VCenter is attached with 1Gb ethernet
ESXi systems are 10Gb ethernet
iSCSI is on 10Gb ethernet
When I "Browse Datastore" and go to download a large file (.tar) from the iSCSI datastore the transfer is extremely slow (in spite of being fast for normal VM activities). It runs at less than 1% most of the time, peaking occasionally above 70-80% briefly before returning to less than 1%. Here is what the network graph while a transfer is underway looks like:
Any idea why this is occurring?
Hi
That's realy odd, have you tried download file using WinSCp or FastSCP from Veeam ? If not give a try with one of the tools.
What is the transfer between vCenter and other servers ? Maybe it's a problem with duplex mismatch settings between vCenter network card and switch port ?
Hi
That's realy odd, have you tried download file using WinSCp or FastSCP from Veeam ? If not give a try with one of the tools.
What is the transfer between vCenter and other servers ? Maybe it's a problem with duplex mismatch settings between vCenter network card and switch port ?
From my experience, this depends greatly on the patch level you have. not even the version, but the patch level makes a difference.
i can get 35 MB/sec using veeam. everything else i get around 25 MB/sec. i'm on 5.0 newest now.
vmware must throttle this in some manner, because why would veeam be better than other methods?
in any case, with different patch levels i was as low as 15 MB/sec, sometimes slower.
if i remember correctly, 4.1.1 was really slow and 4.1.3 was much better.