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  • Java, the Cloud, and Oracle at QCon San Francisco 2011

    - by Bob Rhubart
    If you're part of the lucky bunch attending this week's sold-out QCon San Francisco conference at Westin San Francisco Market Street, I'd like to bring several sessions to your attention. On Wednesday Nov 16, Alex Buckley, specification lead for the Java Language and the Java Virtual Machine at Oracle, will present Java 7 and 8: Where We've Been, Where We're Going, part of the Why is Java still sexy? track. The session begins at 10:35 a.m. in the Olympic room. On Thursday Nov 17, Tyler Jewell, VP Product Management for Oracle's Platform as a Service, will participate in the Performance and Scalability Panel moderated by InfoQ founder and QCon SF Program Committee Member Floyd Marinescu. That panel, part of the Performance and Scalability Solutions track, begins at 10:35 a.m. in the Olympic room. Following that panel discussion, Tyler will fly solo with a presentation on Java EE 7: Developing for the Cloud, also part of the Performance and Scalability Solutions track. That session kicks off at 12:05 p.m., also in the Olympic room. On Friday Nov 18 Tyler will jump tracks, so to speak, when he presents The Architecture of Oracle's Public Cloud, part of the Architecture Case Studies: Cloud track. That session begins at 4:50 p.m. in the Stanford room. Of course, QCon also offers ample meet-and-greet opportunities. One such opportunity happens in the hospitality suite hosted by the Java Community Process Executive Committee. That shindig gets in gear at 5:50 pm on Thursday. Throughout the QCon San Francisco conference, members of the OTN team (including your's truly) and members of the Oracle Fusion Middleware team will be on hand at the OTN booth in the conference lobby. Stop by to say hello, score some swag, and catch a demo or two.

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  • Ubuntu eats itself after I followed updater instruction

    - by Tony Martin
    Updater (I assume) put a no entry style alert icon on the panel which informed me that certain package dependencies were not up to snuff. Upgrades were thereafter only partial. The dialogue advised that I (and this is from noob memory) sudo apt-get install -f. I did this and typed in the confirmation phrase and watched apt-get systematically remove every component of linux, both the stuff I installed and the core ubuntu packages. I could only assume at this stage that this was for a fresh install but of course, I know better now. There's much complaint about Windows, but I've never met with advice from Microsoft tools to wipe out the operating system because of a couple of missing .dlls. So what gives? This was a 64 bit install of 12.04. All that is left is grub pointing to a couple of windows recovery partitions on the hard drive. I'm tempted, but I have hopes of recovering the data that I had enough misguided faith to trust to the linux ext4 partition. I've tried pen driving back into it with a 32 bit iso but I'm simply informed that ubuntu is running in low graphics mode and get to watch the dots cycle indefinitely. EDIT: Thanks for the advice vis positive request. I've got onto the machine with a 64 bit stick and can see the file structure left behind by the installation. My first instinct was to run install from the stick but it did not seem to offer a recovery option. My question then: is there a way to recover the current installation so that if I reinstall the packages I had they will pick up the original settings. I'm particularly worried about losing email from evolution - the rest I could probably lash back together. I would also be interested how this disaster came about. I see people in the know recommending this same procedure in similar circumstances. Thanks for your attention, Tony Martin

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  • How to stop S.M.A.R.T check running for external hard drive

    - by gotqn
    I am using Windows 7 and I have enabled my "S.M.A.R.T" check, too. I have bought an external 1 TB USB hard drive. When it is connected with my computer, it delays my machine initial start with about 4-5 minutes. I was very confused at the begging, then disable the "S.M.A.R.T" check and see that the computer runs normally after restart. So, here is what I want to know: Why the check is turn for the external disk? Is there a way to use the "S.M.A.R.T" check only for my main hard drive? Why it takes 4 to 5 minutes more, as my both hard drives - internal/external are 1 TB?

