環境:
Commvault 備份虛擬機
異常狀況:
對新的虛擬機做第一次備份，可能容量比較大，過程中又有其他的備份，造成效能問題，最後就停住多個小時後，手動取消。
但後來要重新備份時，傳輸速度變超級慢，速度大概只剩之前的1/7~8，重開機也一樣。
解決過程:
後來發現之前備份失敗後，虛擬機上有一份snapshot沒被移除，先在esxi上，把那份snapshot刪除後，重新備份，就正常了。
Environment:
Commvault (VM Backup)
Issue:
When performing the first backup of a new virtual machine, the data size was relatively large. During the process, other backup jobs were also running, causing performance issues. Eventually, the job became unresponsive and was manually canceled after several hours.
After that, when attempting to run the backup again, the transfer speed became extremely slow, dropping to about 1/7–1/8 of the original speed. Restarting the system did not resolve the issue.
Resolution:
It was later discovered that after the failed backup, a snapshot remained on the virtual machine and was not removed.
By logging into ESXi and deleting the leftover snapshot, then running the backup again, the performance returned to normal.
