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• Using the fsc mount option with nfsroot kernel parameter to allow FS-cache

  - by meanderix

  I'm PXE-booting a Ubuntu 10.10 system, where I specify the kernel parameters as follows: append root=/dev/nfs initrd=ubuntu-boot/initrd.img-2.6.35-24-generic nfsroot=11.22.33.44:/data/nfsroot,fsc ip=dhcp rw I need to use the mount option 'fsc' in order to use FS-cache functionality (the cachefilesd package.) However, when I try this I get the following error upon boot: nfsmount: bad option 'fsc' Why doesn't nfsmount permit this option? (It works fine when you mount manually with "mount -o fsc" after booting up.)

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• tomcat behind apache

  - by dannynjust

  i am trying to use the mod_proxy_ajp to forward all the request from tocat.example.com to example.com:8080 here is what the tomcat server.xml looks like: <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> and here is the apache.conf config: <VirtualHost *:80> ServerName tomcat.example.com ServerAdmin [email protected] ErrorLog logs/tomcat.example.com-error_log CustomLog logs/tomcat.example.com-access_log common <Proxy *> AddDefaultCharset Off Order deny,allow Allow from all </Proxy> ProxyPass / ajp://example:8009/ ProxyPassReverse / ajp://example:8009/ </VirtualHost> but it is not working, any idea?

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• B2B 11.1.1.2 no proxy support for FTP

  - by nestor.reyes

  Have you seen this error while trying to use a proxy for a delivery channel within B2B?Transport error: Proxy type must be defined when Proxy host has been specified. Proxy type must be defined when Proxy host has been specified.If so, you are not alone. FTP does not support proxy.  Also note the following entry in the release notes. http://download.oracle.com/docs/cd/E15523_01/relnotes.1111/e10133/b2b.htm#CHDJAFBC 15.1.45 FTP Listening Channel Does Not Have Proxy Support The Generic FTP-1.0 protocol for a listening channel does not have proxy support.The wording states listening channel, but it also applies for delivery channel.

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• networking disabled

  - by Parimal

  hi i have internet working but the network manager applet in the ubuntu 10.10 says that it is disabled and i am not able to enable it however i have previously forced the ip address which i am still getting in ifconfig but in wired section of network connections there is no such interface as eth0 where can i see these settings and how can i enable the etwork manager applet in the title bar thanks in advance

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• Ubutu 14.04 triple screen, third screen black and X cursor

