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  • Backing Up User Data when data is not in use. Should I be concerned?

    - by jberryman
    This may be a dumb question. I would like to use duplicity to make backups to Amazon S3 of directories, each of which contains a different user's data. Each directory could be written to at any time. So I have two questions: Should I be concerned that a scheduled backup of a directory might occur in the middle of data being written to files in the directory, resulting in a corrupted backup? And if that is a valid concern, how would I go about temporarily delaying an operation while IO was happening, to try to minimize that effect. Thanks for the advice

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  • Redirecting specific traffic to amazon AWS

    - by yoav r
    My server has recieved sudden increase in the (read) web traffic, requesting many map image tiles, and apache cannot handle it. Apache cannot even handle the redirections! The average load I get in my CentOS machine is more then 200.. Is there some software out there that can redirect SOME of the traffic, such as only the traffic from specific directory (such as http://example.com/maptiles/abc.png) to a different address (sucha as http://s3.amazonaws.com/mytiles/abc.png) ? can this be done by HAProxy?

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  • How to setup matlab for parallel processing on Amazon EC2?

    - by JohnIdol
    I just setup a Extra Large Heavy Computation EC2 instance to throw it at my Genetic Algorithms problem, hoping to speed up things. This instance has 8 Intel Xeon processors (around 2.4Ghz each) and 7 Gigs of RAM. On my machine I have an Intel Core Duo, and matlab is able to work with my two cores just fine. On the EC2 instance though, matlab only is capable of detecting 1 out of 8 processors. Obviously the difference is that I have my 2 cores on a single processor, while the EC2 instance has 8 distinct processors. My question is, how do I get matlab to work with those 8 processors? I found this paper, but it seems related to setting up matlab with multiple EC2 instances, which is not my problem. Any help appreciated!

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  • How do I include external Libraries in CodeIgniter?

    - by user259954
    I'm new to codeigniter, and I'm trying to integrate amazon's FPS into my page. There are a bunch of libraries and models that go with Amazon FPS, which I would need included to make the appropriate calls. How do I include them in CodeIgniter? I tried placing the entire Amazon folder inside the system/libraries directory, and then tried including libraries with $this-load-library( 'Amazon/FPS/Client' ); However, I run into problems with the relative path there, because Client.php contains the statement require_once ('Amazon/FPS/Interface.php'); ... which is in the same folder. There has to be a better way to do all this - can anyone please help? Thanks!!

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  • AWS ECS API - ItemLookup - Get item's (EAN) SalesRank by BrowseNode

    - by Lysender
    I'm using amazon japan, using ItemLookup. We already have the EAN numbers (used as ItemId). It was working well until we need to modify the SalesRank. The previous SalesRank returned is for the whole SearchIndex, ex: Books, Music, etc. What we want is to get the SalesRank for a specific BrowseNode. I don't know but it seems that it is not implemented on Amazon US. For example: http: // www . amazon . com / Slackware-Essentials-Cantrell-Johnson-Lumens/dp/1571763384/ref=sr_1_1?ie=UTF8&s=books&qid=1276142663&sr=1-1 The book above only shows the SalesRank (Bestsellers Rank) but on Japan Amazon: http://www.amazon.co.jp/Slackware-Linux-Dummies/dp/0764506897/ref=sr_1_4?ie=UTF8&s=english-books&qid=1276142708&sr=1-4 It shows SalesRank for other three different BrowseNodes. We need to get the SalesRank for a specific BrowseNode for a given ItemId or by any other means. Any ideas guys? TIA

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  • Microsoft launches two new Data Centres for Azure in US to meet growing demand

    - by Gopinath
    In order to meet the growing demand for Windows Azure in US, Microsoft has launched two new data centres in US – East US and West US. With the addition of these two data centres the number of Azure data centres across the globe has grown to 8 and 4 among them are located in US. The two new data centres are providing Computer and Storage resources and few enthusiastic customers already deployed their applications. The other services like SQL Azure and AppFabric will be offered by these data centres in the coming months. The addition of new data centres is a good sign to Microsoft as the customer demand for their Cloud offering is growing. Amazon Web Services is the pioneer in Cloud Computing and they offer wider range of Cloud Services compared to Microsoft. Source: Windows Azure Blog

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  • How to spread XML Sitemaps over several webservers behind AWS loadbalancer?

