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Bcache Stability- Improvement for Cloud Infrastructure

Bcache Stability- Improvement for Cloud Infrastructure

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Bcache was merged as a block layer cache in Linux v3.10. Although there are bug reports time to time, it has been deployed in various systems of cloud infrastructure in the past five years. Since 2017 we have more active developers (most of them are from China) to contribute many critical stability fixes. These fixes address issues from deadlock, I/O hang, kernel oops. Especially when cache or cached devices are failed or gone, bcache device can be stopped precisely and elegantly (panic on failure is unnecessary anymore). The stability of bcache has huge improvement, and it is ready for more work loads from large scaled could infrastructure for now days.
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