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系统。storage_policies

包含有关存储策略和卷中定义的信息 .

• (字符串) — Name of the storage policy.
• () — Volume order number in the configuration.
• (UInt64) — Maximum size of a data part that can be stored on volume disks (0 — no limit).

如果存储策略包含多个卷，则每个卷的信息将存储在表的单独行中。