Dave

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Dave last won the day on November 9

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237 Beacon of Hope

About Dave

  • Rank
    boing
  • Birthday 06/04/85

Contact Methods

  • Website URL
    https://xyloid.org/

Profile Information

  • Gender
    Male
  • Location
    UK
  • College Major/Degree
    Mathematics, University of Warwick
  • Favorite Area of Science
    Mathematics
  • Biography
    I'm a lecturer at a UK university.
  • Occupation
    Lecturer (Engineering)
  1. So things look like they have improved quite a bit over the last few hours. Looking at our server load averages for the last 12 hours, it's been quite clear that the load has reduced and SFN feels a lot more responsive. We'll see how we can do in relation to the 'bad gateway' issue over the next few days.
  2. Okay all, I have changed another couple of IPB-specific options. Initial observations are encouraging (disk I/O has been reduced considerably), so let's see if this performs any better...
  3. Both Cap'n and I have been looking over this in the last few days. It looks to me like there is some kind of database issue, specifically with the InnoDB format that's now required by the forum software. This seems to be a lot more write-heavy, for some reason, and it's causing PHP processes to hang, which consequently run out and give the bad gateway error. I'm looking into why this is the case. I've tweaked a few more parameters tonight, let me know if you are all getting slowness still.
  4. As you might be aware, websites are increasingly turning towards secure HTTP (HTTPS) in order to increase security and safeguard user privacy. Browsers such as Google Chrome are placing increasingly stringent requirements on non-secure websites, so we have been investigating switching to HTTPS by default. At SFN, we're planning to trial this from next weekend. Since our forum software only supports one protocol or the other, we are planning to switch over to HTTPS next weekend. From your perspective you should see very little difference, asides from a nice green padlock symbol on your browser bar. However it's also possible that, for a short while, you might see some warnings about certificates being insecure, or mixed-content warnings, whilst we complete the transition. We'll post again here to let you know once HTTPS has been enabled.
  5. New Forum Design?

    Just to clarify and allay your concerns on this point: this is not the case at all. (Nor was it Capn's point.) SFN is operating in exactly the same manner today as it did yesterday and for the preceding decade, i.e. entirely independently. We've simply updated our forum software, and Invision is the company that provides the software.
  6. Welcome to the upgraded SFN

    There's now an updated thread in the maths forums that describes some of the changes to the LaTeX rendering.
  7. After a recent update to our forum software, typesetting equations on SFN has changed a little bit. Although we are still using LaTeX, for a variety of reasons, we've elected to shift over from our custom-written LaTeX generator to the excellent MathJax library, which will take your equations from post text and render them in your browser. Much as before, the idea is that in your post, you surround equations with special characters, and MathJax will convert the contained text into an equation for you. There's two types of equation that you can typeset: Inline math is displayed in the flow of a sentence, such as \( y= x^2 \). This example was produced by using the text \( y=x^2 \). Note that we do not support $ signs as most LaTeX users would be familiar with, since this occurs too frequently in text. Display math breaks up a paragraph and can be used for typesetting larger equations such as \[ y = \int f(x) dx. \] The text then picks up afterwards. This example was produced by using the text \[ y = \int f(x) dx \] , which we note is exactly what one would type in a usual LaTeX document. For reference, the old guide is still available and has a number of useful examples for those getting started. Finally, please note that for legacy posts, the old [math] [/math] tags will still continue to work and these will display equations as inline. However it's likely that older posts may look different to the way that they did before.
  8. You can't be Serious

    Just a quick note: if you want a single line break (instead of a paragraph) hit "shift+return" instead of just return. Additionally, for LaTeX, you can use the math BBCode as before, or you can use more standard notation to add display equations, e.g: \[\mathcal{F}(k) = \int_{-\infty}^{\infty} f(x)e^{ikx} dx \] produces \[\mathcal{F}(k) = \int_{-\infty}^{\infty} f(x)e^{ikx} dx \] I'll try to update the LaTeX guide as soon as I get a chance to reflect these updates.
  9. Welcome to the upgraded SFN

    One additional note from me: we no longer use our older LaTeX rendering system in favour of a browser-rendered MathJax, for various technical reasons to do with the way that posts are parsed and stored in this new forum software. The syntax for using our typesetting is exactly the same as before, but you will probably notice some rendering differences, particularly in older posts. Do let us know if there are technical issues on this front!
  10. New Forum Design?

    Just to throw in my two cents as well: this was an update that we really needed to perform, primarily due to security concerns of the older software being outdated (for around 2 years now, in fact). We'll do our best to smooth over any quirks of the updated software.
  11. Malware Warnings

    We'll schedule the IPS4 upgrade before the end of the month - our test install ran pretty well, so we can go ahead once we get a free block of time. In terms of the problem above, I am not convinced it's us that caused the redirect. The offending code is not currently present, as far as we can tell, so I would be more inclined to think it was the public wifi.
  12. Hi all, Apologies, once more, for the downtime today (around the last 6-7 hours). Unfortunately, our server hosts experienced a major power outage this afternoon and the server did not automatically restart when the power came back up. Everything should now be back up, but please let me know if you encounter issues. Dave
  13. Malware Warnings

    Hi Dan, thanks for getting in touch - we had spotted this a few weeks ago, but the template cache did not get rebuilt so it has been lingering on a few pages. I have now rebuilt the caches and removed the offending code. It seems that there is some unknown attack vector, we believe inside IP.Board 3, that is allowing this to reoccur, since there are no other server infarctions and no out-of-place or different files from the original IPB installation. We're scheduling an update to IPS4 which should hopefully permanently eliminate this issue, but the update affects quite a bit of the site, so we have to do a little planning first.
  14. Okay I think I tracked this down -- let me know if this is now fixed! Hope you're all having a good Christmas & Boxing Day
  15. Thanks guys - will take a look this morning.