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  • Python default version errors

    - by Robus
    For a while I've been getting this error while doing anything apt-get related: Preparing to replace python-cairo 1.4.12-1.2 (using .../python-cairo_1.8.8-1+b1_i386.deb) ... Traceback (most recent call last): [...] File "/usr/share/pycentral-data/pyversions.py", line 172, in default_version raise ValueError, "/usr/bin/python does not match the python default version. It must be reset to point to %s" % debian_default ValueError: /usr/bin/python does not match the python default version. It must be reset to point to python2.6.6 Whereas robus:/# /usr/bin/python -V Python 2.6.6 How do I fix this? I did try fixing symlinks, but then I keep getting 'too many symlink levels' errors.

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  • Prevent Focus-Stealing from any PopUp Window

    - by Florian Becke
    Hi there, i have a really annoying behavior on my Windows XP System. Any PopUp Windows (e.g. asking me for my network signin) automatically steal the focus and i end up typing half of my last line of code into the username-field of the message box. Since i have no chance to prevent the message boxes themselve, i really would like to prevent the focus change! I searched the web and here too, but the only valid answers use TweakUI and some registry entries. None of them work. I guess, its because they prevent focus stealing from another application and not from within the active application itself. Anyone out there who knows a solution to this? Thanks anyway ;) Flo

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  • Recommend Online password manager [closed]

    - by Dmitriy Nagirnyak
    Possible Duplicate: online password manager with sharing capabilities Hi, I am looking for a good online password manager with the following requirements: Single click login from browser. Single click form saving from the browser. Not attached to a single PC. Offline version (so I can use it if there is no internet, for example plug USB and have last sync-ed data). Ability to store plain text (notes, for example). Should work on Windows, Linux and Mac. So far I have been happy with RoboForm, but its offline USB version is not available on Linux. Please recommend. Thanks, Dmitriy.

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  • Outlook Search Folder - Unread Mail in shared mailbox

    - by Garrett
    I have a user who is trying to configure the Unread Mail search folder for a shared mailbox in Outlook 2007. I believe last time we accomplished this by doing an advanced find, and saving the search. However, on this computer I can't search more than one folder of the shared mailbox at a time. Everything I have read online says this isn't possible, but we have one user who has it set up and working perfectly. There's no additional software or indexing, not even Windows Desktop Search 4.0 updates installed.

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  • Why do msi installations use slower drives over faster ones in windows 7?

    - by Joshua C
    I have noticed that the slowest drive in my system is used most during an msi installation. I mainly notice this when running windows updates but it seems to be msi installs in general. The setup I last saw this occur on was running Windows 7 with the following drives: Sata: 240GB SSD NTFS ~515MB/s Operating system drive 1TB NTFS ~110MB/s Firewire: 4TB ExFAT ~80MB/s I would think that windows would choose the fastest drive with available space for temporary files. But it will instead choose the external drive with the slowest transfer speed. I could also understand choosing the 1TB for not being an ssd in an attempt to preserve the longevity of the ssd write capacity. Why does this happen? Is there a way to force these installations to use the OS drive or a specific drive?

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  • Problem with installing sqlite3 module for python 2.6 on an ubuntu system

    - by Hoang
    I need to run the sqlite3 module on python 2.6 in an ubuntu system. How do I install this module for Python 2.6? Somehow I don't have this module, it raises the error: >>> import sqlite3 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.6/sqlite3/__init__.py", line 24, in <module> from dbapi2 import * File "/usr/local/lib/python2.6/sqlite3/dbapi2.py", line 27, in <module> from _sqlite3 import * ImportError: No module named _sqlite3

