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Monty Linden

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Posts posted by Monty Linden

  1. 3 hours ago, Coffee Pancake said:

    Don't let that stop you ... accept features are carefully placed in a large field full of triffids, where they might one day ...

    Yup, never give up.  Follow Lucia's example.  :)  Wasn't at the triage today so don't know about the why.  I will say it's not for a lack of governance activity.

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  2. 42 minutes ago, Ardy Lay said:

    "Oh, so that's what 'velocity factor' means!", he shouted a few minutes later.  He had taken notes, did the math, then showed it to me.

    This reminds me of a story I read when very young and probably recall incorrectly now.  When one of the first sea cables was being laid, a problem came up with the electrical performance of the cable.  (This may have been the cable laid by Brunel's Great Eastern.)  So they asked Edison to come in and have a look at the problem.  Being a tinkerer and no fan of Maxwell, he did what he knew and wired up a telegraph set:  battery, key, spool, sounder.  Oh, and the spool was one continuous run of 500 or 1000 miles of cable in a massive hold.  Edison checked his work and closed the key and...  nothing.  Open, close, open, close... nothing happened.  He finally just closed the key and waited.  Several hours later, the sounder closed.  The inductance of that coil was such that it took that long to build enough of a magnetic field to allow sufficient current to close the sounder.

  3. 13 minutes ago, Ardy Lay said:

    I wonder if some sort of tunnel could be used by subscribers to encapsulate their UDP traffic within a long-life TCP flow, to get away from the "UDP is expandable" attitude coded into much of the equipment that makes up The Internet?

    Using a *TCP* VPN could be a way of improving things where capacity is otherwise available.  But it can all go wrong still:

    • It (partially) moves the choke point from the cable to the VPN ingress as UDP packet loss is turned into TCP retransmits and backpressure.  If that ingress prioritizes stupidly or has other shortcomings, the experience won't be good.
    • You don't pay attention and use a UDP VPN protocol turning your TCP into UDP and making the entire experience worse.

    I'd really love to see experiments done and results shared here.  I expect results to vary wildly based on location, local ISP, backbone carrier, VPN, and time.

  4. Cable ingress has traditionally been a choke point where traffic may be shed.  I've frequently seen problems on cable hops.  There are no alternatives but the new cables are getting faster and faster (bandwidth, not latency).

  5. I've confirmed that there are no automatic processes in place.  Creating an account, copying an account, and setting the IP flag all require support activity.  Any appearance of things working without manual intervention is strictly magical.  Tír na nÓg

  6. DM or email (monty @) information to narrow the search:  target URL, date, time (and timezone), region where requests were launched.  Both for the normal script and test script cases.

    The usual answer is that dealing with 5xx is something to be expected but there are exceptional cases where we can show the endpoint is behaving badly or a sea cable is involved.  But HTTP Out generates over 10K 5xx status returns a minute.  It's very normal.

  7. 2 hours ago, Whirly Fizzle said:

    Can we get it cloned onto Agni please?  :) 

    That might be possible with a little paranoia.  Trying to recover TextureTest2 right now.  I'm afraid it may have joined the alumni...

    (Hmm, it's back.)

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  8. On 7/27/2021 at 2:06 PM, Ardy Lay said:

    Could the Second Life Viewer, and derivative works, have some sort of CDN validation mechanism?  I know that anycast-IP routing can be used to hijack CDN queries without modifying DNS queries or results.  Could a method be employed to thwart such efforts?  What would be the desired action in the viewer when such hooliganism is detected?

    End-to-end encryption but you have to be willing to pay for it.

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