Hi, I have a question about tcp connection. In the test environment, openstack uses ceph RBD as backend storage. I created a VM and attache a volume/image to the VM. I monitored how many fd was used by Qemu process. I used the command dd to fill the whole volume/image. I found that the FD count was increased, and stable at a fixed value after some time.
I think when reading/writing to volume/image, tcp connection needs to be established which needs FD, then the FD count may increase. But after reading/writing, why the FD count doesn't descrease? Thanks in advance. BR. Yafeng
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