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1  General Category / General Discussion / Re: Globalscale Technologies Advice Please? on: January 06, 2010, 02:55:12 PM
Valkyrie

I cannot let your comment stand unchallenged.

It is racist, personally offensive, lazy, and, as it happens, entirely wrong.

And a moment's work would have revealed the errors.

Damon
2  General Category / General Discussion / Re: 3 weeks, no sign of my plug.. :( on: December 25, 2009, 05:32:32 AM
Happy Christmas to you too.

Rgds

Damon
3  General Category / Application ideas and development Q/A / Re: Java on Gentoo? on: December 23, 2009, 03:59:55 PM
OK, sorry that didn't help.  Gentoo is a mystery to me...  I just about understand Debian/Ubuntu/RedHat!

But do try sending of of the guys on that project an email and see if they have any suggestions.

Rgds

Damon
4  General Category / Application ideas and development Q/A / Re: Java on Gentoo? on: December 22, 2009, 01:13:25 PM
Xerxes built me a binary of the JDK that I have used with some success, see his site at:

http://labb.zafena.se/

In particular try:

http://labb.zafena.se/shark-testing/armv5/

and give some feedback!

Also maybe join the zero-dev mailing list at IcedTea: it's pretty low volume.

http://mail.openjdk.java.net/mailman/listinfo/zero-dev

Rgds

Damon
5  Hardware and U-Boot firmware / Hardware / Re: Plug as an NTP stratum-1 server on: December 21, 2009, 12:54:40 AM
NTP, even with a radio clock, shouldn't need to poll/wakeup that often.  I managed to use a 30 baud radio clock where it couldn't muster that many interrupts if it tried!

Rgds

Damon
6  General Category / Application ideas and development Q/A / Re: Java on Gentoo? on: December 20, 2009, 03:35:22 AM
Have you tried building the IcedTea versions?

If nothing else there's a lot of work going on with the Zero/Shark version to keep ports fresh and a decent HotSpot for ARM.

I'm currently using Sun's 'embedded' JRE on Ubuntu on the plug, which works well, but I hope to be able to switch to the Zero/Shark JVM for some uses soon.

Rgds

Damon
7  General Category / General Discussion / Re: SD Card Newbie Questions. on: December 19, 2009, 12:46:51 PM
Fixed: sorry about that!

Rgds

Damon
8  General Category / General Discussion / Re: Newbie question: Where are the dev tools like gcc, make etc? on: December 19, 2009, 10:48:25 AM
Ah, that may indeed have been how I did it...

Rgds

Damon
9  General Category / General Discussion / Re: SD Card Newbie Questions. on: December 19, 2009, 10:46:12 AM
I believe that the maximum *possible* in SDHC is 32GB (and I have one!) by the spec.

There may of course be another spec that allows more memory amd the cards may look the same, but I don't think it will be called "SDHC".

Rgds

Damon

PS. Edited to make sense!
10  General Category / General Discussion / Re: Newbie question: Where are the dev tools like gcc, make etc? on: December 18, 2009, 01:01:26 PM
apt-get install make

At a guess, can't remember how I did install it...

Rgds

Damon
11  General Category / Application ideas and development Q/A / Re: Micro Datacenter: Requirements? How to?? on: December 17, 2009, 02:13:29 AM
When you say 'free' space do you mean free virtual memory space?

The default on Linux these days seems to be to allocate 8M for each thread's stack, which is WAAAAAY more than is needed for (eg) Apache.

I tuned (in the rc shell scripts) Apache and a couple of other apps to use much less, well under 1MB, and also to run fewer processes and threads, which is fine unless you have a very busy site.  I support multiple Apache static sites and sendmail and NTP and a complex Java Web site and various other things on the plug.

Rgds

Damon
12  Hardware and U-Boot firmware / Hardware / Re: Plug as an NTP stratum-1 server on: December 16, 2009, 02:23:07 PM
Running as stratum-1 means that you can provide a better public service and provide another independent 'top' node in the NTP network...

So why not?  B^>

Rgds

Damon
13  Hardware and U-Boot firmware / Hardware / Re: Choosing a USB powered hard drive for the Sheeva on: December 16, 2009, 12:42:59 PM
Go to the dark side and get USB flash if you can afford it!  B^>

(Crusty old UNIX apple anecdote alert: my USB thumbdrive has about 100x the storage capacity that my entire uni had across all departments and campuses when I was a first-year student!)

Rgds

Damon
14  Hardware and U-Boot firmware / Hardware / Re: Choosing a USB powered hard drive for the Sheeva on: December 16, 2009, 11:32:41 AM
I'm using a 128GB (not MB) USB thumbdrive for bulk storage for one particular application of mine, and clearly power consumption from USB is then not a make-or-break issue.

But beware: if you care about power consumption and use a USB hub then the hub won't power down automatically since the kernel doesn't know when it can suspend media devices, which then in turn wastes significant power in the hub and through CPU wakeups.

My plug also has a 32GB SD card for large partitions such as /home, and I boot from NAND, so I apply multiple strategies to reduce write load.

http://www.earth.org.uk/note-on-SheevaPlug-setup.html

The previous system used a 4GB SD card for booting/root and, using similar strategies, showed no sign of write stress over the course of a year or more.

Rgds

Damon
15  Linux Stuff / General Linux questions / Re: Is there a way to check to see if debian is looking in /etc/fstab upon boot? on: December 14, 2009, 12:11:13 PM
Have you tried a manual 'mount -a' when you get to some sort of shell prompt?  That will use fstab to decide what to mount and how.

Rgds

Damon
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