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  • MySQL Connect Only 10 Days Away - Focus on InnoDB Sessions

    - by Bertrand Matthelié
    Time flies and MySQL Connect is only 10 days away! You can check out the full program here as well as in the September edition of the MySQL newsletter. Mat recently blogged about the MySQL Cluster sessions you’ll have the opportunity to attend, and below are those focused on InnoDB. Remember you can plan your schedule with Schedule Builder. Saturday, 1.00 pm, Room Golden Gate 3: 10 Things You Should Know About InnoDB—Calvin Sun, Oracle InnoDB is the default storage engine for Oracle’s MySQL as of MySQL Release 5.5. It provides the standard ACID-compliant transactions, row-level locking, multiversion concurrency control, and referential integrity. InnoDB also implements several innovative technologies to improve its performance and reliability. This presentation gives a brief history of InnoDB; its main features; and some recent enhancements for better performance, scalability, and availability. Saturday, 5.30 pm, Room Golden Gate 4: Demystified MySQL/InnoDB Performance Tuning—Dimitri Kravtchuk, Oracle This session covers performance tuning with MySQL and the InnoDB storage engine for MySQL and explains the main improvements made in MySQL Release 5.5 and Release 5.6. Which setting for which workload? Which value will be better for my system? How can I avoid potential bottlenecks from the beginning? Do I need a purge thread? Is it true that InnoDB doesn't need thread concurrency anymore? These and many other questions are asked by DBAs and developers. Things are changing quickly and constantly, and there is no “silver bullet.” But understanding the configuration setting’s impact is already a huge step in performance improvement. Bring your ideas and problems to share them with others—the discussion is open, just moderated by a speaker. Sunday, 10.15 am, Room Golden Gate 4: Better Availability with InnoDB Online Operations—Calvin Sun, Oracle Many top Web properties rely on Oracle’s MySQL as a critical piece of infrastructure for serving millions of users. Database availability has become increasingly important. One way to enhance availability is to give users full access to the database during data definition language (DDL) operations. The online DDL operations in recent MySQL releases offer users the flexibility to perform schema changes while having full access to the database—that is, with minimal delay of operations on a table and without rebuilding the entire table. These enhancements provide better responsiveness and availability in busy production environments. This session covers these improvements in the InnoDB storage engine for MySQL for online DDL operations such as add index, drop foreign key, and rename column. Sunday, 11.45 am, Room Golden Gate 7: Developing High-Throughput Services with NoSQL APIs to InnoDB and MySQL Cluster—Andrew Morgan and John Duncan, Oracle Ever-increasing performance demands of Web-based services have generated significant interest in providing NoSQL access methods to MySQL (MySQL Cluster and the InnoDB storage engine of MySQL), enabling users to maintain all the advantages of their existing relational databases while providing blazing-fast performance for simple queries. Get the best of both worlds: persistence; consistency; rich SQL queries; high availability; scalability; and simple, flexible APIs and schemas for agile development. This session describes the memcached connectors and examines some use cases for how MySQL and memcached fit together in application architectures. It does the same for the newest MySQL Cluster native connector, an easy-to-use, fully asynchronous connector for Node.js. Sunday, 1.15 pm, Room Golden Gate 4: InnoDB Performance Tuning—Inaam Rana, Oracle The InnoDB storage engine has always been highly efficient and includes many unique architectural elements to ensure high performance and scalability. In MySQL 5.5 and MySQL 5.6, InnoDB includes many new features that take better advantage of recent advances in operating systems and hardware platforms than previous releases did. This session describes unique InnoDB architectural elements for performance, new features, and how to tune InnoDB to achieve better performance. Sunday, 4.15 pm, Room Golden Gate 3: InnoDB Compression for OLTP—Nizameddin Ordulu, Facebook and Inaam Rana, Oracle Data compression is an important capability of the InnoDB storage engine for Oracle’s MySQL. Compressed tables reduce the size of the database on disk, resulting in fewer reads and writes and better throughput by reducing the I/O workload. Facebook pushes the limit of InnoDB compression and has made several enhancements to InnoDB, making this technology ready for online transaction processing (OLTP). In this session, you will learn the fundamentals of InnoDB compression. You will also learn the enhancements the Facebook team has made to improve InnoDB compression, such as reducing compression failures, not logging compressed page images, and allowing changes of compression level. Not registered yet? You can still save US$ 300 over the on-site fee – Register Now!

