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  • Building a new cluster for mathematical calculations (Win/Lin)

    - by Muhammad Farhan
    I would like to build a new cluster to perform heavy mathematical calculations in Matlab and Abaqus. One of my friend told me that distributed computing is way faster than parallel computing, which is very true after reading a bit on the internet. However, I have never clustered before. Current workstation I own: Dell Precision T5400 2 x Intel Xeon 2.5 GHz 16 GB RAM (2GB x 8) 1 x Western Digital 1TB HDD 7200 rpm 1 x nVidia Quadro FX4600 768MB GPU 1 x 870W PSU OS: Windows 7 Ultimate 64-bit 2nd WS: I can buy another WS similar configuration to the one I own I am not bothered about OS, I am willing to cluster with either Windows or Linux. However, my software are compatible with windows 64-bit only. Please help me setup a cluster. Thank you.

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  • .wine-pipelight folder not present

    - by DaimyoKirby
    Following the instructions on the pipelight installation page, I installed pipelight on Ubuntu 14.04. However, upon opening firefox the .wine-pipelight folder isn't present in my home folder, and I get the following errors: [PIPELIGHT:LIN:unknown] attached to process. [PIPELIGHT:LIN:unknown] checking environment variable PIPELIGHT_SILVERLIGHT5_1_CONFIG. [PIPELIGHT:LIN:unknown] searching for config file pipelight-silverlight5.1. [PIPELIGHT:LIN:unknown] trying to load config file from '/home/alden/.config/pipelight-silverlight5.1'. [PIPELIGHT:LIN:silverlight5.1] basicplugin.c:427:checkSilverlightGraphicDriver(): error in execlp command - probably silverlightGraphicDriverCheck not found or missing execute permission. [PIPELIGHT:LIN:silverlight5.1] basicplugin.c:441:checkSilverlightGraphicDriver(): GPU driver check - Your driver is not in the whitelist, hardware acceleration disabled. [PIPELIGHT:LIN:silverlight5.1] using wine prefix directory /home/alden/.wine-pipelight. [PIPELIGHT:LIN:silverlight5.1] checking plugin installation - this might take some time. [PIPELIGHT:LIN:silverlight5.1] basicplugin.c:374:checkPluginInstallation(): error in execvp command - probably dependencyInstaller/sandbox not found or missing execute permission. [PIPELIGHT:LIN:silverlight5.1] basicplugin.c:384:checkPluginInstallation(): Plugin installer did not run correctly (exitcode = 1). [PIPELIGHT:LIN:silverlight5.1] basicplugin.c:108:attach(): plugin not correctly installed - aborting. I've reinstalled quite a few times and ran through many of the common fixes offered on the pipelight Launchpad pages and here on AskUbunta and still it fails to run. Is there a reason why this folder isn't present, or why I'm getting these errors? Edit: Oddly enough, the .wine-pipelight folder is created wtih I open Nitro, although this still doesn't fix the issue.

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  • Problems with Software Sources -- I tried to add a Repository and it failed. How do I fix it?

    - by Brenton Horne
    As in the title. I tried to add a Repository, how do I remove it. It won't let me via the software-sources program. I tried sudo ppa-purge ppa:quantal (the name of it) and it failed anyone got any ideas? (lin 1) deb http://archive.ubuntu.com/ubuntu/ quantal main restricted universe multiverse (lin 2) deb-src http://archive.ubuntu.com/ubuntu/ quantal main restricted universe multiverse #Added by software-properties (lin 3) deb http://security.ubuntu.com/ubuntu/ quantal-security main restricted universe multiverse (lin 4) deb-src http://security.ubuntu.com/ubuntu/ quantal-security main restricted universe multiverse #Added by software-properties (lin 5) deb http://archive.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse (lin 6) deb-src http://archive.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse #Added by software-properties (lin 7) deb http://launchpad.net/ubuntu/quantal/amd64/ quantal (lin 8) deb-src http://launchpad.net/ubuntu/quantal/amd64/ quantal -- sources.list file contents

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  • Given an XML which contains a representation of a graph, how to apply it DFS algorithm? [on hold]