  - by Horse

  I am having some issues getting my third screen working properly. I had triple screens working fine on 12.04, using 2 nvidia cards. Did a fresh install of 14.04 and having no end of problems getting it working. It either will just be disabled, or the screen is black with the cursor as an X. I can only enable it from the nvidia server settings tool. The Ubuntu native display settings won't even show the 3rd screen. I tried copying the xorg.conf from my old install, which upon restarting X worked fine on the login screen, but then it just sat there after I logged in and didn’t do anything (mouse was still working). I am using gnome-session-fallback instead of unity if that makes any difference. Still having these issues if I try unity though. How do I get my 3rd screen working and displaying a desktop? Here is my current xorg.conf # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 331.20 (buildd@roseapple) Mon Feb 3 15:07:22 UTC 2014 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 Screen 1 "Screen1" RightOf "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "DELL 1907FP" HorizSync 30.0 - 81.0 VertRefresh 56.0 - 76.0 Option "DPMS" EndSection Section "Monitor" # HorizSync source: unknown, VertRefresh source: unknown Identifier "Monitor1" VendorName "Unknown" ModelName "DELL 1907FP" HorizSync 0.0 - 0.0 VertRefresh 0.0 Option "DPMS" EndSection Section "Monitor" Identifier "Monitor2" VendorName "Unknown" ModelName "DELL 1907FP" HorizSync 30.0 - 81.0 VertRefresh 56.0 - 76.0 EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 580" BusID "PCI:1:0:0" EndSection Section "Device" Identifier "Device1" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GT 520" BusID "PCI:3:0:0" EndSection Section "Device" Identifier "Device2" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GT 520" BusID "PCI:3:0:0" EndSection Section "Screen" # Removed Option "metamodes" "DVI-I-2: nvidia-auto-select +0+0, DVI-I-3: nvidia-auto-select +1280+0" # Removed Option "metamodes" "DVI-I-2: nvidia-auto-select +0+0" # Removed Option "SLI" "Off" # Removed Option "BaseMosaic" "off" # Removed Option "metamodes" "GPU-109d4eb8-b40b-87d7-3fd6-95830d1d5215.DVI-I-2: nvidia-auto-select +0+0, GPU-109d4eb8-b40b-87d7-3fd6-95830d1d5215.DVI-I-3: nvidia-auto-select +1280+0, GPU-82e96214-175e-5e6a-218c-5bdbc948daf2.DVI-I-1: nvidia-auto-select +3200+0" # Removed Option "SLI" "off" # Removed Option "BaseMosaic" "on" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "Stereo" "0" Option "nvidiaXineramaInfoOrder" "DFP-0" Option "metamodes" "DVI-I-2: nvidia-auto-select +0+0, DVI-I-3: nvidia-auto-select +1280+0" Option "SLI" "Off" Option "MultiGPU" "Off" Option "BaseMosaic" "off" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" # Removed Option "metamodes" "nvidia-auto-select +0+0" # Removed Option "metamodes" "DVI-I-3: nvidia-auto-select +0+0" Identifier "Screen1" Device "Device1" Monitor "Monitor1" DefaultDepth 24 Option "Stereo" "0" Option "metamodes" "nvidia-auto-select +0+0" Option "SLI" "Off" Option "MultiGPU" "Off" Option "BaseMosaic" "off" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen2" Device "Device2" Monitor "Monitor2" DefaultDepth 24 Option "Stereo" "0" Option "metamodes" "nvidia-auto-select +0+0" Option "SLI" "Off" Option "MultiGPU" "Off" Option "BaseMosaic" "off" SubSection "Display" Depth 24 EndSubSection EndSection Here is my old 'working in 12.04' xorg.conf # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 310.19 ([email protected]) Thu Nov 8 02:08:55 PST 2012 Section "ServerLayout" # Removed Option "Xinerama" "0" Identifier "Layout0" Screen 0 "Screen0" 0 0 Screen 1 "Screen1" RightOf "Screen2" Screen 2 "Screen2" RightOf "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "1" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "DELL 1907FP" HorizSync 30.0 - 81.0 VertRefresh 56.0 - 76.0 Option "DPMS" EndSection Section "Monitor" # HorizSync source: unknown, VertRefresh source: unknown Identifier "Monitor1" VendorName "Unknown" ModelName "DELL 1907FP" HorizSync 30.0 - 81.0 VertRefresh 56.0 - 76.0 Option "DPMS" EndSection Section "Monitor" Identifier "Monitor2" VendorName "Unknown" ModelName "Apple Cinema HD" HorizSync 74.0 - 74.6 VertRefresh 59.9 - 60.0 EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 580" BusID "PCI:1:0:0" Screen 0 EndSection Section "Device" Identifier "Device1" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GT 520" BusID "PCI:3:0:0" EndSection Section "Device" Identifier "Device2" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 580" BusID "PCI:1:0:0" Screen 1 EndSection Section "Screen" # Removed Option "metamodes" "DFP-0: nvidia-auto-select +0+0, DFP-2: nvidia-auto-select +1280+0" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "Stereo" "0" Option "metamodes" "DFP-0: nvidia-auto-select +0+0; DFP-0: nvidia-auto-select +0+0; DFP-0: 1280x1024_75 +0+0; DFP-0: 1152x864 +0+0; DFP-0: 1024x768 +0+0; DFP-0: 1024x768_60 +0+0; DFP-0: 800x600 +0+0; DFP-0: 800x600_60 +0+0; DFP-0: 640x480 +0+0; DFP-0: 640x480_60 +0+0; DFP-0: nvidia-auto-select +0+0 {viewportout=1280x720+0+152}" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "Device1" Monitor "Monitor1" DefaultDepth 24 Option "Stereo" "0" Option "metamodes" "nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen2" Device "Device2" Monitor "Monitor2" DefaultDepth 24 Option "Stereo" "0" Option "metamodes" "DFP-2: nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Extensions" Option "Composite" "Disable" EndSection

