Linux


We recently received two Vodafone HSDPA cards. Under Mandriva 2007, getting them to work is quite trivial. Insert the card, run Mandriva Control Center->Network & Internet->Set up a new network interface.

It finds the card:

HSDPA 1

Enter the PIN for the SIM card:

HSDPA 1

Choose whichever non-Unlisted network it finds:

HSDPA 1

The provider is unlisted at present. I guess I should submit a patch or file a bug report with the provider details …

HSDPA 1

Set the access point name, “Internet” for Vodacom:

HSDPA 1

Set some options:

HSDPA 1

If you choose to start the connection on the next screen, you will be connected:

HSDPA 1

Another nice feature in 2007.0 is VPN support, and the ability to associate VPN connections to a network connection. So, if I had configured my OpenVPN connection first, I would have been offered to associate it to the 3G/HSDPA connection during setup, and bringing the 3G HSDPA connection up (via ifup or the Mandriva net_applet) would start the VPN connection too. Really convenient.

Effect of modifications to /proc/cluster/lock_dlm/drop_count & drop_period

A Service request was logged to obtain more information regarding the impact of changing the default values set in the /proc/cluster/lock_dlm/* files.

# cat /proc/cluster/lock_dlm/drop_count
50000
# cat /proc/cluster/lock_dlm/drop_period
60

There is no documentation to highlight the impacts on the gfs cluster of modifying these two values, so an advanced configuration request was logged to obtain this information.

Response from RedHat

Greetings,

I do not have a definitive answer to your question, but I would request you to refer to below Red Hat Cluster list threads.
http://www.redhat.com/archives/linux-cluster/2005-February/msg00129.html
http://www.redhat.com/archives/linux-cluster/2005-January/msg00080.html
Can you let me know the reasons why you want to modify these parameters, is there any problem you are facing ?
I would request you to send me a sysreport of all the nodes so that I can consult with Sr.Engineer, and advice you.
Regards

This is obviously not what we were looking for, so I updated the ticket to inform them of this fact.

Update From Redhat

Hello Scott,
Am looking into this and will update you soon. I don’t think that sysreports are required at this point of time.

I will update this entry as and when I get a response from RedHat.

Further Update From RH:

Setting drop_count to 0 (or increasing it) will allow gfs to cache more locks which can dramatically improve performance in some cases. Allowing gfs to cache more locks will increase the chances that the dlm may run out of memory during recovery. I don’t think there’s any point in changing drop_period; it governs how often gfs will get drop-locks callbacks while the number of locks exceeds drop_count.

Pretty good podcast from this site…

www.lugradio.org

Here is the rss link: Lug Radio

Seems like those clever people at fs-driver have written a neat little app to allow both read and write access to linux ext2 files systems.
Immediately you can see the advantage for those people who run dual operating systems on their machines.
It looks like it works by installing some sort of kernel module to allow windows to use the ext2 file system. By mounting the file systems with drive letters, this allows all applications to be able to see the files and directories natively, resulting in no need to convert from one to the other. I am always sceptical of applications/tools like this and would be interested to see how reliable this software is.
Check the link for more details and download.

We’ve been considering having a blog for a while, and after a bit of browsing around (and even some pondering on writing our own), we decided on Wordpress. So … as usual, anything I install must have a package, so this installation is running off an initial package of Wordpress, and I hope to upload to cooker contrib once I’ve done the last few bits to make it comply with the Web apps policy.

The next question, of course, is whether - and how, to package themes and plugins for wordpress.