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  • My New Job

    - by Stuart Brierley
    Last year I started a new job with a logistics company in the North of England, where I was responsible for the management, design and development of IT Integration strategies, architectures and solutions using BizTalk Server 2009.  This included the design and implementation of the BizTalk Server 2009 infrastructure, the definition of development standards, mentoring a fellow developer in the ways of BizTalk and migrating a number of existing solutions from Softshare over to BizTalk 2009. Unfortunately I then realised that, following this initial set up, there didn't actually seem to be that much BizTalk work for me to get stuck into and reluctantly I have now moved on from this role to a very similar role with the country's largest office supplies company.  Based in Sheffield, we distribute office supplies on a UK wide basis and computer supplies across Europe. The situation here is slightly different than when I first joined my previous employer.  Whereas that was a green field installation with no previous BizTalk solutions in place, my new employer currently has a number of live BizTalk 2000 (!) and BizTalk 2006 solutions in place.  Unfortunately the infrastructure around these is less than ideal; with no clear distinction between development and test environments and no source control what so ever! We are currently building a proposal for a new BizTalk Server 2010 implementation, where I am hopeful of being able to implement fully independent development, test and pseudo-live environments, alongside an enterprise level live installation.  We should also be introducing Team Foundation Server to the development process, thereby giving us some much needed source control capabilities. Following this is likely to be a period of migration for the existing BizTalk Solutions, along with the onward development of new projects and initiatives - I'm hoping to be a busy man for the forseeable future :o)

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  • TechEd Europe early bird saving &ndash; register by 5th July

    - by Eric Nelson
    Another event advert alert :-) But this one comes with a cautious warning. I spoke at TechEd Europe last year. I found TechEd to be a huge, extremely well run conference filled with great speakers and passionate attendees in a top notch venue and fascinating city. As an “IT Pro” I think it is the premiere conference for Microsoft technologies in Europe. However, IMHO and those of others I trust, I didn’t think it hit the mark for developers in 2009. There was a fairly obvious reason – the PDC was scheduled to take place only a couple of weeks later which meant the “powder was being kept dry” and (IMHO) some of the best speakers on developer technologies were elsewhere. But I’m reasonably certain that this won’t be repeated this year (Err… Have I missed an announcement about “no pdc in 2010”?) Enjoy: Register for Tech·Ed Europe by 5 July and Save €500 Tech·Ed Europe returns to Berlin this November 8 – 12, for a full week of deep technical education, hands-on-learning and opportunities to connect with Microsoft and Community experts one-on-one.  Register by 5 July and receive your conference pass for only €1,395 – a €500 savings. Arrive Early and Get a Jumpstart on Technical Sessions Choose from 8 pre-conference seminars led by Microsoft and industry experts, and selected to give you a jumpstart on technical learning.  Additional fees apply.  Conference attendees receive a €100 discount.   Join the Tech·Ed Europe Email List for Event Updates Get the latest event news before the event, and find out more about what’s happening onsite.  Join the Tech·Ed Europe email list today!

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  • Dealing with selfish team member(s)

    - by thegreendroid
    My team is facing a difficult quandary, a couple of team members are essentially selfish (not to be confused with dominant!) and are cherry-picking stories/tasks that will give them the most recognition within the company (at sprint reviews etc. when all the stakeholders are present). These team members are very good at what they do and are fully aware of what they are doing. When we first started using agile about a year ago, I can say I was quite selfish too (coming from a very individual-focused past). I took ownership of certain stories and didn't involve anyone else in it, which in hindsight wasn't the right thing to do and I learnt from that experience almost immediately. We are a young team of very ambitious twenty somethings so I can understand the selfishness to some extent (after all everyone should be ambitious!). But the level to which this selfishness has reached of late has started to bother me and a few others within my team. The way I see it, agile/scrum is all about the team and not individuals. We should be looking out for each other and helping each other improve. I made this quite clear during our last retrospective, that we should be fair and give everyone a chance. I'll wait and see what comes out of it in the next few sprints. In the meantime, what are some of the troubles that you have faced with selfish members and how did you overcome them?

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  • How to disable or edit Google Chrome Developer Tools shortcut?

