We have 5 servers here. What we are going to setup is not a Web server. We want to combine these servers to parallel calculating. I have searched for some information. May be cloud computing would be our choice. I don't know whether I am right.and if I decide to use the cloud, is Ubuntu server my best choice?Can anyone give me some clue about this?
View 4 RepliesWe are planning on rolling out a mail service that will backend a webmail/groupware interface using postfix and dovecot, and we are trying to nail down an architecture for the system. I was hoping I could get some opinions from you good people on the different models we have come up with, and any improvements. To preface this discussion, we use NFS as the backend storage for mail so that clusters of mail servers can be created.
One possible solution is to separate three services, inbound email, outbound email, and message retrieval onto separate servers. We currently run a mail system with 65K users in this manner and it works, but there is a lot of wasted cpu on the inbound and outbound mail servers. where the dovecot servers are doing most of the work.
Another solution would be to combine the dovecot and inbound postfix servers to run dovecot as the local transport agent for postfix with LMTP, giving us quota and sieve capability.
The last solution is to run all three services on the same machine, giving us a single server image that we can clone on demand when we need to add more performance.
The single server, all three services, solution seems to be the simplest to build and manage, but putting all your eggs in one basket like that concerns us. What if there is a sudden influx of mail from our filtering platform, and it slows down all the other processes? What if the NFS server becomes disconnected from the network and the load average on each server skyrockets killing the ability for outbound mail to flow (where a separate outbound mail server would continue running despite this issue)?
i found this video, and i really want to do the same. *newbie needs to learn [URL]...my question is, what need to be installed and how?
is there any specific configuration to make it works?
and will it work if i want to connect from Ubuntu to Fedora ?
I'm curious if anybody can shed some light for me in this department. We're in a large environment with a Windows DHCP Server. We have been tinkering with LTSP on Edubuntu as thin and fat clients. It works great, but right now we just have 1 server handling the lab, which works fine unless we want to expand, which may be very possible.
These are the instructions I received:
Login to your windows server and load the DHCP configuration screen
Create a DHCP reservation for the MAC address you obtained
Add the configuration options below to enable the machine to boot from the LTSP server
017 Root Path: /opt/ltsp/i386
066 Boot Server Host Name: <ip address>
067 Bootfile Name: ltsp/arch/pxelinux.0 # Specify CPU architecture in place of 'arch', for instance 'i386'
From: [url]
I'm curious, what if I want to have multiple Ubuntu servers on the network that I want to have bootable? For example, let's say I have 3 labs, and 3 servers. Server A to Lab A, Server B to Lab B, and Server C to Lab C. I want all C's computers to boot to C, and B to B, A to A, etc.
1 - How would I add multiple entries on the Windows DHCP Server to allow all 3 (A B C) servers to boot?
2 - How would I be able to isolate the clients so ONLY Lab A clients boot to Server A, etc?
I am looking for a version of vmware that manages 2 severs at the same time and that mirrors them such that if one goes down we can still work on the second and of course it also works as a backup. Also, must work on a ubuntu server I have looked but there are so many version that I don't know which one is the best.
View 1 Replies View Related(Mods: If you feel this belongs more in the Games or Wine discussion area, please feel free to move. This question does intersect many areas, so was unsure where to put)
I have a funky server Ubuntu 9.10 Enterprise setup where I have X on all the time (using Xfce4 - not Xbuntu) with latest wine so I can run Windows only based game server executables. One of the applications is a simple dedicated racing game server made by the company I work for that works perfect in wine (unfortunately, the full 3D game client does not, so its a windows only game). The other is more just to test, runs Serious Sam HD dedicated with wine with a steam client active in background since SSHD Ded requires a steam client logged in (just create a dummy account).
Im getting some lag issues with the SSHD on the end-users client side. Unsure if its related to it being a more complex game and using wine to translate slowing it down. Things like tiny warps once in awhile, and the ping of clients kinda jumping around.
Im pretty sure my network settings are ok. Maybe not fully optimized for every bit via ipv4. Still though. This 1U Opteron server is in a ISP with a full 1000 up and down. Ports are locked out that aren't being used. I do have apache going, but its nothing strenuous. The CPU isnt used overly so. Maybe peaks out around 60% under strain, but mostly 20-40%. Memory use is about 550-700megs for SSHD itself. Given, it only has 2 gigs total at this time, but I still usually have near a Gig of memory available at most times.
I admit newbness of linux servers in general. Was reading about other game servers like CS:S requiring a ticked kernel near 1000 to get the least amount of lag. Some even saying they dropped the tickless options of the newer 2.6 kernels on purpose because they produced lag. Was checking on the history of newer Windows Server like 2008 and they still use a ticked OS, though a more optimized version.
