將大文件寫入磁盤內存不足異常

Question

我正在嘗試寫入然后讀取一個大的隨機文件來計算磁盤速度。 我嘗試了幾種算法，但在嘗試寫入 1GB 文件時不斷出現 out 或 memory 異常。 這是我嘗試過的一些

方法一

   byte[] data = new byte[8192];
        Random rng = new Random();
        using (FileStream stream = File.OpenWrite(filePath))
        {
            for (int i = 0; i < fileSizeMb * 128; i++)
            {
                rng.NextBytes(data);
                stream.Write(data, 0, data.Length);
            }
        }

方法二

const int blockSize = 1024 * 8;
            const int blocksPerMb = (1024 * 1024) / blockSize;

            int count = fileSizeMb * blocksPerMb;

            byte[] data = new byte[blockSize];
            Random rng = new Random();
            //using (FileStream stream = File.OpenWrite(filePath))
            using (StreamWriter sw1 = new StreamWriter(filePath))
            {
                // There 
                for (int i = 0; i < count; i++)
                {
                    rng.NextBytes(data);
                    sw1.BaseStream.Write(data, 0, data.Length);
                    //stream.Write(data, 0, data.Length);

                }
            }

閱讀

   using (StreamReader sr = new StreamReader(filePath))
            {
                String line = sr.ReadToEnd();
            }

Answer 1

方法一

        byte[] data = new byte[8192];
        Random rng = new Random();
        using (FileStream stream = File.OpenWrite(filePath))
        {
            for (int i = 0; i < fileSizeMb * 128; i++)
            {
                rng.NextBytes(data);
                stream.Write(data, 0, data.Length);
                stream.Flush(); // BEETLE JUICE
            }
        }

方法二

        const int blockSize = 1024 * 8;
        const int blocksPerMb = (1024 * 1024) / blockSize;

        int count = fileSizeMb * blocksPerMb;

        byte[] data = new byte[blockSize];
        Random rng = new Random();
        using (StreamWriter sw1 = new StreamWriter(filePath))
        {
            // There 
            for (int i = 0; i < count; i++)
            {
                rng.NextBytes(data);
                sw1.BaseStream.Write(data, 0, data.Length);
                sw1.baseStream.Flush(); // BEETLE JUICE
            }
        }

閱讀

不要將整個文件讀入內存，一次只讀取 4096 個字節。 http://www.csharp-examples.net/filestream-read-file/ 上的示例代碼