    - by HoLyVieR
    There is a shortcut in the Google Chrome Developer Tools which happen to trigger every times I try to type the [ or ] character in the console. The shortcut in question probably is Alt+[, Alt+^ or [ and it moves the tabs (of the Chrome Developer Tools) to the last selected one. This shortcut is simply blocking me from typing the [ or ] in the console and I want to either disable it or edit it to something else. How can I edit or disable that shortcut ? Note : I'm not really using the shortcut in the developers tools, so if it's only possible to disable all shortcut it would be a viable solution.

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  • Windows 8&ndash;Custom WinRT components and WinJS

    - by Jonas Bush
    Wow, I’m still alive! I installed the RTM of Windows 8 when it became available, and in the last few days have started taking a look at writing a windows 8 app using HTML/JS, which in and of itself is a weird thing. I don’t think that windows developers of 10 years ago would’ve thought something like this would have ever come about. As I was working on this, I ran across a problem, found the solution, and thought I’d blog about it to try and kick start me back into blogging. I already answered my own question on Stack Overflow, but will explain here. I needed to create a custom WinRT component to do some stuff that I either wouldn’t be able to or didn’t know how to do with the javascript libraries available to me. I had a javascript class defined like this: WinJS.Namespace.define("MyApp", { MyClass: WinJS.Class.define(function() { //constructor function }, { /*instance members*/ }, { /*static members*/ }) }); This gives me an object I can access in javascript: var foo = new MyApp.MyClass(); I created my WinRT component like this: namespace MyApp { public sealed class SomeClass { public int SomeMethod() { return 42; } } }   With the thought that from my javascript, I’d be able to do this: var foo = new MyApp.MyClass(); var bar = new MyApp.SomeClass(); //from WinRT component foo.SomeProperty = bar.SomeMethod();   When I tried this, I got the following error when trying to construct MyApp.MyClass (the object defined in Javascript) 0x800a01bd - Javascript runtime error: Object doesn't support this action. I puzzled for a bit, then noticed while debugging that my “MyApp” namespace didn’t have anything in it other than the WinRT component. I changed my WinRT component to this: namespace MyAppUtils { public sealed class SomeClass { //etc } } And after this, everything was fine. So, lesson learned: If you’re using Javascript and create a custom WinRT component, make sure that the WinRT component is in a namespace all its own. Not sure why this happens, and if I find out why or if MS says something about this somewhere, I’ll come back and update this.

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  • Career paths after web development?

    - by Mike
    I know this is open ended, but I'm just curious what you've done after your web development career, or if you've stayed loyal. I have a feeling/read/heard that web development salaries top out at a certain amount.. even after 10-15 years of experience. Reason I ask is that I graduated last summer with a BS in Chemical Engineering.. but have not been able to find a job in California. I've been web designing/developing since high school and thought that I should start a career, even if its not related to my major and not lose more time. Even though I'd really like to have an engineering career, I don't think that will happen. Do you guys have any suggestions or experiences for choices after/ways to enhance your career after several years in web development? Thanks! Update: Thanks for the responses guys! One more question: Is it likely to be accepted into a MS/PhD program if you've been out of uni for a couple years? Or with semi-related job experience? Would I be a bit of a misfit with a BS in ChemE studying CS/CompE for an MS?

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  • dell u2410 3dMark Benchmark distortion problems

    - by Scanningcrew
    Ive been doing burn in testing for a new system I have put together and I am running into some video distortion problems with running the 3DMark benchmark tools (Both 06 and Vantage). The graphics will be fine, then sometimes during a test switch the screen will light up with thin horizontal ranibow lines (Something that looks very "glitchy") If i turn the monitor off and back on it clears up. All the tests "pass" and my system gets good marks but it concerns me if I might have problems with games (The screen returns to normal if I dont resest monitor and just let tests pass). I want to return a problem component now before its too late if it is something with the new hardware. Also, I am monitoring temp with thermal laser gun and the card itself is not going above 65c. Any ideas? System: Asrock x58 Xtreme - Last BIOS (1.80) EVGA Geforce GTX 285 w/ latest nvidia drivers (Connect via DVI1) Dell U2410(Set to 59hz refresh 1900x1202 -although I believe benchmarks run 1200x1024) Windows 7 Ultimate 64 12Gb DDR3 1600 RAM

