ClickHouse/docs/zh/operations/system-tables/storage_policies.md

machine_translated	machine_translated_rev
true	5decc73b5d

系统。storage_policies

包含有关存储策略和卷中定义的信息 服务器配置.

列:

• policy_name (字符串) — Name of the storage policy.
• volume_name (字符串) — Volume name defined in the storage policy.
• volume_priority (UInt64) — Volume order number in the configuration.
• disks (数组（字符串)) — Disk names, defined in the storage policy.
• max_data_part_size (UInt64) — Maximum size of a data part that can be stored on volume disks (0 — no limit).
• move_factor (Float64) — Ratio of free disk space. When the ratio exceeds the value of configuration parameter, ClickHouse start to move data to the next volume in order.

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。