    - by Jurik
    We have a web portal with almost a million products and way more other urls. I wrote a script that checks database. If there is a new url needed or an old one update, this script will update/create the XML Sitemaps. But we have several servers behind the load balancer at our rented AWS space. Further this script checks database for each url if there was an update so that it updates the appropriate xml file too. My question is how to spread those XML Sitemaps over all webservers behind this AWS load balancer? Our approaches/ideas: we could just generate them on one server with a cron job and copy them to the other servers, but this could be difficult because of automatic raising numbers of servers and so on. we put them on our S3 - but this one is not avaible thru our domain, so I guess google will have a problem with it I let my script run on every webserver but change it in a way that it will generate each time all xml files if they do not exist. But then I would have conflicts with updated URLs in my database, where I saved timestamp of last changed value of every url Is there another - better - solution that I do not know? Are there any special services by amazon for such cases?

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  • Why was libhal removed in Ubuntu 13.10?

    - by I-Jo
    After installing 13.10, I realized libhal was no longer a sudo apt-get install away... in fact it was no longer anywhere to be found (except in the Raring Repos). And installing libhal from the raring repos is not the best option. It is the best workaround for not having it. Why was it removed? Was it an accidental removal, or is it no longer going to be included in the repos, even in the next LTS? I ask because Amazon (and other services) require it to be installed.

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  • replacing kernel on non-booting ec2 instance

    - by TheToolBox
    So I had an amazon ec2 instance crash during the update to 14.04LTS. Frustratingly, it appears the kernel might be bad (or at least that's what the log below says to me, I could totally be wrong). I'm able to mount the volume to another, working server, chroot the broken volume, and sudo apt-get remove linux-headers-3.MOSTRECENT. Unfortunately though, when I try sudo update-grub, it comes back with /usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?). What am I missing? Here's the log from the server's attempted bootup: [H[J Booting 'Ubuntu 14.04 LTS, memtest86+' root (hd0) Filesystem type is ext2fs, using whole disk kernel /boot/memtest86+.bin ============= Init TPM Front ================ Tpmfront:Error Unable to read device/vtpm/0/backend-id during tpmfront initialization! error = ENOENT Tpmfront:Info Shutting down tpmfront xc: error: panic: xc_dom_core.c:621: xc_dom_find_loader: no loader found: Invalid kernel xc_dom_parse_image returned -1 close(3) Error 9: Unknown boot failure Press any key to continue... Thanks in advance!

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  • How do I configure Mediawiki on EC2 if anonymous browsing is disabled?

    - by Feasoron
    So I have new MediaWiki instance install on a brand new Amazon EC2 instances. All is going swimmingly, until I have to log in via the web browser to configure it. Since I'm running on a hosted server, I can't hit http://localhost/mediawiki/config/index.php like the instructions say to. If I try to hit it via http://<My IP address>/mediawiki/config/index.php, my browser just tries to download the file because anonymous browsing isn't enabled. I seem to be before LocalSettings.php is created, so I don't know how to move forward from here.

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  • Whats the best cloud backup solution for a small scale server envoirnment?

    - by nbv4
    I have a server that runs a postgres database that contains about 200MB of data. Currently I have a cron job setup on my home computer which: ssh's into my server runs a remote script which makes a backup of the database scp's that dump over to my local hard drive for storage. Each dump is 20MiB. does this every six hours (one months of backups is roughly 2GiB) The problem with this setup is that if my local machine goes down for whatever reason, no backups will be made. Also, I can't have the cron run from the server, because I can't have it scp'd to my local machine from my server (firewalls and all that crap). My local machine is running Ubuntu 10.04, and my server is Ubuntu 9.10 server edition. I looked into Ubuntu One, but currently it's gui-only. I also looked into dropbox, but it's a pain in the ass to get setup in linux without gui support. Amazon S3 looks good but it's not free (yet dirt cheap). Is there any other alternative that I should look into? I'd prefer something where I can just have my script dump the database into a directory, and have the backup service 'watch' that folder and sync accordingly. I can maybe also have my local machine sync to the cloud backup so I have even more redundancy, plus easy access to my backups for use in testing.

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  • Whats the best cloud backup solution for a small scale server environment?

