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Topics - tsoukas

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Users / Proper way to access > 4GB on LMCE 32 bit kernel?
« on: January 28, 2013, 04:53:39 pm »
Dear all,
Checking out an 8GB RAM server on a LMCE 10.04 w/RC, dmesg prints the following:
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[    0.000000] Initializing HighMem for node 0 (0002effe:0007f800)
[    0.000000] Memory: 2005284k/2088960k available (4699k kernel code, 46060k reserved, 2128k data, 664k init, 1283128k highmem)

This does not appear correct, (shouldnt 32bit see up to 4GB RAM?) and it seriously cripples a large system... (at a point, it was using 5GB of swap..)
I did some research and the only solution appears to use a PAE-enable kernel.

So I tried installing one with:
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sudo apt-get install linux-headers-server linux-image-server linux-server
And indeed, I could see the entire memory:

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dcerouter_1032148:/var/log/pluto# top
top - 17:39:06 up  2:29,  2 users,  load average: 0.64, 0.71, 0.72
Tasks: 273 total,   1 running, 272 sleeping,   0 stopped,   0 zombie
Cpu(s): 13.1%us,  5.2%sy,  0.6%ni, 68.6%id, 12.0%wa,  0.0%hi,  0.5%si,  0.0%st
Mem:   8201900k total,  5062680k used,  3139220k free,   314256k buffers
Swap:  5907448k total,        0k used,  5907448k free,  3420992k cached

The only problem so far is that HAL kept dying, which is not really convenient (for an LMCE server, that is..)
Any recommendations? Should HAL die because of this could there be another issue with it?


Users / php.ini modification for creation of many MD's through LMCE admin
« on: January 28, 2013, 04:40:46 pm »
Dear all,

It seems that lately I am stretching the LMCE to its limits!
I decided to help a friend that fell in love with LinuxMCE (but has no technical knowhow whatsover...) to install a large system (>10 MD's) at his home.
(see post,12986.msg93795.html#msg93795 for some of the issues I have experience so far)

During the installation of the 16th MD, the LMCE web admin screen seemed unable to register any of the changes performed on the last MD. (I had to manually create it, since it had a Realtek 8168 card...).

After a number of attempts, i discovered the following error message:
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[Mon Jan 21 20:41:57 2013] [error] [client] PHP Warning:  Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0, referer:
[Mon Jan 21 20:41:57 2013] [error] [client] PHP Warning:  Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0, referer:

Solution is to insert the following, in /etc/php.ini
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max_input_vars = 2000
(Dont forget to reload apache after this, with: apache2ctl restart)

I am not sure what the consequences of this are (memory wise), but this is the only way I managed to have a working LMCE admin interface again.

Hope its useful to someone,

Installation issues / Strange NFS issue (or not)...
« on: November 12, 2012, 11:57:44 pm »
Dear community,
Here's something that I never saw before... After convincing a friend to go the linuxmce way (instead of going AMX/Crestron/Vantage), i help him setup 10 rooms and a hybrid/core as a server.
Installation was successful (system will be used for A/V distribution only and all mediaboxes are in the dedicated computer room), and systems one after the other were configured successfully.
When the last one finished, the whole system was powered down and the hybrid/core was powered on first. After a while, WOL kicked in.
This is where the things start to get strange:
  • out of the 10 media boxes, 5 booted normally and 5 were stuck to the "Mounting root file system. What was amazing was that (even though all booted at the same time through WOL, first one was ok, second was not, third was ok, etc).
  • after having booted successfully the five of them, i started to (manually) close and boot each one. The sixth came out ok. When the 7th was booted, performance started to degrade considerably, and then all hell broke loose. Core started to reload continuously, proxy&web orbiter crashed whenever the room was selected, etc
  • When the 7th media director was powered down, everything was normal again!

Now you might say that 6 is my lucky number, but is there anything I can do to enhance/correct NFS performance (as to allow for all 10 media box to boot concurrently)? Is this the problem or should I be looking at anything else?
Hybrid/core is an IBM x3250m3 with 4GB ram, media directors are Xsrteamer Ultra boxes with 2GB each and all are connected on a 24-port gigabit ethernet switch.
Any ideas?


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