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  • Clustering for Mere Mortals (Pt2)

    - by Geoff N. Hiten
    Planning. I could stop there and let that be the entirety post #2 in this series.  Planning is the single most important element in building a cluster and the Laptop Demo Cluster is no exception.  One of the more awkward parts of actually creating a cluster is coordinating information between Windows Clustering and SQL Clustering.  The dialog boxes show up hours apart, but still have to have matching and consistent information. Excel seems to be a good tool for tracking these settings.  My workbook has four pages: Systems, Storage, Network, and Service Accounts.  The systems page looks like this:   Name Role Software Location East Physical Cluster Node 1 Windows Server 2008 R2 Enterprise Laptop VM West Physical Cluster Node 2 Windows Server 2008 R2 Enterprise Laptop VM North Physical Cluster Node 3 (Future Reserved) Windows Server 2008 R2 Enterprise Laptop VM MicroCluster Cluster Management Interface N/A Laptop VM SQL01 High-Performance High-Security Instance SQL Server 2008 Enterprise Edition x64 SP1 Laptop VM SQL02 High-Performance Standard-Security Instance SQL Server 2008 Enterprise Edition x64 SP1 Laptop VM SQL03 Standard-Performance High-Security Instance SQL Server 2008 Enterprise Edition x64 SP1 Laptop VM Note that everything that has a computer name is listed here, whether physical or virtual. Storage looks like this: Storage Name Instance Purpose Volume Path Size (GB) LUN ID Speed Quorum MicroCluster Cluster Quorum Quorum Q: 2     SQL01Anchor SQL01 Instance Anchor SQL01Anchor L: 2     SQL02Anchor SQL02 Instance Anchor SQL02Anchor M: 2     SQL01Data1 SQL01 SQL Data SQL01Data1 L:\MountPoints\SQL01Data1 2     SQL02Data1 SQL02 SQL Data SQL02Data1 M:\MountPoints\SQL02Data1       Starting at the left is the name used in the storage array.  It is important to rename resources at each level, whether it is Storage, LUN, Volume, or disk folder.  Otherwise, troubleshooting things gets complex and difficult.  You want to be able to glance at a resource at any level and see where it comes from and what it is connected to. Networking is the same way:   System Network VLAN  IP Subnet Mask Gateway DNS1 DNS2 East Public Cluster1 10.97.230.x(DHCP) 255.255.255.0 10.97.230.1 10.97.230.1 10.97.230.1 East Heartbeat Cluster2   255.255.255.0       West Public Cluster1 10.97.230.x(DHCP) 255.255.255.0 10.97.230.1 10.97.230.1 10.97.230.1 West Heartbeat Cluster2   255.255.255.0       North Public Cluster1 10.97.230.x(DHCP) 255.255.255.0 10.97.230.1 10.97.230.1 10.97.230.1 North Heartbeat Cluster2   255.255.255.0       SQL01 Public Cluster1 10.97.230.x(DHCP) 255.255.255.0       SQL02 Public Cluster1 10.97.230.x(DHCP) 255.255.255.0       One hallmark of a poorly planned and implemented cluster is a bunch of "Local Network Connection #n" entries in the network settings page.  That lets me know that somebody didn't care about the long-term supportabaility of the cluster.  This can be critically important with Hyper-V Clusters and their high NIC counts.  Final page:   Instance Service Name Account Password Domain OU SQL01 SQL Server SVCSQL01 Baseline22 MicroAD Service Accounts SQL01 SQL Agent SVCSQL01 Baseline22 MicroAD Service Accounts SQL02 SQL Server SVC_SQL02 Baseline22 MicroAD Service Accounts SQL02 SQL Agent SVC_SQL02 Baseline22 MicroAD Service Accounts SQL03 (Future) SQL Server SVC_SQL03 Baseline22 MicroAD Service Accounts SQL03 (Future) SQL Agent SVC_SQL03 Baseline22 MicroAD Service Accounts             Installation Account           administrator            Yes.  I write down the account information.  I secure the file via NTFS, but I don't want to fumble around looking for passwords when it comes time to rebuild a node. Always fill out the workbook COMPLETELY before installing anything.  The whole point is to have everything you need at your fingertips before you begin.  The install experience is so much better and more productive with this information in place.