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  • Vacations on Rodrigues 2014

    And now something completely different compared to the usual technical or community related articles here on this blog. Yes, this time I'm writing some lines on my (and my family's) activities during our long weekend stay on Rodrigues. So, please bear with me, it's eventually a bit more personal... Grab a soda, some popcorn and a cosy place to continue to read. var googleAlbumLink = "https://plus.google.com/photos/117698191428446859536/albums/6047895311458281985"; //optional----------------------- var mySlideWidth = 580; var mySlideHeight = 340; var mySlideDelay = 7000; //delay in milliseconds Special promotions during school holidays Originally, our children started to ask more frequently about going on the plane again. Obviously, after their aunty from Germany was around during May, they were really eager to travel again. So, we decided that it might be a great opportunity to book some vacations during their school holidays. And just in time the local hotels and hotel groups started to advertise their special promotions for citizens and residents. After collecting multiple brochures over several days, we got attracted by various hotel packages on Rodrigues - most interestingly the expenses for the stay and flight ticket were less compared to other resorts here on the main island. As we have been to Rodrigues already back in 2008, we followed up on this idea and got in touch with a couple travel agencies. Well, I have to report that you should be really careful about the promotions from some of them. We had a very negative experience with Shamal Travel Agency in Quatre Bornes regarding their adverts and the actual price levels and age definition for children. Please, stay away from them if you are interested in transparent cost and services. Anyway, after some arrangements with two other close families we managed to confirm our stay at the Cotton Bay Hotel in Rodrigues. Given the fact that we already stayed there, and the hotel has been renovated recently, and it is under new management all looked very promising and relaxed for our vacation. Counting the days... As we already booked in July our children were counting down the days. And it got more interesting as soon as they were on school holidays finally. Well, the day arrived and waking them up at 2:30 hrs wasn't a problem after all. Quite the opposite it was fascinating for us parents to watch them waiting for the transport and later on during the airport transfer. Despite the early hours both didn't fall asleep and it was all so exciting. We are taking the plane! Well organised by the Cotton Bay Hotel Honestly, it was a breeze and a smooth ride during our stay at the hotel. From the airport transfer, the cleanliness of our bungalow, the organisation of our day trips, and the SPA - all very well and enjoyable. The children had great fun, and although it was a bit too windy to plunge into the pool they had a lot of fun with other activities on the beach and at the Kid's Club. Oh, and we had our private petting zoo with cows, sheep and goats just close to the terrace. Some of us went to check out the SPA facilities and I have to admit that the services regarding Hammam and Sauna are better than at some other hotels in Mauritius. I don't know after how many months or years I was once again enjoying a very hot sauna. Little draw-back but nothing to worry about... There is no cold water or at least ice cubes to cool down the body, but hey there was a nice breeze coming over the hills. Some day trips to mention Based on a friend's recommendation we walked to a "restaurant" called Chez Solange & Robert. Hahaha, restaurant is widely stretched in this case, as we enjoyed a great BBQ with fresh lobster, whole fish, and pieces of chicken breast in an open cottage. Just some wooden structure covered with dried palm leaves on the roof - island feeling pure! The other day we went to the Giant Tortoise & Cave Reserve Francois Leguat to observe the giant Aldabra turtles and to visit the Grande Caverne. The biggest limestone cave on the island. Compared to our last visit this was a novelty after checking out the Caverne Partate. The formations of stalactites and stalagmites are very impressive and imaginative. Our guide had lots of funny terms and despite the low light conditions the kids had a great time wandering around on the narrow wooden paths and stairs. And last but not least, we decided to check out the Tyrodrig zip lines... Everyone was allowed to join the trip through the air, and our little ones stayed close to our field guides. But finally went on their own on the very last traversal. Puuuh, it was astounishing to glide over the valley, and for sure something to repeat next time. Impressions of our vacation on Rodrigues 2014   Next stay has been discussed already Oh yes, Rodrigues baby! We are going to come again! Tentative dates have been discussed already and now it's up to us to earn enough our next holiday on that wonderful remote piece of paradise. Eventually, a little bit longer than this time. We'll see...

