3.3.4. 放置组状态

• 您刚刚创建了一个池，放置组还没有对等。
• 放置组正在恢复。
• 您刚刚向集群添加一个 OSD 或从集群中移除一个 OSD。
• 您刚修改了 CRUSH map，并且已迁移了放置组。
• 在放置组的不同副本中，数据不一致。
• Ceph 清理放置组的副本。
• Ceph 没有足够存储容量来完成回填操作。

• snaptrim ：PG 目前被修剪
• snaptrim_wait ：PG 等待被修剪

• 您达到了几乎全满比率或全满比率。
• 由于 CRUSH 配置中的一个错误，您的数据不会分散到集群中。

• 检索放置组列表：

  [root@mon ~]# ceph pg dump

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• 以 JSON 格式格式化输出并将其保存到文件中：

  [root@mon ~]# ceph pg dump -o FILE_NAME --format=json

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• 查询特定的放置组：

  [root@mon ~]# ceph pg POOL_NUM.PG_ID query

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  JSON 格式的输出示例：

  {
    "state": "active+clean",
    "up": [
      1,
      0
    ],
    "acting": [
      1,
      0
    ],
    "info": {
      "pgid": "1.e",
      "last_update": "4'1",
      "last_complete": "4'1",
      "log_tail": "0'0",
      "last_backfill": "MAX",
      "purged_snaps": "[]",
      "history": {
        "epoch_created": 1,
        "last_epoch_started": 537,
        "last_epoch_clean": 537,
        "last_epoch_split": 534,
        "same_up_since": 536,
        "same_interval_since": 536,
        "same_primary_since": 536,
        "last_scrub": "4'1",
        "last_scrub_stamp": "2013-01-25 10:12:23.828174"
      },
      "stats": {
        "version": "4'1",
        "reported": "536'782",
        "state": "active+clean",
        "last_fresh": "2013-01-25 10:12:23.828271",
        "last_change": "2013-01-25 10:12:23.828271",
        "last_active": "2013-01-25 10:12:23.828271",
        "last_clean": "2013-01-25 10:12:23.828271",
        "last_unstale": "2013-01-25 10:12:23.828271",
        "mapping_epoch": 535,
        "log_start": "0'0",
        "ondisk_log_start": "0'0",
        "created": 1,
        "last_epoch_clean": 1,
        "parent": "0.0",
        "parent_split_bits": 0,
        "last_scrub": "4'1",
        "last_scrub_stamp": "2013-01-25 10:12:23.828174",
        "log_size": 128,
        "ondisk_log_size": 128,
        "stat_sum": {
          "num_bytes": 205,
          "num_objects": 1,
          "num_object_clones": 0,
          "num_object_copies": 0,
          "num_objects_missing_on_primary": 0,
          "num_objects_degraded": 0,
          "num_objects_unfound": 0,
          "num_read": 1,
          "num_read_kb": 0,
          "num_write": 3,
          "num_write_kb": 1
        },
        "stat_cat_sum": {
  
        },
        "up": [
          1,
          0
        ],
        "acting": [
          1,
          0
        ]
      },
      "empty": 0,
      "dne": 0,
      "incomplete": 0
    },
    "recovery_state": [
      {
        "name": "Started\/Primary\/Active",
        "enter_time": "2013-01-23 09:35:37.594691",
        "might_have_unfound": [
  
        ],
        "scrub": {
          "scrub_epoch_start": "536",
          "scrub_active": 0,
          "scrub_block_writes": 0,
          "finalizing_scrub": 0,
          "scrub_waiting_on": 0,
          "scrub_waiting_on_whom": [
  
          ]
        }
      },
      {
        "name": "Started",
        "enter_time": "2013-01-23 09:35:31.581160"
      }
    ]
  }

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其它资源

• 有关快照修剪设置的详情，请参阅 Red Hat Ceph Storage 4 配置指南中的 章节 Object Storage Daemon (OSD)配置选项。