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当在 Red Hat Enterprise Linux 中通过 iSCSI 使用 device-mapper-multipath 时,如何提高故障路径的故障切换时间?

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当通过 iSCSI 访问 SAN 存储时,在将 I/O 错误传回给应用程序层之前,通常需要多次重试失败的连接。但是,在使用 device-mapper-multipath 的系统上,通常最好让 SCSI 层快速使错误的路径失败,并将错误传回给 device-mapper。这样,I/O 可以路由到备用路径,而不是排队很长时间。因此,建...

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