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  • Google Chrome: "The application failed to initialize properly"

    - by Zack Peterson
    Google Chrome stopped working for me today. When I launch Chrome, I see the following error: Windows - Application Error The application failed to initialize properly (0xc0000135). Click OK to terminate the application. It fails to load the New Tab Page. After a moment, I see the following error: Google Chrome The following page(s) have become unresponsive. You can wait for them to become responsive or kill them. My operating system is Microsoft Windows Vista. I've tried: uninstalled Chrome rebooted reinstalled Chrome rebooted That didn't fix it. What now? Any ideas?

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  • Tips on combining the right Art Assets with a 2D Skeleton and making it flexible

    - by DevilWithin
    I am on my first attempt to build a skeletal animation system for 2D side-scrollers, so I don't really have experience of what may appear in later stages. So i ask advice from anyone that been there and done that! My approach: I built a Tree structure, the root node is like the center-of-mass of the skeleton, allowing to apply global transformations to the skeleton. Then, i make the hierarchy of the bones, so when moving a leg, the foot also moves. (I also make a Joint, which connects two bones, for utility). I load animations to it from a simple key frame lerp, so it does smooth movement. I map the animation hierarchy to the skeleton, or a part of it, to see if the structure is alike, otherwise the animation doesnt start. I think this is pretty much a standard implementation for such a thing, even if i want to convert it to a Rag Doll on the fly.. Now to my question: Imagine a game like prototype, there is a skeleton animation of the main character, which can animate all meshes in the game that are rigged the same way.. That way the character can transform into anything without any extra code. That is pretty much what i want to do for a side-scroller, in theory it sounds easy, but I want to know if that will work well. If the different people will be decently animated when using the same skeleton-animation pair. I can see this working well with a Stickman, but what about actual humans? Will the perspective look right, or i will need to dynamically change the sprites attached to bones? What do you recommend for such a system?

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  • De-index URL parameters by value

    - by Doug Firr
    Upon reading over this question is lengthy so allow me to provide a one sentence summary: I need to get Google to de-index URLs that have parameters with certain values appended I have a website example.com with language translations. There used to be many translations but I deleted them all so that only English (Default) and French options remain. When one selects a language option a parameter is aded to the URL. For example, the home page: https://example.com (default) https://example.com/main?l=fr_FR (French) I added a robots.txt to stop Google from crawling any of the language translations: # robots.txt generated at http://www.mcanerin.com User-agent: * Disallow: Disallow: /cgi-bin/ Disallow: /*?l= So any pages containing "?l=" should not be crawled. I checked in GWT using the robots testing tool. It works. But under html improvements the previously crawled language translation URLs remain indexed. The internet says to add a 404 to the header of the removed URLs so the Googles knows to de-index it. I checked to see what my CMS would throw up if I visited one of the URLs that should no longer exist. This URL was listed in GWT under duplicate title tags (One of the reasons I want to scrub up my URLS) https://example.com/reports/view/884?l=vi_VN&l=hy_AM This URL should not exist - I removed the language translations. The page loads when it should not! I played around. I typed example.com?whatever123 It seems that parameters always load as long as everything before the question mark is a real URL. So if Google has indexed all these URLS with parameters how do I remove them? I cannot check if a 404 is being generated because the page always loads because it's a parameter that needs to be de-indexed.

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  • Why the huge difference between etch and lenny MySQL

    - by rmarimon
    I've been working on a program for the last year. The development environment is working with a database in MySQL running on debian etch version mysql Ver 14.12 Distrib 5.0.32, for pc-linux-gnu (i486) using readline 5.2. The production environment is working on debian lenny with version mysql Ver 14.12 Distrib 5.0.51a, for debian-linux-gnu (i486) using readline 5.2. I was just timing some database access and what takes in the development environment 150 seconds, takes 300 in the production environment. I checked the /etc/mysql/my.cnf files on both systems and the only differences are # development bind-address = 10.168.1.82 log_bin = /var/log/mysql/mysql-bin.log # production bind-address = 127.0.0.1 myisam-recover = BACKUP #log_bin = /var/log/mysql/mysql-bin.log I dump a database from the production and load it into the development and with the same server everything takes half the time !!! What should I check?