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  • Brand new battery is 100% charged but at 0% capacity

    - by Chris Conway
    I just bought a brand new battery to replace one that had seemingly died. I followed the instructions that came with the battery and charged it overnight, then ran my computer on battery until it was in a critical state and charged it overnight again. Now the battery appears to be 100% charged and at the same time at 0% capacity—when it's plugged in it doesn't charge and when it's unplugged the computer immediately goes into low power mode. I've taken the battery out and checked the contacts. I've rebooted the system with and without the battery. Nothing seems to help. I'm not sure if I should blame the battery, the laptop, the charger, or the power management software for this state of affairs. The obvious answer would be the battery but I bought this battery because another year-old battery exhibited similar behavior—I assumed it was dead and a Dell tech came to the same conclusion. I'm loathe to order another new battery without first exploring other explanations. What can I do to diagnose this problem? Here's the /proc info: $ cat /proc/acpi/battery/BAT0/state present: yes capacity state: critical charging state: charged present rate: 1 mA remaining capacity: 0 mAh present voltage: 9754 mV $ cat /proc/acpi/battery/BAT0/info present: yes design capacity: 6600 mAh last full capacity: 6789 mAh battery technology: rechargeable design voltage: 11100 mV design capacity warning: 660 mAh design capacity low: 200 mAh cycle count: 0 capacity granularity 1: 66 mAh capacity granularity 2: 66 mAh model number: DELL WK serial number: 4043 battery type: LION OEM info: SMP

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  • Podcast Show Notes: Are You Future Proof?

    - by Bob Rhubart
    On September 14, 2012 ZDNet blogger Joe McKendrick published Why IT is a Profession in Flux, a short article in which he makes the observation that "IT professionals are under considerable pressure to deliver more value to the business, versus being good at coding and testing and deploying and integrating." I forwarded that article to my list of Usual Suspects (the nearly 40 people who have participated in the podcast over the last 3 years), along with a suggestion that I wanted to put together a panel discussion to further explore the issue. This podcast is the result. As it happened, three of the people who responded to my query were in San Francisco for Oracle OpenWorld, as was I, so I seized the rare opportunity for a face to face conversation. The participants are all Oracle ACE Directors, as well as architects: Ron Batra, Director of Cloud Computing at AT&T Basheer Khan, Founder, President and CEO at Innowave Technology Ronald van Luttikhuizen, Managing Partner at Vennster. The Conversation Listen to Part 1 Future-Proofing: As powerful forces reshape enterprise IT, your IT and software development skills may not be enough. Listen to Part 2 Survival Strategy: Re-tooling one’s skill set to reflect changes in enterprise IT, including the knowledge to steer stakeholders around the hype to what’s truly valuable. Listen to Part 3 Writing on the Wall: Do the technological trends that are shaping enterprise IT pose any threat to basic software development roles? What opportunities do these changes represent? The entire conversation is also available in video format from the OTN YouTube Channel. Your Two Cents What are you doing to future-proof your IT career? Share your thoughts in the comments section.

