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CONTAP-233390: Azure flashcache performance issues on some Azure instance types

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Issue

  • 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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