I am looking for the reason for slow speed backup / restore with transport hotadd
Virtual media-server; ethernet link 10000 Mb/s
Esx media server and client are the same
Hardware platform for vmware has high performance
Buffer tuning complete
Backup / restore speed ~ 17 MB/s
What is the cause of slow speed?
Just think about it - you have all of the read and write I/O on the same VM, plus the additional overhead on the ESX server.
..... although this incurs more overhead on the physical ESX/ESXi host .....
There is a separate backup segment, it uses SAN transport. Backup speed up to 350 MB / s, restore speed only 60 MB / s. Other segments use NBD transport. Backup / restore speeds are moderate.
I decided to test, and made a stand for checking the speed of hotadd. To store backup images, I configured the storage unit on the local disk. If, as a result, the backup/restore speed rises to 100 MB / s, then i can raise the question of connecting external external storage to the media server.
Back to hottadd transport again.
I am interested in the ability to perform the backup / restore virtual machine procedure at high speed. But the main thing is still the ability to restore a virtual machine at high speed.
An example of a circuit is given in the attachment.
1) do I understand correctly that in the case of a backup, the snapshot will be created on the ESXi Datastore?
2) do I need to configure the NFS client on BackupHost1, and the NFS server on ESXi?
3) is the requirement that Server1 and BackupHost1 be on the same ESXi host ?;
4) how to configure transmission over SAN from BackupHost1 to Media Server1?
I would be grateful for your answers.