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  • How to run a command in a process that is not a child of the current process?

    - by amicitas
    I am having a library conflict issue with calling an external program from within a interpreted programming environment (IDL). The issue seems to be that since the program I am calling ends up as a child of IDL, libraries are not being reloaded. From within IDL I can launch sub-processes either directly or using a shell. Is there a good way that I can cause my program to be run without ending up as a child process? The only solution I have found so far is to use ssh localhost my_program. This works perfectly but I would like a more direct solution.

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  • Building intranet search

    - by gmkv
    At work, we have lots of information squirreled away in many different sites -- wikis, product docs, ticketing system, etc -- many of which require authentication. I'm very interested in having a single way to search all our various silos, and in my spare time have looked at Nutch, Grub, Django + Haystack, etc. None of these is a complete solution a la Google Mini or Google Search Appliance. Has anybody built a basic intranet search engine out of a mixture of these tools? Would you have recommendations about how to go about it? I like Django, and Haystack seems to be a mildly popular search solution for it, but I'd need to wire up a crawler that can support crawling authenticated sites to it.

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  • Merging similar graphs based solely on the graph structure?

    - by Buttons840
    I am looking for (or attempting to design) a technique for matching nodes from very similar graphs based on the structure of the graph*. In the examples below, the top graph has 5 nodes, and the bottom graph has 6 nodes. I would like to match the nodes from the top graph to the nodes in the bottom graph, such that the "0" nodes match, and the "1" nodes match, etc. This seems logically possible, because I can do it in my head for these simple examples. Now I just need to express my intuition in code. Are there any established algorithms or patterns I might consider? (* When I say based on the structure of the graph, I mean the solution shouldn't depend on the node labels; the numeric labels on the nodes are only for demonstration.) I'm also interested in the performance of any potential solutions. How well will they scale? Could I merge graphs with millions of nodes? In more complex cases, I recognize that the best solution may be subject to interpretation. Still, I'm hoping for a "good" way to merge complex graphs. (These are directed graphs; the thicker portion of an edge represents the head.)

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  • WHM Backup recommended?

    - by user77284
    I have a VPS (CentOS) with WHM, about 25 GB. It has about 20 accounts on it. I am looking to effectively back it up. My thoughts: Back it up with WHM Backup locally. Use Rsync to mirror it to another server. My questions: Is WHM Backup a good solution? How can I keep several backups while keeping a minimal amount of space? Is there a different solution, I should consider? I am not an expert, so I want something simple that works with minimal maintenance. Thanks.

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  • Building My First JavaFX Application Using Netbeans 7.1

    - by javafx4you
    Angela Caicedo, Oracle Technology Evangelist for JavaFX, has released a series of videos demonstrating how to build a simple JavaFX application using Netbeans 7.1. This video series is a great introduction to using JavaFX and takes the viewer through easy to follow, step-by-step instructions, including example code and showing the results along the way. These videos are highly recommend to anyone who is new to JavaFX and is looking for a quick getting started guide.  The first video provides an introduction to the the application and shows viewers the end result of the exercises that will be demonstrated throughout the series. The second video (Part 1) demonstrates how to get started creating the application from an empty project to build your first JavaFX application in Netbeans 7.1. Instructions include defining the components, creating and inserting image packages, adding the resources you want to make available in your application, setting the clipping area for you image, and setting the style for your image to create a transparent window. The third video (Part 2) demonstrates how to handle events and binding in the sample application using JavaFX. Watch the first 3 episodes now and stay tuned for future installments in this series on the Java YouTube channel.

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  • Can a mapped network drive be reconnected from the command line?

    - by Stephen Jennings
    On a daily basis I find myself in the Windows command prompt needing to access a network drive that is mapped but disconnected. I have yet to find a command that will reconnect this drive without unmapping and remapping (which leads to a password guessing game, since I don't own these computers). I would also like to be able to script this so every night the drive is reconnected if it has become disconnected somehow. The fastest solution I currently have is to: Type "start." to open explorer, Alt-D to focus the address bar, type the drive letter I want and press enter, and wait for it to display the drive contents, then finally, close explorer and go back to the command prompt. I know it's a minor inconvenience, but I'm often doing this through a slow VNC or PCAnywhere connection where doing anything through GUI is awful, so I'm just wondering if there's a better solution.