    - by winston smith
    Given the followin XML which is a directed graph: <?xml version="1.0" encoding="iso-8859-1" ?> <!DOCTYPE graph PUBLIC "-//FC//DTD red//EN" "../dtd/graph.dtd"> <graph direct="1"> <vertex label="V0"/> <vertex label="V1"/> <vertex label="V2"/> <vertex label="V3"/> <vertex label="V4"/> <vertex label="V5"/> <edge source="V0" target="V1" weight="1"/> <edge source="V0" target="V4" weight="1"/> <edge source="V5" target="V2" weight="1"/> <edge source="V5" target="V4" weight="1"/> <edge source="V1" target="V2" weight="1"/> <edge source="V1" target="V3" weight="1"/> <edge source="V1" target="V4" weight="1"/> <edge source="V2" target="V3" weight="1"/> </graph> With this classes i parsed the graph and give it an adjacency list representation: import java.io.IOException; import java.util.HashSet; import java.util.LinkedList; import java.util.Collection; import java.util.Iterator; import java.util.logging.Level; import java.util.logging.Logger; import practica3.util.Disc; public class ParsingXML { public static void main(String[] args) { try { // TODO code application logic here Collection<Vertex> sources = new HashSet<Vertex>(); LinkedList<String> lines = Disc.readFile("xml/directed.xml"); for (String lin : lines) { int i = Disc.find(lin, "source=\""); String data = ""; if (i > 0 && i < lin.length()) { while (lin.charAt(i + 1) != '"') { data += lin.charAt(i + 1); i++; } Vertex v = new Vertex(); v.setName(data); v.setAdy(new HashSet<Vertex>()); sources.add(v); } } Iterator it = sources.iterator(); while (it.hasNext()) { Vertex ver = (Vertex) it.next(); Collection<Vertex> adyacencias = ver.getAdy(); LinkedList<String> ls = Disc.readFile("xml/graphs.xml"); for (String lin : ls) { int i = Disc.find(lin, "target=\""); String data = ""; if (lin.contains("source=\""+ver.getName())) { Vertex v = new Vertex(); if (i > 0 && i < lin.length()) { while (lin.charAt(i + 1) != '"') { data += lin.charAt(i + 1); i++; } v.setName(data); } i = Disc.find(lin, "weight=\""); data = ""; if (i > 0 && i < lin.length()) { while (lin.charAt(i + 1) != '"') { data += lin.charAt(i + 1); i++; } v.setWeight(Integer.parseInt(data)); } if (v.getName() != null) { adyacencias.add(v); } } } } for (Vertex vert : sources) { System.out.println(vert); System.out.println("adyacencias: " + vert.getAdy()); } } catch (IOException ex) { Logger.getLogger(ParsingXML.class.getName()).log(Level.SEVERE, null, ex); } } } This is another class: import java.util.Collection; import java.util.Objects; public class Vertex { private String name; private int weight; private Collection ady; public Collection getAdy() { return ady; } public void setAdy(Collection adyacencias) { this.ady = adyacencias; } public String getName() { return name; } public void setName(String nombre) { this.name = nombre; } public int getWeight() { return weight; } public void setWeight(int weight) { this.weight = weight; } @Override public int hashCode() { int hash = 7; hash = 43 * hash + Objects.hashCode(this.name); hash = 43 * hash + this.weight; return hash; } @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } final Vertex other = (Vertex) obj; if (!Objects.equals(this.name, other.name)) { return false; } if (this.weight != other.weight) { return false; } return true; } @Override public String toString() { return "Vertice{" + "name=" + name + ", weight=" + weight + '}'; } } And finally: /** * * @author user */ /* -*-jde-*- */ /* <Disc.java> Contains the main argument*/ import java.io.*; import java.util.LinkedList; /** * Lectura y escritura de archivos en listas de cadenas * Ideal para el uso de las clases para gráficas. * * @author Peralta Santa Anna Victor Miguel * @since Julio 2011 */ public class Disc { /** * Metodo para lectura de un archivo * * @param fileName archivo que se va a leer * @return El archivo en representacion de lista de cadenas */ public static LinkedList<String> readFile(String fileName) throws IOException { BufferedReader file = new BufferedReader(new FileReader(fileName)); LinkedList<String> textlist = new LinkedList<String>(); while (file.ready()) { textlist.add(file.readLine().trim()); } file.close(); /* for(String linea:textlist){ if(linea.contains("source")){ //String generado = linea.replaceAll("<\\w+\\s+\"", ""); //System.out.println(generado); } }*/ return textlist; }//readFile public static int find(String linea,String palabra){ int i,j; boolean found = false; for(i=0,j=0;i<linea.length();i++){ if(linea.charAt(i)==palabra.charAt(j)){ j++; if(j==palabra.length()){ found = true; return i; } }else{ continue; } } if(!found){ i= -1; } return i; } /** * Metodo para la escritura de un archivo * * @param fileName archivo que se va a escribir * @param tofile la lista de cadenas que quedaran en el archivo * @param append el bit que dira si se anexa el contenido o se empieza de cero */ public static void writeFile(String fileName, LinkedList<String> tofile, boolean append) throws IOException { FileWriter file = new FileWriter(fileName, append); for (int i = 0; i < tofile.size(); i++) { file.write(tofile.get(i) + "\n"); } file.close(); }//writeFile /** * Metodo para escritura de un archivo * @param msg archivo que se va a escribir * @param tofile la cadena que quedaran en el archivo * @param append el bit que dira si se anexa el contenido o se empieza de cero */ public static void writeFile(String msg, String tofile, boolean append) throws IOException { FileWriter file = new FileWriter(msg, append); file.write(tofile); file.close(); }//writeFile }// I'm stuck on what can be the best way to given an adjacency list representation of the graph how to apply it Depth-first search algorithm. Any idea of how to aproach to complete the task?

