSize);
var wasteInMemory = new byte[blocks][];
var pos = 0UL;
for (var i = 0; i < blocks; i++)
{
_cancellation.ThrowIfCancellationRequested();
wasteInMemory[i] = new byte[blockSize];
var readSize = totalSize - pos;
if (readSize > blockSize)
{
readSize = blockSize;
}
wasteFullStream.RandomRead(wasteInMemory[i], 0, (int)readSize, pos, true);
pos += readSize;
}
_root.Iterate((valueFileId, valueOfs, valueSize) =>
{
if (valueFileId != wastefullFileId)
{
return;
}
var size = (uint)Math.Abs(valueSize);
_newPositionMap.Add(((ulong)wastefullFileId << 32) | valueOfs, (uint)writer.GetCurrentPosition());
pos = valueOfs;
while (size > 0)
{
_cancellation.ThrowIfCancellationRequested();
var blockId = pos / blockSize;
var blockStart = pos % blockSize;
var writeSize = (uint)(blockSize - blockStart);
if (writeSize > size)
{
writeSize = size;
}
writer.WriteBlock(wasteInMemory[blockId], (int)blockStart, (int)writeSize);
size -= writeSize;
pos += writeSize;
}
});
}
void CalculateFileUsefullness(IBTreeRootNode root)
{
root.Iterate((valueFileId, valueOfs, valueSize) =>
{
_cancellation.ThrowIfCancellationRequested();
_fileStats.GetOrFakeValueRef(valueFileId).AddLength((uint)Math.Abs(valueSize));
});
}
void ForbidDeleteOfFilesUsedByStillRunningOldTransaction(IBTreeRootNode root)
{
root.Iterate((valueFileId, valueOfs, valueSize) =>
{
_cancellation.ThrowIfCancellationRequested();
_fileStats.GetOrFakeValueRef(valueFileId).MarkForbidToDelete();
});
}
void CalculateFileUsefullness(IBTreeRootNode root, bool uptodate)
{
root.Iterate((valueFileId, valueOfs, valueSize) =>
{
var id = valueFileId;
var fileStats = _fileStats;
_cancellation.ThrowIfCancellationRequested();
if (id < fileStats.Length)
{
fileStats[id].AddLength((uint)Math.Abs(valueSize), uptodate);
}
});
}
private void ForbidDeleteOfFilesUsedByStillRunningOldTransaction(IBTreeRootNode root)
{
root.Iterate((valueFileId, valueOfs, valueSize) =>
{
var id = valueFileId;
var fileStats = _fileStats;
_cancellation.ThrowIfCancellationRequested();
if (id < fileStats.Length)
{
fileStats[id].MarkForbidToDelete();
}
});
}