So this boils down to should I be running a Ticked OS kernel to run a more complex Windows based dedicated server? I haven't tried thus far, well because I am again a bit of a n00b to all this. That and I'm not sure you have to tell wine or the SS:HD dedicated exe itself to run at a full ticked rate (no option I have seen for a command line function in the SS:HD itself).
I have Webmin installed on an Ubuntu server. I currently have a successful apache server running on port 80, however I want to create a virtual host on port 81. When I try I go to servers->Apache Webserver-> Create Virtual Host I change the port to 81 and the document root to /var/port81www then I click create. How ever when I goto 192.168.1.5:81 (local ip, I know I have to port forward but its not even working local) it does not work.
View 5 Replies View RelatedI handle several hundreds of domains. Mails are handled with google apps (but previously I used to have a full postfix/courrier setup with virtualhosting). Now what I need is to be able to send mail (newsletter etc...) from my web servers, but I don't need to receive mail on these servers.
View 4 Replies View RelatedI got my hands on a couple old servers. An HP tc2021 and a Proliant ML110. Sure they're ancient, but I thought they would make a couple of great Ubuntu Servers for a new "start up" business I'm trying out. Now I've got to decide the best scenario to distribute the load between the two servers. I'm going to make an internal domain and will probably be running the following: Kerberos, Samba, Apache, Postfix, mysql, bind, dhcp, SVN, GCC, and Nagios. So in summary, I'll have the following roles; domain controller, web server, file server, and network monitoring services. how they would handle splitting these services up between two servers?
View 1 Replies View RelatedI am running apache2 and tornado web servers on the same server with one ip address.
The apache2 listens on port 80. Tornado listens on port 8888. I want to redirect requests from a specific ip port 80 to port 8888. I don't have the ability to change the port request on the device. It wants is looking for a web server on port 80.
Any other web server request should go to the apache.
I tried adding the following to /etc/ufw/before.rules
When I run iptables -L it doesn't appear. I have disabled and enabled ufw with no help.
Now that I have more computers I am looking at new solutions to manage the proliferation.My Linux machine has been replaced and its now much more powerful than before but its still a 32-bit processor. No problem as I am not using anything unorthodox outside the LAMP stack with a few PHP add-ons to support graphics.I use SAMBA so I can edit web sites easily with Windows tools.So now given a Windows Server, who should be king server and have everybody on the same page so to speak.
View 7 Replies View RelatedI own a rather large website/forum devoted to Scuba utilizing vBulletin. The problem is that its become INCREDIBLY slow as of late. I have three Ubuntu web servers under a single Ubuntu load balancer and they draw from a CentOS 5 DB server running MYSQL. Here are my concerns:
-I am thinking that they are all 32 bit rather than 64 bit.
-I am thinking that the problem is an IO issue.
I'm trying to build a Fedora 12 cluster to run DHCP on top of two servers using pacemaker and drbd. The pacemaker runs great but i'm having the hardest time getting DRBD installed.
My kernel version is 2.6.32.11-99.fc12.i686.PAE First i tried to [root@dhcp-primary drbd]#yum install drbd this doesn't give me everything because apparently the kernel module for DRBD must be built from source. so i unpacked drbd-8.3.6.tar.gz and tried :
[Code]...
I'm not very experienced in compiling from source i'd love to make an rpm for this but after scouring the web and trying different install methods, I am still at a loss.
I currently have a group of 3 servers connected to a local network. One is a web server, one is a mysql server, the other used for a specific function on my site (calculation of soccer matches!).
Anyway, I have been working on the site a lot lately but it is tedious connecting my USB hard drive to each computer and copying the files. This means I am not backing up as often as I should...
I have a laptop connected to this same network that I use for development so I can SSH into to the computers, is there any software for ubuntu that can take backups of files that I choose on multiple computers? I know I could rsync but is there something with more or an GUI?
Then I can just every 2 days move the most recent backup from my laptop to the USB drive. Then I will have the backup stored in 2 places if things go kaboom somewhere.
I'm running Ubuntu Server 10.04 and have a secure (SSL/TLS) FTP server on it. However, I'd like to use this FTP server to update programs I made using Microsoft Visual Studio. Unfortunately, in Microsoft's infinite wisdom, secure FTP servers cannot be used. Rather than use an insecure FTP server, I want to set up my secure FTP server to be able to access whatever I need to on the machine, and then add an insecure FTP server that only has access to the directory where I put my update files. I am currently using vsftpd as my FTP server. Is there any way that I can set up two FTP servers on this single machine?
