I use fio with randwrite io to ceph image , it's run 2000 IOPS in the first time , and run 6000 IOPS in second time

[<m13913886148@xxxxxxxxx>]

        In version 10.2.2, fio firstly run 2000 IOPS, then I break fio, and continue run fio, it run 6000 IOPS.

        But in version 0.94, fio always run 6000 IOPS. With or without repeated fio.

        what is the different between this two versions about this.

        my config is that :

        I have three nodes, and two osds per node. A total of six osds. All osds are ssd disk.

        Here is my ceph.conf of osd:

[osd]

osd mkfs type=xfs

osd data = "">

osd_journal_size = 80000

filestore xattr use omap = true

filestore min sync interval = 10

filestore max sync interval = 15

filestore queue max ops = 25000

filestore queue max bytes = 10485760

filestore queue committing max ops = 5000

filestore queue committing max bytes = 10485760000

journal max write bytes = 1073714824

journal max write entries = 10000

journal queue max ops = 50000

journal queue max bytes = 10485760000

osd max write size = 512

osd client message size cap = 2147483648

osd deep scrub stride = 131072

osd op threads = 8

osd disk threads = 4

osd map cache size = 1024

osd map cache bl size = 128

osd mount options xfs = "rw,noexec,nodev,noatime,nodiratime,nobarrier"

osd recovery op priority = 4

osd recovery max active = 10

osd max backfills = 4

        

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