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• MySQL replication hung after slave goes offline and comes back online again

  - by Ed Manet

  I have a master server and several slave servers replicating a single database. I am using in MySQL 5.0 in SLES 11. During fault tolerance testing I found that when the slave's network connection is broken (cable un-plugged) and then restored, replication hangs. It shows no errors and the slave appears to be running but the Read_Master_Log_Pos and Exec_Master_Log_Pos values do not match the log postion on the master server. The Slave_IO_State is "Waiting for master to send event". The Slave_IO_Running and Slave_SQL_Running values are both are "Yes". The Master_Log_File and Relay_Master_Log_File match. If I stop and start the slave or restart the mysql daemon, replication starts working again. Any ideas on what I can do about this?

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• Is there an Outlook or Gmail plugin to manage multiple tasks in an email?

  - by Matthew Lock

  I often get client emails containing 10 or more tasks written as text in the email. I know Outlook and Gmail let you turn an email into a single task, but this doesn't help too much when there are 10 tasks in that email. Are there any plugins for Outlook or Gmail that let put checkboxes into the email or something so I can check off each item as they are done? Ideally I'd like the checkboxes/to do items to be inside the email itself so I can see my progress by looking at the email, rather than just letting me copy text from the email into some other task list.

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• The Active Directory integrated DNS zone _msdcs.COMPANY.LOCAL was not found.

  - by MadBoy

  Recently we renamed our domain from single domain name COMPANY to COMPANY.LOCAL due to multiple problems. However now I get this information from BPA. Issue: The Active Directory integrated DNS zone _msdcs.COMPANY.LOCAL was not found. Impact: DNS queries for the Active Directory integrated zone _msdcs.COMPANY.LOCAL might fail. Resolution: Restore the Active Directory integrated DNS zone _msdcs.COMPANY.LOCAL. Clearly there is no _msdcs.COMPANY.LOCAL as there is only old one _msdcs.COMPANY however when i check under COMPANY there is no _msdsc, but there is one when i check inside COMPANY.LOCAL. So it seems to me that _msdcs.COMPANY.LOCAL should use the one that is inside COMPANY.LOCAL? Should it not? Should I try to recreate it by hand (since it wasn't created on domain rename).

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• How would I add a second physical hard drive to proxmox

  - by Cygnus X

  I installed proxmox on a single 250GB hard drive and I would like to add a second identical hard drive to put more VM's on. I already tried once, and didn't get very far. I added it and formatted it as an ext4, but when I went to use the disk, it said only 8GB was available. That's not quite right. So I did some searching and found that I had to make the device ID 8e for a linux lvm. After I did this, it said I had to restart, so I did... and it wouldn't boot!!! What did I do wrong? And how do I do it right? (I know I could throw in a RAID card and do a RAID 0, but I'd rather not).

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• Oracle Access Manager 11g - useful links

  - by Dmitry Nefedkin

  The main idea of this post is to collect in a single place the links to the most useful resources for everybody who are interested in Oracle Access Manager 11g.   If you have something valuable to add to this list - just let me know. Official documentation (Oracle Fusion Middleware 11.1.1.5): Administrator's Guide for Oracle Access Manager with Oracle Security Token Service - main guide for the  OAM 11g  administrator/consultant; Integration Guide for Oracle Access Manager - if you're in charge for setting up OAM integration with OIM, OAAM or OIF - that's a guide for you. Also has a chapter on WNA integration; Developer's Guide for Oracle Access Manager and Oracle Security Token Service - learn how to use Java Access JDK and develop custom authentication plugins; Oracle Fusion Middleware High Availability Guide, paragraph 8.8 Oracle Access Manager High Availability - set up HA for your OAM installation; Oracle Fusion Middleware Enterprise Deployment Guide for Oracle Identity Management - learn the best practices of the real-world enterprise deployments.   Useful Oracle Support documents (go to support.oracle.com to retrieve the contents of the documents): OAM Bundle Patch Release History [ID 736372.1] Install and Configure Advisor: Oracle Fusion Middleware (FMW) Identity Access Management (OAM, OIM) 11g [ID 340.1] Procedure to Upgrade OAM 11.1.1.3.0 to OAM 11.1.1.5.0 [ID 1318524.1] OAM 11g: How to Enable Oracle Access Manager 11g Server Trace / Debug Logging [ID 1298296.1] OAM 11g: How To Create and Configure Policies For Application Resources Without Using OAM Console UI [ID 1393918.1] How To Configure X509 Authentication On Oracle Access Manager (OAM) 11g [ID 1368211.1] OAM 11g WNA Step by Step Setup Guide [ID 1416860.1]   Blogs: Oracle Access Manager Academy from the Fusion Security Blog OAM Product management blog Oracle IDM blog Books:  Oracle Identity and Access Manager 11g for Administrators