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  • Running a Check-Disk (Is it dangerous)

    - by vaccano
    I have a lap top that a friend of mine would like me to fix. It is giving a blue screen on boot up. When I looked up the error message it indicates that I should run a check disk. Is this dangerous? Should I try to off load stuff from the hard drive first? I ask because I had a hard drive of my own that when I ran check disk it wiped a bunch of "bad sectors" and I lost most of the info on it (but it had been going bad). Opinions?

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  • steam won't open after install

    - by Dan Cooper
    I've looked all over the place for a solution but no one seems to be getting the same error codes as me. When I try to run Steam through terminal I get the following error: Running Steam on ubuntu 13.04 64-bit STEAM_RUNTIME is enabled automatically Installing breakpad exception handler for appid(steam)/version(1367621987_client) Installing breakpad exception handler for appid(steam)/version(1367621987_client) unlinked 0 orphaned pipes Gtk-Message: Failed to load module "overlay-scrollbar" Installing breakpad exception handler for appid(steam)/version(1367621987_client) [1013/104817:WARNING:proxy_service.cc(646)] PAC support disabled because there is no system implementation /home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/steamUI/../common/steam/client_api.cpp (281) : Assertion Failed: ClientAPI_InitGlobalInstance: InternalAPI_Init_Internal failed. Assert( Assertion Failed: ClientAPI_InitGlobalInstance: InternalAPI_Init_Internal failed. ):/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/steamUI/../common/steam/client_api.cpp:281 Installing breakpad exception handler for appid(steam)/version(1367621987_client) Uploading dump (out-of-process) [proxy ''] /tmp/dumps/assert_20131013104817_1.dmp /home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/steamUI/SteamStartup.cpp (627) : Assertion Failed: ! "There was a problem with your Steam installation.\n" "Please reinstall steam.\n" unlinked 2 orphaned pipes CAsyncIOManager: 0 threads terminating. 0 reads, 0 writes, 0 deferrals. CAsyncIOManager: 75 single object sleeps, 0 multi object sleeps CAsyncIOManager: 0 single object alertable sleeps, 1 multi object alertable sleeps [2013-10-13 10:48:16] Startup - updater built May 3 2013 15:08:27 [2013-10-13 10:48:16] Verifying installation... [2013-10-13 10:48:16] Verification complete Shutting down. . . [2013-10-13 10:48:17] Shutdown Finished uploading minidump (out-of-process): success = yes response: CrashID=bp-d172a742-b7dd-419c-b235-d60c32131013 I've tried sudo apt-get purge and terminal tries to tell me I don't have Steam installed. I've tried reinstalling with software center but that doesn't help either.

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  • SQL SERVER – Poll – What would you love to see in SQL in Sixty Seconds?

    - by Pinal Dave
    Last week, I had my very first SQL in Sixty Seconds Video of this year. Lots of people send me email asking for me to continue this series as it was extremely fun at times to watch the video. I am going to start the series again in the month of June. However, I need your help to decide what would like to see in SQL in Sixty Seconds Videos. Here are quick poll and I requesting you to help me with the poll. Take Our Poll (function(d,c,j){if(!d.getElementById(j)){var pd=d.createElement(c),s;pd.id=j;pd.src='http://s1.wp.com/wp-content/mu-plugins/shortcodes/js/polldaddy-shortcode.js';s=d.getElementsByTagName(c)[0];s.parentNode.insertBefore(pd,s);} else if(typeof jQuery !=='undefined')jQuery(d.body).trigger('pd-script-load');}(document,'script','pd-polldaddy-loader')); Contest  If you leave a comment to this blog post and if I build a SQL in Sixty Seconds Video on it. I will send you a surprise gift (worth USD 25). Earlier Videos Here are few of my previous SQL in Sixty Seconds Video. Please check them out they should give you an idea what I usually cover in Sixty Seconds. Reference: Pinal Dave (https://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL in Sixty Seconds, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Video

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  • Oracle Enterprise Manager sessions on the last day of the Oracle Open World