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  • Releasing an open source project without getting embarrassed

    - by Hopeful
    I've been working by myself on a fairly large open source project for quite a while and it's nearing the point where I'd like to release it. However, I'm self-taught and I don't really know anyone who could adequately review my project. A few years ago, I had released a small bit of code which pretty much got ripped apart (in a critical sense) on the forum where I released it. Even though the code worked, the criticism was accurate but brutal. It prompted me to begin searching for best practices for everything and in the end I feel that it made me a much better developer. I've gone over everything in my project so many times trying to make it perfect that I've lost count. I believe in my project and think it has the potential to help a lot of people and I feel like I've done some cool things in interesting ways with it. Still, because I'm self-taught, I can't help but wonder what gaps exist in my self-education. The way my code was ripped apart last time isn't something I'd like to repeat. I think my two biggest fears with releasing my project that I've poured countless hours into are being absolutely embarrassed because I missed some patently obvious things because of my self-education or, worse, releasing it to the sound of crickets. Is there anyone who has been in a similar situation? I'm not afraid of constructive criticism, so long as it is constructive and not just a rant on how I screwed up. I know there is a code review site on StackExchange, but it's not really set up for large projects and I didn't feel like the community there is large enough yet to get good feedback if I were to post parts of my project piecemeal (I tried with one file). What can I do to give my project at least some measure of success without getting embarrassed or devestated in the process?

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  • File saving disabled 'Saving has been disabled by system admin'

    - by Gubuntu
    I have coded my own html website recently, and today wished to add a Google calender object to it. I have not put this website on the web because it is for my own personal use and I can't buy a domain. So I just have a folder on my pc that I load the index.html from now and then. As I was saying, today I got an error while trying to save the Google calender object in. I am system admin on my PC, in fact no one else uses but me, except when I have friends round, but for once my PC seems to think I'm some standard account user, because I couldn't save. I thought of clicking close and seeing if it came up with save as, but it didn't, it said 'Are you sure you want to close without saving?' or something along the lines of that, and 'Saving has been disabled by your system admin.' I couldn't do anything. I tried looking at the settings of the file, and it had me as read only in one of the selections, so I changed that to read & write, but to no avail. I did not save as root when I last edited the file, so I don't get what's going on. Help! P.S. This is on Ask Ubuntu not Superuser because it is on my Ubuntu PC and it appears to be a problem with Ubuntu not root or hardware.

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  • Transfer .com domain to GoDaddy - websites running on same domain - 3 weeks left until expiration, 2 days left web hosting

    - by Eric Nguyen
    Our company purchased this abc.com domain from a local registrar. The domain will expire in about 3 weeks. We have our main websites running on this abc.com domain and they cannot be down for too long. The web hosting service will end in 2 days. Our websites are already hosted and they are up and running on Amazon EC2. We would like to transfer the domain to GoDaddy now or as soon as possible. (since we have many other domains there and we belive GoDaddy will be better in long-term considering the prices and the features it offers) There are many questions on the decision to transfer the domain to GoDaddy: 1) Cost and time required to move out of our local registrar? This is currently unknown as I'm still trying to retrieve the agreement we have with them 2) How does the 3 week time left until expiration of the domain matters here? Should we wait until the domain expires and then purchase in through GoDaddy? How long would such process take as I suppose our websites will be down during that time? Any other drawbacks? 3) What can I do to ensure our websites will continue functioning regardless of the domain transfer process? It seems the actual registrar here is enom.com and the local registrar here just partners with it I suppose I should then park the abc.com domain with enom.com and make changes to DNS settings so that our websites can continue to be hosted on EC2 as normal. How long does it normally take the domain to be transferred to GoDaddy completely? Is it even possible at all to keep our websites are up and running during the whole domain transfer process? Apologies that I'm throwing many questions at the same time here. It's rather last minutes and I suddenly realised there are too many unknown risks.