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  • Deploying Django App with Nginx, Apache, mod_wsgi

    - by JCWong
    I have a django app which can run locally using the standard development environment. I want to now move this to EC2 for production. The django documentation suggests running with apache and mod_wsgi, and using nginx for loading static files. I am running Ubuntu 12.04 on an Ec2 box. My Django app, "ddt", contains a subdirectory "apache" with ddt.wsgi import os, sys apache_configuration= os.path.dirname(__file__) project = os.path.dirname(apache_configuration) workspace = os.path.dirname(project) sys.path.append(workspace) sys.path.append('/usr/lib/python2.7/site-packages/django/') sys.path.append('/home/jeffrey/www/ddt/') os.environ['DJANGO_SETTINGS_MODULE'] = 'ddt.settings' import django.core.handlers.wsgi application = django.core.handlers.wsgi.WSGIHandler() I have mod_wsgi installed from apt. My apache/httpd.conf contains NameVirtualHost *:8080 WSGIScriptAlias / /home/jeffrey/www/ddt/apache/ddt.wsgi WSGIPythonPath /home/jeffrey/www/ddt <Directory /home/jeffrey/www/ddt/apache/> <Files ddt.wsgi> Order deny,allow Allow from all </Files> </Directory> Under apache2/sites-enabled <VirtualHost *:8080> ServerName www.mysite.com ServerAlias mysite.com <Directory /home/jeffrey/www/ddt/apache/> Order deny,allow Allow from all </Directory> LogLevel warn ErrorLog /home/jeffrey/www/ddt/logs/apache_error.log CustomLog /home/jeffrey/www/ddt/logs/apache_access.log combined WSGIDaemonProcess datadriventrading.com user=www-data group=www-data threads=25 WSGIProcessGroup datadriventrading.com WSGIScriptAlias / /home/jeffrey/www/ddt/apache/ddt.wsgi </VirtualHost> If I am correct, these 3 files above should correctly allow my django app to run on port 8080. I have the following nginx/proxy.conf file proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; Under nginx/sites-enabled server { listen 80; server_name www.mysite.com mysite.com; access_log /home/jeffrey/www/ddt/logs/nginx_access.log; error_log /home/jeffrey/www/ddt/logs/nginx_error.log; location / { proxy_pass http://127.0.0.1:8080; include /etc/nginx/proxy.conf; } location /media/ { root /home/jeffrey/www/ddt/; } } If I am correct these two files should setup nginx to take requests on the HTTP port 80, but then direct requests to apache which is running the django app on port 8080. If i go to mysite.com, all I see is Welcome to Nginx! Any advice for how to debug this?

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  • One server running Django (with Nginx and Apache) and Wordpress Blog

    - by JCWong
    I have nginx listening to port 80 for my primary site foo.com. It proxys to port 8080 which is where the Django app lives server { listen 80; server_name www.foo.com foo.com; access_log /home/jeffrey/www/ddt/logs/nginx_access.log; error_log /home/jeffrey/www/ddt/logs/nginx_error.log; location / { proxy_pass http://127.0.0.1:8080; include /etc/nginx/proxy.conf; } location /media/ { root /home/jeffrey/www/ddt/; } location /static/ { root /home/jeffrey/www/ddt/; } location /public/ { root /home/jeffrey/www/ddt/; } } I'd like to have a wordpress blog run on the same server. Apache is listening to port 8080 with this http.conf file NameVirtualHost *:8080 WSGIScriptAlias / /home/jeffrey/www/ddt/apache/ddt.wsgi WSGIPythonPath /home/jeffrey/www/ddt <Directory /home/jeffrey/www/ddt/apache/> <Files ddt.wsgi> Order deny,allow Allow from all </Files> </Directory> I added my Wordpress site using a virtualhost <VirtualHost *:8080> ServerName www.bar.com ServerAlias bar.com DocumentRoot /home/jeffrey/www/jeffrey_wp </VirtualHost> When I go to bar.com I still see my django app. Is it possible for these two sites to run on the same server?