    - by Anand Akela
    Hope you had a very productive Oracle Open World so far . Hopefully, many of you attended the customer appreciation event yesterday night at the Treasures Islands.   We still have many enterprise manager related sessions today on Thursday, last day of Oracle Open World 2012. Download the Oracle Enterprise Manager 12c OpenWorld schedule (PDF) Oracle Enterprise Manager Cloud Control 12c (and Private Cloud) Time Title Location 11:15 AM - 12:15 PM Application Performance Matters: Oracle Real User Experience Insight Palace Hotel - Sea Cliff 11:15 AM - 12:15 PM Advanced Management of JD Edwards EnterpriseOne with Oracle Enterprise Manager InterContinental - Grand Ballroom B 11:15 AM - 12:15 PM Spark on SPARC Servers: Enterprise-Class IaaS with Oracle Enterprise Manager 12c Moscone West - 3018 11:15 AM - 12:15 PM Pinpoint Production Applications’ Performance Bottlenecks by Using JVM Diagnostics Marriott Marquis - Golden Gate C3 11:15 AM - 12:15 PM Bringing Order to the Masses: Scalable Monitoring with Oracle Enterprise Manager 12c Moscone West - 3020 12:45 PM - 1:45 PM Improving the Performance of Oracle E-Business Suite Applications: Tips from a DBA’s Diary Moscone West - 2018 12:45 PM - 1:45 PM Advanced Management of Oracle PeopleSoft with Oracle Enterprise Manager Moscone West - 3009 12:45 PM - 1:45 PM Managing Sun Servers and Oracle Engineered Systems with Oracle Enterprise Manager Moscone West - 2000 12:45 PM - 1:45 PM Strategies for Configuring Oracle Enterprise Manager 12c in a Secure IT Environment Moscone West - 3018 12:45 PM - 1:45 PM Using Oracle Enterprise Manager 12c to Control Operational Costs Moscone South - 308 2:15 PM - 3:15 PM My Oracle Support: The Proactive 24/7 Assistant for Your Oracle Installations Moscone West - 3018 2:15 PM - 3:15 PM Functional and Load Testing Tips and Techniques for Advanced Testers Moscone South - 307 2:15 PM - 3:15 PM Oracle Enterprise Manager Deployment Best Practices Moscone South - 104 Stay Connected: Twitter | Facebook | YouTube | Linkedin | Newsletter

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  • Strategies for very fast delivery of webpages.

    - by Cherian
    I run a website Cucumbertown with an initial pay load of nearly 9KB zipped. All my js is delayed loaded with requirejs and modernizer is the only exception. Now all my webpages are Nginx cached and only 10-15% hits go to the backend proxy. And the cache is invalidated by logged in users as proxy_cache_bypass. So for an anonymous user its nearly always a cache hit. I have some basic OS tuning with default via ip dev eth0 initcwnd 15 net.ipv4.tcp_slow_start_after_idle 0 Despite an all cache & large initcwnd my pages still take 2.5 – 3 seconds. I have a yslow score of And page speed at Are there strategies that can help deliver webpages even faster than this? Deliver pages at 1+ second time for 10KB payload? Notes: My servers run of a fairly good data center from Linode at Fremont.

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  • Limiting Sybase ASE 15 CPU usage on VM

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

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  • Why does Windows run CHKDSK on every boot?

    - by khris
    Every time I turn on my PC, I get the following message: Checking file system on E: The type of the file systen is NTFS. One of your disks need to be checked for consistency. You may cancel the disk check, but it is strongly recommended that you continue. Windows will now check the disk. CHKDSK is verifying files (stage 1 of 3)... 0 percent completed I allow CHKDSK to to complete, but Windows does not load. This message appears every time I boot my computer. Could someone explain me why this message appears and what I should do to make it disappear?

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  • How do you handle reboots?

    - by Mart
    We have one VPS (Windows 2008 R2+IIS7.5), with an asp.net mvc 3 application. The main question is: how to handle issues when Windows needs to reboot? (after installing Windows Updates or anything else). The goal is to make the website 24/7, but first it's ok to show a message to the users. (we'll be back soon, something like app_offline.htm) Our application uses SQL and also writes/reads some files (uploaded photos, documents) which are not stored in SQL. What do you recommend? Load balancing with ARR? (with 1+2 servers, but what if the front-end server needs reboot?) Windows failover cluster? SQL failover cluster? What to do with uploaded files? I really don't know what would be the best (and simplest) solution.