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  • Oracle SOA Suite, the Most Capable Tool for Every Possible Integration Challenge

    - by Demed L'Her
    session ID: CON8601 - when: Monday, Oct. 1, 10:45am-11:45am - where: Moscone South 102 "Oracle SOA Suite, the Most Capable Tool for Every Possible Integration Challenge" is the name of the session I will be delivering at Oracle OpenWorld this year. I'm usually going for more subdued titles but decided to remove the gloves this year, at the risk of sounding arrogant! While we have a number of worthy competitors in various areas of integration no one can really compete with the breadth and reliability of Oracle SOA Suite. This session is primarily intended for people who are not yet familiar with Oracle SOA Suite (i.e. if you are an existing customer your time might be better spent at some of the other sessions we have on the topic). I will provide an overview of Oracle SOA Suite, the customers using it and the types of challenges they are solving with it: from integrating Oracle Applications (E-Business Suite, Siebel, PeopleSoft, RightNow, Taleo etc.) to third-party applications (did you know that over a third of our customers actually use us to integrate SAP?), mainframes and a variety of technologies. We will talk about some emerging trends and problems that our users are solving with the product: cloud integration, B2B consolidation and mobile-enablement. I will also briefly touch upon the exciting projects we are doing with Oracle Event Processing, in the domain of "Fast Data" and "Big Data". Last but not least, I will be joined on stage by Venktesh Maudgalya, Director at Electronic Arts. Venktesh will bring his customer perspective and explain how EA leveraged Oracle SOA Suite to implement iHub, the massive integration hub that interconnects all their applications (E-BusinessSuite, Hyperion, Demantra, Peoplesoft, Salesforce.com, Kronos, Teradata, GXS etc.) and carries 3/4 of their revenue flows. I just picked up my badge and will be kicking off the festivities tomorrow talking to partners in a pre-OOW briefing at the Oracle Headquarters - see you next week! PS: if you're going to tweet about Oracle SOA Suite next week please make sure to use the #oraclesoa and #oow hashtags so that we can track and amplify your tweets!

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  • Edimax wireless router is not providing DNS services correctly

    - by Nathan Fellman
    I have an Edimax router that is set up to connect to the internet via L2TP on cable, and on the LAN side it's set up as a DHCP server. The DHCP server gives correct IP addresses, but it sets itself up as the DNS server. However, it doesn't provide the DNS service. I am sure that it's a problem with the router, because I have two computers on the network with the same problem. I see that on the WAN side it gets correct DNS addresses from the ISP, so I'd expect the router to either pass these addresses through to the DHCP clients, or to serve the DNS requests itself by forwarding them to the ISP's DNS. However, it apparently does neither, and there is no DNS. I switched from ADSL to cable last week. On ADSL it connected using PPPoE, and the DNS worked fine. What can be the problem here?

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  • Minimum Baseline for Extended Support are you Ready ?

    - by gadi.chen
    As you all know the Premier support for 11i was ended last year. The extended support is available, but to use it you are advised to be at a minimum patch level as describe in note: 883202.1. So how you can know if you are in the minimum patch level? So, there are few ways. Patch wizard. Contact Oracle Support. Upload me Patch wizard Easy to use, very intuitive, required installing patch 9803629. Check MOS note: 1178133.1 Oracle Support You can log an SR thru My Oracle Support a.k.a MOS. Upload me In this option you will need to run simple sql statement (attached below or you can download it from here patchinfo.sql ) via sql*plus and upload/mail me the output and I will mail you back as soon as I can a detailed report of the required patches to be installed in order to be supported. Gadi Chen Oracle Core Technology Consultant [email protected] -------------------------------- Start from Here --------------------------------- set pagesize 0 echo off feedback off trimspool on timing off col prod format a8 col patchset format a15 spool patchinfo.txt select instance_name, version from v$instance; select bug_number from ad_bugs; prompt EOS select decode(nvl(a.APPLICATION_short_name,'Not Found'), 'SQLAP','AP','SQLGL','GL','OFA','FA', 'Not Found','id '||to_char(fpi.application_id), a.APPLICATION_short_name) prod, fpi.status, nvl(fpi.patch_level,'Unknown') patchset from fnd_application a, fnd_product_installations fpi where fpi.application_id = a.application_id(+) and fpi.status != 'N' and fpi.patch_level is not null order by 2,1; spool off; exit

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  • Zyxel p-2602HW-1DA - LAN to WAN routing problems

