红帽全球峰会5.2. 停止并启动重新平衡
当 OSD 出现故障或您停止时，CRUSH 算法会自动启动重新平衡过程，以在剩余的 OSD 之间重新分发数据。
因此，重新平衡可能需要时间和资源，因此，应考虑在故障排除期间停止重新平衡或维护 OSD。要做到这一点，在停止 OSD 前设置 noout 标记：
ceph osd set noout
# ceph osd set noout
完成故障排除或维护后，取消设置 noout 标志以开始重新平衡：
ceph osd unset noout
# ceph osd unset noout注意
停止的 OSD 中的放置组在故障排除和维护期间变为 degraded。
另请参阅
- Red Hat Ceph Storage 3 架构指南 中的 重新平衡和恢复 部分
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