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• Oracle VM RAC template - what it took

  - by wcoekaer

  In my previous posting I introduced the latest Oracle Real Application Cluster / Oracle VM template. I mentioned how easy it is to deploy a complete Oracle RAC cluster with Oracle VM. In fact, you don't need any prior knowledge at all to get a complete production-ready setup going. Here is an example... I built a 4 node RAC cluster, completely configured in just over 40 minutes - starting from import template into Oracle VM, create VMs to fully up and running Oracle RAC. And what was needed? 1 textfile with some hostnames and ip addresses and deploycluster.py. The setup is a 4 node cluster where each VM has 8GB of RAM and 4 vCPUs. The shared ASM storage in this case is 100GB, 5 x 20GB volumes. The VM names are racovm.0-racovm.3. The deploycluster script starts the VMs, verifies the configuration and sends the database cluster configuration info through Oracle VM Manager to the 4 node VMs. Once the VMs are up and running, the first VM starts the actual Oracle RAC setup inside and talks to the 3 other VMs. I did not log into any VM until after everything was completed. In fact, I connected to the database remotely before logging in at all. # ./deploycluster.py -u admin -H localhost --vms racovm.0,racovm.1,racovm.2,racovm.3 --netconfig ./netconfig.ini Oracle RAC OneCommand (v1.1.0) for Oracle VM - deploy cluster - (c) 2011-2012 Oracle Corporation (com: 26700:v1.1.0, lib: 126247:v1.1.0, var: 1100:v1.1.0) - v2.4.3 - wopr8.wimmekes.net (x86_64) Invoked as root at Sat Jun 2 17:31:29 2012 (size: 37500, mtime: Wed May 16 00:13:19 2012) Using: ./deploycluster.py -u admin -H localhost --vms racovm.0,racovm.1,racovm.2,racovm.3 --netconfig ./netconfig.ini INFO: Login password to Oracle VM Manager not supplied on command line or environment (DEPLOYCLUSTER_MGR_PASSWORD), prompting... Password: INFO: Attempting to connect to Oracle VM Manager... INFO: Oracle VM Client (3.1.1.305) protocol (1.8) CONNECTED (tcp) to Oracle VM Manager (3.1.1.336) protocol (1.8) IP (192.168.1.40) UUID (0004fb0000010000cbce8a3181569a3e) INFO: Inspecting /root/rac/deploycluster/netconfig.ini for number of nodes defined... INFO: Detected 4 nodes in: /root/rac/deploycluster/netconfig.ini INFO: Located a total of (4) VMs; 4 VMs with a simple name of: ['racovm.0', 'racovm.1', 'racovm.2', 'racovm.3'] INFO: Verifying all (4) VMs are in Running state INFO: VM with a simple name of "racovm.0" is in a Stopped state, attempting to start it...OK. INFO: VM with a simple name of "racovm.1" is in a Stopped state, attempting