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  • How do I make my USB Bluetooth dongle work in Ubuntu 11.04 ? (Can't init device hci0: Connection timed out (110)) [closed]

    - by MaikoID
    I've a USB bluetooth dongle root@maiko-cce-lin:~# lsusb | grep Bluetooth Bus 001 Device 007: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode) that isn't working properly, hardly-ever it works but stops working in my next reboot. what I've tried it isn't software blocked root@maiko-cce-lin:~# rfkill list 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 1: hci0: Bluetooth Soft blocked: no Hard blocked: no my device is recognized by hciconfig root@maiko-cce-lin:~# hciconfig -a hci0: Type: BR/EDR Bus: USB BD Address: 00:1F:81:00:01:1C ACL MTU: 1021:4 SCO MTU: 180:1 DOWN RX bytes:330 acl:0 sco:0 events:8 errors:0 TX bytes:24 acl:0 sco:0 commands:30 errors:22 Features: 0xff 0x3e 0x09 0x76 0x80 0x01 0x00 0x80 Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 Link policy: Link mode: SLAVE ACCEPT but I can't turn on my hci interface root@maiko-cce-lin:~# hciconfig hci up Can't init device hci0: Connection timed out (110) I don't understand why.. the hcitool command doesn't show any device. root@maiko-cce-lin:~# hcitool dev Devices: I've tried to restart my bluetooth service too with this command and make all these previous commands again but without success. root@maiko-cce-lin:~# service bluetooth restart * Stopping bluetooth [ OK ] * Starting bluetooth [ OK ] root@maiko-cce-lin:~# The dongle works if you disconnect it from usb, wait a few seconds and connect it again. so there must be better solution for it ( a solution not involving physically removing the dongle!)

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  • SSH port forwarding through Windows machine

    - by Leonardo Ramé
    is it possible to connect to an SSH server only accessible from inside a network, using a Windows machine without SSH as a gateway?. Let me clarify my question with a sketch: Me (Linux machine)--- WIN (Windows without SSHD)---LIN (Linux with SSHD). Machine Me, is the PC I'm using to connect to LIN through WIN. WIN is accessible from the outside, it has an RDESKTOP port open, and LIN is only accessible from inside the network. Hope you understand the question.

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  • How can I get Ubuntu 12.04 to boot on a Gigabyte 990Fx MB (efi problem?)

    - by Jeffrey
    I am trying to install Ubuntu 12.04 on a home made system with a gigabyte 990Fxa MB. I can make it through the install process. It does not boot. Windows 7 does boot on the same machine. Suse 11.4 boots on the same machine. Suse 12.4 does not boot. I think there may be an issue with the EFI / GPT system. I know very little about these systems. I really expected the machine to boot. What can I do to get the system to boot? Please direct me to a path to trouble shoot this problem. thanks Jeffrey

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  • What is the relation between database books by Ullman et al.?

    - by macias
    A First Course in Database Systems by Jeffrey D. Ullman, Jennifer Widom (Amazon links) Database System Implementation by Hector Garcia-Molina, Jeffrey D. Ullman, Jennifer D. Widom Database Systems: The Complete Book by Hector Garcia-Molina, Jeffrey D. Ullman, Jennifer Widom As far as I know the second one is the second "part" of the first one. But what about the third one -- is it just first+second published in one volume? I would like to buy them, but I don't want to get redundant reading. Thank you in advance for clarification.