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  • The Loneliest Road in America and the OTN Garage

    - by rickramsey
    Source I never told anyone how the image of the OTN Garage on Facebook came to be. I took the Facebook picture on Route 50 in Nevada, USA, in October of 2010. I was riding from Colorado to Oracle OpenWorld in San Francisco, so it was probably October. Route 50 is known as "The Loneliest Road in America." There are roads across Nevada that have even LESS traffic, but Route 50 still one. desolate. road. Although I have seen stranger things while riding along Nevada's Extraterrestrial Highway, I still run across notable oddities every time I ride Route 50. Like the old man with a bandolero of water bottles jogging along the side of the highway in the middle of the day, 50 miles from the closest town. First ultra-marathoner I'd seen in action. He waved at me. Or the dozen Corvettes with California license plates driving toward me, all doing the speed limit in the middle of nowhere because they were being tailed by half a dozen Nevada state troopers. #fail. I don't remember which town I was in, but I noticed the building when I stopped at the gas station. While standing there pouring fuel into the Harley, the store caught my eye. So I pulled the bike in front and walked inside. The owner is a little old lady, about 100 years old. Most of the goods she had on the shelves looked like they had been placed there during WWII. She was itty bitty and could barely see over the counter, but she was so happy when I bought a bar of Hershey's chocolate that she gave me a five cent discount. I took a few pictures and, when I got back, Kemer Thomson, who sometimes blogs here, photoshopped the OTN Garage and Oil Change signs onto it. The bike is a 2009 Road King Classic with a Bob Dron fairing and a Corbin heated seat. The seat came in handy when I rode home over Tioga Pass. The Road King is a very comfy touring bike with a great Harley rumble. I'm kinda sorry I sold it. When I stopped for fuel about 75 miles down the road at the next town, I peeled back the chocolate bar. I had turned into powder. Probably 50 years ago. - Rick Website Newsletter Facebook Twitter

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  • How do I know which hardware components are compatible when building a computer?

    - by darkie15
    I am trying to setup my own new computer. I haven't done this before and hence needed guidance from all here. I can google out the results for steps to follow for setting up my machine, but I do not understand what components are compatible with each other? For example there must be specific models of motherboard that are compatible with Intel Core i5-2500K Sandy Bridge 3.3GHz. In general, if there is a website that can guide me on all compatible components, that would be great. If not, how would I be able to check compatibility?

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  • Disk Redundancy across different server

    - by Mascarpone
    I have 3 servers, all with the same specs: Intel CPU 8 GB RAM Linux or BSD Single 2TB desktop SATA with more than 10K Hours of operation, with only less than 300 GB Used My provider cannot install a second hard drive, but can guarantee me that the drive will be replaced immediately in case of failure, with another equally crappy drive. The likelihood of drive failure is high, and since I can't use RAID, I was thinking about keeping a back up of each machine on all the other machines, so that there are always 2 copies on 2 different drives, plus the original. I would synchronize the drives every hour, with rsync, to guarantee some sort of redundancy, since bandwidth inside the DC is free, so it would be much cheaper than offsite backup. (A daily offiste backup is kept anyhow). What do you think? Any suggestion?

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  • ifconfig return "unknown interface: no such device"

    - by xolstice
    I'm trying to install a Linux driver for my wireless network card (D-Link DWL-G510) on my Red Hat Linux 7.1 machine with a 2.4.37.9 kernel. I downloaded the serial monkey driver from the sourceforge site and was able to successfully compile the rt73 module and load it into the kernel. The problem now is that everytime I issue the command ifconfig wlan0 up it keeps returning with the following error message: wlan0: unknown interface: No such device. I'm at a loss as to what to do here. I specifed wlan0 as the alias for the rt73 module in the modules.conf and also tried to load the driver with the command modprobe rt73 ifname=wlan0 (this specifies the interface name according to the instructions packaged in the driver), but the error message still keeps coming up. Is there something else I need to do in Linux to configure the wlan0 part or is the module not recognizing the wireless network card? It would be quite strange if it is the later since all information from the Internet is indicating this is the linux driver I should be using for mentioned wireless card.

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  • Openfire Installation Issue - Can't Login to admin panel

    - by Lobe
    I am trying to get Openfire to install on an Ubuntu virtual machine, however upon completing the web based installer, I am unable to login to the admin panel. So far I: downloaded debian installer Installed using stock options Added database and built the structure using supplied sql file Completed web based installer I am now trying to login using username: admin and my password, however I constantly get a wrong username/password error. There is a record generated in the MySQL DB showing the admin user with an encrypted password, and changing to an unencoded password doesn't work. Can anyone help pinpoint the problem here? Thanks

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  • not find 127.0.0.1 or vhost with localhost apache in mac

    - by Charly Palencia
    i was working with localhost:81 during a long time with vhost and all was rigth. BUT, right now i need to work over the 80 port and i change the http.conf and http-vhost for used the 80 port but right now into the browser localhost works ok, 127.0.0.1 and the vhost not find the server. my configurations are: * My local machine is lion osx * mamp * HTTP.conf: ServerName localhost:80 * http-vhost NameVirtualHost localhost <VirtualHost localhost> DocumentRoot "/Users/chalien/projects/ownProjects/PHP" ServerName example.dev </VirtualHost> * /private/etc/hosts 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost 127.0.0.1 example.dev * /private/etc/services http 80/udp www www-http # World Wide Web HTTP http 80/tcp www www-http # World Wide Web HTTP

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  • Is it possible to show " New Task" of Task Manager from tasks of Task Manager only?