to start it...OK. INFO: VM with a simple name of "racovm.2" is in a Stopped state, attempting to start it...OK. INFO: VM with a simple name of "racovm.3" is in a Stopped state, attempting to start it...OK. INFO: Detected that all (4) VMs specified on command have (5) common shared disks between them (ASM_MIN_DISKS=5) INFO: The (4) VMs passed basic sanity checks and in Running state, sending cluster details as follows: netconfig.ini (Network setup): /root/rac/deploycluster/netconfig.ini buildcluster: yes INFO: Starting to send cluster details to all (4) VM(s)....... INFO: Sending to VM with a simple name of "racovm.0".... INFO: Sending to VM with a simple name of "racovm.1"..... INFO: Sending to VM with a simple name of "racovm.2"..... INFO: Sending to VM with a simple name of "racovm.3"...... INFO: Cluster details sent to (4) VMs... Check log (default location /u01/racovm/buildcluster.log) on build VM (racovm.0)... INFO: deploycluster.py completed successfully at 17:32:02 in 33.2 seconds (00m:33s) Logfile at: /root/rac/deploycluster/deploycluster2.log my netconfig.ini # Node specific information NODE1=db11rac1 NODE1VIP=db11rac1-vip NODE1PRIV=db11rac1-priv NODE1IP=192.168.1.56 NODE1VIPIP=192.168.1.65 NODE1PRIVIP=192.168.2.2 NODE2=db11rac2 NODE2VIP=db11rac2-vip NODE2PRIV=db11rac2-priv NODE2IP=192.168.1.58 NODE2VIPIP=192.168.1.66 NODE2PRIVIP=192.168.2.3 NODE3=db11rac3 NODE3VIP=db11rac3-vip NODE3PRIV=db11rac3-priv NODE3IP=192.168.1.173 NODE3VIPIP=192.168.1.174 NODE3PRIVIP=192.168.2.4 NODE4=db11rac4 NODE4VIP=db11rac4-vip NODE4PRIV=db11rac4-priv NODE4IP=192.168.1.175 NODE4VIPIP=192.168.1.176 NODE4PRIVIP=192.168.2.5 # Common data PUBADAP=eth0 PUBMASK=255.255.255.0 PUBGW=192.168.1.1 PRIVADAP=eth1 PRIVMASK=255.255.255.0 RACCLUSTERNAME=raccluster DOMAINNAME=wimmekes.net DNSIP= # Device used to transfer network information to second node # in interview mode NETCONFIG_DEV=/dev/xvdc # 11gR2 specific data SCANNAME=db11vip SCANIP=192.168.1.57 last few lines of the in-VM log file : 2012-06-02 14:01:40:[clusterstate:Time :db11rac1] Completed successfully in 2 seconds (0h:00m:02s) 2012-06-02 14:01:40:[buildcluster:Done :db11rac1] Build 11gR2 RAC Cluster 2012-06-02 14:01:40:[buildcluster:Time :db11rac1] Completed successfully in 1779 seconds (0h:29m:39s) From start_vm to completely configured : 29m:39s. The other 10m was the import template and create 4 VMs from template along with the shared storage configuration. This consists of a complete Oracle 11gR2 RAC database with ASM, CRS and the RDBMS up and running on all 4 nodes. Simply connect and use. Production ready. Oracle on Oracle.