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  • Samsung Series 5 overheating

    - by Sean Brad
    I bought a Samsung Series 5 Ultra 2 weeks ago and installed Ubuntu 12.04 LTS. I am experiencing problems with overheating. When streaming, watching a movie or when having several programms/actions going on at the same time the CPU temperature rises to 95 degrees and the computer freezes. This happens sometimes when the computer is on battery and always when it is recharging. When I am using the computer on battery the CPU temperature is floating from around 75-95 degrees depending what it's doing. When the battery is recharging the CPU temperature is ranging from 88-95 degrees no matter what tasks it performs. Have anyone experienced this and how may the problem be solved? Best regards

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  • HDMI signal interrputs after 10 minutes plugged in a TV

    - by desert_unbound
    Ubuntu 11.10, Dell Inspiron N4050, VLC, Jupiter I'm trying to watch movies through HDMI output on a TV, with VLC, with the notebook unplugged from AC (but with enough battery for 2-3 hours of use), just with TV display (the notebook display stays off) And from 10 to 10 minutes, the TV turns black, and according to the TV, the HDMI cable is unplugged. But using the touchpad makes the screen appear again. In "screen" options, on system settings, i've set the screen to never turn off, and never reduce brightness using battery. In "power" settings, i've set to not suspend when using battery. In Jupiter, i've set (while trying to watch the movie) to work in maximum performance. I'm pretty sure it's not VLC, because i've set it to override power options and screensaver options (and also im not using xscreensaver). Also the movie continues, when the screen is black Maybe there's something that i'm missing? When i plug the HDMI in the notebook, i use jupiter to change the display (using the option "external display only")... maybe is that ?

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  • How to use only intel graphics and power off radeon?

    - by luizrogeriocn
    I've been using Linux for quite a while in everyday computing and programming. But now i got this new laptop with amazing battery life on windows which runs pretty cool even while gaming. But for some reason on Ubuntu I get like 1/3 battery life and it gets hot even while browsing the web. I have the proprietary drivers for radeon, but I'm thinking about upgrading from Ubuntu 12.04 to 14.04, and I would like to know how can I use only the Intel graphics and have radeon always turned off? Since I do not need the discrete graphics on Ubuntu and I'm pretty sure my problem is related to the radeon sucking up my battery and generating heat. My laptop technical specifications are: Dell latitude 3540 Intel core i7 4500U (with Intel hd4400 graphics ) Ati Radeon HD 8850m with 2GB GDDR5 VRAM 8 GB DDR3L @1600mhz Toshiba 256gb SSD Ubuntu 12.4.3 If you need any additional info, please tell me :)

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  • Plugged in, not charging Windows 7 solution

    I recently had the popular problem of Windows 7 battery manager malfunctioning and not charging my battery when plugged in.  The battery was fine, the power supply was fine, and the motherboard was fine (I have enough laptops with the same specs in the Headspring office, and I was able to swap out parts to isolate the problem). I also searched for this problem online, and many folks are having this problem with all makes of laptop computers.  I found the steps that solved my problem here...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • After power manager reinstall

    - by tuxi
    I had checking battery state hanging I solved it with the help of an answer from this site: sudo apt-get --reinstall install gnome-power-manager But now my left windows bar is rigid, it does not disappear on wide screen. EDIT Also in most of applications, characters are white. What could be the problem? and what should I do? 2ND EDIT My ubuntu is 12.04 LTS. I was trying to install some packages for dependencies of allegro game development library, one of the packages was libwxgtk2.8-0, after that a red cross appeared near user name and clock. Then computer became frozen and i had to remove my battery. I know it is a very bad thing. Then when i try to restart my computer, it could not start, it was waiting on black screen with line: Checking battery state... Then i run the above command. Computer could start but characters are white.