    - by WebMAOhist
    I work on remote Windows Server 2008 machine over RDP and frequently need to revive broken copy&pasting over RDP. Which is killing rdpclip process in Task Manger (tab "Processes") and launching it gain by: switching to tab Applications -- pressing button "New Task..." -- typing 'rdpclip'-- clicking OK. Well, I do not need to type 'rdpclip' if it is the last used command. The problem that in "Create New Task" of Windows Task Manager I always launch rdpclip only but it shows the last run program from Windows command prompt (Win +R), usually it is "notepad" for me. Is it possible to bind the last used command/task to Task Manager only? and how?

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  • Cannot boot from USB on my Mac mini

    - by Thai Tran
    Two weeks ago I installed OSX 10.8 on my Mac mini. After that, my system started to hang a lot, so I tried to erase it and install OSX 10.7 again. I used carbon Copy Cloner to make the bootable USB and it can load successfully on another Macbook. However, on my Mac mini, when I press on the option button to select the USB, it loads the white screen with a ban symbol at the center of the screen. After a moment, my machine automatically shuts down. Does anyone know how to solve this problem? Edit: this is exactly the problem I have now http://forums.macrumors.com/archive/index.php/t-1207168.html Update 1: the hdd seems ok (from disk utility). I restored the booting partition by disk utility (drag the dmg file to that partition). After restarting and using that partition to boot, prohibited symbol is still there

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  • Can't connect to a share.

    - by AngryHacker
    Hello, I have a laptop with a Windows XP Tablet Edition installed. I have several users setup on the laptop (mostly me and my kids). When I try to connect to its administrative share via \DadLaptop\c$ from a Windows 2000 Professional machine, it prompts me for a user name and password. However, after I enter it, it always tells me "incorrect password or unknown username". As a test I setup another share, called "test" and tried to connect to that. It worked fine, didn't even ask me for a password, just connected to it and that's that. All the networking is wireless. I am connecting with an admin account (admin on the target computer). What am I missing? Why can't I connect to an administrative share?

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  • Package system broken - E: Sub-process /usr/bin/dpkg returned an error code (1)

