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SSD Cache

Introduction

SSD cache is a solution that utilizes the high speed and low latency of SSDs to accelerate read and write operations, particularly for frequently accessed hot data, to enhance the performance of HDD storage.

For applications requiring storing massive amounts of data, like file sharing and backup, HDD storage is a cost-effective solution. However, while HDD drives excel in sequential data access, their design results in poor performance for random access, limiting their effectiveness in certain use case scenarios. To overcome this challenge, integrating a small number of SSDs as a cache significantly enhances IOPS for file- and block-level applications.

SSD cache is a solution that utilizes the high speed and low latency of SSDs to accelerate read and write operations

Benefits of SSD Cache

Combining the cost-effectiveness and capacity of HDDs with the benefits of high-speed SSDs enables storage to meet capacity requirements and handle high I/O loads while significantly improving overall performance.

At the file level, SSD cache accelerates operations like searching, listing, and opening files by storing metadata and frequently accessed file information on high-speed SSDs. This reduces the time required for these tasks, boosting read and write performance by up to 6x*. It ensures faster file access and improved responsiveness for applications such as file sharing, Electronic Design Automation (EDA), HPC, Media & Entertainment (M&E), and backup.

At the block level, SSD cache enhances data access in random read-intensive environments by caching frequently accessed data blocks. This reduces latency and increases efficiency, delivering performance improvements of up to 16x*. It is particularly beneficial for applications requiring high-speed random data retrieval, such as online transaction processing (OLTP) and email services like Microsoft Exchange.

Note: Compared to storage without SSD cache and depending on the workload.

Highlight
  • Compared to systems fully equipped with SSDs, it cost-effectively overcomes the limitations of HDDs in random access.
  • Provides comprehensive support for file-level and block-level storage.
  • Beneficial for file applications such as file sharing, EDA, HPC, M&E, and backup, and for block applications such as online transaction processing (OLTP) and email services like Microsoft Exchange.
  • SSD cache is supported on EonStor CS scale-out NAS, EonStor DS enterprise SAN storage, and EonStor GS enterprise unified storage.
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