| 摘要 |
A storage management system may create a logical storage unit from blocks of storage provided from multiple storage devices. The storage management system may operate using a service level agreement that defines a preferred or minimum performance standard for accesses to the logical storage unit. The service level agreement may include minimum replications, system performance, and system operation characteristics. As read and write operations are performed against the logical storage unit, the configuration of the logical storage unit may be changed to meet the service level agreement. The storage management system may assess and map the capabilities of all available storage devices for a system, then provision a logical storage unit that may initially meet the target service level agreement. When system performance does not meet the service level agreement, read operations may be striped, alternative storage devices may be used, or the location of replicated blocks may be changed. |