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  • problems with Apache on Snow Leopard

    - by Hristo
    I kind of screwed up the Apache "stuff" on my Mac. Usually when I visit http://localhost/, I would see the "It Works!" but now it just lists the directory and files inside /Library/WebServer/Documents. When I try to stop/start/restart the server with sudo apachectl stop, I get: httpd: Syntax error on line 68 of /etc/apache2/httpd.conf: Cannot load /usr/libexec/apache2/mod_disk_cache.so into server: dlopen(/usr/libexec/apache2/mod_disk_cache.so, 10): Symbol not found: _apr_file_info_get$INODE64\n Referenced from: /usr/libexec/apache2/mod_disk_cache.so\n Expected in: flat namespace\n in /usr/libexec/apache2/mod_disk_cache.so I don't want to do the MacPorts install, I tried it earlier but... I just want to do it via source code with the usual ./configure, make, make install. Any ideas on how to get this working? Is there a way to totally remove Apache and then reinstall a fresh version? Thanks, Hristo

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  • problems with Apache on Snow Leopard

    - by Hristo
    I kind of screwed up the Apache "stuff" on my Mac. Usually when I visit http://localhost/, I would see the "It Works!" but now it just lists the directory and files inside /Library/WebServer/Documents. When I try to stop/start/restart the server with sudo apachectl stop, I get: httpd: Syntax error on line 68 of /etc/apache2/httpd.conf: Cannot load /usr/libexec/apache2/mod_disk_cache.so into server: dlopen(/usr/libexec/apache2/mod_disk_cache.so, 10): Symbol not found: _apr_file_info_get$INODE64\n Referenced from: /usr/libexec/apache2/mod_disk_cache.so\n Expected in: flat namespace\n in /usr/libexec/apache2/mod_disk_cache.so I don't want to do the MacPorts install, I tried it earlier but... I just want to do it via source code with the usual ./configure, make, make install. Any ideas on how to get this working? Is there a way to totally remove Apache and then reinstall a fresh version? Thanks, Hristo

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  • Should I use SSD Caching on non bootable HD?

    - by Onema
    I have an asus 9p79x pro which allows me to do SSD Caching. I have a 256 GB SSD drive that I use an my primary boot drive, and I have a 1 TB disk where I put most of my games, music, videos, dowloads, pictures, etc. I also have an extra 64 GB SSD Drive that I'm currently not using. I thought it would be a good idea to use it as my 1 TB disk cache and improve the load time of games and programs that are installed on the 1 TB disk; but will this work correctly? It seems from all that I have read online about this board that it is used to cache a boot drive. Any thoughts? Thank you

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  • VMware Workstation 7.x error loading operating system help

    - by StealthRT
    Hey all i am using the windows verison of VMware Workstation 7.x and I am getting this error when i start my VM error loading operating system That only started to happen when i tried to load that vmdk file into the program VirtualBox. Prior to this it ran just fine. Ever since then i have been unable to start it in VMware Workstation 7.x... I've already tried to repair the vmdk file but when i do it tells me there are no errors found? I used vmware-vdiskmanager.exe -R "c:\blah\my vm disk.vmdk" Anyone else have any more suggestions i could try? It's a 300+GB VM so i really don't want to lose it!!! Thanks, David

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  • Processor speeds on my machine don't live up to manufacturer hype

    - by atch
    Why am I not seeing the promised speed claims of processor manufacturers on my computer? Producers of processors claim that their product can perform so many thousands (or millions) of operations per second. And yet on my machine (4GB, 3500hz), the typical program (Word, Visual Studio etc.) takes at least 10 seconds to start. I've formatted my hard drive and ticked all the necessary boxes to optimize my machine and yet I'm not seeing the promised speeds. Say it takes Outlook ten seconds to load. How many millions of operations does it really go through in order to start up?