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  • SSH Connection Error : No route to host

    - by dewbot
    There are three machines in this scenario: Desktop A : [email protected] Laptop A : [email protected] Machine B : [email protected] All the machines have Ubuntu 11.04 (Desktop A is a 64bit one) and have both openssh-server and openssh-client. Now when I try to connect Desktop A to Laptop A or vice-versa by ssh [email protected] I get an error as port 22: No route to host in both the cases. I own both the machines, now if I try same commands from my friend's machine, i.e. via Desktop B, I can access both my Laptop and Desktop. But if I try to access Desktop B from my Laptop or by Desktop I get port 22: Connection timed out I even tried changing ssh port no. in ssh_config file but no success. Note: that 'Laptop A' uses WiFi connection while 'Machine A' uses Ethernet Connection and 'Machine B' is on an entirely different network. Laptop A && Desktop A - Router/Nano_Rcvr provided to me by ISP. So to one Router two Machines are connected and can be accessed at the same time. here is my ifconfig output for both the machines :- Laptop wlan0 Link encap:Ethernet HWaddr X:X:X:X:00:bc inet addr:1.23.73.111 Bcast:1.23.95.255 Mask:255.255.224.0 inet6 addr: fe80::219:e3ff:fe04:bc/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:108409 errors:0 dropped:0 overruns:0 frame:0 TX packets:82523 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:44974080 (44.9 MB) TX bytes:22973031 (22.9 MB) Desktop eth0 Link encap:Ethernet HWaddr X:X:X:X:c5:78 inet addr:1.23.68.209 Bcast:1.23.95.255 Mask:255.255.224.0 inet6 addr: fe80::227:eff:fe04:c578/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:10380 errors:0 dropped:0 overruns:0 frame:0 TX packets:4509 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1790366 (1.7 MB) TX bytes:852877 (852.8 KB) Interrupt:43 Base address:0x2000

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  • Matching up HomeGroup users created in different versions of Windows

    - by pdr
    In our household, we have 2 laptops and a desktop, all currently on Windows 8.1. The desktop has been upgraded in stages from Windows 7. Laptop 1 was bought with Windows 8 and has now been upgraded. Laptop 2 is new and came with Windows 8.1. We've been trying to set up a HomeGroup such that we have one user on laptop 1, one on laptop 2 and both can log into the desktop, with each user able to edit their files on their laptop and desktop, while the other user has read-only access. And we now have that situation ... except ... because the user on laptop 1 was created in Windows 8 but the same user on the desktop was created in 8.1, they have different names in Windows Explorer (say, firstuser and first_000). Likewise, the other use was created on laptop 2 in Windows 8.1 and on the desktop in Windows 7 (so let's say secon_000 and seconduser). This is ultimately confusing. Now if we expand the HomeGroup, we get four users (firstuser, first_000, seconduser and secon_000) and each has a single computer inside it. What I'd like to see is firstuser = laptop1, desktop and seconduser = laptop2, desktop. An acceptable alternative is first_000 = laptop1, desktop and secon_000 = laptop2, desktop. But what I don't want to have to do is delete firstuser and seconduser and rebuild them. Is there a better way?

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  • Domain joining debate for Outlook 2010 with Exchange 2007 on windows SBS 2008 for a user on a laptop that will travel a fair amount of the time.

    - by user71195
    I'm basically debating on whether or not to join the Domain on a Laptop, and was wondering if anyone has had a similar experience. If the computer were staying in the office, its a no brainer. Join the domain. In this case I have a user who will come into the office a few days a week, and work remotely the rest of the time. There is a working VPN using OpenVPN client/server, but it's not site-to-site. My knee jerk reaction is to not join the domain, so that the user can have 1 profile that they always use. In this configuration, should Outlook work properly with the user's domain account, and should the shared calendar still work (at least once inside the VPN)? My concern with joining the domain would be the inability to login to it when elsewhere. Is there maybe a way around this with caching or something? Would creating a second local login make sense for a user like this in any way? If so, why not just skip the domain join to begin with? Any thoughts on or experiences with this would be appreciated. Laptop OS Windows 7 (Not purchased yet.. pro if domain needed) Server SBS 2008, Exchange 2007 Outlook version 2010 Thanks for any help, Mike

