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  • Real time mirroring between two sql server databases

    - by Matt Thrower
    Hi, I'm a c# programmer, not a DBA and I've had the (mis)fortune to be handed a database admin task. So please bear this in mind when answering this question. What I've been asked to do is to create a real time two-way mirror between two databases with a 10 Megabit connection between them. So when either changes it updates the other. This is not a standard data mirroring/failover task where one DB is the master and the other is a backup - both are live and each needs to instantly reflect changes made to the other. In my head this sounds like a tall order, one which may even be impossible - after all in a rapidly changing environment with lots of users this is going to be massively resource intensive and create locks and queues of jobs all over the place. Is it possible? If so, can anyone either give me some basic instructions and/or point me at some places to start my reading and research? Cheers, Matt

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  • Windows Server 2008 Scheduled Tasks not running - 0x80041323 - Reduce Number of tasks running in the specified context?

    - by Mayb2Moro
    I am getting the following problem on a number of windows 2008 servers. 0x80041323 Task Scheduler failed to start task \Reporting" in TaskEngine "S-1-5-18:NT AUTHORITY\System:Service:" for user "NT AUTHORITY\System". User Action: Reduce the number of tasks running in the specified user context. I've done lots of research around the web but have been unable to come up with a working answer. I have found some information suggesting increasing a value in the registry key "TasksInMemoryQueue" which I have done, but even setting this as high as 500 has not helped. I have rebooted the server after setting this value. The server does run a high volume of Scheduled tasks, there could be 150 or so running at any one time, but certainly not 500. The scheduled tasks are all running under the system user. Does anyone have any ideas?

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  • Apple RAID configuration vs Hardware RAID

    - by James Hill
    I am researching external HDD's capable or RAID 1 to store a large amount of video content during overseas filming. After filming, the content will be brought back to the office and offloaded onto our storage server. After doing some research, I've found that I can buy an external drive with a built in RAID controller, or I can buy an external drive, with 2 HDD's, that I can configure in a RAID 1 array using the OS. RAID 1 is what we're looking for. I've done some reading on software RAID vs. hardware RAID, but the resources I've found don't discuss performance as it relates to video content or what happens to a software RAID when the computer dies. Question 1: Will the hardware RAID be more performant when dealing with large video files? Question 2: If the mac dies, does my RAID die with it (will my data be accessible on another mac)?

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  • Monitoring System for the cloud?

    - by Maxim Veksler
    I need a monitoring system, much like ganglia / nagios that is build for the cloud. I need it to support : Adding / removing nodes dynamically. (Node shuts down, dose not imply node failure...) Dynamic node based categorization, meaning node can identify them self as being part of group X (ganglia gets this almost right, but lacks the dynamic part...) Does not require multicast support (generally not allowed in cloud based setups) Plugins for recent cool stuff such as Hadoop, Cassandra, Mongo would be cool. More features include: External API, web interface and co. I've looked at Ganglia, munin and they both seem be almost there (but not exactly). I would also go for reasonably priced Software as Service solution. I'm currently doing research, so Suggestions are highly appreciated. Thank you, Maxim

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  • Files hidden on USB hard disk because of virus, how to clean?

    - by hammad
    I have 1 GB hard drive. First all of its contents were gone after a virus got in (when I have the drive to someone else). After research found that it was a virus may be. I run Nortan antivus and removed certain virus. Then ran malewarebytes, now ad-aware and avg 2011 antivirus. Now i could see the files on my other computer. But now I have hooked this to my new macbook pro (windows installation) and i can't see the files. The antivurs does find all the files. MacOSX wrote a 400 MB directory there which i can see but nothing else. How to fix this? Which program will fix it?

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  • How can we control the device driver load order in Windows XP ?

