?? ??? ??(10GB ??)? ??? 10? ??

??? ?? ???? ???? ??? ?? ? ??? ??? ??? ? ?. 10GB? ???? ??? ??? ? ?? ?? ????? ??? ? ????. ? ????? C#? ???? ? ??? ?? ???? ???? ???? ? ??? ???? ?? ??? ?????.

??? 10?? ????? ????? ??? ??? ?? ???? ??? ?????. ? ?? ???? ? ???? 10? ??? ?? ??? ????? ?? ?????. ? ??? ???? ?? ???? ??? ?? ??? 10?? ?????.

?? ??? ?????.

public static string ReadEndTokens(string path, Int64 numberOfTokens, Encoding encoding, string tokenSeparator) {

    int sizeOfChar = encoding.GetByteCount("\n");
    byte[] buffer = encoding.GetBytes(tokenSeparator);

    using (FileStream fs = new FileStream(path, FileMode.Open)) {
        Int64 tokenCount = 0;
        Int64 endPosition = fs.Length / sizeOfChar;

        for (Int64 position = sizeOfChar; position < endPosition; position += sizeOfChar) {
            fs.Seek(-position, SeekOrigin.End);
            fs.Read(buffer, 0, buffer.Length);

            if (encoding.GetString(buffer) == tokenSeparator) {
                tokenCount++;
                if (tokenCount == numberOfTokens) {
                    byte[] returnBuffer = new byte[fs.Length - fs.Position];
                    fs.Read(returnBuffer, 0, returnBuffer.Length);
                    return encoding.GetString(returnBuffer);
                }
            }
        }

        // handle case where number of tokens in file is less than numberOfTokens
        fs.Seek(0, SeekOrigin.Begin);
        buffer = new byte[fs.Length];
        fs.Read(buffer, 0, buffer.Length);
        return encoding.GetString(buffer);
    }
}

? ??? ??? 10?? ?? ?? ??? ???? ?????. ??? ????? ???? ?? ???? ???? ??? ??? ???? tokenSeparator? ???? ?? ?? ??? ??? ?? ??? ??? ? ????.

? ?? ??? ???? ??? 10?? ??? ???? ????? ??? ? ????. ???? ??? ??? ??? ?????.

? ??? C#?? 10GB ??? ??? ??? 10?? ????? ?? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!