Filestore merge and split

[Paul Renner <rennerp78@xxxxxxxxx>]

Hello cephers

we have many (millions,  small objects in our RadosGW system and are getting not very good write performance, 100-200 PUTs /sec.

I have read on the mailinglist that one possible tuning option would be to increase the max. number of files per directory on OSDs with eg.

filestore merge threshold = 40
filestore split multiple = 8

Now my question is, do we need to rebuild the OSDs to make this effective? Or is it a runtime setting?

I'm asking because when setting this with injectargs I get the message "unchangeable" back.

Thanks for any insight.

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