    - by Garrett
    Hi Got a new router yesterday (due to new internet supplier) and now all my requests for my own server (local lan) is routed directly to the router instead of the server, when using dns. Ex. I have a website www.mysite.org running on my server at home (local lan). From work I can access it via www.mysite.org, which is great. But from home (local lan) my request's for www.mysite.org gets rerouted to the routers web admin interface My last router didn't do this. My new router is a Zyxel P-2602HW-1DA, my old one was a LinkSys WRT-54GC V. 2.0. There's a rather wierd WAN-LAN, WAN-WAN setup interface which I cant really comprehend yet and the docs are rather vague. Have anyone had the same problem and can anyone guide me to a solution, would nice not write the ip address everytime i need to access the server on local lan. :). Kind regards Garrett

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  • Radeon 5850 Why am I not getting 3 monitors up as a choice ??

    - by Jan
    Ive just bought the top end ATI Radeon card with 2 normal monitor ports and a HDMI. The idea was to continue using my dual screen setup as always and to use the last plug, the HDMI on my TV. I got a new 52 inch HD TV with all the necessary bits. This should work fine. But.. in Display Properties I still get only my 2 monitors up as options. Not the Digital TV. When I unplug 1 monitor and restart the computer, I get the TV and the other monitor. But never all 3 at the same time. Why is this ? Where can I go to tell it that I need all 3 screens at the same time. Also I get a message saying my gfx card also gives sound through the HDMI cable.. But the TV tells me its recieving a sound format that it does not understand. Any ideas on that too while were at it ?

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  • apache2 is making my amazon ec2 unavailable, any ideas?

    - by Tim
    I have a web server running on a EC2 c1.medium intance. The instance is running on ubuntu, with apache2 and mysql.The ubuntu and apache version are the next; Ubuntu DISTRIB_ID=Ubuntu DISTRIB_RELEASE=11.04 DISTRIB_CODENAME=natty DISTRIB_DESCRIPTION="Ubuntu 11.04" Apache2 Server version: Apache/2.2.17 (Ubuntu) Server built: Feb 22 2011 18:33:02 Sometimes randomly, my server "hangs up", I cannot connect to it using normal web access or ssh access. If I reboot the instance it reboots fine, the amazon system log doesn't show anything weird, but the problem persists The only way to solve it its stopping the instance, and start it again. I think that the problem its has something to do with apache, because the last lines of the error log lists: normal errors [Sun Jun 19 06:25:09 2011] [notice] Apache/2.2.17 (Ubuntu) PHP/5.3.5-1ubuntu7.2 with Suhosin-Patch configured -- resuming normal operations nobody cant connetc... no more erros until i stop and start the instance normal errors [Wed Jun 22 14:21:18 2011] [notice] Apache/2.2.17 (Ubuntu) PHP/5.3.5-1ubuntu7.2 with Suhosin-Patch configured -- resuming normal operations nobody cant connetc... no more erros until i stop and start the instance Can somebody please help me?

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  • Xen DomU on DRBD device: barrier errors

