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那位大虾可以解释一下 LUN masking和LUN mapping
从一份Whitepaper上节选出来的关于Lun Masking 的解释:
Abstract: SAN’s provide the infrastructure on which sophisticated storage solutions are built. One benefit is the ability to share a single large storage device across many servers or applications. To enable this the storage is typically carved into smaller pieces which are each assigned a SCSI logical unit number or LUN. Each LUN is then assigned to one or more servers as required by the configuration.
LUN masking is the ability to exclusively assign each LUN to one or more host connections. LUN Masking is used to assign appropriately sized pieces of storage from a common storage pool to various servers. It allows for large devices to be divided into more manageable pieces, it allows reasonably sized file systems to be built across many devices to improve performance
and reliability, and it is often times part of the fail-over process
when a component in the storage path fails. |
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