Flash solutions, particularly PCIe application accelerators, offer tremendous performance capability and the potential to significantly improve workload performance and productivity for business-critical applications. The full performance capability of flash devices may be hindered, however, by software architectures that have not evolved to exploit the unique capabilities and characteristics of flash. This gap between what flash is capable of achieving and what the end user is seeing can be frustrating for Database Administrators (DBAs) and IT infrastructure personnel responsible for application and business performance.
SanDisk’s Non-Volatile Memory File System (NVMF) is the first commercially available file system designed for data center flash and integrated with MySQL to address Fusion ioMemory™ PCIe application accelerators more efficiently and deliver higher levels of performance while reducing the number of writes sent to flash for greater life expectancy. With greater transaction processing capability and less wear on the NAND flash, NVMFS can deliver greater productivity to a MySQL database and offer a greater return on a flash investment.
MySQL databases write database updates twice to ensure data integrity during system failure, but this leads to twice the amount of actual data written per write operation. This double-write inefficiency can increase latency and unnecessarily overburden flash devices with writes, reducing flash’s deployable life. NVMFS utilizes a single, atomic write for greater write efficiency to resolve the double-write problem. By reducing the number of writes from two to one, NVMFS can reduce the amount of data actually written to flash by up to half and may increase flash device longevity. Additionally, the reduction in writes can lead to faster write operations so MySQL users get higher transactions and lower, more consistent latency with NVMFS compared to legacy file systems.
NVMFS also offers enhancements for MySQL compression. MySQL databases have long supported compression, but the implementation has been shown to cause severe reduction in throughput. This performance penalty can offset the benefits of enabling compression, especially with flash devices, in MySQL environments. SanDisk, working closely with the MySQL community, introduced enhancements to the MySQL compression algorithm that nearly eliminate the compression performance penalty. Now, using a new NVM Compression algorithm enabled by NVMFS, MySQL users can gain the benefits of compression – greater capacity utilization and reduced flash wear – without significantly impacting their application performance.
* The performance results discussed herein are based on SanDisk internal testing and use of Fusion ioMemory products and the Non-Volatile Memory File System. Results and performance may vary according to configurations and systems, including drive capacity, system architecture and applications.
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