    - by delha
    After installing some packages and libraries I have an error on Package Manager, I can't run any update because it says: "The package system is broken If you are using third party repositories then disable them, since they are a common source of problems. Now run the following command in a terminal: apt-get install -f " I've tried to do what it says and it returns me: jara@jara-Aspire-5738:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following packages were automatically installed and are no longer required: libcaca-dev libopencv2.3-bin nite-dev python-bluez ps-engine libslang2-dev python-sphinx ros-electric-geometry-tutorials ros-electric-geometry-visualization python-matplotlib libzzip-dev ros-electric-orocos-kinematics-dynamics ros-electric-physics-ode libbluetooth-dev libaudiofile-dev libassimp2 libnetpbm10-dev ros-electric-laser-pipeline python-epydoc ros-electric-geometry-experimental libasound2-dev evtest python-matplotlib-data libyaml-dev ros-electric-bullet ros-electric-executive-smach ros-electric-documentation libgl2ps0 libncurses5-dev ros-electric-robot-model texlive-fonts-recommended python-lxml libwxgtk2.8-dev daemontools libxxf86vm-dev libqhull-dev libavahi-client-dev ros-electric-geometry libgl2ps-dev libcurl4-openssl-dev assimp-dev libusb-1.0-0-dev libopencv2.3 ros-electric-diagnostics-monitors libsdl1.2-dev libjs-underscore libsdl-image1.2 tipa libusb-dev libtinfo-dev python-tz python-sip libfltk1.1 libesd0 libfreeimage-dev ros-electric-visualization x11proto-xf86vidmode-dev python-docutils libvtk5.6 ros-electric-assimp x11proto-scrnsaver-dev libnetcdf-dev libidn11-dev libeigen3-dev joystick libhdf5-serial-1.8.4 ros-electric-joystick-drivers texlive-fonts-recommended-doc esound-common libesd0-dev tcl8.5-dev ros-electric-multimaster-experimental ros-electric-rx libaudio-dev ros-electric-ros-tutorials libwxbase2.8-dev ros-electric-visualization-common python-sip-dev ros-electric-visualization-tutorials libfltk1.1-dev libpulse-dev libnetpbm10 python-markupsafe openni-dev tk8.5-dev wx2.8-headers freeglut3-dev libavahi-common-dev python-roman python-jinja2 ros-electric-robot-model-visualization libxss-dev libqhull5 libaa1-dev ros-electric-eigen freeglut3 ros-electric-executive-smach-visualization ros-electric-common-tutorials ros-electric-robot-model-tutorials libnetcdf6 libjs-sphinxdoc python-pyparsing libaudiofile0 Use 'apt-get autoremove' to remove them. The following extra packages will be installed: libcv-dev The following NEW packages will be installed libcv-dev 0 upgraded, 1 newly installed, 0 to remove and 4 not upgraded. 2 not fully installed or removed. Need to get 0 B/3,114 kB of archives. After this operation, 11.1 MB of additional disk space will be used. Do you want to continue [Y/n]? y (Reading database ... 261801 files and directories currently installed.) Unpacking libcv-dev (from .../libcv-dev_2.1.0-7build1_amd64.deb) ... dpkg: error processing /var/cache/apt/archives/libcv-dev_2.1.0-7build1_amd64.deb (-- unpack): trying to overwrite '/usr/bin/opencv_haartraining', which is also in package libopencv2.3-bin 2.3.1+svn6514+branch23-12~oneiric dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/libcv-dev_2.1.0-7build1_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) I've tried everything people recommend on internet like: sudo apt-get clean sudo apt-get autoremove sudo apt-get update sudo apt-get upgrade sudo apt-get -f install Also I've tried to install the synaptic manager but it doesn't let me install anything.. As you can see nothing works so I'm desperate! I'm using ubuntu 11.10, 64 bits Thanks!!

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  • Writing a "Hello World" Device Driver for kernel 2.6 using Eclipse

    - by Isaac
    Goal I am trying to write a simple device driver on Ubuntu. I want to do this using Eclipse (or a better IDE that is suitable for driver programming). Here is the code: #include <linux/module.h> static int __init hello_world( void ) { printk( "hello world!\n" ); return 0; } static void __exit goodbye_world( void ) { printk( "goodbye world!\n" ); } module_init( hello_world ); module_exit( goodbye_world ); My effort After some research, I decided to use Eclipse CTD for developing the driver (while I am still not sure if it supports multi-threading debugging tools). So I: Installed Ubuntu 11.04 desktop x86 on a VMWare virtual machine, Installed eclipse-cdt and linux-headers-2.6.38-8 using Synaptic Package Manager, Created a C Project named TestDriver1 and copy-pasted above code to it, Changed the default build command, make, to the following customized build command: make -C /lib/modules/2.6.38-8-generic/build M=/home/isaac/workspace/TestDriver1 The problem I get an error when I try to build this project using eclipse. Here is the log for the build: **** Build of configuration Debug for project TestDriver1 **** make -C /lib/modules/2.6.38-8-generic/build M=/home/isaac/workspace/TestDriver1 all make: Entering directory '/usr/src/linux-headers-2.6.38-8-generic' make: *** No rule to make target vmlinux', needed byall'. Stop. make: Leaving directory '/usr/src/linux-headers-2.6.38-8-generic' Interestingly, I get no error when I use shell instead of eclipse to build this project. To use shell, I just create a Makefile containing obj-m += TestDriver1.o and use the above make command to build. So, something must be wrong with the eclipse Makefile. Maybe it is looking for the vmlinux architecture (?) or something while current architecture is x86. Maybe it's because of VMWare? As I understood, eclipse creates the makefiles automatically and modifying it manually would cause errors in the future OR make managing makefile difficult. So, how can I compile this project on eclipse?

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  • Media Temple-like hosting services?

    - by antonpug
    I have a couple of wordpress sites which do not get much traffic now, but I plan on expanding to something like a 1000-2000visits/day in a year or two. Media Temple has some really nice offerings, but their Wordpress plan is 20/month...which is a little too much, seeing as at this point my site is more of a hobby than a money making machine. I currently host with HostGator (just switched from GodaddyiPageBluehost). All these cheaper/pop hosting services are okay, but it would be nice to find something a little bit more "premium", but at a lower cost than MT. Anyone know anything worth looking at?