    - by Deniz
    We are trying to install both an HP scanner and a Kodak scanner on an XP machine and the problem is that that HP's scanner driver always places itself into the first and default scanner device position. We are using an automation software on that machine which must use the Kodak scanner as the default scanner. The HP flatbed isn't needed to be the default scanner on that machine. It will always be used manually and through its own software. Our developers did some research 2 years ago couldn't find a solution. Nowadays we are preparing to expand our user base and this problem did surface again on machines with the same configuration. I did a more aggresive search pn the net and found some tips like this one : http://support.microsoft.com/kb/115486 I couldn't realize how to suit this solution to my scenario. Could someone please point me to the right direction ?

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  • Using WebSphere CloudBurst with PowerVM to AIX virtualization over a cloud

    - by ADD Geek
    hi there we are studying the virtualization option to reduce our datacenter cost, and this research was assigned to me. we looked into alternatives and we almost reached a conclusion that PowerVM is the only option to virtualize pSeries servers. we found no signs of cloud support explicitly mentioned in any document, however there was the mention of CloudBurst. from the videos we watched and the documents we read, it seems that CloudBurst is more oriented towards Application Servers (WebSphere Software). but our environment is not relying only on WebSphere. we have some banking applications, Oracle Databases and MQ/Broaker. the question is: 1- can we virtualize the existing applications (all running AIX) on a cloud running on top of some of the existing servers? (given that we do the sizing properly) 2- is PowerVM to run on top of CloudBurst? 3- if the above solution is applicable, is this some sort of HA solution (since the VM will run on top of multiple physical boxes, while the same physical box will run multiple live images) thanks for your help

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  • Ubuntu 9.10 x64 has no sound, while Ubuntu 9.04 32 bit does.

    - by Macha
    I installed Ubuntu 9.10 x64 recently. Up until now I've been on 32 bit Ubuntu. For the first time since installing it, I went and tried to play a Youtube video. There was no sound. So a quick test to the system reveals that nothing will play sound (And I've tried turning the volume too full, as some have said output is quite quiet, but there is no sound at all). Further research shows that in sound preferences, the only output device listed was Dummy Output. Why would it work in 9.04 x86 and not 9.10 x64? While booting up, and occasionally with the sound preferences dialog open, I get a loud click (even though it isn't recognising my sound card). It's a Dell Studio 17 laptop. I'm not sure what the exact model of sound card is.

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  • Which hosts have low latency across United States and Europe?

    - by Joost van Doorn
    I'm looking for some information on web hosts that have low latency (<100ms) to both the United States and Europe. The host can be in either the United States or Europe. Latency is most important to the United States, United Kingdom, the Netherlands, Sweden and Norway. Should be able to provide managed hosting. Hosting at multiple locations is not what I'm looking for. Answers should contain at least some latency information from multiple locations, preferably from Los Angeles, New York, London, Amsterdam and Oslo. Also some information on your experience with this host is preferred, do not rant, do provide details of your package (with or without SLA, dedicated or VPS etc.). From my own little research I found that probably New York based hosts can offer low latency to all these locations, but I do not have much statistics to back that up other than my own ping is about 85ms to New York from the Netherlands.

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  • How to force-restart a PC with vPro technology?

    - by Dan Nissenbaum
    I would like to know how to force-restart a PC that has crashed/hung and become completely non-responsive, using 2nd-generation vPro technology. Assume there is a second, fully responsive PC on the same LAN that can be accessed remotely to assist. Specifically, I am considering purchasing a PC with an i7-2860QM CPU, which is vPro-enabled (according to Intel). Here are two links that indicate it should be possible to force-restart a hung system with a 2nd-generation vPro-enabled CPU: Seconds 24-39 of What Is Intel vPro™ Technology? Page 17 (21 of the PDF) of Intel® vPro™ Technology: Reference Guide However, after extensive research, I cannot find a straightforward and trustworthy source of confirmation that this will actually work as I describe, or any documentation about how to set it up. I would appreciate both a reliable confirmation, and a source of documentation. This question is a follow-up to: Wake-on-LAN (WOL) fails after computer crashes (Windows 7 64-bit).