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  • Keyboard input system handling

    - by The Communist Duck
    Note: I have to poll, rather than do callbacks because of API limitations (SFML). I also apologize for the lack of a 'decent' title. I think I have two questions here; how to register the input I'm receiving, and what to do with it. Handling Input I'm talking about after the fact you've registered that the 'A' key has been pressed, for example, and how to do it from there. I've seen an array of the whole keyboard, something like: bool keyboard[256]; //And each input loop check the state of every key on the keyboard But this seems inefficient. Not only are you coupling the key 'A' to 'player moving left', for example, but it checks every key, 30-60 times a second. I then tried another system which just looked for keys it wanted. std::map< unsigned char, Key keyMap; //Key stores the keycode, and whether it's been pressed. Then, I declare a load of const unsigned char called 'Quit' or 'PlayerLeft'. input-BindKey(Keys::PlayerLeft, KeyCode::A); //so now you can check if PlayerLeft, rather than if A. However, the problem with this is I cannot now type a name, for example, without having to bind every single key. Then, I have the second problem, which I cannot really think of a good solution for: Sending Input I now know that the A key has been pressed or that playerLeft is true. But how do I go from here? I thought about just checking if(input-IsKeyDown(Key::PlayerLeft) { player.MoveLeft(); } This couples the input greatly to the entities, and I find it rather messy. I'd prefer the player to handle its own movement when it gets updated. I thought some kind of event system could work, but I do not know how to go with it. (I heard signals and slots was good for this kind of work, but it's apparently very slow and I cannot see how it'd fit). Thanks.

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  • Unable to Install VirtualBox Due to Missing Kernel Module

    - by SoftTimur
    I am trying to install VirtualBox on my Ubuntu. I first tried to sudo apt-get install virtualbox-ose in a terminal, but after the configuration step, it fails with an error: No suitable module for running kernel found When proceeding with starting virtualbox, I get this error: WARNING: The character device /dev/vboxdrv does not exist. Please install the virtualbox-ose-dkms package and the appropriate headers, most likely linux-headers-generic. You will not be able to start VMs until this problem is fixed. So I tried the package from http://www.virtualbox.org/, but starting VirtualBox fails with: WARNING: The vboxdrv kernel module is not loaded. Either there is no module available for the current kernel (2.6.38-8-generic-pae) or it failed to load. Please recompile the kernel module and install it by sudo /etc/init.d/vboxdrv setup You will not be able to start VMs until this problem is fixed. So I ran sudo /etc/init.d/vboxdrv setup, but it fails too: * Stopping VirtualBox kernel modules [ OK ] * Uninstalling old VirtualBox DKMS kernel modules [ OK ] * Trying to register the VirtualBox kernel modules using DKMS Error! Your kernel headers for kernel 2.6.38-8-generic-pae cannot be found at /lib/modules/2.6.38-8-generic-pae/build or /lib/modules/2.6.38-8-generic-pae/source. * Failed, trying without DKMS * Recompiling VirtualBox kernel modules * Look at /var/log/vbox-install.log to find out what went wrong The contents of /var/log/vbox-install.log. As I am stuck, I also tried to install kernel-devel with yum, still fruitless: root@ubuntu# yum install kernel-devel Setting up Install Process No package kernel-devel available. Nothing to do Now I've no idea how to correct this. Any ideas?

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  • Two identical fiber optic broadband lines working as one

    - by Katafalkas
    I have been trying to find an answer to this, but all I can find is hobbyists trying to connect their Linksys devices to get some magic out of them. I am looking for a way I could combine two 100Mbit fiber optic lines into a single connection for our office. I assume it involves some Cisco learning or something similar. Do I need to configure some big router to load-balance the NATing in some way? I assume that many of you have done something similar and hope someone could share their knowledge or at least provide me some tips on how to do this.

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  • Green System Administrator looking for helpful tips

    - by Joshua Anderson
    I have just been promoted to Systems Administrator for our product. We are designing a application that communicates with the cloud(Amazon EC2). I will be in charge of maintaining all Instances and their underlying components. So far this involves a set of load balanced services instances that connect to a central DB in a multi-tennant DB design. Im interested in what other Sys. Admins have discovered as invaluable tools or practices. Any resources provided will be greatly appreciated.