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  • DB Design to store custom fields for a table

    - by Fazal
    Hi All, this question came up based on the responses I got for the question http://stackoverflow.com/questions/2785033/getting-wierd-issue-with-to-number-function-in-oracle As everyone suggested that storing Numeric values in VARCHAR2 columns is not a good practice (which I totally agree with), I am wondering about a basic Design choice our team has made and whether there are better way to design. Problem Statement : We Have many tables where we want to give certain number of custom fields. The number of required custom fields is known, but what kind of attribute is mapped to the column is available to the user E.g. I am putting down a hypothetical scenario below Say you have a laptop which stores 50 attribute values for every laptop record. Each laptop attributes are created by the some admin who creates the laptop. A user created a laptop product lets say lap1 with attributes String, String, numeric, numeric, String Second user created laptop lap2 with attributes String,numeric,String,String,numeric Currently there data in our design gets persisted as following Laptop Table Id Name field1 field2 field3 field4 field5 1 lap1 lappy lappy 12 13 lappy 2 lap2 lappy2 13 lappy2 lapp2 12 This example kind of simulates our requirement and our design Now here if somebody is lookinup records for lap2 table doing a comparison on field2, We need to apply TO_NUMBER. select * from laptop where name='lap2' and TO_NUMBER(field2) < 15 TO_NUMBER fails in some cases when query plan decides to first apply to_number instead of the other filter. QUESTION Is this a valid design? What are the other alternative ways to solve this problem One of our team mates suggested creating tables on the fly for such cases. Is that a good idea How do popular ORM tools give custom fields or flex fields handling? I hope I was able to make sense in the question. Sorry for such a long text.. This causes us to use TO_NUMBER when queryio

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  • Most secure way to access my home Linux server while I am on the road? Specialized solution wanted

    - by Ace Paus
    I think many people may be in my situation. I travel on business with a laptop. And I need secure access to files from the office (which in my case is my home). The short version of my question: How can I make SSH/SFTP really secure when only one person needs to connect to the server from one laptop? In this situation, what special steps would make it almost impossible for anyone else to get online access to the server? A lot more details: I use Ubuntu Linux on both my laptop (KDE) and my home/office server. Connectivity is not a problem. I can tether to my phone's connection if needed. I need access to a large number of files (around 300 GB). I don't need all of them at once, but I don't know in advance which files I might need. These files contain confidential client info and personal info such as credit card numbers, so they must be secure. Given this, I don't want store all these files on Dropbox or Amazon AWS, or similar. I couldn't justify that cost anyway (Dropbox don't even publish prices for plans above 100 GB, and security is a concern). However, I am willing to spend some money on a proper solution. A VPN service, for example, might be part of the solution? Or other commercial services? I've heard about PogoPlug, but I don't know if there is a similar service that might address my security concerns? I could copy all my files to my laptop because it has the space. But then I have to sync between my home computer and my laptop and I found in the past that I'm not very good about doing this. And if my laptop is lost or stolen, my data would be on it. The laptop drive is an SSD and encryption solutions for SSD drives are not good. Therefore, it seems best to keep all my data on my Linux file server (which is safe at home). Is that a reasonable conclusion, or is anything connected to the Internet such a risk that I should just copy the data to the laptop (and maybe replace the SSD with an HDD, which reduces battery life and performance)? I view the risks of losing a laptop to be higher. I am not an obvious hacking target online. My home broadband is cable Internet, and it seems very reliable. So I want to know the best (reasonable) way to securely access my data (from my laptop) while on the road. I only need to access it from this one computer, although I may connect from either my phone's 3G/4G or via WiFi or some client's broadband, etc. So I won't know in advance which IP address I'll have. I am leaning toward a solution based on SSH and SFTP (or similar). SSH/SFTP would provided about all the functionality I anticipate needing. I would like to use SFTP and Dolphin to browse and download files. I'll use SSH and the terminal for anything else. My Linux file server is set up with OpenSSH. I think I have SSH relatively secured. I'm using Denyhosts too. But I want to go several steps further. I want to get the chances that anyone can get into my server as close to zero as possible while still allowing me to get access from the road. I'm not a sysadmin or programmer or real "superuser". I have to spend most of my time doing other things. I've heard about "port knocking" but I have never used it and I don't know how to implement it (although I'm willing to learn). I have already read a number of articles with titles such as: Top 20 OpenSSH Server Best Security Practices 20 Linux Server Hardening Security Tips Debian Linux Stop SSH User Hacking / Cracking Attacks with DenyHosts Software more... I have not implemented every single thing I've read about. I probably can't do that. But maybe there is something even better I can do in my situation because I only need access from a single laptop. I'm just one user. My server does not need to be accessible to the general public. Given all these facts, I'm hoping I can get some suggestions here that are within my capability to implement and that leverage these facts to create a great deal better security than general purpose suggestions in the articles above.