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• Server Side Developer Prerequisites

  - by Jking

  I am new to server side development and am currently learning node.js. What sort of networking information should I be familiar with to allow for a smooth learning curve with server side development. Could anyone provide resources pertaining to the information required to get into server programming? To give you a better idea of my standpoint: I do not know how a server interacts with a database [Q: How does a NoSQL database, or database in general, communicate with a server?] I am unsure of how a web stack works [Q: I have heard of LAMP but do not know how Apache, MySQL, and PHP interact. Hopefully this applies to other stacks as well. How do the components of a stack work together? Also, is a MEAN stack an alternative, or is it completely irrelevant to this] I have trivial knowledge of internet protocol [however extremely inefficient][Q: What resources are beneficial when learning about networking, and how much/what knowledge should I acquire to program on the server side] I am unsure of what I am unsure of concerning networking information necessary to start development Information on how the client-server model works would be greatly appreciated

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• Bay Area Coherence Special Interest Group Next Meeting July 21, 2011

  - by csoto

  Date: Thursday, July 21, 2011 Time: 4:30pm - 8:15pm ET (note that Parking at 475 Sansome Closes at 8:30pm) Where: Oracle Office, 475 Sansome Street, San Francisco, CA Google Map We will be providing snacks and beverages. Register! - Registration is required for building security. Presentation Line Up:? 5:10pm - Batch Processing Using Coherence in Oracle Group Policy Administration - Paul Cleary, Oracle Oracle Insurance Policy Administration (OIPA) is a flexible, rules-based policy administration solution that provides full record keeping for all policy lifecycle transactions. One component of OIPA is Cycle processing, which is the batch processing of pending insurance transactions. This presentation introduces OIPA and Cycle processing, describing the unique challenges of processing a high volume of transactions within strict time windows. It then reviews how OIPA uses Oracle Coherence and the Processing Pattern to meet these challenges, describing implementation specifics that highlight the simplicity and robustness of the Processing Pattern. 6:10pm - Secure, Optimize, and Load Balance Coherence with F5 - Chris Akker, F5 F5 Networks, Inc., the global leader in Application Delivery Networking, helps the world’s largest enterprises and service providers realize the full value of virtualization, cloud computing, and on-demand IT. Recently, F5 and Oracle partnered to deliver a novel solution that integrates Oracle Coherence 3.7 with F5 BIG-IP Local Traffic Manager (LTM). This session will introduce F5 and how you can leverage BIG-IP LTM to secure, optimize, and load balance application traffic generated from Coherence*Extend clients across any number of servers in a cluster and to hardware-accelerate CPU-intensive SSL encryption. 7:10pm - Using Oracle Coherence to Enable Database Partitioning and DC Level Fault Tolerance - Alexei Ragozin, Independent Consultant and Brian Oliver, Oracle Partitioning is a very powerful technique for scaling database centric applications. One tricky part of partitioned architecture is routing of requests to the right database. The routing layer (routing table) should know the right database instance for each attribute which may be used for routing (e.g. account id, login, email, etc): it should be fast, it should fault tolerant and it should scale. All the above makes Oracle Coherence a natural choice for implementing such routing tables in partitioned architectures. This presentation will cover synchronization of the grid with multiple databases, conflict resolution, cross cluster replication and other aspects related to implementing robust partitioned architecture. Additional Info:?? - Download Past Presentations: The presentations from the previous meetings of the BACSIG are available for download here. Click on the presentation titles to download the PDF files. - Join the Coherence online community on our Oracle Coherence Users Group on LinkedIn. - Contact BACSIG with any comments, questions, presentation proposals and content suggestions.

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• Oracle Database 11g Release 2 Now Available on 32-bit and x64 Windows

  - by jenny.gelhausen

  Oracle Database 11g Release 2 provides the foundation for IT to successfully deliver more information with higher quality of service, reduce the risk of change within IT, and make more efficient use of their IT budgets. By deploying Oracle Database 11g Release 2 as their data management foundation, organizations can utilize the full power of the world's leading database. Now Oracle Database 11g Release 2 is available for organizations using 32-bit and x64 Windows. Download either on OTN var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• Computacenter first partner to offer Oracle Exadata proof-of-concept environment for real-world test

  - by kimberly.billings

  Computacenter (http://www.computacenter.com/), Europe's leading independent provider of IT infrastructure services, recently announced that it is the first partner to offer an Oracle Exadata 'proof-of concept' environment for real-world testing. This new center, combined with Computacenter's extensive database storage skills, will enable organisations to accurately test Oracle Exadata with their own workloads, clearly demonstrating the case for migration. For more information, read the press release. Are you planning to migrate to Oracle Exadata? Tell us about it! var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• modifying openssl library code

  - by Nouar Ismail

  I am ordered to check the availability to customize an encryption algorithm the IPsec protocol use in Ubuntu, if anyone have any suggestion about this point?. I've read that the encryption operation occur in libcrypto in openssl. when I tried to compile and install OpenSSL from source ..I had everything ok with the installation, but when to check the version installed on the system, with "dpkg -s openssl", it didn't seem that it's the version i had already installed, maybe it had been installed successfully, but the question is: would it be the version the system use for encryption operations? would it overwrite the old version? and would my changes in code have effects ? any help please? thank you in advance.

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• How to reset settings when Unity won't finish booting?

  - by Emre

  I have a new 12.04 installation and I messed things up after trying to move /home to an NTFS partition, which I later learned was a bad idea. I removed references to the NTFS partition on fstab and created new users on the ext4 / partition. Now I can't get Unity to start up properly for any user. I get the GUI with only three Launch icons (none of which are clickable) and no bar at the top. The keyboard seems to the nonfunctional after I enter my credentials. The interesting thing is that I can boot when I go through recovery mode and select resume. I wonder whether I am creating the new users properly. What is the correct protocol for doing so in order to ensure that they can run Unity?

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• How these files can be accessed?

