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  1. MariaDB Server
  2. MDEV-19388

Improve SSD detection in fil_node_t::get_metadata on Windows

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      Currently, for SSD detection on Windows, innodb uses DeviceIOControl with IOCTL_STORAGE_QUERY_PROPERTY/StorageDeviceSeekPenaltyProperty . On multiple machines, especially in cloud, it would fail (not implemented, or other reason).

      However, SSD can be detected with other means, e.g if TRIM is enabled (s. https://stackoverflow.com/questions/23363115/detecting-ssd-in-windows) . Support for this in DeviceIoControl is better, at least Azure machines correctly return the value.

      We should call DeviceIOControl w.IOCTL_STORAGE_QUERY_PROPERTY with StorageDeviceSeekPenaltyProperty first, then fallback to StorageDeviceTrimProperty, and if both fails, decide it is ultimately not SSD.

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            Assignee:
            wlad Vladislav Vaintroub
            Reporter:
            wlad Vladislav Vaintroub
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