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• Executing local script/command on remote server

  - by Ian McGrath

  I have a command that I want to run on machine B from machine A. If I run the command on machine B locally, it works fine. Here is the command: for n in `find /data1/ -name 'ini*.ext'` ; do echo cp $n "`dirname $n `/` basename $n .ext`"; done From machine A, I issue this command ssh user@machineB for n in `find /data1/ -name 'ini*jsem'` ; do echo cp $n "`dirname $n `/` basename $n .jsem`"; done But I get error syntax error near unexpected token do What is wrong? I think it has something to do with double quotes, single quotes, semi colon because executing command ssh user@machineB ls works fine. So not issue of authentication or something else. Thanks

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• Batch convert HTML file(s) saved using IE to MHT

  - by ultrasawblade

  I have numerous web sites that I've saved over the years. I used Internet Explorer's "Save As..." option to do this. It saves the original page as an .html document, and page requirements in a linked folder with the same name as a document. I want to convert a bunch of these (over 1000) to the single-file .mht format. This can be done through Internet Explorer or Firefox (using UnMHT extension) by loading the original .html document, then re-saving as an .mht document. It is tedious to do that for the number of files I'm talking about, obviously. I'm wondering if anyone knows of a utility, command line or otherwise, that can accomplish this.

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• Disable Memory Modules In BIOS for Testing Purposes (Optimize Nehalem/Gulftown Memory Performance)

  - by Bob

  I recently acquired an HP Z800 with two Intel Xeon X5650 (Gulftown) 6 core processors. The person that configured the system chose 16GB (8 x 2GB DDR3-1333). I'm assuming this person was unaware these processors have 3 memory channels and to optimize memory performance one should choose memory in multiples of three. Based on this information, I have a question: By entering the BIOS, can I disable the bank on each processor that has the single memory module? If so, will this have any adverse effects or behave differently than physically removing the modules? I ask due to the fact that I prefer to store the extra memory in the system if it truly behaves as if the memory is not even there. Also, I see this as an opportunity to test 12GB vs. 16GB to see if there is a noticeable difference. Note: According to http://www.delltechcenter.com/page/04-08-2009+-+Nehalem+and+Memory+Configurations?t=anon, the current configuration reduces the overall data transfer speed to 1066 and in addition, the memory bandwidth goes down by about 23%.

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• Setting up a vpn and IIS IP address restrictions

  - by carpat

  I'm trying to get a VPN set up with internal access only sites. I have set up a VPN on a windows server (single VPS server), and I can connect from a remote computer and I get an IP assigned correctly (from 192.168.1.1 - 255) Next I configured IIS (running on the same machine) IP Address and Domain Restrictions to only allow only IP address range 192.168.1.0 with subnet mask 255.255.255.0 When I connect to the VPN with "Use Default Gateway on Remote Network" (so that requests must go through the vpn), I get a 403 from the internal sites. What did I miss?

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• What is the best memory supported by Asus Rampage Formula (1) motherboard

  - by James

  I'm rebuilding a PC from old components I have and I want to know what are the best ram sticks for the Asus Rampage Formula (The first motherboard in the Rampage Formula range) According to the Asus website (HERE) the maximum supported memory is 8GB but when I search through the memory compatibility list there's nothing above 2046mb and the motherboard only supports single or dual-channel memory. Can anyone point me in the direction of a more comprehensive list of compatible memory? Or does anyone know where I can ask about memory compatibility? Note: As far as I know, this model motherboard is no longer in production.