  - by harsh.singla

  The files can be accessed from every artifact, such as .bpel, .mplan, .task, .xsl, .wsdl etc., of the composite. 'oramds' protocol is used to access these files. You need to setup your adf-config.xml file in your dev environment or Jdeveloper to access these files from MDS. Here is the sample adf-config.xml. xmlns:sec="http://xmlns.oracle.com/adf/security/config" name="jdbc-url"/ name="metadata-path"/ credentialStoreLocation="../../src/META-INF/jps-config.xml"/ This adf-config.xml is located in directory named .adf/META-INF, which is in the application home of your project. Application home is the directory where .jws file of you application exists. Other than setting this file, you need not make any other changes in your project or composite to access MDS. After setting this up, you can create a new SOA-MDS connection in your Jdev. This enables you to have a resource pallet in which you can browse and choose the required file from MDS.

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• Verizon Business Delivers New Sales and Support Tools

  - by michael.seback

  Verizon Business Delivers New Sales and Support Tools and Improves System Performance by 35% Verizon Business, a unit of Verizon Communications, is a global leader in communications and IT solutions. With one of the world's most connected internet protocol networks, Verizon Business delivers communications, IT, security, and network solutions to many of the largest businesses and governments. ..."Our work with Accenture to upgrade our Oracle systems has improved system performance significantly. In a recent survey, 84% of users said performance was 'faster' or 'much faster.' Plus, our sales and support staff have new tools to improve productivity and customer service, which ultimately drives customer retention and revenue." - Rob Moore, Director Verizon Business ...Read more.

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• Do Limited Wi-Fi Channels Restrict Network Availability?

  - by Jason Fitzpatrick

  Wi-Fi protocol supports 13 communication channels; how do these channels relate to the volume of devices you can have on the network and the quality of the connection? Read on learn more about Wi-Fi channel usage. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It How To Delete, Move, or Rename Locked Files in Windows

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• JavaOne - Java SE Embedded Booth - Digi - Home Health Hub (HHH)

  - by David Clack

  Hi All,  So another exciting platform we will have in the booth at JavaOne is the Digi  Home Health Hub (HHH) platform. http://www.digi.com/products/wireless-wired-embedded-solutions/single-board-computers/idigi-telehealth-application-kit#overview This is a Freescale reference design that has been built by Digi, the system is powered by a Freescale i.MX28 ARM SOC, what's really exciting me is it has every wireless protocol you could ever want on a single motherboard. Ethernet, 802.11b/g/n Wi-Fi, Bluetooth, ZigBee, configurable Sub-GHz radio, NFC plus USB, audio and LCD/touch screen option. I've been experimenting with lots of wireless capable healthcare products in the last few months, plus some Bluetooth Pulse / Oxy meters, we have been looking at how the actual healthcare wireless protocols work. Steve Popovich - Vice President, Digi Internationalwill be doing a talk at the Java Embedded @ JavaOne conference in the Hotel Nikko, right next door to the JavaOne show in the Hilton. If you are registered at JavaOne you can come over to the Java Embedded @ JavaOne for $100 Come see us in booth 5605 See you there Dave

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• Routing PHP memcached calls to Oracle Coherence

  - by cj

  A new post Getting Started with the Coherence Memcached Adaptor from David Felcey shows how PHP memcached calls can automatically be routed to store data in Oracle Coherence 12c. This is possible now Coherence 12.1.3 supports Memcached clients using the Binary Memcached protocol. David's post shows how the Coherence Memcached adaptor can be configured as a proxy service that runs in the Coherence cluster. There's nothing particular to configure in the PHP application, except to enable memcached.use_sasl = 1 So what is Coherence? It is an "in-memory data grid solution", with a number of advanced features. You can read more in the Oracle Coherence 12C Data Sheet.

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• ASP.NET: Using pickup directory for outgoing e-mails

