<br><br><div class="gmail_quote">On Thu, Jul 23, 2009 at 1:32 PM, Ed McNierney <span dir="ltr"><<a href="mailto:ed@laptop.org">ed@laptop.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Folks -<br>
<br>
If anyone is interested in following up on the wiki work being done to<br>
accurately document our physical servers, virtual machines, DNS names,<br>
services, and the connections/relationships among them it would be<br>
immensely valuable to OLPC. Even getting a firm answer to questions<br>
like "on what hardware is the <a href="http://www.laptop.org" target="_blank">www.laptop.org</a> site hosted?" is not<br>
easy, and the wiki documentation is sometimes misleading or simply<br>
wrong.<br>
<br>
I am trying to tackle a tiny piece of that puzzle by understanding OWL<br>
well enough to reconfigure it. Here's the motivation. Our large,<br>
production servers seem to be generally configured with RAID 5<br>
arrays. This is not an especially good choice for database storage,<br>
especially with concurrent writes and reads, and I've learned that our<br>
wiki generates a surprising amount of database updates and deletions.<br>
Our wiki server itself (separate from squid and download links to<br>
crank) is having performance problems under load. In addition, we<br>
have several MySQL instances floating about. I would like to set up<br>
one, solid, well-designed and well-documented MySQL server machine,<br>
and migrate the wiki databases to it.<br>
<br>
OWL is both a good physical candidate and lightly used. It is<br>
configured as a RAID 5 array and I would like to reconfigure it (or at<br>
least part of it) as a RAID 10 array for database storage. This is a<br>
much better performance choice, and even with a RAID 10 config the 8<br>
750 GB drives in that machine will give us 4 TB of storage. Since<br>
that will blow away everything on the machine, I'd like to move<br>
carefully.<br>
<br>
As far as I can tell, there are basically three things happening on<br>
OWL. Please take a moment to review these and let me know if I'm<br>
missing or misunderstanding something.<br>
<br>
1. There is a virtual machine called TEST and it appears to be the<br>
machine that serves <a href="http://test.laptop.org" target="_blank">http://test.laptop.org</a>. That site seems to serve<br>
only the page "It doesn't works!". I cannot log in to this VM and<br>
cannot learn anything else about it.<br>
<br>
2. There is a virtual machine called WWW2 that was alleged to be (see <a href="http://vig.laptop.org/wiki/index.php/Machine:www2" target="_blank">http://vig.laptop.org/wiki/index.php/Machine:www2</a>)<br>
the machine hosting <a href="http://www.laptop.org" target="_blank">www.laptop.org</a>, but it's not. I have suspended<br>
this VM and I can't figure out what it does. I cannot log into it, as<br>
I don't know its IP address, DNS name, or whether I have any account<br>
on it at all.<br>
<br>
3. There are 40 GB of backup files in the directory /home/sugarbackup/<br>
backup/sunjammer and more are added daily. There is no documentation<br>
whatsoever on the internal wiki or the VIG wiki about these files,<br>
this directory, or what is supposed to be happening here.<br>
<br>
The documentation at <a href="http://laptop.org/internalwiki/index.php/Machine:owl" target="_blank">http://laptop.org/internalwiki/index.php/Machine:owl</a><br>
claims this machine hosts VMs named wwwseth and vm_test, but it<br>
doesn't. The VM test seems to slightly resemble the machine vm_test<br>
documented at <a href="http://vig.laptop.org/wiki/index.php/Machine:vm_test" target="_blank">http://vig.laptop.org/wiki/index.php/Machine:vm_test</a> but<br>
it's not the same.<br>
<br>
PLEASE look over this information and - especially if you know<br>
anything about 1, 2, or 3 above - let me know what you know. It<br>
seems to be that #1 and #2 are indeed unimportant and can just go<br>
away. I'm not sure about #3, but no one seems to have written<br>
anything down about it so I can't tell.<br>
<br>
If you have thoughts on the topic of creating an optimized MySQL<br>
server machine (see <a href="http://laptop.org/internalwiki/index.php/" target="_blank">http://laptop.org/internalwiki/index.php/</a><br>
Machine:owl for the hardware specs) or on the proposal to create a<br>
single MySQL server to serve our various needs, I would appreciate<br>
hearing them. Thanks!<br>
<br>
- Ed<br>
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</blockquote></div><br><br>Speaking of domains, <a href="http://laptopgiving.org/">http://laptopgiving.org/</a> is parked with GoDaddy, but still shows up on the letter from NN, shipped with the XO (I just got one replacement XO today and noticed it says <a href="http://www.laptopgiving.org/start">www.laptopgiving.org/start</a> in the letter). Are we going to keep this domain?<br clear="all">
<br>Sameer<br>-- <br>Dr. Sameer Verma, Ph.D.<br>Associate Professor of Information Systems<br>San Francisco State University<br>San Francisco CA 94132 USA<br><a href="http://verma.sfsu.edu/">http://verma.sfsu.edu/</a><br>
<a href="http://opensource.sfsu.edu/">http://opensource.sfsu.edu/</a><br>