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  • Oracle at ASMC PDI 2012

    - by jeffrey.waterman
    Recently, I had the pleasure of representing Oracle at the American Society of Military Comptrollers National Professional Development Institute (PDI).  The PDI is the premier training event for resource managers in the Department of Defense and US Coast Guard.  Each year they assemble top presenters and key note speakers to convey their experiences and share the upcoming goals and vision for the Defense Department's financial and resource management community.  This year, the common themes were centered around 'auditability' and 'efficiency'.   What is auditability?  There were many definitions/themes tossed around, but to summarize my notes, it boiled down to:- the proper tracking of funds- audit readiness- proper controls- proper documentation There were sessions regarding entire programs focused on the need for auditability.  For example, FIAR: Financial Improvement and Audit Readiness (http://comptroller.defense.gov/fiar/index.html)   The FIAR stresses the "...improve(ment of) the Department's financial processes, controls and information." The entire conference, one set of solutions kept popping into my head around, "how can Oracle's solutions assist the Department of Defense", or any other Federal Agency, improve their financial processes and controls?   One answer came to mind:  Oracle Governance, Risk, and Compliance Management. Commonly referred to as "GRC". Let me summarize the main components around Oracle's GRC solution: GRC Manager: This solution is the central repository for documenting business processes, policies, and established controls.  All identified risks and issues are documented within the repository as well as action plans necessary for mitigation. GRC Controls:  This solution consists of a set of tools which are embedded with your ERP (financial, human resource, supply chain, etc.) applications to detect, prevent, and/or enforce the policies and procedures established by your Agency.  Components of the solution include:- Application Access Control Governor: a robust tool for managing application roles and responsibilities; simplify segregation of duty maintenance- Configuration Controls Governor: complete audit trail for changes made to configurations- Transactions Control Governor: track violations of internal controls; alert management to suspicious activities; be warned when high dollar transactions are occurring on an irregular basis; - Preventative Controls Governor: prevent sensitive information from being viewed by unauthorized parties; enforce field, block, and form change control If you are in the financial or resource management community and are concerned about auditability within your organization I suggest you follow up this post by reading about Oracle's GRC solutions.  www.oracle.com/grc Please feel free to follow up with thought and questions in the comments section below.  Also, if you have a topic you would like addressed in this blog, just drop me a note at jeffrey[email protected]  or leave the suggestion in the comment section as well. Thank you for reading.

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  • Is Oracle Policy Automation a Fit for My Agency? I'll bet it is.

    - by jeffrey.waterman
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Recently, I stumbled upon a new(-ish) whitepaper now posted on the Oracle Technology Network around Oracle Policy Automation (OPA). This paper is certain to become a must read for any customer interested in rules automation. What is OPA?  If you are not sitting in your favorite Greek restaurant waiting for that order of Saganaki to appear, OPA is Oracle’s solution for automated streamlining, standardizing, and the maintenance of policy. It is a specialized rules platform that simplifies the automation of rules and policies, putting the analysis in the hands of the analysts, not the IT organization. In other words, OPA allows the organization to be more efficient by eliminating (or at a minimum, reducing the engagement of) the middle man from the process. The whitepaper I mention above is titled, “Is Oracle Policy Automation a Good Fit for My Business?”. This short document walks the reader through use cases and advice for the reader to consider when deciding if OPA is right for their agency. The paper outlines many different scenarios, different uses of OPA in production today and, where OPA may not be a good fit. Many of the use case examples revolve around end user questionnaires or analyst research. What is often overlooked is OPA’s ability to act as a rules engine behind the scenes. That is, take inputs from one source (e.g., personnel data), process that data in OPA and send the output (e.g., pay data with benefits deductions) to a second source. The rules have been automated, no necessary human intervention to perform analysis. A few of my customers have used the embedded OPA solution to improve transaction processing and reduce the time spent analyzing exceptions. I suggest any reader whose organization is reliant on or deals with high complexity, volume or volatility in rules that are based on documentation – or which need to be documented – take a look at Oracle Policy Automation. You can find the white paper on Oracle Technology Network. You can find the white paper in the Oracle Policy Automation of the OTN. You can find more information around OPA on oracle.com. Finally, you can send me a question any time at jeffrey[email protected] Thank you for reading. If you have any topics around Oracle Applications in the Federal or Public Sector industries you would like to see addressed in this blog, please leave suggestions in the comments section and I will do my best to address in a future post.

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  • MySQL Linked Server and SQL Server 2008 Express Performance

    - by Jeffrey
    Hi All, I am currently trying to setup a MySQL Linked Server via SQL Server 2008 Express. I have tried two methods, creating a DSN using the mySQL 5.1 ODBC driver, and using Cherry Software OLE DB Driver as well. The method that I prefer would be using the ODBC driver, but both run horrendously slow (doing one simple join takes about 5 min). Is there any way I can get better performance? We are trying to cross query between multiple mySQL databases on different servers, and this seems to be method we think would work well. Any comments, suggestions, etc... would be greatly appreciated. Regards, Jeffrey

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  • How to Extract data asocaited with attribute of XML file using python 3.2

    - by user1460383
    I have this xml format..... <event timestamp="0.447463" bustype="LIN" channel="LIN 1"> <col name="Time"/> <col name="Start of Frame">0.440708</col> <col name="Channel">LIN 1</col> <col name="Dir">Tx</col> <col name="Event Type">LIN Frame (Diagnostic Request)</col> <col name="Frame Name">MasterReq_DB</col> <col name="Id">3C</col> <col name="Data">81 06 04 04 FF FF 50 4C</col> <col name="Publisher">TestMaster (simulated)</col> <col name="Checksum">D3 &quot;Classic&quot;</col> <col name="Header Duration">2.090 ms (40.1 bits)</col> <col name="Resp. Duration">4.688 ms (90.0 bits)</col> <col name="Time difference">0.049987</col> <empty/> </event> In above xml, i need to extract data associated with attribute 'name' Am able to get all names but am unable to fetch MasterReq_DB< field Please help me ... Thanks in advance

