查看 镜像 的 object 数量

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如何查看镜像的object数量？

首先，根据镜像名称获取详细信息

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rbd info vms/ffac4ae6-9f79-4abf-b076-764e2564d774_disk
    rbd image 'ffac4ae6-9f79-4abf-b076-764e2564d774_disk':
    size 500 GB in 64000 objects 
    order 23 (8192 kB objects)
    block_name_prefix: rbd_data.5496211001d833
    format: 2
    features: layering
    flags: 
    parent: images/a8e78422-90a0-475b-bc50-555d45e44e27@snap
    overlap: 10240 MB

然后，根据根据对象前缀查询

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rados -p vms ls|grep rbd_data.5496211001d833|wc -l