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  • Get a user's current IP address from Skype

    - by Jonathan.
    This is assuming that you (/police/ISP) can get the [rough] location of a laptop based on IP address. If your laptop is stolen, and the thief unwittingly connects it to the Internet, and you have Skype on the laptop could you get the public IP address of the laptop and then go to the police and get it tracked? Or activate the webcam to see the surroundings, but without having Skype ring/notify the user?

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  • How do I allow remote access to mysql using xampp?

    - by sprugman
    I'm using xampp and navicat to manage mysql on two dev machines (laptop & desktop). The laptop is my main machine, while the desktop acts as a local dev server for the group. Connecting to mysql via localhost in navicat is working fine on the laptop. Is there a way (other than the http tunneling method) to allow access to the desktop from the laptop via navicat?

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  • I have too many DNS servers configured

    - by Jon Will
    I have my laptop connecting to my wireless router, and I have told the router to issue out DNS via the DHCP lease. The laptop is configured to use the information. The router is configured to only issue two DNS server addresses from open dns, but the laptop reports Networking Dns Servers: 10.197.100.1 10.197.100.2 10.197.100.3 8.8.8.8 8.8.4.4 208.67.222.222 208.67.220.220 I have no idea where the laptop is getting these additional IPs as DNS. Please advise.

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  • Can't connect to workgroup

    - by Bonyfus Martin
    I have two computers in my workgroup. My laptop has Windows 7 on it and desktop has Windows Server 2008 on it. I can ping and connect to the Windows Server 2008 from my laptop but I cannot ping or connect to my laptop from Windows Server 2008. Both computers are in the same workgroup, and their IP addresses use the same subnet mask. Does anyone know why I cannot connect to my laptop from the Windows Server 2008 machine?

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  • connecting to internet via PC (Ubuntu Linux) on mobile phone (sony ericsson)

    - by Michel
    I have a Toshiba laptop with wi-fi connected internet. Now I wanna connect my phone to my laptop and use its Internet connection ( I can't buy new wi-fi or 3g supported mobile phone ). I have no problem connecting k610 to my laptop, and even shared my GPRS internet connection with my PC. but can't do contrary. How can I connect my k610 mobile (which not support wi-fi connections) to Internet via my Toshiba laptop ( with bluetooth ) ? P.S: My PC OS is Ubuntu Linux 9.10

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  • Can I Exit my SSH Client After Starting an Update?

    - by NessDan
    I just ran sudo aptitude update && sudo aptitude dist-upgrade through PuTTY (SSH Client) on my Laptop, which was directed at my fresh Ubuntu server. Unfortunately I just realized I need to be out of the house with my Laptop and I'm worried that by exiting my SSH client or having my Laptop disconnect form the internet that the server won't continue updating! What will happen if I turn my Laptop off now that the server is updating?!

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  • After my laptop wakes up from sleeping/hibernating, the LCD/brightness is very low. How can I set it to default?