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  • Good Customer Service Example

    - by MightyZot
    Here’s another good customer service example for you! My wife purchased a Galaxy last week and she loves the phone.  She asked me to add it to our AT&T Microcell last night. I purchased the AT&T Microcell a couple of years ago, because cell signal out where I live sucks! Since microcells are managed on the AT&T web site, I went to the site and tried to sign in. Naturally, having not managed that microcell in a couple of years…and much to my chagrin…I discovered that I didn’t know my password OR my user ID. So, I decided to call and see if I could get my account reset that late in the day (we’re talking last night, so it was well after 7pm.) I called the technical support line, touched the appropriate numbers to navigate to microcell support, turned on my speaker phone, and prepared for the long wait. After about 45 seconds I was delighted to hear “Jeffrey” break in and ask what he could help me with. I explained that I have not managed my microcell for some time and had forgotten the user name and password.  “No problem”, he replied, and he asked me for the line I used to register the microcell. After confirming the last four digits of my IMEI number, he asked me for my wife’s number. I gave him my wife’s number and he said, “I’ve taken care of it Mr Pope. Just have her reboot her phone and you should see your microcell.” We rebooted her phone, it connected to the microcell, and voila, she was online! “Is there anything else I can help you with while I’ve got you on the line”, he said. “Nope”, I replied. “Ok, have a great night.” What made this a great customer service experience for me was that “Jeffrey” didn’t stop at giving me my user account and password, which I would probably forget anyway after setting up my wife’s new phone. Instead, he solved the real problem for me – adding my wife’s new phone to my microcell. Great job Jeffrey!

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  • Cannot connect to MySQL Server on RHEL 5.7

    - by Jeffrey Wong
    I have a standard MySQL Server running on Red hat 5.7. I have edited /etc/my.cnf to specify the bind address as my server's public IP address. [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql # Default to using old password format for compatibility with mysql 3.x # clients (those using the mysqlclient10 compatibility package). old_passwords=1 # Disabling symbolic-links is recommended to prevent assorted security risks ; # to do so, uncomment this line: # symbolic-links=0 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid bind-address=171.67.88.25 port=3306 And I have also restarted my firewall sudo /sbin/iptables -A INPUT -i eth0 -p tcp --destination-port 3306 -j ACCEPT /sbin/service iptables save The network administrator has already opened port 3306 for this box. When connecting from a remote computer (running Ubuntu 10.10, server is running RHEL 5.7), I issue mysql -u jeffrey -p --host=171.67.88.25 --port=3306 --socket=/var/lib/mysql/mysql.sock but receive a ERROR 2003 (HY000): Can't connect to MySQL server on '171.67.88.25' (113). I've noticed that the socket file /var/lib/mysql/mysql.sock is blank. Should this be the case? UPDATE The result of netstat -an | grep 3306 tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN Result of sudo netstat -tulpen Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name tcp 0 0 127.0.0.1:2208 0.0.0.0:* LISTEN 0 7602 3168/hpiod tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 27 7827 3298/mysqld tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 0 5110 2802/portmap tcp 0 0 0.0.0.0:8787 0.0.0.0:* LISTEN 0 8431 3326/rserver tcp 0 0 0.0.0.0:915 0.0.0.0:* LISTEN 0 5312 2853/rpc.statd tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 0 7655 3188/sshd tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 0 7688 3199/cupsd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 0 8025 3362/sendmail: acce tcp 0 0 127.0.0.1:2207 0.0.0.0:* LISTEN 0 7620 3173/python udp 0 0 0.0.0.0:909 0.0.0.0:* 0 5300 2853/rpc.statd udp 0 0 0.0.0.0:912 0.0.0.0:* 0 5309 2853/rpc.statd udp 0 0 0.0.0.0:68 0.0.0.0:* 0 4800 2598/dhclient udp 0 0 0.0.0.0:36177 0.0.0.0:* 70 8314 3476/avahi-daemon: udp 0 0 0.0.0.0:5353 0.0.0.0:* 70 8313 3476/avahi-daemon: udp 0 0 0.0.0.0:111 0.0.0.0:* 0 5109 2802/portmap udp 0 0 0.0.0.0:631 0.0.0.0:* 0 7691 3199/cupsd Result of sudo /sbin/iptables -L -v -n Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 6373 2110K RH-Firewall-1-INPUT all -- * * 0.0.0.0/0 0.0.0.0/0 Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 RH-Firewall-1-INPUT all -- * * 0.0.0.0/0 0.0.0.0/0 Chain OUTPUT (policy ACCEPT 1241 packets, 932K bytes) pkts bytes target prot opt in out source destination Chain RH-Firewall-1-INPUT (2 references) pkts bytes target prot opt in out source destination 572 861K ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 1 28 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 255 0 0 ACCEPT esp -- * * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT ah -- * * 0.0.0.0/0 0.0.0.0/0 46 6457 ACCEPT udp -- * * 0.0.0.0/0 224.0.0.251 udp dpt:5353 0 0 ACCEPT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpt:631 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:631 782 157K ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 2 120 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:443 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:23 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:80 4970 1086K REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Result of nmap -P0 -p3306 171.67.88.25 Host is up (0.027s latency). PORT STATE SERVICE 3306/tcp filtered mysql Nmap done: 1 IP address (1 host up) scanned in 0.09 seconds Solution When everything else fails, go GUI! system-config-securitylevel and add port 3306. All done!

