It’s the New Phone

I finally lost my patience with my old mobile provider last week & decided it was time for a change.  While I was changing, I decided that maybe it was time for a Smartphone… Wow.  It definitely isn’t perfect yet, but this is by far the best mobile device that I’ve ever used.  Having instant…

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SMB Perf articles

I’ve been working a lot with file sharing performance, and I’m trying to write a few essays on those experiences.  The first, on SMB Performance, is up now.  When I have some more time, I’m going to write a bit on the impact of packet loss on SMB connections on a WAN link…

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SMB/CIFS Performance Over WAN Links

I often have customers who ask me to wrestle with the performance of SMB (otherwise known as CIFS) across a WAN link.  Their experience is usually that file transfers from Windows Explorer or from the command prompt don’t meet their expectations of their inter-site link, even when FTP (ewwww!) performs much better. Background There are…

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Quick Figuring Optimal TCP Window Size

There generally isn’t a single correct way to figure out the optimal TCP window for an interface since you’re probably connecting to different hosts across different links at different latencies; however, you can roughly guess what the optimal window would be if you’re only primarily worried about your communication with one other host (or, perhaps,…

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