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Windows Server Forum / Virtual Server / December 2004Gigabyte NIC issue?
Can the guest os use gigabyte nic in host os by 1G speed? Justin Yes. It will still show up as 100MBit in the Guest HW, but if you look at the transfer rate, it will be 1G in speed.  Signature//David IIS http://blogs.msdn.com/David.Wang This posting is provided "AS IS" with no warranties, and confers no rights. // Can the guest os use gigabyte nic in host os by 1G speed? Justin Dear David, Thanks for your useful information. Could you offer me the related data that you mentioned? Thanks! Justin > Yes. > [quoted text clipped - 4 lines] > > Justin > Dear David, > > Thanks for your useful information. > > Could you offer me the related data that you mentioned? What related data? SignatureCan I get a w00t w00t? The description that you mentioned such as white paper, web site or forum! >> Dear David, >> [quoted text clipped - 3 lines] > > What related data? >>>Dear David, >>> [quoted text clipped - 6 lines] > The description that you mentioned such as white paper, >web site or forum! I'm not sure what you've been reading, but no it didn't. 1) I didn't post anything. 2) The post told you it will show up as 100Mb, which is true. 3) The post said if you look at the actual transfer rate, you will see 1Gb speed. All true, but there is no website, no forum, no white paper, nothing else is required. SignatureIt's not an optical illusion. It just looks like one. We've done some testing internally and we've found this is not accurate. We have found that transfer rate/rhroughput through the default virtualized network card that comes with VS tops out a slightly below 100MB. This was found over numerous files ranging from 500MB to 10GB. As an example I can copy a 9GB file from a server (on the same subnet and switch) to the physical host in about 4 min, while a copy from the same server to the VM takes about 23 minutes. This is also true in reverse. Transfering between 2 VM's on the same physical host takes about 44 min. Is there a way in which we can 'tweak' anything to actually achieve a higher throughput? Is there another virtual network card we can use? thanks, brad. > Yes. > > It will still show up as 100MBit in the Guest HW, but if you look at the > transfer rate, it will be 1G in speed. > We've done some testing internally and we've found this is not accurate. > We have found that transfer rate/rhroughput through the default [quoted text clipped - 9 lines] > Is there a way in which we can 'tweak' anything to actually achieve a > higher throughput? Is there another virtual network card we can use? I did a test here and I was able to transfer at approximately 125Mb/s on my gigE nic. This is roughly consistent with what the host is able to achieve (and is limited by the remote FTP server) I was definitely able to exceed the limits of a 100Mb NIC though. Signaturedo not creep a coconut -- NANAE We've done some testing internally and we've found this is not accurate. We have found that transfer rate/rhroughput through the default virtualized network card that comes with VS tops out a slightly below 100MB. This was found over numerous files ranging from 500MB to 10GB. As an example I can copy a 9GB file from a server (on the same subnet and switch) to the physical host in about 4 min, while a copy from the same server to the VM takes about 23 minutes. This is also true in reverse. In addition, transfering between 2 VM's on the same physical host takes about 44 min. Is there a way in which we can 'tweak' anything to actually achieve a higher throughput? Is there another virtual network card available we can use? thanks, brad. > Yes. > > It will still show up as 100MBit in the Guest HW, but if you look at the > transfer rate, it will be 1G in speed. |
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