Performance of software-based virtualization (remote slowdowns) Issue Software-based virtualization affects system performance because the software translation is slower than direct hardware access; other events happening on the virtual machine can cause slowdowns. With an intelligent client, much of the burden of software-based virtualization can be shifted to the hardware. This helps make virtualization more efficient and can improve performance to near-native levels, depending on the model. All virtualization technologies impact system performance, but you can gain efficiencies by using a specific virtualization model. With a Type 1 hypervisor, you can improve performance and enhance security because the hypervisor operates directly with the hardware. In addition, you can use Intel TXT to achieve greater security efficiencies at the hypervisor level. Intel TXT provides a hardware-based security foundation that protects against software-based attacks by validating the behavior of critical software components at start-up, protecting against malicious intent. How intelligent clients can help Details Cloud-based data backup Issue Cloud-based data backup can become a performance bottleneck, particularly for organizations that require encryption for any data sent off-site. Encryption and decryption processes can add a significant performance burden when sending large volumes of data to a cloud-based storage provider. Using hardware-based instruction sets that are built into client hardware increases the speed of applications performing encryption and decryption using the Advanced Encryption Standard (AES). AES is widely used across the software ecosystem to protect network traffic, data, and corporate IT infrastructure. Certain Intel client processors—including the Intel Core processor family, both first and second generation—include Intel Advanced Encryption Standard New Instructions (Intel AES-NI).6 AES is a symmetric block cipher that encrypts and decrypts data through several rounds. Intel AESNI offloads several compute-intensive parts of the AES algorithm from software onto client hardware, so that encryption and decryption processes can be accelerated. The performance improvement realized through the use of Intel AES-NI depends on the specific application and how much application time is spent in encryption and decryption. Intel has run tests using the Intel Core i7 processor Extreme Edition that show a two- to tenfold speed increase over software-only execution of AES. 6 For more information on Intel AES-NI, see Intel® Advanced Encryption Standard Instructions (AES-NI). http://software.intel.com/en-us/articles/intel-advanced-encryption-standard-instructions-aes-ni/?wapkw=(aes+ni) For more information on the performance tests described above, see Breakthrough AES Performance with Intel® AES New Instructions. http://software.intel.com/file/27067 How intelligent clients can help Details 10 Intel IT Center Planning Guide | Client Computing in the Cloud
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