    - by meder
    In Power Management Preferences, On AC Power tab, I have brightness to 100%. "Dim display when idle" is not checked. I know for sure my LCD brightness is capable of going higher, because if I hit Fn and F7 then it resets the monitor brightness and settings for a few seconds, but the resolution breaks and then the brightness goes back. PS: OS is Debian Lenny ( I set the tags but for clarification ) and laptop is a Thinkpad.

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  • XAMPP Redirecting to XAMPP directory on Internal Network

    - by user302252
    I installed XAMPP on my desktop. I set up vhosts for about 5 sites and they are all working properly from the desktop itself. The problem arises whenever I try to access these vhosts from my laptop. I changed the hosts file on the laptop to redirect the laptop dev.domain.com requests to the desktop, however, when I try to access these sites from my laptop on the local network, I only receive the XAMPP welcome screen. It seems like when trying to access the vhosts on the desktop from the laptop the vhosts file is ignored as all requests are redirected to the xampp directory. What might I need to adjust to ensure access to the vhosts on the desktop from the laptop?

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  • Working with git from 2 laptops with no bare repo

    - by matiit
    I've started project in my first laptop. git init, and start working. Tomorrow i'm going to vacations. I want to take with me my smaller laptop. And work with project from time to time. I cloned repository via ssh from bigger laptop (git clone ssh://adress) And when i will back, what is the best way to push changes from smaller laptop to the bigger one? There is no bare repo in bigger laptop. And i want to work with that repo on the bigger laptop later, so i have to do this clear.

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  • Capturing network traffic on Linux

    - by Quandary
    Question: I have one Windows laptop, one Linux laptop and a wireless router. Now I want to "investigate" the hotmail/windows live protocol. What I want to do is route network traffic from the windows laptop via ethernet to the linux laptop, capture it on the Linux computer, forward it wirelessly to the router, receive the hotmail response from the router on the linux computer and forward it to the windows computer. How do I do that? In essence, switching the Linux laptop between the Windows laptop and the router, to capture network traffic ? Which program is best for capturing/analysing ? Please note that for whatever reason, packet capturing with winpcap on the windows computer doesn't work...

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  • C# - Erase all property values from a class?

    - by John M
    In a C# Winforms (3.5) application I have added a class that contains many properties (get/set) used to stored values from a 12 form long process. After form 12 I would like wipe out all the property values in the storing class so that the next user won't accidentally record values when starting the process at form 1. Is it possible to erase/destroy/dispose of all property values in a class? My class looks like this: private static int battery; public int Battery { get { return storeInspectionValues.battery; } set { storeInspectionValues.battery = value; } }

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  • Dell XPS + Apple Mini-Display Adaptor + Projector = KABOOM

    - by D'Arcy Lussier
    Remember how I blogged about rolling with the punches? So today my buddy and Prairie Dev Con speaker James Chambers went to present on Microsoft MVC. He brought his fancy new Dell XPS laptop, which he had used to do presentations and stream internet video to a projector before. But today, the technology gods were not smiling… James tries to connect his laptop to the projector. Nothing. The projector just can’t recognize the connection. Realize that we’ve already had two sessions in that room already, so everything *should* work. The Dell XPS laptop James has doesn’t have a VGA port. Instead, it has HDMI and Mini-Display ports. James had one of the Apple mini-display to VGA adapters. If I connected my Mac Book Pro, I could connect no problem, so it wasn’t the adapter. He could connect his laptop to projectors before, so it wasn’t the laptop. And we’d already had sessions, so it wasn’t the projector. So what was it? Well, all three it turns out. Thanks to this post over at Irongeek.com we discovered that using Windows 7 on a Dell XPS with the Apple connector and a non-plug-in-play projector won’t work. So the fix was ditch the Apple connector, use the Star Tech model instead (listed in the Irongeek article). So James is good to go, he’s going to talk at the last session and we’ve moved the Windows 8 talk Jim Russell and I were going to do until tomorrow. Roll with the punches…

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