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• Importing multiline cells from csv file into excel

  - by Unreason

  I have a csv file (comma delimited and quoted). When csv file is opened directly from explorer excel correctly interprets the cells that are mutliline, but it messes up the character encoding (utf-8). Therefore I have to use import function (Data/Get External Data/From Text). However, when I use import text function in excel (where I can set file encoding explicitly) it interprets the newline as start of the new row instead of putting multiline text into a single cell and breaks the file layout. Can I somehow overcome the situation by either forcing the explorer open command to use 65001: Unicode (UTF-8) encoding forcing the Text Import Wizard to ignore quoted line breaks as record delimiters

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• How do you KISS ?

  - by Conor

  The KISS principal is a highly quoted design mantra. The aim of this principle is to stamp out unnecessary complexity on a project. This is a good thing, saving time, energy and money. It can lead to a relatively stress free implementation and a simple, elegant, maintainable end product. A lot of discussion on KISS provides mechanisms to simplify requirements, design and implementation. Things that spring to mind include: avoid scope creep; simple obvious design and code; minimal run-time dependencies; refactoring to maintain simplicity; etc. However there are a lot of implicit things that we do to KISS. Examples: small team sizes; minimal management layers; tidy desk; mastery of a single IDE; clear concise error messages; scripts to automate/encapsulate tasks; etc The purpose of this question is to derive a checklist of KISS items. I'm especially interested in non-obvious items.

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• MSSQL instance shuts down

  - by citronas

  I'm currently developing a new ASP.net project hosted on a Windows Server 2008 RC2 with an MSSQL 2008 Express Database. I have three SQL instances (for different purposes) running which currently all contain a single database. For apprently no reason, these instances tend to shut down after some days, for no apparent reason. There might be low or none traffic to these instances, because there might be some days in a row, where I can't develop. It now occured several times, that one or two of these three instances just shut down, so that I can't access the database, without manually starting the instance. I can't seem to find a event log entry for the shutdown, which is most likely because I just enabled logging (why is the default setting off?) So the questions are: * Why does a SQL instance shut down? (Is there such thing as a "Shut down instance after 3 days of inactivity"? * How can I achieve that the instances are running 24/7?

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• Memcached server: Is it a good practice to point two server urls to the same server?

  - by Niro

  I have a system where there are connections to a memcache server from several different files and servers. I would like to stay with one server but keep the option of increasing the number of memcache servers (for periods of of high traffic). My idea is to tell memcache there are two servers, while the two urls will point (by DNS) to a single server. In the future if I want I can add a server and change DNS without changing the code in many places. Is this a good practice? Is there a performance cost to the fact that there are two server connections but they both point to the same server? Any other idea how to achive instant expeandability of memcache capacity without need to change the code and deploy ?

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• What are your suggestions on learning how to think?

  - by Jonathan Khoo

  First of all, this is not the generic 'make me a better programmer' question, even though the outcome of asking this question might seem similar to it. On programmers.SE, I've read and seen these get closed here, here, here, here, and here. We all know there are a multitude of generic suggestions to hone your programming skills (e.g reading SO, reading recommended books, following blogs, getting involved in open-source projects, etc.). This is not what I'm after. I also acknowledge the active readership on this web site and am hoping it works in my favour by yielding some great answers. From reading correspondence here, there appears to be a vast number of experienced people who are working, or have worked, programming-related fields. And most of you can convey thoughts in an eloquent, concise manner. I've recently noticed the distinction between someone who's capable of programming and a programmer who can really think. I refuse to believe that in order to become great at programmer, we simply submit ourselves to a lifetime of sponge-like behaviour (i.e absorb everything related to our field by reading, listening, watching, etc.). I would even state that simply knowing every single programming concept that allows you to solve problem X faster than everyone around you, if you can't think, you're enormously limiting yourself - you're just a fast robot. I like to believe there's a whole other face of being a great programmer which is unrelated to how much you know about programming, but it is how well you can intertwine new concepts and apply them to your programming profession or hobby. I haven't seen anyone delve into, or address, this facet of the human mind and programming. (Yes, it's also possible that I haven't looked hard enough too - sorry if that's the case.) So for anyone who has spent any time thinking about what I've mentioned above - or maybe it's everyone here because I'm a little behind in my personal/professional development - what are your suggestions on learning how to think? Aside from the usual reading, what else have you done to be better than the other people in your/our field?

