Xen Dom0 Installation

March 5th, 2007 No comments

Just a quick note:

  1. Xensource has all the RPMs needed to install Dom0/DomU on CentOS 4.4, including special glibc.
  2. Ubuntu LTS does not. And all recipes so far fail to produce satisfactory results.

Conclusion: at least for Dom0, use CentOS, not Ubuntu. This may change over the next few months, but for the time being CentOS is the way to go.

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CIFS note

March 4th, 2007 No comments

When using CIFS in Ubuntu (and probably elsewhere), make sure smbfs is installed otherwise you can waste all sorts of time tracking down helpful dmesg error messages like “cifs error -22”.

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Generate MAC Addresses

March 3rd, 2007 1 comment

Here’s some simple code to generate more-or-less random MAC addresses:

python -c 'import random; r=random.randint;
print "00:16:3E:%02X:%02X:%02X" % (r(0, 0x7f), r(0, 0xff), r(0, 0xff))'
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Alfresco 2.0

March 3rd, 2007 No comments

Installed Alfresco 2.0 on Centos 4.4 running under Xen and switched from the JBoss to Tomcat release – initial impression is that it’s much more responsive.

Did a couple of simple tests with Brendan, pretty basic stuff and immediately ran into problems. First, he invited me to edit a file in his user space, and I couldn’t. Second, he started a discussion and I was able to inadvertently overwrite his post.

Otherwise, Alfresco does a nice job of versioning, provides basic authentication and convenient access via CIFS, NFS, WebDAV etc.

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Pika MonteCarlo 6.4 issues

February 27th, 2007 No comments

After digging up my password, no mean feat itself, I downloaded and installed MC 6.4 for RHEL 4.4 – binary RPMs all the way. You must install on a system that Pika supports, right down to the kernel version. As far as I can tell, even the kernel objects are prebuilt. Compared to Sangoma or Digium, this is a real pain in the neck. Not sure how Pika plans to address this in the future but I suspect users familiar with Open Source will not see sufficient added value and choose a more “open” platform.

Anyway, the install made it most of the way then quit. Hunting around the disk, I found pikainline.ko but no corresponding /dev/pikainline0 node. Got nowhere trying mknod with some old device numbers gleaned from old MC docs. Pika tech support set me straight with 242 as the major number. All is now well.

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