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

admin

"osd_max_backfills": "1",
"osd_recovery_sleep": "0",

$ m; [. A; f7 n1 }"osd_recovery_max_active": "3",

"osd_recovery_max_single_start": "1",

" Y! W' @2 g; l* }: B* S, g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。


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。


backfill 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。


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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业务优先：

# r9 j, N2 n: A& o# i7 l9 Y
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'


恢复优先：

% N" ^+ o, Z' m: C/ W
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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: k! K3 H# r% Q, J" ~" M% e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'
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+ {: t5 [+ H; [& w3 v4 `[root@ceph1 ~]# ceph tell 'osd.*' injectargs '--osd-recovery-max-active 4'
7 s+ D! y4 q9 q  Fosd.0: osd_recovery_max_active = '4' (not observed, change may require restart)
" f- ?* s$ I' l) W! Uosd.0: {}
osd.1: osd_recovery_max_active = '4' (not observed, change may require restart)
osd.1: {}
7 ?. }  D$ {2 _. r7 O" @& rosd.2: osd_recovery_max_active = '4' (not observed, change may require restart)
osd.2: {}
( S8 \) e( [5 C+ B* c) U' X0 D[root@ceph1 ~]# ceph tell 'osd.*' injectargs '--osd-max-backfills 16'
( A8 d9 ~+ f( V; |osd.0: osd_max_backfills = '16'
osd.0: {}
osd.1: osd_max_backfills = '16'
osd.1: {}
osd.2: osd_max_backfills = '16'
! D: T7 C1 {( l9 w' y) A2 oosd.2: {}
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上面都是临时方式修改：



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