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• Lucene and .NET Part I

  - by javarg

  I’ve playing around with Lucene.NET and trying to get a feeling of what was required to develop and implement a full business application using it. As you would imagine, many things are required for you to implement a robust solution for indexing content and searching it afterwards. Lucene is a great and robust solution for indexing content. It offers fast and performance enhanced search engine library available in Java and .NET. You will want to use this library in many particular scenarios: In Windows Azure, to support Full Text Search (a functionality not currently supported by SQL Azure) When storing files outside or not managed by your database (like in large document storage solutions that uses File System) When Full Text Search is not really what you need Lucene is more than a Full Text Search solution. It has several analyzers that let you process and search content in different ways (decomposing sentences, deriving words, removing articles, etc.). When deciding to implement indexing using Lucene, you will need to take into account the following: How content is to be indexed by Lucene and when. Using a service that runs after a specific interval Immediately when content changes When content is to available for searching / Availability of indexed content (as in real time content search) Immediately when content changes = near real time searching After a few minutes.. Ease of maintainability and development Some Technical Concerns.. When indexing content, indexes are locked for writing operations by the Index Writer. This means that Lucene is best designed to index content using single writer approach. When searching, Index Readers take a snapshot of indexes. This has the following implications: Setting up an index reader is a costly task. Your are not supposed to create one for each query or search. A good practice is to create readers and reuse them for several searches. The latter means that even when the content gets updated, you wont be able to see the changes. You will need to recycle the reader. In the second part of this post we will review some alternatives and design considerations.

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• Multiple urls to 1 website with a wild card ssl.

  - by dagda1

  Hi, At the moment, we have 27 single sites in IIS6, all with their own urls, all with the same subdomain, e.g. https://company1.mycompany.com https://company2.mycompany.com etc., etc. To further complicate things, there is 1 wild card certificate which deals with the subdomain *.mycompany.com and is assigned to each website. All these websites run under the same codebase. We want to consolidate all these websites into 1 website. Are there any issues with having a large number of host headers running under 1 IIS6 site or is there a better way of configuring the site? Thanks Paul

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• IIS7 URL Rewrite - Rewrite CSS files

  - by user1231958

  I'm trying to rewrite certain CSS files with some rules, so it replaces every single instance of links in the CSS (as in background: url("/myuri.jpg")) with a prefix (as in background: url("/zeus/myuri.jpg")) These are the rules. <rule name="ReverseProxyOutboundRule2" preCondition="IsCSS" enabled="true" stopProcessing="false"> <match filterByTags="None" pattern="url\(&quot;(.*)&quot;\)" /> <action type="Rewrite" value="url(&quot;/zeus{R:1}&quot;)" /> <conditions> <add input="{URL}" pattern="/zeus" /> </conditions> </rule> <preCondition name="IsCSS"> <add input="{RESPONSE_CONTENT_TYPE}" pattern="^text/css" /> </preCondition> However, only one url is being replaced this way and somehow the rest is being ignored. Thank you beforehand.

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• MySQL and User level logging

  - by Adraen

  I have been looking at logging only certain users activity in MySQL. I found that the logging could be enabled or disabled for all users but one of the service using the db does a lot of queries and therefore I would like to only log specific users. Google told me that a flag can be SET to enable disable logging, however, I cannot modify the service DB connection code and asking every single user to enable logging before they do anything might not be as reliable as I want. So, do you know if there is any way to log only a set of users queries ? Thanks !

