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30 lines
1.6 KiB
Markdown
30 lines
1.6 KiB
Markdown
---
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machine_translated: true
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machine_translated_rev: 5decc73b5dc60054f19087d3690c4eb99446a6c3
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---
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# 系统。集群 {#system-clusters}
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包含有关配置文件中可用的集群及其中的服务器的信息。
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列:
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- `cluster` (String) — The cluster name.
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- `shard_num` (UInt32) — The shard number in the cluster, starting from 1.
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- `shard_weight` (UInt32) — The relative weight of the shard when writing data.
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- `replica_num` (UInt32) — The replica number in the shard, starting from 1.
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- `host_name` (String) — The host name, as specified in the config.
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- `host_address` (String) — The host IP address obtained from DNS.
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- `port` (UInt16) — The port to use for connecting to the server.
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- `user` (String) — The name of the user for connecting to the server.
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- `errors_count` (UInt32)-此主机无法到达副本的次数。
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- `estimated_recovery_time` (UInt32)-剩下的秒数，直到副本错误计数归零，它被认为是恢复正常。
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请注意 `errors_count` 每个查询集群更新一次，但 `estimated_recovery_time` 按需重新计算。 所以有可能是非零的情况 `errors_count` 和零 `estimated_recovery_time`，下一个查询将为零 `errors_count` 并尝试使用副本，就好像它没有错误。
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**另请参阅**
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- [表引擎分布式](../../engines/table-engines/special/distributed.md)
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- [distributed_replica_error_cap设置](../../operations/settings/settings.md#settings-distributed_replica_error_cap)
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- [distributed_replica_error_half_life设置](../../operations/settings/settings.md#settings-distributed_replica_error_half_life)
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