The principle class is RGWOp. It defines request state, RGWRados store pointer.
A RGW request struct req_state has

• Ceph contect
• op type info
• account, bucket info
• zonegroup name
• RGWBucketInfo bucket_info
• RGWUserInfo *user

Op Execution

RGWGetObj::execute() is the primary execution context under the class RGWGetObj. It uses interfaces of class RGWRados::Object to perfrom I/O ops. The read op carries various information such as zone id, pg version, mod_ptr, object size etc.
Next, the RGWRados::Object::prepare( ) is called.

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