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• Do Repeat Yourself in Unit Tests

  - by João Angelo

  Don’t get me wrong I’m a big supporter of the DRY (Don’t Repeat Yourself) Principle except however when it comes to unit tests. Why? Well, in my opinion a unit test should be a self-contained group of actions with the intent to test a very specific piece of code and should not depend on externals shared with other unit tests. In a typical unit test we can divide its code in two major groups: Preparation of preconditions for the code under test; Invocation of the code under test. It’s in the first group that you are tempted to refactor common code in several unit tests into helper methods that can then be called in each one of them. Another way to not duplicate code is to use the built-in infrastructure of some unit test frameworks such as SetUp/TearDown methods that automatically run before and after each unit test. I must admit that in the past I was guilty of both charges but what at first seemed a good idea since I was removing code duplication turnout to offer no added value and even complicate the process when a given test fails. We love unit tests because of their rapid feedback when something goes wrong. However, this feedback requires most of the times reading the code for the failed test. Given this, what do you prefer? To read a single method or wander through several methods like SetUp/TearDown and private common methods. I say it again, do repeat yourself in unit tests. It may feel wrong at first but I bet you won’t regret it later.

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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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• Simple recursive DNS resolver for debugging (app or VM)

  - by notpeter

  I have an issue which I believe is caused by incorrect DNS queries (doubled subdomains like _record.host.subdomain.tld.subdomain.tld) when querying for SRV records. So I need to an alternate DNS server with heavy logging so I can see every query (especially stupid ones), acting as a recursive resolver with the ability create records which override real DNS records so I can not only find the records it's (wrongly) looking for, but populate those records as well. I know I could install a DNS server on yet another linux box, but I feel like this is the sort of thing that someone may already setup a simple python script or single use vm just for this purpose.

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• I get a "could not create lock file" error when trying to run Postgres

  - by zermy

  I recently had to replace my postgresql.conf file, and I thought I got the settings right, but when I try to run Postgresql, I get this error: ESTFATAL: could not create lock file "/var/run/postgresql/.s.PGSQL.5432.lock": No such file or directory My workaround is to go as root and create a folder called postgresql in /var/run and then change the owner of the folder to postgres. The biggest problem is that I need to do this every single time my computer starts, the folder somehow deletes itself. I tried commenting out the external pid file bit in the conf file, but that didn't change anything.

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• Proper Use Of HTML Data Attributes

  - by VirtuosiMedia

  I'm writing several JavaScript plugins that are run automatically when the proper HTML markup is detected on the page. For example, when a tabs class is detected, the tabs plugin is loaded dynamically and it automatically applies the tab functionality. Any customization options for the JavaScript plugin are set via HTML5 data attributes, very similar to what Twitter's Bootstrap Framework does. The appeal to the above system is that, once you have it working, you don't have worry about manually instantiating plugins, you just write your HTML markup. This is especially nice if people who don't know JavaScript well (or at all) want to make use of your plugins, which is one of my goals. This setup has been working very well, but for some plugins, I'm finding that I need a more robust set of options. My choices seem to be having an element with many data-attributes or allowing for a single data-options attribute with a JSON options object as a value. Having a lot of attributes seems clunky and repetitive, but going the JSON route makes it slightly more complicated for novices and I'd like to avoid full-blown JavaScript in the attributes if I can. I'm not entirely sure which way is best. Is there a third option that I'm not considering? Are there any recommended best practices for this particular use case?

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• How do I access a shared folder using credentials other than the ones I logged in with?

  - by George Sealy

  I have a lab full of Windows 7 machines, and a shared login (user360) that all my students use. I also have a shared folder that they can all have read/write access to (for moving files around easily). My problem is that I also want to be able to create a shared folder for each student for submitting assignments. I can set up a shared folder with permissions for just a single user, and not the 'user360' account. The problem is, when I'm logged in as user360, and I try to open the 'StudentA', Windows never asks me for alternate credentials, it just refuses access because the user360 account is not allowed access. Can anyone suggest a fix for this?

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