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  • Asterisk does not recognise DTMF tones from mobile phones

    - by Eugene van der Merwe
    We have an Asterisk 1.8.7.0 (the Elastix derivative) switchboard. Every since a month ago, seemingly out of the blue, the switchboard does not recognise DTMF tones any more from mobile phones. Testing the switchboard using 7777 works. Testing the switchboard from a normal phones works. Testing the switchboard from a mobile phone fails. Looking at the log file I can't see anything. I used 'asterisk -rvvvv' and 'tail -f /var/log/asterisk/full' to see the live output and scan the logs. I guess I don't see anything because it's simply not recognising the DTMF tones. I did brief research and found an old setting for SIP phones, 'rfc2833compensate=yes', and tried adding this to 'sip_general_custom.conf'. After that I did 'core restart when convenient' but that didn't make any difference. Could anyone give me some additional troubleshooting steps?

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  • Deep freeze alternative for Ubuntu

    - by Nrew
    I made some research and found out that Deep freeze is not available for ubuntu. Is there a software like deep freeze for Ubuntu 10.04. To prevent writing data on the disk. I need this so that I could try all sorts of stuff on Ubuntu without worrying if I could damage the Windows installation that is installed along side with it. Virtual box is good. But the performance is not. Because I only have 2gb of ram.

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  • PostgresQL on Amazon EBS volume, realistic performance, or move to something more lightweight?

    - by Peck
    Hi, I'm working on a little research project, currently running as an instance on ec2, and I'm hoping to figure out whether I'm going down the right path. We, like a thousand other people, are making use of some of twitters streaming feeds to do gather some data to have fun with and my db seems to be having problems keeping up, and queries take what seems to be a very long time. I'm not a DBA by trade, so I'll just dump some info here and add more if need be. System specs: ec2 xl, 15 gigs of ram ebs: 4 100 gb drives, raid 0. The stream we're getting we're looking at around 10k inserts per minute. 3 main tables, with the users we're tracking somewhere in the neighborhood of 26M rows currently. Is this amount of inserts on this hardware too much to ask out of ebs? Should take a look at some things with less overhead like mongodb?

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  • Encrypt connection between apache web server and mysql server.

    - by microchasm
    I'm setting up a local webapp. I have a CentOS-5 box that will be the webserver (Apache 2.2). I have another box (RHEL5) that will be used only for MySQL. The data will be encrypted on the webserver via PHP before being sent to the MySQL box and inserted into the db. All web-based connections to the webserver will be encrypted via SSL. From the research I've done, it's not totally clear on whether or not there is a need to encrypt the connection to the db from webserver (NB paranoia level: Orange). If it is not overkill, or even if it is (unless it is a really bad idea for some reason), any advice or pointers on the direction to take to get this done would be appreciated.

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  • Distributed, Parallel, Fault-tolerant File System

    - by Eddified
    There are so many choices that it's hard to know where to start. My requirements are these: Runs on Linux Most of the files will be between 5-9 MB in size. There will also be a significant number of small-ish jpgs (100px x 100px). All of the files need to be available over http. Redundancy -- ideally it would provide the space efficiency similar to RAID 5 of 75% (in RAID 5 this would be calculated thus: with 4 identical disks, 25% of the space is used for parity = 75% efficent) Must support several petabytes of data scalable runs on commodity hardware In addition, I look for these qualities, though they are not "requirements": Stable, mature file system Lots of momentum and support etc I would like some input as to which file system works best for the given requirements. Some people at my organization are leaning towards MogileFS, but I'm not convinced of the stability and momentum of that project. GlusterFS and Lustre, based on my limited research, appear to be better supported... Thoughts?

