bcache

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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 disk drives.

Installation

Kernel

Activate the following kernel options:

KERNEL Enable block device support in the Kernel (CONFIG_BCACHE)

Device Drivers --->
   Multiple devices driver support (RAID and LVM) --->
      <*>   Block device as cache

Emerge

Install sys-fs/bcache-tools:

root #emerge --ask sys-fs/bcache-tools

See also

• Bcachefs — a fully-featured B-tree filesystem based on bcache.

External resources

• Howto bcache - A Gentoo Forums thread on using bcache.
• Arch wiki - The Bcache article on found on the Arch wiki.
• Patrick's Blog - Patrick Lauer (Patrick) , a Gentoo developer, wrote a few short entries on his blog concerning the use of bcache and a multi-disk SATA array back in September, 2014. Read about it here.
• Pommi's blog - SSD caching using Linux and bcache - A 2013 blog entry containing details of setting up bcache.