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If there is a problem with the power supply, will the data in C0 be lost ？ （have not been flushed to Cn) |
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Replies: 3 comments
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Yes, data in c0 will be lost. The KVDB parameter dur_intvl_ms controls the max time data is cached before automatically flushing to media. And there are API calls for forcing cached data to media. |
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Is it still true in HSE 2.0? I noticed some WAL code in the source tree. Not sure whether used to keep data if power off. |
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Yes, HSE 2.0 still caches data in c0. When that data is flushed to stable storage (now a WAL) is determined by the durability controls as documented. |
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Yes, data in c0 will be lost. The KVDB parameter dur_intvl_ms controls the max time data is cached before automatically flushing to media. And there are API calls for forcing cached data to media.