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  • Resizing Images In a Table Using JavaScript

    - by Abluescarab
    Hey, all. I apologize beforehand if none of this makes sense, or if I sound incompetent... I've been making webpages for a while, but don't know any JavaScript. I am trying to make a webpage for a friend, and he requested if I could write some code to resize the images in the page based on the user's screen resolution. I did some research on this question, and it's kind of similar to this, this, and this. Unfortunately, those articles didn't answer my question entirely because none of the methods described worked. Right now, I have a three-column webpage with 10 images in a table in the left sidebar, and when I use percentages for their sizes, they don't resize right between monitors. As such, I'm trying to write a JavaScript function that changes their sizes after detecting the screen resolution. The code is stripped from my post if I put it all, so I'll just say that each image links to a website and uses a separate image to change color when you hover over it. Would I have to address both images to change their sizes correctly? I use a JavaScript function to switch between them. Anyway, I tried both methods in this article and neither worked for me. If it helps, I'm using Google Chrome, but I'm trying to make this page as cross-browser as possible. Here's the code I have so far in my JavaScript function: function resizeImages() { var w = window.width; var h = window.height; var yuk = document.getElementById('yuk').style; var wb = document.getElementById('wb').style; var tf = document.getElementById('tf').style; var lh = document.getElementById('lh').style; var ko = document.getElementById('ko').style; var gz = document.getElementById('gz').style; var fb = document.getElementById('fb').style; var eg = document.getElementById('eg').style; var dl = document.getElementById('dl').style; var da = document.getElementById('da').style; if (w = "800" && h = "600") { } else if (w = "1024" && h = "768") { } else if (w = "1152" && h = "864") { } else if (w = "1280" && h = "720") { } else if (w = "1280" && h = "768") { } else if (w = "1280" && h = "800") { } else if (w = "1280" && h = "960") { } else if (w = "1280" && h = "1024") { } } Yeah, I don't have much in it because I don't know if I'm doing it right yet. Is this a way I can detect the "width" and "height" properties of a window? The "yuk", "wb", etcetera are the images I'm trying to change the size of. To sum it up: I want to resize images based on screen resolution using JavaScript, but my research attempts have been... futile. I'm sorry if that was long-winded, but thanks ahead of time!

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  • Removed password from Windows 7, now I cannot login using Remote Desktop

    - by Niels Brinch
    I removed the password from the only account on my Windows 7 computer and now I get the following message when I try to log in. "Possible reasons are blank passwords not allowed". I did some research and found out what I should have done (disable the policy to allow blank passwords) but now I'm already logged out and cannot get back in. Does anyone have any suggestions? Update Thanks for all the answers. I actually think the reason I couldn't login with blank password was because I was logging in with Remote Desktop. I had no idea that made a difference, so didn't think it would be relevant to mention. When I went directly on the physical computer, it did not stop me from logging in without a password.

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  • PacketFence Installation?

    - by Charles Miton
    So I've stumbled across PacketFence during my search for a decent Network Access Control system. After doing a little research about it's capabilities I've come to realize it's meets all the requirements that I was looking for. Unfortunately, being primarily a MS Administrator, I'm having many issues trying to successfully getting it up and running. Is there anyone or any place that has a step-by-step tutorial on how to do this? I love the prospect of using Open Source software, but need some help jumping this particular hurdle. I'm trying to use CentOS for the OS but I'm open to alternatives if thats what it takes to get this system up and running.

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  • How to OCR PDF files with Old German Gothic (Fraktur) text?

    - by Jason
    I have been successfully using Adobe Acrobat X to OCR many scanned documents which I use for my research. However I have begun studying old German documents which use the Fraktur script, also known as Gothic. SuperUser won't let me post an image of it, but you can find examples of what it looks like in the Wikipedia article (linked above). I have read about special programs which OCR the text, such as ABBY FineReader für Fraktur, but first it works on Windows (and I use a Mac), and second I'd like to find a Fraktur plugin for Acrobat to fit into my already-existing workflow. Are there any Fraktur OCR plugins for Acrobat? Generally, where should one look for Acrobat OCR plugins?