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  • Limiting Sybase ASE 15 CPU usage on VM

    - by reiniero
    I've set up a single CPU Sybase ASE 15.7 test/hobby/experimentation system on a Debian Squeeze x64 KVM VM. I notice the CPU load goes to 100% and stays there. Definitely not a Sybase guru, only interested to see if some programs I'm running work on the database. Looking at Sybase docs it seems ASE detects the machine is idle and then takes over all processing just waiting for a connection (and if needed, doing some housekeeping apparently). Normally that would be fine but as it is running in a VM it's taking away processor resources other VMs could use - and the increased fan noise of the PC near my desk annoy me. I've tried to remedy this: set the "runnable process search count" parameter from DEFAULT (2000 IRC) to 3 in /opt/sybase/ASE-15_0/SYBASE.cfg from http://sybase.reygrobellet.com/tutorials/install_sybase_vb/standalone04_configure_oralin11#TOC-Configure-kernel I added this to my /etc/init.d/sybase startup script: echo 0 /proc/sys/kernel/randomize_va_space (though I don't think it'll make much difference) How can I tell Sybase to "behave" and not hog the processor - I don't mind reduced performance.

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  • grep pattern interpretted differently in 2 different systems with same grep version

    - by Lance Woodson
    We manufacture a linux appliance for data centers, and all are running fedora installed from the same kickstart process. There are different hardware versions, some with IDE hard drives and some SCSI, so the filesystems may be at /dev/sdaN or /dev/hdaN. We have a web interface into these appliances that show disk usage, which is generated using "df | grep /dev/*da". This generally works for both hardware versions, giving an output like follows: /dev/sda2 5952284 3507816 2137228 63% / /dev/sda5 67670876 9128796 55049152 15% /data /dev/sda1 101086 11976 83891 13% /boot However, for one machine, we get the following result from that command: Binary file /dev/sda matches It seems that its grepping files matching /dev/*da for an unknown pattern for some reason, only on this box that is seemingly identical in grep version, packages, kernel, and hardware. I switched the grep pattern to be "/dev/.da" and everything works as expected on this troublesome box, but I hate not knowing why this is happening. Anyone have any ideas? Or perhaps some other tests to try?

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  • ssl between balancer members?

    - by jemminger
    I have apache running on one machine as a load balancer: <VirtualHost *:443> ServerName ssl.example.com DocumentRoot /home/example/public SSLEngine on SSLCertificateFile /etc/pki/tls/certs/example.crt SSLCertificateKeyFile /etc/pki/tls/private/example.key <Proxy balancer://myappcluster> BalancerMember http://app1.example.com:12345 route=app1 BalancerMember http://app2.example.com:12345 route=app2 </Proxy> ProxyPass / balancer://myappcluster/ stickysession=_myapp_session ProxyPassReverse / balancer://myappcluster/ </VirtualHost> Note that the balancer takes requests under SSL port 443, but then communicates to the balancer members on a non-ssl port. Is it possible to have the forwarding to the balancer members be under SSL too? If so, is this the best/recommended way? If so, do I have to have another SSL cert for each balancer member? Does the SSLProxyEngine directive have anything to do with this?

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  • Apache error "No address associated with hostname" on Arch Linux (ZMLarch)

    - by Eedoh
    I'm trying to set up video surveillance system using IP cameras and ZoneAlarm on Arch Linux. I set up fixed IP address, I've managed to get streams from cameras, etc. However, after restart of the machine, I cannot start Apache again. I checked configuration of rc.conf, and saw that static IP configuration has been deleted, and also secondary nameserver in resolv.conf. Tried to re-write these with correct parameters, but now with no effect. This is tail of my /var/log/httpd/error_log file, after /etc/rc.d/httpd restart attempt [Fri Jan 29 04:20:45 2010] [alert] (EAI 5) No address associated with hostname: mod_unique_id: unable to find IPv4 address of "zmhost" Configuration failed Anybody have an idea on how could I fix this?

