红帽全球峰会第 9 章 设置放置组自动扩展
允许集群根据集群使用量自动扩展 PG，这是扩展 PG 的最简单方法。Red Hat Ceph Storage 使用整个系统的可用存储和 PG 的目标数量，比较每个池中存储的数据数量，并相应地应用 PG。该命令仅更改其当前 PG 数 (pg_num) 大于计算出的或建议的 PG 数的 3 倍的池。
每个 OSD 的目标 PG 数量基于 mon_target_pg_per_osd 可配置的。默认值为 100。
流程
要调整
mon_target_pg_per_osd：语法
ceph config set global mon_target_pg_per_osd number
ceph config set global mon_target_pg_per_osd numberCopy to Clipboard Copied! Toggle word wrap Toggle overflow 例如：
[ceph: root@host01 /]# ceph config set global mon_target_pg_per_osd 150
[ceph: root@host01 /]# ceph config set global mon_target_pg_per_osd 150Copy to Clipboard Copied! Toggle word wrap Toggle overflow
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