Bcache is a Linux kernel block layer cache. It allows one or more fast disk drives such as flash-based solid state drives (SSDs) to act as a cache for one or more slower hard disk drives.
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Bcache is a Linux kernel block layer cache(hence the name, b lock cache). It allows one or more fast disk drives such as flash-based solid state drives (SSDs) to act as a cache for one or more slower hard disk drives.
It is designed around the performance characteristics of SSDs, minimizing write amplification by never performing random writes and by turning them into sequential writes instead – for both the cache and the primary storage. That helps extending the lifetime of flash-based devices used as caches, and also improves performance of write-sensitive primary storages, like RAID 5.
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