pinkpanther56
Technical User
We have a Xenserver hosting several Windows VM’s connected to an iSCSI SAN via 3x 1Gb NICs that are in an LACP bond. During normal load the setup performs fine the two virtual file servers serve files to 400 clients all day long without issue, these files are mainly word, excel and jpeg’s. The DC and print server also on the same Xenserver perform fine as well.
The problem comes when trying to copy large files I tried to export a 10 Gb VHD from Xencenter the other day and it took over an hour, I also see slow times when copying large files to the Windows VM’s the copy starts very fast but then drops off to very slow speeds. The server running Xencenter is a physical HP box that I use for backups and is a quad core with a Gb NIC so I don’t think that’s the problem.
I’ve been told by Citrix that Xenserver doesn’t support jumbo frames which is a shame as the SAN does so that’s not something I can set. The SAN and Xenserver are connected via a HP ProCurve 2910al switch which again should be more than enough to cope with the load.
The Xenservers are on Sun x4150s servers running Xenserver 5.5.
Can anyone suggest where I should start looking to troubleshoot this issue?
If you require more information please ask.
Thanks.
The problem comes when trying to copy large files I tried to export a 10 Gb VHD from Xencenter the other day and it took over an hour, I also see slow times when copying large files to the Windows VM’s the copy starts very fast but then drops off to very slow speeds. The server running Xencenter is a physical HP box that I use for backups and is a quad core with a Gb NIC so I don’t think that’s the problem.
I’ve been told by Citrix that Xenserver doesn’t support jumbo frames which is a shame as the SAN does so that’s not something I can set. The SAN and Xenserver are connected via a HP ProCurve 2910al switch which again should be more than enough to cope with the load.
The Xenservers are on Sun x4150s servers running Xenserver 5.5.
Can anyone suggest where I should start looking to troubleshoot this issue?
If you require more information please ask.
Thanks.