December 2006

It’s great when computers can do things for you

December 22, 2006

I hate building packages, but it’s a necessary part of the job sometimes. I have loved checkinstall for years, which basically replaces “make install” with something more like “make an rpm package for me”. But of course, when you have a simple tarball, and there’s no make install step to replace, then what ? One [...]

Read the full article →

watching who’s talking to who, and about what

December 22, 2006

1 – I’m glad that tcpdump has been the standard for capturing network traffic, cause I’ve learned a lot over the past 12 years using it. 2 – tcpdump tools suck. But I’ve been using pktstat recently, and it’s pretty damn good. ‘top’ for network, without all that stuff that ntop comes with.

Read the full article →

TCP bug

December 21, 2006

when you see this: (loaded box, lots of network, 2.6.9.x kernel, etc.) Dec 21 04:05:58 hostname kernel: ————[ cut here ]———— Dec 21 04:05:58 hostname kernel: kernel BUG at net/ipv4/tcp_output.c:927! Dec 21 04:05:58 hostname kernel: invalid operand: 0000 [#1] Dec 21 04:05:58 hostname kernel: SMP do this: Add to sysctl.conf: net.ipv4.tcp_retrans_collapse = 0

Read the full article →

Varnish and the state of web caching

December 16, 2006

So there’s lots of excitement around Varnish, which is a caching proxy that is built to be first and foremost a reverse-proxy, as opposed to squid, which does both forward and reverse. Acceleration (reverse-proxying) is obviously important to us at Flickr, as we use squid extensively.

Read the full article →

memory fragmentation in squid and some solutions….

December 12, 2006

Taking a look here, it seems like linking squid against TCmalloc could be pretty damn beneficial. UPDATE: done, and tested.  not in production yet, we’ll see if I can get to it soon.

Read the full article →

the thing for the thing

December 12, 2006

Technorati Profile

Read the full article →

Hats and beards

December 12, 2006

http://flickr.com/photos/allspaw/311471361/

Read the full article →

slides from WebBuilder2.0

December 11, 2006

I’m not 100% sure where FTPOnline will put my slides…if I don’t find out soon, then I’ll put them here. This is a description of the talk I gave, and here are the slides.

Read the full article →

new stuff here

December 11, 2006

Alright, it’s not the most original or groundbreaking blog theme ever, but here it is, let’s see if I can’t try to post something once a day.

Read the full article →