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  • How to detect non-graceful disconnect of Twisted on Linux?

    - by Victor Lin
    I wrote a server based on Twisted, and I encountered a problem, some of the clients are disconnected not gracefully. For example, the user pulls out the network cable. For a while, the client on Windows is disconnected (the connectionLost is called, and it is also written in Twisted). And on the Linux server side, my connectionLost of twisted is never triggered. Even it try to writes data to client, but the connection is lost. Why Twisted can't detect those non-graceful disconnection (even write data to client) on Linux? How to makes Twisted detect non-graceful disconnections? Because the feature Twisted can't detect non-graceful, I have lots of zombie user on my server. Thanks. Victor Lin.

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  • Cutting Paper through Visualization and Collaboration

    - by [email protected]
    It's hard not to hear about "Going Green" these days. Many are working to be more environmentally conscious in their personal lives, and this has extended to the corporate world as well. I know I'm always looking for new ways. Environmental responsibility is important at Oracle too, and we have an entire section of our website dedicated to our solutions around the Eco-Enterprise. You can check it out here: http://www.oracle.com/green/index.html Perhaps the biggest and most obvious challenge in the world of business is the fact that we use so much paper. There are many good reasons why we print today too. For example: Printing off a document, spreadsheet, or CAD design that will be reviewed and marked up while on a plane Having a printout of a facility when a field engineer performs on-site maintenance During a multi-party design review where a number of people will review a drawing in a meeting room, scribbling onto a large scale drawing print to provide their collaborative comments These are just a few potential use cases, and they're valid ones. However, there's a way in which you can turn these paper processes into digital ones. AutoVue allows you to view, mark-up, and collaborate on all the data you would print. Indeed, this is the core of what AutoVue does. So if we take the examples above, we could address each as follows: Allow you to view the document, spreadsheet, or CAD drawing in AutoVue on your laptop. Even if you originally had this data vaulted in some time of system of record (like an ECM solution) and view your data from there, AutoVue allows you to "Work Offline" and take the documents you need to review on your laptop. From there, the many annotation tools in AutoVue will give you what you need to comment upon the documents that you are reviewing. The challenge with the mobile workforce is always access to information. People who perform maintenance and repair operations often are in locations with little to no Internet connectivity. However, technology is coming to these people in the form of laptops, tablet PCs, and other portable devices too. AutoVue can address situations with limited bandwidth through our streaming technology for viewing, meaning that the most up to date information can be pulled up from the central server - without the need for large data transfer. When there is no connectivity at all, the "Work Offline" option will handle this. For a design review session, the Real-Time Collaboration capabilities of AutoVue will let all the participants view the same document in a synchronized view, allowing each person to be able to mark-up the document at the same time. Since this is done in a web-based manner, not only is it not necessary to print the document, but you benefit by reducing the travel needed for these sessions. Not only are trees spared, but jet fuel as well. There are many steps involved with "Going Green", but each step is a necessary one. What we do today will directly influence our future generations, and we're looking to help.

