[转] 关于 Ceph PG
本系列文章会深入研究 Ceph 以及 Ceph 和 OpenStack 的集成:
(1)安装和部署
SRE实战 互联网时代守护先锋,助力企业售后服务体系运筹帷幄!一键直达领取阿里云限量特价优惠。(3)Ceph 物理和逻辑结构
(4)Ceph 的基础数据结构
(6)QEMU-KVM 和 Ceph RBD 的 缓存机制总结
(8)关于Ceph PGs
Placement Group, PG How PGs are Used? Should OSD#2 fail Data Durability Issue Object Distribution Issue Choosing the number of PGs Example 如何根據現狀調整 PG and PGP? Monitoring OSDs Ceph is NOT Healthy_OK OSD Status Check PG Sets
When A OSD in the Acting Set is down
Up Set Check PG Status Point Peering Peering: Establish Agreement of the PG status Monitoring PG States Check PG Stat List Pool PG IDs The Output Format of the placement group PG Creating PG Create A Pool Peering A Peering Process for a Pool with Replica 3 Active Clean DEGRADED PG with {active + degraded} Recovering Backing Filling (1/2) Backing Filling (2/2) Remapped Stale Identifying Troubled PGs (1/2) Identify Trouble PGs (2/2) Finding An Object Location
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