For some reason the device /dev/rawctl has a habit of disappearing. This can be fixed by creating the device file /dev/rawctl with the major/minor number 162,0

mknod /dev/rawctl c 162 0
 

This will allow /dev/raw devices to be created. However /dev/raw/raw0 cannot be used since 162,0 is used by /dev/rawctl.

So, assume I have a git repository on an iDisk, mounted to my mac a /Volumes/garyjlittle. I also have a dropbox account mounted to /Dropbox.

I have a directory called ~/scripts on several machines (home and work) that I keep synchronized and version contolled using git.

Now, I want to move a git repository called “scripts” from iDisk to Dropbox.

Here’s what I do. I have a subdir called ‘git’ on my Dropbox drive, and within there I have a bunch of ‘bare’ repositories – because I always make edits in ~/scripts. The directory /Dropbox/git/scripts.git is just there to be a shared resource to push/pull from.

Make the directory hierarchy in Dropbox.

lovebox:[~] $ mkdir /Dropbox/git
lovebox:[~] $ mkdir /Dropbox/git/scripts.git

Change directory to the Dropbox script directory we just created.

lovebox:[~] $ cd /Dropbox/git/scripts.git
 

Now inititalize that directory as a git bare repository.

lovebox:[/Dropbox/git/scripts.git] $ git init --shared --bare

Now go to the iDisk directory which currently holds the bare repository

lovebox:[~] $ cd /Volumes/garyjlittle/scripts

And push over the repository to the new Dropbox location.

lovebox:[/Volumes/garyjlittle/scripts] $ git push --mirror /Dropbox/git/scripts.git/

Counting objects: 49, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (49/49), done.
Writing objects: 100% (49/49), 21.52 KiB, done.
Total 49 (delta 18), reused 0 (delta 0)
Unpacking objects: 100% (49/49), done.
To /Dropbox/git/scripts.git/
 * [new branch]      master -> master

Now we have to tell each remote location that the shared repository has changed. It’s easiest to just rename the old directory from ~/scripts to ~/old.scripts. And then do a git clone from the new Dropbox git location.

lovebox:[~] $ mv scripts/ old.scripts

lovebox:[~] $ git clone /Dropbox/git/scripts.git/ scripts
Initialized empty Git repository in /Users/gjl/scripts/.git/
lovebox:[~] $ cd scripts

You might notice (as I did) that there are fewer scripts in the new ~/scripts directory. That’s probably because not all of the scripts really were under git control. This could be a good time for housekeeping. Add in the scripts that you really want to keep under git version control, and get rid of the crufty old one-time stuff that inevitably builds up over time.

Page http://omniti.com/surge/2010/speakers/neil-gunther

Slides http://s.omniti.net/surge/i/content/slides/NeilGunther.pdf

Neil Gunther on Scalability at SurgeCon 2010

Terrible audio, but worth listening to.

Google performance testing