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  • Problem installing Ubuntu 10.04 64 bit side by side with Vista by using a bootable USB drive. What n

    - by Adam Siddhi
    What happened I decided to install Ubuntu 10.04 64 bit side by side with Vista Home Premium (I guess on another partition) with a USB stick. I found instructions on how to do this here: https://help.ubuntu.com/community/Installation/FromUSBStick To create the bootable USB drive I had to download a program called Unetbootin. That process was simple enough. All I had to do was just choose the disk image option, select the ubuntu-10.04-desktop-amd64.iso image, make sure it recognizes my USB drive and then press OK. It takes only like a few minutes to create a working bootable USB drive. Then I have to restart my computer, enter the BIOS, select my USB drive as the first boot drive, save options and continue with booting up. After this Ubuntu actually loads up. I think this is known as the Live version of Ubuntu so you can try it out before fully installing it. Any ways, on the Ubuntu 10.04 desktop I saw an installer. I click it and begin the installation process. Just so you know, I tried installing it 2 times. I will explain what happened each time: The first time I tried installing Ubuntu 10.04 I got stuck at step 4 of 7. I remember selecting the last option in the window which was Specify Partitions Manually (Advanced) I made my partition for Ubuntu like 52 gigs. I clicked forward and a little pop up window appeared saying Please Wait. So the installation process stalled on this window so I closed out of it and quit the installation process. So at this point I was worried because I had already selected the partition size and assumed it started making it. Since it stalled I had to quit out though. Anyways, once again I reached step 4 of 7 a decided to select the first option which is Install them side by side choosing between them each startup. I figured this was the safe way to go. I did that and the pop up window saying Please Wait popped up again but lasted only like 10 seconds. Then I got to I guess step 6 where it asks you to enter your desired name and password. Did that and clicked forward. The Ubuntu 10.04 installation load screen appeared and the loading bar at the bottom started filling up. So I got to 83% and stalled during the Importing other profile information (I think it was called this. I had the option to do this during I think step 6) process. So at this point I decided to get stop the installation process. I was getting very nervous. I tried to restart the computer but all that happened was that Ubuntu restarted. I finally got the computer to restart. I was pretty sure I had screwed something up big time by this point. As my computer was restarting I entered BIOS again and switched back to it booting from my main hard drive containing Vista. Saved it and continued the boot process. My worst fears were confirmed as Vista would not boot up. I mean I saw the little Microsoft Windows choppy animated green loading bar at the bottom of the screen and then boom! It decided to restart. When it restarted I had the option to run a memory test check to see if there was anything that needed to be repaired. That took like 20 minutes and at the end I saw that I did indeed have to repair something. I had to go through 2 repair processes. After each I had to restart the computer. The 2nd time it went through the repair process it said that it could not fully repair the damage. I was scared and restarted but Vista did load up. I got to my desktop and saw a message saying something like Repairs have been made, Please restart for changes to take effect I noticed that some Notification icons were missing and I could not hear volume in a video. Things were a bit funky. So I did restart and here I am. Now what?! So since I got back into Vista and thankfully have a working Internet connection I am trying to find answers to my problem (that is why I am writing this post). I am scared that I have partioned my hard drive 2 times after researching Installing Ubuntu 10.04 and seeing this post http://techie-buzz.com/foss/ubuntu-10-04-lts-installation-guide.html The author shows screen shots of installing Ubuntu 10.04. He shows the image of step 4 of 7 with a caption at the bottom. I will recreate it below: Select a partitioning option. Unless you want to format all the hard drive and install Ubuntu afresh, select the last option and proceed. Questions If I have indeed partitioned my HD 2 times (which I am sure it is), how do I get to a point where I can see all my bad, unfinished Ubuntu partitions and get rid of them? How do I clean this big mess up? & How can I ensure that this mess will not happen next time I try installing Ubuntu 10.04? Thank you Adam

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  • How can I download a phpbb forum with wget including password protected sections?

    - by Rocky84
    I want to make a download of a forum I moderate, before it closes for good. There's some useful info on it I want to save for myself and I don't want to export the data to another webserver, I just want the pages. Mind you, I'm a user at the forum, not the admin. Now, I googled this and found it can be easily done with wget: How can I download an entire (active) phpbb forum? I used: wget -k -m -E -p -np -R viewtopic.php*p=*,memberlist.php*,faq.php*,posting.php*,search.php*,ucp.php*,viewonline.php*,*sid*,*view=print*,*start=0* -o log.txt http://www.example.com/forum/ I experimented with this, but I can only achieve downloading the publicly visible sections, not the sections you have to log in for. I tried to achieve this by using a Firefox plugin to make a cookies.txt (while my session is logged into the forum) and add --load-cookies file cookies.txt to the command, but still I only get the publicly visible sections. Any suggestions to make this work?

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