    - by Halfgaar
    I'm testing setting up a Xen DomU with a DRBD storage for easy failover. Most of the time, immediatly after booting the DomU, I get an IO error: [ 3.153370] EXT3-fs (xvda2): using internal journal [ 3.277115] ip_tables: (C) 2000-2006 Netfilter Core Team [ 3.336014] nf_conntrack version 0.5.0 (3899 buckets, 15596 max) [ 3.515604] init: failsafe main process (397) killed by TERM signal [ 3.801589] blkfront: barrier: write xvda2 op failed [ 3.801597] blkfront: xvda2: barrier or flush: disabled [ 3.801611] end_request: I/O error, dev xvda2, sector 52171168 [ 3.801630] end_request: I/O error, dev xvda2, sector 52171168 [ 3.801642] Buffer I/O error on device xvda2, logical block 6521396 [ 3.801652] lost page write due to I/O error on xvda2 [ 3.801755] Aborting journal on device xvda2. [ 3.804415] EXT3-fs (xvda2): error: ext3_journal_start_sb: Detected aborted journal [ 3.804434] EXT3-fs (xvda2): error: remounting filesystem read-only [ 3.814754] journal commit I/O error [ 6.973831] init: udev-fallback-graphics main process (538) terminated with status 1 [ 6.992267] init: plymouth-splash main process (546) terminated with status 1 The manpage of drbdsetup says that LVM (which I use) doesn't support barriers (better known as tagged command queuing or native command queing), so I configured the drbd device not to use barriers. This can be seen in /proc/drbd (by "wo:f, meaning flush, the next method drbd chooses after barrier): 3: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r---- ns:2160152 nr:520204 dw:2680344 dr:2678107 al:3549 bm:9183 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 And on the other host: 3: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r---- ns:0 nr:2160152 dw:2160152 dr:0 al:0 bm:8052 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 I also enabled the option disable_sendpage, as per the drbd docs: cat /sys/module/drbd/parameters/disable_sendpage Y I also tried adding barriers=0 to fstab as mount option. Still it sometimes says: [ 58.603896] blkfront: barrier: write xvda2 op failed [ 58.603903] blkfront: xvda2: barrier or flush: disabled I don't even know if ext3 has a nobarrier option. And, because only one of my storage systems is battery backed, it would not be smart anyway. Why does it still compain about barriers when I disabled that? Both host are: Debian: 6.0.4 uname -a: Linux 2.6.32-5-xen-amd64 drbd: 8.3.7 Xen: 4.0.1 Guest: Ubuntu 12.04 LTS uname -a: Linux 3.2.0-24-generic pvops drbd resource: resource drbdvm { meta-disk internal; device /dev/drbd3; startup { # The timeout value when the last known state of the other side was available. 0 means infinite. wfc-timeout 0; # Timeout value when the last known state was disconnected. 0 means infinite. degr-wfc-timeout 180; } syncer { # This is recommended only for low-bandwidth lines, to only send those # blocks which really have changed. #csums-alg md5; # Set to about half your net speed rate 60M; # It seems that this option moved to the 'net' section in drbd 8.4. (later release than Debian has currently) verify-alg md5; } net { # The manpage says this is recommended only in pre-production (because of its performance), to determine # if your LAN card has a TCP checksum offloading bug. #data-integrity-alg md5; } disk { # Detach causes the device to work over-the-network-only after the # underlying disk fails. Detach is not default for historical reasons, but is # recommended by the docs. # However, the Debian defaults in drbd.conf suggest the machine will reboot in that event... on-io-error detach; # LVM doesn't support barriers, so disabling it. It will revert to flush. Check wo: in /proc/drbd. If you don't disable it, you get IO errors. no-disk-barrier; } on host1 { # universe is a VG disk /dev/universe/drbdvm-disk; address 10.0.0.1:7792; } on host2 { # universe is a VG disk /dev/universe/drbdvm-disk; address 10.0.0.2:7792; } } DomU cfg: bootloader = '/usr/lib/xen-default/bin/pygrub' vcpus = '2' memory = '512' # # Disk device(s). # root = '/dev/xvda2 ro' disk = [ 'phy:/dev/drbd3,xvda2,w', 'phy:/dev/universe/drbdvm-swap,xvda1,w', ] # # Hostname # name = 'drbdvm' # # Networking # # fake IP for posting vif = [ 'ip=1.2.3.4,mac=00:16:3E:22:A8:A7' ] # # Behaviour # on_poweroff = 'destroy' on_reboot = 'restart' on_crash = 'restart' In my test setup: the primary host's storage is 9650SE SATA-II RAID PCIe with battery. The secondary is software RAID1. Isn't DRBD+Xen widely used? With these problems, it's not going to work.

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