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  • On Developing Web Services with Global State

    - by user74418
    I'm new to web programming. I'm more experienced and comfortable with client-side code. Recently, I've been dabbling in web programming through Python's Google App Engine. I ran into some difficulty while trying to write some simple apps for the purposes of learning, mainly involving how to maintain some kind of consistent universally-accessible state for the application. I tried to write a simple queueing management system, the kind you would expect to be used in a small clinic, or at a cafeteria. Typically, this is done with hardware. You take a number from a ticketing machine, and when your number is displayed or called you approach the counter for service. Alternatively, you could be given a small pager, which will beep or vibrate when it is your turn to receive service. The former is somewhat better in that you have an idea of how many people are still ahead of you in the queue. In this situation, the global state is the last number in queue, which needs to be updated whenever a request is made to the server. I'm not sure how to best to store and maintain this value in a GAE context. The solution I thought of was to keep the value in the Datastore, attempt to query it during a ticket request, update the value, and then re-store it with put. My problem is that I haven't figured out how to lock the resource so that other requests do not check the value while it is in the middle of being updated. I am concerned that I may end up ticket requests that have the same queue number. Also, the whole solution feels awkward to me. I was wondering if there was a more natural way to accomplish this without having to go through the Datastore. Can anyone with more experience in this domain provide some advice on how to approach the design of the above application?

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  • "No input file specified" - unable to access phpMyAdmin using debian squeeze

    - by guiltybyintent
    I have installed phpMyAdmin on my VPS LAMP server (Debian Squeeze/Apache2/MySQL/PHP5), but am unable to access it: //my-ip/phpmyadmin/ and //my-domain/phpmyadmin/ both produce the following error message: "No input file specified". The phpMyAdmin FAQ identifies this as a permission problem, but the suggested solution seems not to apply to my situation. Every other solution I have come across involves removing/purging and reinstalling phpmyadmin - which I have done several times, always to the same result. Previous posts in this forum typically relate to Nginx, which I have not installed. Thanks in advance for any help!

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  • Raid1+0: create stripe over two /dev/mdx on partition or not?

    - by Chris
    Given that I haven't found a way to define how a Raid10 is created with mdadm, i went the Raid1+0 solution. How to display/define Mirror/Stripping pairs with mdadm mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda1 /dev/sdf1 mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sdg1 /dev/sdh1 mdadm --create /dev/md10 --level=0 --raid-devices=2 /dev/md0 /dev/md1 My question is about the stripe. For the mirror I create a primary partition over the full HD and set partition type to FD. So, should I do the same for the Stripe? Create partition on /dev/md0 and /dev/md1 (primary over full 'HDD', set partition type correctly) and then do the stripe on the partition? Is there a correct way here or are there any advantages/disadvantages to a solution? Thank you

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  • How do I disable Windows Search Indexing Service while on battery on Windows 7?

    - by Slaggg
    Since upgrading from Windows XP to Windows 7, I've found laptop battery life is reduced. One issue is that the Windows Search Indexing Service is constantly running, even when on battery power. Using Resource Monitor shows it is often the top consumer of CPU time and top producer of disk activity. I imagine this is one of the primary reasons the battery is getting drained faster. I cannot find any options to tell Windows Search Indexing Service to not index while on battery power. The only solution seems to be to stop the service, and also disable the service (if you just stop it, it will restart itself after a while). Doing this gives me considerably more battery life, but it's a pain because I have to re-enable the service when plugged in again. Is there a better solution?

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  • Load-balanced Linux server across internet?

    - by LinuxGnut
    I'm investigating setting up a load balanced server solution consisting of three CentOS 5.4 boxes. Two of these boxes will reside in one facility, while a third will reside in a different facility. I'm currently working to set up heartbeat, ldirectord, ipvsadm to load-balance the machines, but I'm not sure its going to work with I'm not overly familiar with the details behind how all of these work, but is the load balancing going to work correctly when these servers are not all on the same LAN? I'm not sure if heartbeat is using SNMP to send signals or not, which would only work over a LAN. Has anyone tried this or found a different solution?

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  • How to structure reading of commands given at a(n interactive) CLI prompt?

    - by Anto
    Let's say I have a program called theprogram (the marketing team was on strike when the product was to be named). I start that program by typing, perhaps not surprisingly, the program name as a command into a command prompt. After that, I get into a loop (from the users standpoint, an interactive command-line prompt), where one command will be read from the user, and depending on what command was given, the program will execute some instructions. I have been doing something like the following (in C-like pseudocode): main_loop{ in=read_input(); if(in=="command 1") do_something(); else if(in=="command 2") do_something_else(); ... } (In a real program, I would probably encapsulate more things into different procedures, this is just an example.) This works well for a small amount of commands, but let's say you have 100, 1000 or even 10 000 of them (the manual would be huge!). It is clearly a bad idea to have 10 000 ifs and else ifs after each other, for instance, the program would be hard to read, hard to maintain, contain a lot of boilerplate code... Yeah, you don't want to do that, so what approach would you recommend me to use (I will probably never use 10 000 commands in a program, but the solution should, at least preferably, be able to scale to that kind of massive (?) problems. The solution doesn't have to allow for arguments to the commands)?

