It seems that tbf shaper qdisc has been classful since sometime around the introduction of Linux 2.6.1. I think I’m going to play with attaching various classless and classful qdiscs to see what kind of results I obtain. Should be interesting. I am thinking perhaps tbf -> prio -> sfq or htb -> prio -> tbf -> sfq just for kicks. There doesn’t seem to be any available documentation except the changes in sch_tbf.c itself.

I have spent the past some weeks working on graphing traffic control information with RRDTool, so objective conclusions can be reached as to the effectiveness of particular shaping configurations with Linux’s traffic control facilities. Since nothing special was going on at the LUG meeting tonight, I did a brief presentation of what I had completed so far.

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I finally finished up my Exim4 and Courier IMAP guide, which is a near complete rewrite of the original version I wrote for configuring Exim3 with Courier on Debian Woody. The new guide should be current the upcoming release of Debian Sarge, should that event ever actually take place.

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I have heard almost nothing but good things about Philips’ DVP642. I finally ordered one in July from Amazon as they had the cheapest price at the time. It was on backorder for a month, during which time the price rose around $10. Nevertheless, I still snagged the player at a good price.

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Excellent. Now I can bump up my fileserver to 768MB of RAM. That ought to be plenty for the stuff I do with it. More would be nice, but I rarely push around files large enough for NFS to need more memory. I really need to look into NFSv4 for Linux, but haven’t had time yet.