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  • disable 250 character URL limit in Internet Explorer

    - by Keltari
    Users of a SharePoint Document Library are getting this error: The URL for this file is too long for the application. A temporary copy of this file will be opened on your computer. You must save this copy as a new file. After doing some research, it appears Internet Explorer has a limit of about ~250 characters for a URL. Some URLs provided by SharePoint far exceed this limit. One example being 790 characters long. Is there a way to disable this limit? I have looked, but there doesnt appear to be a solution, other than shortening the folder/path names.

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  • Make a file non-deletable in USB

    - by MegaNairda
    Somebody used my USB drive and upon returning it to me, I found a autorun.inf that is undeletable. I tried changing it's file attribute which is only H (not even set as a system file) but it keeps on saying Access Denied. The USB is set on FAT32, upon asking my friend, he told me that he uses Panda USB Vaccine http://research.pandasecurity.com/Panda-USB-and-AutoRun-Vaccine/ How do they do this? Im trying to use some Disk Sector editor but have no idea which hex file they change to make this kind of file and make it deletable again. Formatting the drive removes it, but I'm curious as to how to be able to set those kind of file attribute.

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  • HP Laserjet "maintenance interval" vs "fuser life"

    - by marienbad
    I posted a question about the Laserjet 8100DN earlier here: http://serverfault.com/questions/139043/buying-an-old-laser-printer-what-will-need-to-be-replaced and from doing some more research I have a new question: I found the "maintence interval" -- "the interval at which you should install a maintenance kit" (which is a fuser and rollers), and it is...350,000 pages. BUT, when I look at the specs for an HP 8100 fuser, it says the fuser has a life span of 150,000 pages. What gives? – Will the fuser go bad after 150 or 350? ==== BTW I hope it's ok to ask another similar question in a new thread -- I'm just following instructions from my thread on the topic at Meta.

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  • ldap sync with outlook

    - by Dr Casper Black
    I have a task to research the possibilities of LDAP as a centralized Address Book. I have setup a openLDAP on debian 5.07. I managed to search the LDAP contacts from MS Outlook 2007 (with some drawbacks like Outlook cant recognize street and organization fields). My question is, is it possible ,& how, to sync data on LDAP server with applications that support LDAP? I could not find any data on this topic. EDIT: The point is, to have a centralized list of contacts that can be sync with various applications, for instance Outlook, Thunderbird, Phonebook on mobile phones...etc The Question is, Is it possible to transfer (update) data on a client application from LDAP database and viceversa? So not to search LDAP server data, but to download contact that are not available in the client application (Outlook) and upload data to LDAP if the contact is in (Outlook) and not in LDAP database and the other way around, in other words synchronize.

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  • connect to ssh server thru 80 via HTTP proxy?

    - by im_chc
    Hi, Please help: I want to connect to my ssh server at home However, I'm behind a corporate (CORP) firewall, which blocks almost all ports (443, 22, 23 etc). But it seems that 80 is not blocked, coz I am able to surf the web after I login (i.e. IE sets to CORP's proxy server, and start IE - displayed CORP intranet portal - type in google.com - dialog pops up for userid + pwd - login successful, and surf without restrictions) My ssh server listens at 443. My question is: Is there a way to connect from a computer behind the CORP firewall to the ssh server thru the 80 port, with the ssh server still listening on port 443? Changing the ssh server to listen to port 80 is not an option, coz my home ISP blocks 80. Can I use a public proxy which listens at 80? After some research on google I found that there is something called "connect to SSH thru an HTTP proxy" using the Cockscrew software. Is it useful? Or is there some other way to solve the problem?

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  • Private key authentication with pam_ldap

    - by Gareth
    I'd like to set up pam_ldap on some of our servers so that we can centrally manage who has access to which server, and easily revoke access if e.g. someone leaves the company. I've done some research and got this working. Hooray! However I'd also like to be able to use public-private key logins - i.e. allow users to store their public keys in the LDAP directory and have these work for logins too. I can't find any documentation about being able to do this, but I also can't find any reasons that it shouldn't be possible. Is there a way to do it, or is there some fundamental reason that it won't work?

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