ceph 参数默认值修改osd_recovery_max_active，速率配置

admin

"osd_max_backfills": "1",
3 C1 [3 l$ \: O/ d+ v5 F"osd_recovery_sleep": "0",

"osd_recovery_max_active": "3",
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0 K  l& q, g3 ^4 `; ]' ~"osd_recovery_max_single_start": "1",
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无论哪种情况，osd上线后通常会发现，自己承载的pg有数据落后了，需要进入恢复模式，从其它osd上获取新的数据达到同步。
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9 t$ D. ]+ y+ B  s% I0 v这个过程就是recovery。recovery分为两种：log-based recovery: 是说osd故障时间不长，需要恢复的数据可以通过pg log回放找回来。
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# ?6 }6 {0 v5 Q* L- Q7 T2 Q( Cbackfill recovery: 是说无法通过pg log回放找全数据，只能通过全量回填(backfill)拷贝。
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操作前记得查看下默认参数值，操作完后记得恢复到原先参数
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ceph tell osd.* injectargs '--osd-max-backfills 1 --osd-recovery-max-active 1 --osd-recovery-max-single-start 1'ceph tell osd.* injectargs '--osd-recovery-sleep 1'
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恢复优先：


ceph tell osd.* injectargs '--osd-max-backfills 5 --osd-recovery-max-active 5 --osd-recovery-max-single-start 5'ceph tell osd.* injectargs '--osd-recovery-sleep 0'
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6 H: V% s) I! S, s: M还原配置：

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ceph tell osd.* injectargs '--osd-max-backfills 1 --osd-recovery-max-active 3 --osd-recovery-max-single-start 1'ceph tell osd.* injectargs '--osd-recovery-sleep 0'

[root@ceph1 ~]# ceph tell 'osd.*' injectargs '--osd-recovery-max-active 4'
8 `, l+ W2 @/ I- mosd.0: osd_recovery_max_active = '4' (not observed, change may require restart)
osd.0: {}
, H1 L/ a) [  c9 |! Dosd.1: osd_recovery_max_active = '4' (not observed, change may require restart)
2 t$ u' d* T+ yosd.1: {}
osd.2: osd_recovery_max_active = '4' (not observed, change may require restart)
0 F; V# f5 p; I' y& K: F0 ]3 g  Rosd.2: {}
: R. ?! K( k1 y[root@ceph1 ~]# ceph tell 'osd.*' injectargs '--osd-max-backfills 16'
osd.0: osd_max_backfills = '16'
3 H3 ~# b% F3 f& c( N6 Losd.0: {}
! M# P. J: E, qosd.1: osd_max_backfills = '16'
osd.1: {}
osd.2: osd_max_backfills = '16'
osd.2: {}



上面都是临时方式修改：

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