ANDREW PENG » Notes

2^128 is a really big number

andrew — Tue, 02 Aug 2011 10:04:15 +0000

~ $ dig andrewpeng.net aaaa +short
2607:f298:1:104::a53:ecdd

~ $

What the hell is that? It’s my shiny new IPv6 address! Dreamhost makes it stupid easy to assign a IPv6 address to your account; just log into your panel, click on your domain, then just click Add IP Address and that’s it.

I also added an AAAA record for ipv6.andrewpeng.net to make sure to make the distinction for the IPv6 only subdomain, similar to ipv6.google.com and such. If you have IPv6 connectivity, go ahead and give it a try!

Crisis Averted

andrew — Sat, 23 Jul 2011 00:45:41 +0000

Really thought I lost the LVM share. There might actually be a bug in the PowerPC Debian kernel that causes it to kernel panic on large LVM partitions. Ever since I switched to an Athlon MP server from my old PowerMac, it hasn’t kernel panicked since. Nice to have a large network drive at home again. Gonna take the plunge and convert the partition to ext4 while I’m at it.

pengc99@zeus:~$ sudo fsck.ext4 -fvy -C 0 /dev/mapper/MASS_STORAGE-STORAGE_LV
e2fsck 1.41.12 (17-May-2010)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

342541 inodes used (0.19%)
1892 non-contiguous files (0.6%)
178 non-contiguous directories (0.1%)
# of inodes with ind/dind/tind blocks: 57159/9867/16
333728343 blocks used (91.11%)
0 bad blocks
57 large files

321274 regular files
21258 directories
0 character device files
0 block device files
0 fifos
0 links
0 symbolic links (0 fast symbolic links)
0 sockets
——–
342532 files
pengc99@zeus:~$

A Legacy Concluded

andrew — Tue, 12 Jul 2011 05:09:35 +0000

[Source: arockalypse on Reddit / Flickr]

Be nice to your servers

andrew — Fri, 01 Jul 2011 14:00:16 +0000

http://www.youtube.com/watch?v=tDacjrSCeq4

Yelling at your servers can measurably negatively affect their performance. No joke. Make sure to treat your servers with respect, and keep it quiet in the datacenter!

Perhaps there is a “brown note” for disks (“rust note”?) – some harmonic that destroys their performance; although based on what we think is happening (disk heads being thrown off track), we think this has more to do with shock force than resonance. I’m sure there are disk vendor engineers out there who know all about this (Bryan links to a good reference in his blog entry).

[Source: Sun Microsystems Blog (now Oracle)]

Snow? In my state? (Edit: ice lolololol)

andrew — Fri, 04 Feb 2011 13:03:35 +0000

Houston gets an onset of cold weather (mid – high 20′s) and a little bit of freezing rain / sleet while I’m at work. While on break I walk around to check out the condition of roads…while most of the surface streets seem fine, our sidewalk at work is coated in a sheet of slick ice, and our Employee of the Month sign is very frosty looking:

Back in the toasty confines of my swampy gator-cubicle, I check the traffic conditions for Houston and this is what I get:

Awesome, just awesome. Thanks to @Snipa_ABlair for the photo.

Online image editing

andrew — Mon, 15 Nov 2010 12:45:31 +0000

If you’re using a computer that is otherwise not your own, and need a good image editor to do a little photo manipulation, I’ve always found Pixlr to be a great stopgap between that full install of pirated Adobe Photoshop! (aaaaarg!)

Minidlna and custom upnp icons

andrew — Fri, 19 Mar 2010 22:22:43 +0000

After a few hours of digging into hex and binary conversion tools, I have completed my task. If you download and compile Minidlna on a Linux box, it will show a Tux penguin for it’s upnp icon (for instance, if you were browsing over the network on the PS3). Since my Minidlna server is PowerMac G4 running Debian, I converted a few PNG images of the Apple logo into it’s hexadecimal equivalent, changed the source file icons.c, and recompiled it. Done! Click here to get the updated icons.c file.

Installing miniDLNA on Ubuntu PowerPC

andrew — Thu, 04 Mar 2010 08:00:32 +0000

I don’t think I’ve seen anyone maintaining packages for the excellent MiniDLNA media server for Debian or Ubuntu. The instructions provided here should work for both Intel and PPC builds (maybe others?) of Ubuntu and Debian Linux.

Run this command to get the pre-req packages needed to build MiniDLNA:
- sudo apt-get install libexif-dev libjpeg62-dev libid3tag0-dev libflac-dev libvorbis-dev libsqlite3-dev libavformat-dev cvs make
Log in and check out (download) the source code for MiniDLNA from SourceForge:
- cvs -z3 -d:pserver:anonymous@minidlna.cvs.sourceforge.net:/cvsroot/minidlna co -P minidlna
Change into the directory and build, then install it!
- make
- sudo make install
That’s it!

Boston via cameraphone – Friday Feb. 26

andrew — Sat, 27 Feb 2010 04:23:47 +0000

Boston via cameraphone – Thursday Feb. 25

andrew — Sat, 27 Feb 2010 04:20:22 +0000