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CONAP-233390：某些Azure实例类型上的Azure闪存性能问题

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问题描述

CVO Azure may experience performance issues when running with Flash Cache enabled on some Azure hosts that present NVMe devices with a non-zero doorbell stride. The performance issue is indicated by the following EMS event:
raidio_thread: extCache.io.writeError:notice]: WAFL external cache I/O write error: Insertq_save: unable to set up context chain, code

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