View 6 Replies View RelatedI wonder if other people have this problem. sometimes I need to duplicate most or all of a server from one machine to another. part where I most tend to have issues is with recreating the users. Sometimes the UIDs don't match up because of differences between the two systems, which gives funky results, like files owned by the wrong user.
Or, sometimes, I just need to create the same 10 users on x number of machines, and it's tedious to do this 10x times. Plus, then, if you need to change a password or delete a user, you have to do it x times.Any recommendations on how to centralize users/auth?
I'm going to be setting up a couple of servers for some friends. I'd like them to be able to email me some information after they do some maintenance scripts via cron. I got my own server to send email using a tutorial I found but that involved using my personal gmail account. getting email sending working on ubuntu server with minimal fuss and account credential exposure?
View 2 Replies View RelatedRemoved the thread; figured out that this does work in the zones config:
<Record you want redirected to another nameserver><tab>IN<tab>NS<tab><name server to redirect the query to>
Ive been asked by my boss to set up a ubuntu machine that will be used as a syslog server. He wants a GUI as a posed to a CLI. He would also perfer to have it non web based. We already have cati installed but he is not keen on the syslog side of that. Does anyone know of any other syslog programs?
View 1 Replies View RelatedIs it possible to run two servers through one ip address? And I don't mean through apache to run virtual servers. Right now my set up is: Cable modem>router>server.
View 9 Replies View RelatedI have the system setup and working, but I want to put it in a corner and forget about it. Problem is, nothing starts running unless I'm logged in. And if I log out, everything stops again.It's running a LAMP server and has VNC and SSH servers as well. I want all of that to start without having to log in. That way I can remote reboot without worries and connect and login with either VNC or SSH.Everything seems to have an entry in /etc/init.dIs the way it's acting normal behavior? It's a fresh install, then I installed everything I needed from the repos.
View 7 Replies View RelatedI wanted to create a name server for my website. so I did changed /resolv.conf , $
/nameserverips
like this =>
cat /etc/resolv.conf
[code]....
Being on a low budget and I can't afford to buy Redhat would you recommend using Fedora for setting up dedicated servers? I know Fedora is known to be "bleeding edge" in technology, which concerns me with the stability of the server. Would you recommend a more stable Linux distro? I was also wondering if there is any way to know what these web hosting companies are using in their servers: [url]
View 9 Replies View RelatedProblem with my Internet connection. I can't connect to the update servers. I don't know why. It's a brand new installation, not a week old yet. I can't install the support for restricted media for example. The servers won't refresh in YaST. It tells me it can't download the repomd.xml.asc.
The other problem is that some servers on the web won't load for me either.
For example, I get most of my local news from The Toronto Star, and I can't connect to it's website at all.
I can from Windows (I dual boot) but not SUSE. I don't think its a problem limited to that one website either. I am able to connect to most websites though.
This is the result of zypper repos -d
Code:
I setup an rsync in cron to sync a master server with a backup server. however not everything gets copied over or removed. I believe this to be a permissions issue on the backup server. I am using a user we created specifically for this, and the rsync is setup to preserve permissions and delete files that have been deleted on the master..
Here is the rsync command:
59 11,23 * * * rsync -avP --delete -e "ssh -pPort" /media/_Files user@ip address:/media >> /home/user/sync.log
Of course the ip address, user and port number is something else then above.. Is there a way to make the user that is initiating the sync into a superuser like root? That way everything on the backup server can be updated as necessary? I don't want to use root, Id like it to be a name I can keep relatively confidential.
my local server here is not reachable when I type on the hostname so I am wanting to know if I am on the machine via ssh (I have a monitor and keyboard plugged into the tower)
How do I figure out what the servers IP address is? I have ubuntu server 9.10 and I looked at the etc/host, etc/hostname files and they have the correct server hostname
Wish to periodically backup files from Ubuntu Server 10.04 A to Ubuntu Server 10.04 B through FTP as a CRON job.
View 3 Replies View RelatedI have tried both Vino (built-in GNOME VNC) and x11vnc and both of them have the same result:[URL]Does anyone know what causes this and how I can fix it?
View 10 Replies View RelatedIs it possible to run 2 web sites on the same server at the same time? I want to test MediaWiki on the box that currently hosts my MoinMoin web site but I don't want to disable MoinMoin.MoinMoin is public. MediaWiki would be accessed strictly from inside my home network. No public access.
View 14 Replies View RelatedI'm a Ubuntu Server beginner and I'm wondering if it is possible to have two web servers in one Ubuntu Server. E.g. [URL].... Can this be done on my Ubuntu Server 10.04? Does it involve Apache?
View 2 Replies View Related