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  • Lack of Virtual Memory - confusion

    - by Wesley
    Specs ahead of time: AMD Athlon XP 2400+ @ 2.00 GHz / 1 GB PC-3200 DDR RAM / 160 GB IDE HDD / 128 MB GeForce 6200 AGP / FIC AM37 / 350W PSU / Windows XP Pro SP3 So, XP has pop-ups saying that I am low on virtual memory. However, I have a program called SmartRAM (part of Advanced SystemCare by IObit) and it displays CPU & Page File Usage and Free Physical and Virtual Memory. That program shows that I have at least 2000 MB free virtual memory on my machine when the XP pop-ups say that I'm low on virtual memory. First off, would a complete lack of virtual memory cause my computer to freeze? Secondly, how can I solve this lack of virtual memory? (A complete reformat is possible but can't be done immediately...) Thanks in advance.

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  • links for 2010-05-19

    - by Bob Rhubart
    Presentations from #otnarchday in Dallas now available on Slideshare Includes presentations on IT Optimization, Application Integration Architecture, Application Grid, and Infrastructure Consolidation. More to come. Anthony Shorten: JMX Based Monitoring - Part Four - Business App Server Monitoring Anthony Shorten discuss a new Oracle Utilities Application Framework V4 feature that allows JMX to be used for management and monitoring the Oracle Utilities business application server component. (tags: oracle otn java architect) New book: Oracle Coherence 3.5 An overview of the new book by authors Aleksandar Seovic, Mark Falco, Patrick Peralta. (tags: oracle otn grid architect) Douwe Pieter van den Bos: Next step in Virtualization: VirtualBox 3.2 "For businesses, VirtualBox just might be the answer they where looking for," says Douwe Pieter van den Bos. "A simple and widely supported virtual machine." (tags: oracle otn virtualization architect) Maurice Gamanho: Python and Ruby in Tuxedo Maurice Gamanho's quick overview of new features in Oracle's Service Architecture Leveraging Tuxedo (SALT) 11gR1. (tags: oracle otn soa architect) Live Webcast: Oracle and AmberPoint - May 20, 2010 - 10 a.m. PT/1 p.m. ET Ed Horst and Ashish Mohindroo discuss the advantages of the Oracle and AmberPoint combination. (tags: oracle otn architect soa governance)

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  • Parse HTTP requests through Wireshark?

    - by diogobaeder
    Hi, guys, Is there any way to parse HTTP request data in wireshark? For example, can I expose the request parameters upon an HTTP GET request (being sent by my machine), so that I don't need to read the (sometimes) truncated URL and find them by myself? I was using Tamper Data and Firebug, on my Firefox, to analyse these requests, but they're not as reliable as a stand-alone tool for monitoring my network interface, but wireshark keeps data too raw concerning HTTP flow. If you guys know any other stand-alone tool that does this (must be Linux-compatible), please tell me. Thanks!

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  • Suse 12.3 cannot boot after a forced shutdown

    - by David Dai
    I was doing a system update using zypper update After a while the screen was filled with this message failed to start system logging service. and the system was not responding. I had to shutdown it by holding the power button. then I started the machine again, and selected to boot suse. Then I saw the fancy boot animation(some shiny big dots gathering to the center of the screen), then the screen just turned black and the monitor sayed "no signal". then I tried to boot into suse failsafe mode, which was fine. how can I investigate into this problem?

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  • How do I make complex SQL queries easier to write?

    - by DragonLord
    I'm finding it very difficult to write complex SQL queries involving joins across many (at least 3-4) tables and involving several nested conditions. The queries I'm being asked to write are easily described by a few sentences, but can require a deceptive amount of code to complete. I'm finding myself often using temporary views to write these queries, which seem like a bit of a crutch. What tips can you provide that I can use to make these complex queries easier? More specifically, how do I break these queries down into the steps I need to use to actually write the SQL code? Note that I'm the SQL I'm being asked to write is part of homework assignments for a database course, so I don't want software that will do the work for me. I want to actually understand the code I'm writing. More technical details: The database is hosted on a PostgreSQL server running on the local machine. The database is very small: there are no more than seven tables and the largest table has less than about 50 rows. The SQL queries are being passed unchanged to the server, via LibreOffice Base.

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  • Insulate hosted client domains from server IP address change?

    - by babtek
    I will be hosting web content for many client domains on a single IP address (with a web hosting company, not inhouse machine). Initially, I must give client some information to configure their registrar to point the domain to my server. I want client domains insulated from a potential IP address change, so if I change hosts/IP address they don't have to reconfigure anything with their registrar. Is this reasonably possible without running my own nameserver? If so, what would be the smartest way to make it happen? Instruct clients to make CNAME record? Use some type of DNS management service that clients would use as a nameserver?

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