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  • centos server shared files

    - by Kyle Hudson
    Hi, I am wanting to implement a multi-server specialised hosting environment. I currently have a cloud solution comprising of 3 centos boxes (2 lamp web servers, 1 mysql). What I am wanting to do is, implement a 5 server solution where they is 3 web servers, 1 mysql box and a fileshare. Basically I want the fileshare to host all the web files for the servers, the caching will remain on the individual servers and the sessions will be stored in mysql. So what I am asking is how do I map the servers to share the same "docroot"? Is it NFS? if so whats the best way about doing this? Thanks in advance.

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  • Architecture for dashboard showing aggregated stats [on hold]

    - by soulnafein
    I'd like to know what are common architectural pattern for the following problem. Web application A has information on sales, users, responsiveness score, etc. Some of this information are computationally intensive and or have a complex business logic (e.g. responsiveness score). I'm building a separate application (B) for internal admin tasks that modifies data in web application A and report on data from web application A. For writing I'm planning to use a restful api. E.g. create a new entity, update entity, etc. In application B I'd like to show some graphs and other aggregate data for the previous 12 months. I'm planning to store the aggregate data for each month in redis. Some data should update more often, e.g every 10 minutes. I can think of 3 ways of doing this. A scheduled task in app B that connects to an api of app A that provides some aggregated data. Then app B stores it in Redis and use that to visualise pages. Cons: it makes complex calculation within a web request, requires lot's of work e.g. api server and client, storing, etc., pros: business logic still lives in app A. A scheduled task in app A that aggregates data in an non-web process and stores it directly in Redis to be accessed by app B. A scheduled task in app A that aggregates data in a non-web process and uses an api in app B to save it. I'd like to know if there is a well known architectural solution to this type of problems and if not what are other pros/cons for the solution I've suggested?

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  • xen 4.0 squeeze fails to start guests with: launch_vm: SETVCPUCONTEXT failed

    - by mcr
    As Chris Benninger says over at: http://www.benninger.ca/?p=58 lots and lots of people have the problem with Squeeze and xen4.0 telling them: launch_vm: SETVCPUCONTEXT failed (rc=-1) but nobody seems to know what the solution is. I don't know either, but at least here, a solution might get recorded. In my case, I can start one guest machine. An identical configuration for a second machine fails. Whichever one I start first, is the one that runs, the other gets the error. I've got at least a dozen other systems (at my work) running great with Squeeze and 64-bit XEN, but not this new machine at home.

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  • Automatic profile load on boot

    - by AnthonyW
    Is there any way to configure a computer to login automatically at bootup and then IMMEDIATELY switch users? The purpose is to trigger the profile loading process for the assumed user so that when they go to login, their profile loads instantaneously. Yet, the immediate user switch means that the login password is still required before any actual use. A few of the attempts I have made require storing the password in plain-text for the system to use. Needless to say that is undesireable. I have been looking for this solution for years; if anyone knows of a better solution to skinning this cat I am all ears. EDIT: tsdiscon command will Lock the workstation.

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  • How do I force the system to look for new sound devices?

    - by John Zeringue
    I have a small flat screen TV (Toshiba) that I often connect via HDMI to my laptop (an HP Pavilion dv4) and use as a computer monitor. When I do this, I prefer to use the TV's speakers, particularly when I'm watching video, because the sound quality is much better. However, when I connect the HDMI cable after turning on my computer (rather than having it plugged in before booting up), Sound Settings does not list the TV as an output device, and I am forced to reboot. I was curious if there is an easier solution to this, perhaps a CLI command to check for new sound outputs. Does anyone know of something like this or have another solution? To clarify, I believe this is a software problem. The HDMI always works, and I can switch my desktop over to the TV at any time. The issue is that, if the HDMI wasn't connected during start up, the TV will not appear as an output option in the Sound Settings GUI. So, unless I'm mistaken, my question is not HDMI specific, but rather a general usage question about manipulating sound settings from the command line.

