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35 lines
1.4 KiB
Text
35 lines
1.4 KiB
Text
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These are the userspace tools required for bcache.
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Bcache is a patch for the Linux kernel to use SSDs to cache other block
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devices. For more information, see http://bcache.evilpiepirate.org.
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Documentation for the run time interface is included in the kernel tree, in
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Documentation/bcache.txt.
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Included:
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make-bcache
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Formats a block device for use with bcache. A device can be formatted for use
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as a cache or as a backing device (requires yet to be implemented kernel
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support). The most important option is for specifying the bucket size.
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Allocation is done in terms of buckets, and cache hits are counted per bucket;
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thus a smaller bucket size will give better cache utilization, but poorer write
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performance. The bucket size is intended to be equal to the size of your SSD's
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erase blocks, which seems to be 128k-512k for most SSDs; feel free to
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experiment.
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bcache-super-show
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Prints the bcache superblock of a cache device or a backing device.
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Udev rules
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The first half of the rules do auto-assembly and add uuid symlinks
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to cache and backing devices. If util-linux's libblkid is
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sufficiently recent (2.24) the rules will take advantage of
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the fact that bcache has already been detected. Otherwise
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they call a small probe-bcache program that imitates blkid.
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The second half of the rules add symlinks to cached devices,
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which are the devices created by the bcache kernel module.
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Initramfs support
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Currently initramfs-tools, mkinitcpio and dracut are supported.
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