  - by DigiMortal

  Sending e-mails out from web applications is very common task. When we are working on or test our systems with real e-mail addresses we don’t want recipients to receive e-mails (specially if we are using some subset of real data9. In this posting I will show you how to make ASP.NET SMTP client to write e-mails to disc instead of sending them out. SMTP settings for web application I have seen many times the code where all SMTP information is kept in app settings just to read them in code and give to SMTP client. It is not necessary because we can define all these settings under system.web => mailsettings node. If you are using web.config to keep SMTP settings then all you have to do in your code is just to create SmtpClient with empty constructor. var smtpClient = new SmtpClient(); Empty constructor means that all settings are read from web.config file. What is pickup directory? If you want drastically raise e-mail throughput of your SMTP server then it is not very wise plan to communicate with it using SMTP protocol. it adds only additional overhead to your network and SMTP server. Okay, clients make connections, send messages out and it is also overhead we can avoid. If clients write their e-mails to some folder that SMTP server can access then SMTP server has e-mail forwarding as only resource-eager task to do. File operations are way faster than communication over SMTP protocol. The directory where clients write their e-mails as files is called pickup directory. By example, Exchange server has support for pickup directories. And as there are applications with a lot of users who want e-mail notifications then .NET SMTP client supports writing e-mails to pickup directory instead of sending them out. How to configure ASP.NET SMTP to use pickup directory? Let’s say, it is more than easy. It is very easy. This is all you need. <system.net>   <mailSettings>     <smtp deliveryMethod="SpecifiedPickupDirectory">       <specifiedPickupDirectory pickupDirectoryLocation="c:\temp\maildrop\"/>     </smtp>   </mailSettings> </system.net> Now make sure you don’t miss come points: Pickup directory must physically exist because it is not created automatically. IIS (or Cassini) must have write permissions to pickup directory. Go through your code and look for hardcoded SMTP settings. Also take a look at all places in your code where you send out e-mails that there are not some custom settings used for SMTP! Also don’t forget that your mails will be written now to pickup directory and they are not sent out to recipients anymore. Advanced scenario: configuring SMTP client in code In some advanced scenarios you may need to support multiple SMTP servers. If configuration is dynamic or it is not kept in web.config you need to initialize your SmtpClient in code. This is all you need to do. var smtpClient = new SmtpClient(); smtpClient.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory; smtpClient.PickupDirectoryLocation = pickupFolder; Easy, isn’t it? i like when advanced scenarios end up with simple and elegant solutions but not with rocket science. Note for IIS SMTP service SMTP service of IIS is also able to use pickup directory. If you have set up IIS with SMTP service you can configure your ASP.NET application to use IIS pickup folder. In this case you have to use the following setting for delivery method. SmtpDeliveryMethod.PickupDirectoryFromIis You can set this setting also in web.config file. <system.net>   <mailSettings>     <smtp deliveryMethod="PickupDirectoryFromIis" />   </mailSettings> </system.net> Conclusion Who was still using different methods to avoid sending e-mails out in development or testing environment can now remove all the bad code from application and live on mail settings of ASP.NET. It is easy to configure and you have less code to support e-mails when you use built-in e-mail features wisely.

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• ssh: connect to host xxx.xxx.xxx.xxx port 22: Connection refused

  - by Umair Mustafa

  Well im trying to connect to a client machine using ssh using this command ssh root@ip-of-server It immediately slaps me with this error ssh: connect to host xxx.xxx.xxx.xxx port 22: Connection refused Then I tried to access a local server using same command it worked. For further experiment I tried to do ssh [email protected] It displayed the same error Whats wrong here. Any suggestion

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• EPM Architecture: Foundation

  - by Marc Schumacher

  This post is the first of a series that is going to describe the EPM System architecture per component. During the following weeks a couple of follow up posts will describe each component. If applicable, the component will have its standard port next to its name in brackets. EPM Foundation is Java based and consists of two web applications, Shared Services and Workspace. Both applications are accessed by browser through Oracle HTTP Server (OHS) or Internet Information Services (IIS). Communication to the backend database is done by JDBC. The file system to store Lifecycle Management (LCM) artifacts can be either local or remote (e.g. NFS, network share). For authentication purposes, the EPM Product Suite can connect to external directories or databases. Interaction with other EPM Suite components like product specific Lifecycle Management connectors or Reporting and Analysis Web happens through HTTP protocol. The next post will cover Reporting and Analysis.

