Hi all, Recently, I have been studying the influence of object-map on RBD export . My expectation is that object-map can improve the speed of export But, I did not find any effect of object-map in the experiment. Then, I look in the code for the reason. I found that the object-map was ignored when rbd opened the image in read-only mode, and Open image read-only when export. I'm wondering why we can't open an image in read-only mode using object-map feature. In this case, the object-map feature does not seem to improve the performance of rbd export . Your prompt reply will be appreciated. Thanks. Guotao Yao
