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This article mainly shows you the "sample analysis of the process of creating PG in ceph", which is easy to understand and well-organized. I hope it can help you solve your doubts. Let me lead you to study and study the "sample analysis of the process of creating PG in ceph".

The pg of the main osd is created by monitor; call OSD::handle_pg_create (OpRequestRef op)

MOSDPGCreate* m = (MOSDPGCreate*) op- > get_req (); get PGid from message queue, possibly create more than one PG at a time

Require_mon_peer () / require_same_or_newer_map () determines the connection monitor, osdmap version number

For Loop to create PG

Osdmap- > pg_to_up_acting_osds calculate PG to add to the corresponding osd

Osdmap- > get_primary_shard calculates the master copy

If (can_create_pg (pgid)) if you can create a PG, submit * rctx.transaction to create a PG

Maybe_update_heartbeat_peers () updates hearbeat peer

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