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  • Hard Disk recovery

    - by Shaihi
    I have 3 disks of the same type model and year of production. All the disks were used part of a generic solution of an IBM server solution. My problem is that all 3 disks suffered the same malfunction at the same exact time and are now dis-functional. I went to two different expert's laboratories and got the same answer: To recover the data they need another identical disk from which they can take spare parts. Can my case really be that clinical? Anyway, I am not sure if this question belongs to this forum, but I am looking to buy the following disk: IIBM ESERVER XSERIES IBM P/N 24P3707 IBM FRU 24P3708 146.8GB USCSI 10K RPM PART NOMBER 9V2005-027 I already bought a disk with the same part number, but the labs said that apparently I need a disk that was manufactured in the same factory. That means that all the numbers have to be exactly the same. If anybody know where I can purchase such a disk (the information on the lost disks is really important to me), please tell me the place.

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  • QueryUnit 0.0.0.8 – Trust No One

    - by Davide Mauri
    Yesterday I’ve release an updated version of QueryUnit, the version 0.0.0.8. QueryUnit now supports AreNotEqual, Greater, and Less assertions and is more capable of managing strings results. I must say that I cannot live anymore without a proper Unit Testing of a BI solution. Just yesterday happened that one of the unit tests at a customer site failed showing a subtle situation where the release of a new version of custom application would have corrupted the source of BI data with a very low chance that someone would have noticed it before several days. It may happen when you have more the 15 systems that handles the data needed by your BI solution. The key message of this situation is “Trust No One”: if your data hasn’t passed quality testing it’s not trustable. Period. QueryUnit is now officialy an hero :) No superpowers still, but useful above all. http://queryunit.codeplex.com/ Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Identifying elements from data feeds generated by affiliate sites

    - by SPI
    I am working with data feeds from affiliate sites. The basic idea is to provide an interface where the user can paste a link to an XML datafeed (these are huge btw, around 60 mb) that would then be streamed, parsed into small chunks, and mined for the required data which would then be stored in the database. The problem is that different affiliate sites have different Schemas for their XML's. It is a little hard mapping the elements in an XML to your database attributes when you don't actually know which element contains what. My Solution: Use XPath to traverse through the first set of parent and it's descendent's, fetch the elements as well as the data and and ask the user to map this data to the attributes in the database by selecting from a set of radio buttons that represent the attributes from the database. This will be done just once for each new Feed, once the system know's what's what it will automatically upload the data from the XML to the database. Does this sound viable? Is there a better solution? I realize this leaves an uncomfortable opening for human error.. Thanks.

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  • Migrating to a new server

    - by KThompson
    I was asked by a client to move a website to a new server. Normally I would make a local copy by downloading it and then uploading it to the new server after making any necessary configurations of course. This particular client has like 1 million images ranging up 1MB and I still haven't found a solution as to how to move these properly. I have tried zipping them on the server first but the file gets too big and it seems to just stop. Anyway, the client told me he can set up a "portal" so I don't have to download and re-upload the files. I have never heard of this no can I find what this is. Any of you know something that fits this description or solution to my image problem? Thanks in advance

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  • Video streaming and internet browsing on different bands/frequency

    - by user47207
    I have a Netgear WDNR37000 which allows clients on a 2ghz or 5ghz to access the internet and see every client and device on the network. I have a computer with two nics, one that is in the 2ghz range and the other on the 5ghz range. My specific problem is that I would like to serve my video streams (hulu, ps3mediaserver, playon) to my ps3 on the 5ghz band while internet browsing is routed to the 2ghz band. This is so that the video streams aren't affected by general internet use. While the easiest solution would be to disable internet access on the 5ghz apn, I would like to know of a solution that would not require that.

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  • How do I get openssh to save my ssh identity permanently?

    - by Alliswell
    How do I change it to save my identity permanently? During my login session after I have entered: $ ssh-add Then identity is saved and I can connect via ssh without getting the dreaded: Enter passphrase for key Once I logout and login back-in I get the following when running: $ ssh-add -L The agent has no identities. $ ssh <hostname> Enter passphrase for key '/home/user/.ssh/id_rsa': Stackoverflow has the following solution, yet I do not understand the reference to in the config file: IdentityFile ~/.ssh/id_rsa_buhlServer Specifically I do not understand what I would put on the identity file. Would I put the above word for word? Or just add my file: IdentityFile ~/.ssh/id_rsa StackOverflow solution

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  • Any recommendations on a NAS for a home-super-user?

    - by marc_s
    Can anyone recommend a good NAS for use in a home-server environment? I would request at least 2, preferably 4 disks, and I am most interested in good to excellent throughput for file-server and backup purposes - don't need any of the fancy media-streaming or -sharing features, that's not of interest to me. For a 4 or more disk solution, support for the various RAID levels (0, 1, 1+0, 5) would be a plus - especially if supported in hardware (rather than just a software emulation). I just need a place to put my collection of data, ISO images, and so forth - and since several external disks (self-built and off-the-shelf) have failed so far, I'm looking into a more reliable solution. Marc

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