Remote Differential Compression And Your Vista Network Part 2
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This week I had the opportunity to install Vista SP1 on my computer so I decided to revisit my Remote Differential Compression test. You can Read Part 1 Here. Microsoft has said SP1 will speed up file transfers so I retested with the same file and as you can see it made a marked improvement
4.35 Gig test file, Windows Vista with Remote Differential Compression on.
| Original Vista Version | Vista SP1 |
| Hard drive to Hard drive: 3:12 sec | Hard drive to Hard drive: 1:47 sec |
| Computer to Computer: 13:54 sec | Computer to Computer: 6:36 sec |
4.35 Gig test file, Windows Vista with Remote Differential Compression off
| Original Vista Version | Vista SP1 |
| Hard drive to Hard drive: 2:47sec | Hard drive to Hard drive: 1:53 sec |
| Computer to Computer: 13:03 sec | Computer to Computer: 6:48 sec |
4.35 Gig test file, Windows XP
| Hard drive to Hard drive: 1:33 | |
| Computer to Computer: 8:15 |
With Vista SP1 installed. Remote Differential Compression only had a few second difference between having it turned off. But notice the huge difference between Original Vista and SP1. Wow!! It even beat XP in the computer to Computer test by almost 1.5 minutes.
Update 5-24-08
New information is available to speed up your network read my new post .
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7 Comments on this post
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Matt MS said:
As I understand it the differential compression is most useful with syncing whole folders and when internal sections of files are updated. The diff-comp can sync bits and pieces as opposed to the whole file.
It would be interesting to re-do your test and just change a couple bytes in the GIG file…
January 23rd, 2008 at 11:26 pm -
Kevin said:
@ Matt MS, That a good idea. I was planning on waiting for the final version of SP1 then redoing the test. Thanks for the input.
January 24th, 2008 at 6:15 am -
Tarrant said:
I backed up my HTPC running MCE 2005 dvr-ms files across my Gigabit LAN to a WinXP Pro SP2 computer. Both computers used a Gigabit NIC with standard frames across a Gigabit switch. I got a transfer rate of 30 MBytes/sec (= 240 Mbits/sec).
I then did a clean install of Vista Ultimate on my HTPC, installed SP1, turned off IPv6 and kept RDC on. Restored my dvr-ms back to the HTPC, and now the transfer rate was only 11 MBytes/sec (88 Mbits/sec). Turned RDC off and essentially still got 11 MBytes/sec. Tried copying a file instead from the HTPC to my XP comp, still got the same transfer rate.
Why I am still getting crappy XP Vista transfer rates across a Gigabit LAN?
May 4th, 2008 at 10:43 pm -
Kevin said:
@ Tarrant,
Sorry I took so long to get back to you I was working out of town this week. I feel your pain with the slow network transfers. I’m just on a regular 100mb switch so you can imagine how slow my network is. Have you tried disabling auto tuning yet, I did get a modest speed increase when i disabled it. Follow this link and let me know if it helps. http://www.vistarevisited.com/2007/11/26/disable-vistas-autotuning-to-improve-wireless-connectivity/Kevin.
May 9th, 2008 at 10:06 pm -
Tom Amitai said:
The link above, http://http//www.vistarevisited.com/2008/05/24/how-to-improve-network-performance-in-windows-vista/ , appears to be dead.
July 19th, 2008 at 4:25 pm
I was stuck to 9 MB/s while copying files from my Server...
[...] Remote Differential Compression And Your Vista Network Part 2 [...]
[...] a reader named Tarrant1701 posted a comment in my follow-up post about RDC asking about his slow networking speeds on his gigabit network and we got into a Email discussion [...]