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• Bash script won't stay open in background after running through while

  - by jfreak53

  I can't get the following bash script to stay open after the first message is received from NC: #!/bin/bash port=3333 nc -l $port | while read msg; do notify-send Alert "$msg"; done After the first message it exits. I want it to stay open and continue monitoring for new messages from NC. I know that if I launch nc -l port without the while loop it stays open and I can chat away between the two connections even disconnect from the connected host. I am sending the message using: echo 'done' | nc IP port

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• KVM Bridged Network Not Working

  - by EApubs

  I just installed KVM on my Ubuntu Server according to this guide : https://help.ubuntu.com/community/KVM/Installation Then prepared a bridged network as shown in here : https://help.ubuntu.com/community/KVM/Networking Then, I created a virtual machine with virt-manager. I tried several times but the guest fails to connect to the network! Any help? ifconfig : br0 Link encap:Ethernet HWaddr d0:27:88:b0:e4:38 inet addr:192.168.20.100 Bcast:192.168.20.255 Mask:255.255.255.0 inet6 addr: fe80::d227:88ff:feb0:e438/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:62 errors:0 dropped:0 overruns:0 frame:0 TX packets:62 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:10493 (10.4 KB) TX bytes:8433 (8.4 KB) eth0 Link encap:Ethernet HWaddr d0:27:88:b0:e4:38 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:62 errors:0 dropped:0 overruns:0 frame:0 TX packets:63 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:11361 (11.3 KB) TX bytes:8479 (8.4 KB) Interrupt:41 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) virbr0 Link encap:Ethernet HWaddr 5a:8c:57:95:af:3b inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) brctl show : bridge name bridge id STP enabled interfaces br0 8000.d02788b0e438 no eth0 virbr0 8000.000000000000 yes brctl showmacs br0 : port no mac addr is local? ageing timer 1 5c:d9:98:67:b6:28 no 48.33 1 d0:27:88:b0:e4:38 yes 0.00 1 e0:2a:82:f9:6c:09 no 0.00 ip route : default via 192.168.20.1 dev br0 metric 100 192.168.20.0/24 dev br0 proto kernel scope link src 192.168.20.100 192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 *In the guest * I was unable to copy paste the info from the guest because can't ssh to it. It didn't get any ip from DHCP. Won't work even after setting it up manually.

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• When should I use AtomPub?

  - by Gary Rowe

  I have been conducting some research into RESTful web service design and I've reached what I think is a key decision point so I thought I'd offer it up to the community to get some advice. In keeping with the principles of a RESTful architecture I want to present a discoverable API, so I will be supporting the various HTTP verbs as fully as possible. My difficulty comes with the choice of representation of those resources. You see, it would be easy for me to come up with my own API that covers how search results are to be presented and how links to other resources are provided, but this would be unique to my application. I've read about the Atom Publishing Protocol (RFC 5023), and how OData promotes its use, but it seems to add an extra level of abstraction over what is (currently) a rather simple API. So my question is, when should a developer select AtomPub as their choice of representation - if at all? And if not, what is the current recommended approach?

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• Save BIG on Storage &mdash; with Oracle Advanced Compression

  - by [email protected]

  Recently, we published a podcast revealing just how much Oracle benefits from its internal use of Oracle Database 11g and Advanced Compression. With hundreds of TB and millions of dollars saved, Oracle Advanced Compression is dramatically reducing storage costs and substantially improving efficiency across the company. Now, here's your chance: Meet the experts, have your questions answered by them and immediately start using your storage more efficiently: On April 14th, join me for a live Webcast with Oracle's Tim Shetler, Vice President of Product Management and Bill Hodak, Principal Product Manager, to learn just how Oracle Advanced Compression can Reduce disk space requirements for all types of data Improve query and storage performance Lower storage costs throughout the datacenter Register here! var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• How do I patch a kernel bug?

  - by Primož Kralj

  Sometimes I can't boot my laptop - it gets stuck here: Then I have to do a hard-reset and it's fine. I checked the boot logs and this is what I think it's causing it (nevermind the timestamp inconsistencies): [38.377595] BUG: unable to handle kernel NULL pointer dereference at (null) [38.377821] IP: [<ffffffffa01f6d7b>] r600_pcie_gart_tlb_flush+0xeb/0x110 [radeon] [38.378065] PGD 121491067 PUD 121492067 PMD 0 [38.378214] Oops: 0000 [#1] SMP Here is the full log. I found the patches but I have no idea about which to use and how.

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