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Hello , sorry for the confusing title ,I do not speak english as my first language.(and also sorry if the topic does not fit here)
Problem background: I just want to create a website as a competitive program grader for my school. Like complie and run source code on the server. So below is my idea and i would like some help/suggestions before i do it,I still don't know if this will work.
The problem one is that i would use one of the table as my user-submission queue.When user submit a code, I first put it in this table(i suppose it put the new row in the bottom of the table?) .
Python program usage:
I would run a 24/7 program on my server that check every 10 second if the queue table is not empty, just run the grading process(I know how to do it) and then pop it off the queue.Then check again.
When a person submit code, i will use php to put it on the queue table,but it may be the same time my python program is popping something off the queue table too. This is where I get confuse whether it will work or not.(Other usage of the php is just things about web interface which I had done before and know what to do)
So,would this idea even work? Will it break my server or something?As a competitive programmer guy I don't know much snd will greatly appreciate any help from u guys. :)
Thank you very much.
OVH offers users the choice of using its modified custom Linux kernels or the regular distro's kernel. Ubuntu's license contains a clause that requires anyone who distributes a modified version of Ubuntu to get approval from Ubuntu and pay a license fee to use the Ubuntu mark. Canonical/Ubuntu wants OVH to pay a licensing fee of 1-2 euros monthly for each installation which over the course of a year would amount to about 1 million euros. According to the article Canonical (owner of Ubuntu) is also asking Dreamhost, which also uses a modified version of Ubuntu, to pay a licensing fee.
(google translate was invented so you could read the French articles I link to) http://www.clubic.com/pro/actualite-e-business/actualite-809784-ubuntu-canonical-payer-ovh.html
I am excited by the potential of this project. It's early yet, so cutting edge and not polished if your OS and desktop isn't what they are building for.
Shashlik allows you to run Android apps on Ubuntu, so long as you are running KDE. Others, good luck, try it and maybe we can help kick solutions back to the authors.
This is for Kubuntu:
ArchLinux and Github links over here: http://www.shashlik.io/download/
Place you can grab famous software APKs from: http://apkpure.com/
Someone give it a spin. My Linux Mint environment installs it, but no dice getting anything to work. Going to spin up VirtualBox Kubuntu install later and see if it will work under that.
I've recently been having problems with my Ubuntu VPS on my Windows server. I have access to both the Host node and the guest node (since this is a multi-use server and I wanted to use both Windows and Linux services), and I guess I thought I set it up properly but it seems there's a networking problem on the server.
There's periods when the Ubuntu VM has major packet loss while the actual host server is mostly fine. Sometimes when I'm rsyncing large files (12 GB worth of files), the network gets dropped on the entire Ubuntu VM and I get the error "ping: sendmsg: No buffer space available". This was reproducible whenever I'd rsync out larger files.
Basic research shows this is usually due to an incompatibility of the on-board NIC on the Server (of course this is assuming Ubuntu was installed on the base hardware, not within a VM). I'm assuming this is a problem with my bridge setup.
Anyways, this is a Hyper-V Generation 1 VM. The bridge is basically all default variables requested when setting it up through the Wizard available on the Windows Server 2012 R2 (Datacenter Edition). Upon further Google Searching, I've found that we have to increase the memory allocation for the packets, and was suggested I add the following lines into sysctl:
net.core.rmem_max=16777216 net.core.wmem_max=16777216 net.ipv4.tcp_rmem=4096 87380 16777216 net.ipv4.tcp_wmem=4096 65536 16777216 In addition, the following command was executed: echo 83886080 > /proc/sys/net/core/wmem_max
Anyways, even with these changes I'm still having some problems. Anyone know of a good way to start troubleshooting this issue?