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  • Open World 2012

    - by jeffrey.waterman
    For those of you fortunate enough to be attending this year's Oracle OpenWorld here is a sessions I recommend carving time out of your hectic schedule to attend: Public Sector General Session (session ID#: GEN8536) Wednesday, October 3, 10:15 a.m.–11:15 a.m., Westin San Francisco, Metropolitan III Room Speakers, Mark Johnson, SVP Oracle Public Sector; Peter Doolan, CTO Oracle Public Sector; Robert Livingston, founding partner of Livingston Group and former member of the US Congress. Join Mark Johnson for an update on Oracle in government. Mark will be joined by Peter Doolan and Robert Livingston to discuss current topics facing governments and how Oracle can help organizations achieve their goals. I'll be posting more interesting sessions as I peruse the conference agenda over the next week or so.  If you see an interesting session, please feel free to share your suggestions in the comments section.

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  • Introducing the Oracle Parcel Service&ndash;Example/Reference Application

    - by Jeffrey West
    Over the last few weeks the product management team has been working on a webcast series that is airing in EMEA.  It is a 5-episode series where we talk about different features of WebLogic and show how to build applications that take advantage of these features.  Each session is focused at a different layer of the technology stack, and you can find the schedule below. The application we are building in this series is named the ‘Oracle Parcel Service’.  It is an example application and not a product of Oracle by any stretch of the imagination.  Over the next few weeks we will be finalizing the code and will be releasing it for you to check out.  For updates, request membership to the Oracle Parcel Service project on SampleCode.oracle.com: https://www.samplecode.oracle.com/sf/projects/oracle-parcel-svc/. Here are some of the key features that we are highlighting: JPA 2.0 (new in WebLogic 10.3.4) with EclipseLink Coherence TopLink Grid Level 2 cache for JPA JAX-RS (new in WebLogic 10.3.4) 1.0 for RESTful services Lightweight JQuery Web UI for consuming RESTful services JSF 2.0 (new in WebLogic 10.3.4) utilizing PrimeFaces EJB 3.0 Spring-WS Web Services JAX-WS Web Services Spring MDP’s for Event Driven Architectures Java MDB’s for Event Driven Architectures Partitioned Distributed Topics for Event Driven Architectures   Accessing the Code on SampleCode.Oracle.com You will need to log in using your Oracle.com username and password.  If you have not created an account, you will need to do so.  It’s a simple one-page form and we don’t bother you with too many emails.   Please join the project to be kept up to date on changes to the code and new projects.  Joining the project is not required, but very much appreciated. Once you have signed in you should see an icon for accessing the Source Code via Subversion.  You can also download a zip file containing the code.

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  • How often are comments used in XML documents?

    - by Jeffrey Sweeney
    I'm currently developing a web-based XML managing program for a client (though I may 'market' it for future clients). Currently, it reads an XML document, converts it into manageable Javascript objects, and ultimately spits out indented, easy to read XML code. Edit: The program would be used by clients that don't feel like learning XML to add items or tags, but I (or another XML developer) may use the raw data for quick changes without using an editor. I feel like fundamentally, its ready for release, but I'm wondering if I should go the extra mile and allow support for remembering (and perhaps making) comments before generating the resulting XML. Considering that these XML files will probably never be read without a program interpreting it, should I really bother adding support for comments? I'll probably be the only one looking at raw files, and I usually don't use comments for XML anyway. So, are comments common/important in most XML documents?

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  • OracleWebLogic YouTube Channel

    - by Jeffrey West
      The WebLogic Product Management Team has been working on content for an Oracle WebLogic YouTube channel to host demos and overview of WebLogic features.  The goal is to provide short educational overviews and demos of new, useful, or 'hidden gem' WLS features that may be underutilized.    We currently have 26 videos including: Coherence Server Lifecycle Management with WebLogic Server (James Bayer) WebLogic Server JRockit Mission Control Experimental Plugin (James Bayer) WebLogic Server Virtual Edition Overview and Deployment Oracle Virtual Assembly Builder (Mark Prichard) Migrating Applications from OC4J 10g to WebLogic Server with Smart Upgrade (Mark Prichard) WebLogic Server Java EE 6 Web Profile Demo (Steve Button) WebLogic Server with Maven and Eclipse (Steve Button) Advanced JMS Features: Store and Forward, Unit of Order and Unit of Work (Jeff West) WebLogic Scripting Tool (WLST) Recording, editing and Playback (Jeff West) Special thanks to Steve, Mark and James for creating quality content to help educate our community and promote WebLogic Server!  The Product Management Team will be making ongoing updates to the content.  We really do want people to give us feedback on what they want to see with regard to WebLogic.  Whether its how you achieve a certain architectural goal with WLS or a demonstration and sample code for a feature - All requests related to WLS are welcome! You can find the channel here: http://www.YouTube.com/OracleWebLogic.  Please comment on the Channel or our WebLogic Server blog to let us know what you think.  Thanks!

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