    - by nbv4
    I have a server that runs a postgres database that contains about 200MB of data. Currently I have a cron job setup on my home computer which: ssh's into my server runs a remote script which makes a backup of the database scp's that dump over to my local hard drive for storage. Each dump is 20MiB. does this every six hours (one months of backups is roughly 2GiB) The problem with this setup is that if my local machine goes down for whatever reason, no backups will be made. Also, I can't have the cron run from the server, because I can't have it scp'd to my local machine from my server (firewalls and all that crap). My local machine is running Ubuntu 10.04, and my server is Ubuntu 9.10 server edition. I looked into Ubuntu One, but currently it's gui-only. I also looked into dropbox, but it's a pain in the ass to get setup in linux without gui support. Amazon S3 looks good but it's not free (yet dirt cheap). Is there any other alternative that I should look into? I'd prefer something where I can just have my script dump the database into a directory, and have the backup service 'watch' that folder and sync accordingly. I can maybe also have my local machine sync to the cloud backup so I have even more redundancy, plus easy access to my backups for use in testing. Edit: My server is a VPS, so what solution I end up using has to be 100% software based.

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  • 404 redirect with cloud storage

    - by Jeremy DeGroot
    I'm hoping to reach someone with some experience using a service like Amazon's S3 with this question. On my site we have a dedicated image server. And on this server, we have an automatic 404 redirect through Apapche so that, if a user tries to access an image that doesn't exist, they'll see a snazzy "Image Not Available" image. We're looking to move the hosting of these images to a cloud storage solution (S3 or Rackspace's CloudFiles), and I'm wondering if anyone's had any success replicating this behavior on a cloud storage service and if so how they did it.

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  • Sanitize Content: removing markup from Amazon's content

    - by StackOverflowNewbie
    I'm using Amazon Web Service to get product descriptions of various items. The problem is that Amazon's content contains mark up that is sometimes destructive to the layout of my web page (e.g. unclosed DIVs, etc.). I want to sanitize the content I get from Amazon. My solution would be to do the following (my initial list so far): Remove unnecessary tags such as div, span, etc. while keeping tags like p, ul, ol, etc. Remove all attributes from all the tags (e.g. seems like there are style attributes in some of the tags) Remove excess white space (e.g. multiple spaces, carriage returns, new lines, tabs, etc.) Etc. Before I go off trying to build my solution, I'm wondering if anyone has a better idea (or an already existing solution). Thanks.

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  • Online file storage similar to Amazon S3

    - by Joel G
    I am looking to code a file storage application in perl similar to amazon s3. I already have a amazon s3 clone that I found online called parkplace but its in ruby and is old also isn't built for high loads. I am not really sure what modules and programs I should use so id like some help picking them out. My requirements are listed below (yes I know there are lots but I could start simple then add more once I get it going): Easy API implementation for client side apps. (maybe RESTful but extras like mkdir and cp (?) Centralized database server for the USERDB (maybe PostgreSQL (?). Logging of all connections, bandwidth used, well pretty much everything to a centralized server (maybe PostgreSQL again (?). Easy server side configuration (config file(s) stored on the servers). Web based control panel for admin(s) and user(s) to show logs. (could work just running queries from the databases) Fast High Uptime Low memory usage Some sort of load distribution/load balancer (maybe a dns based or pound or perlbal or something else (?). Maybe a cache of some sort (memcached or parlbal or something else (?). Thanks in advance

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  • How does the Amazon Recommendation feature work?

    - by Rachel
    What technology goes in behind the screens of Amazon recommendation technology? I believe that Amazon recommendation is currently the best in the market, but how do they provide us with such relevant recommendations? Recently, we have been involved with similar recommendation kind of project, but would surely like to know about the in and outs of the Amazon recommendation technology from a technical standpoint. Any inputs would be highly appreciated. Update: This patent explains how personalized recommendations are done but it is not very technical, and so it would be really nice if some insights could be provided. From the comments of Dave, Affinity Analysis forms the basis for such kind of Recommendation Engines. Also here are some good reads on the Topic Demystifying Market Basket Analysis Market Basket Analysis Affinity Analysis Suggested Reading: Data Mining: Concepts and Technique

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  • CSS not displayed depending on page

    - by Kanjiroushi
    I have a friend that has a really strange issue with my website. When he clicks on http://www.copeo.fr/ the page displays fine but when he clicks on a link like www.copeo.fr/user/ the CSS is not applied even after a refresh. The raw html does display. I asked him to display the CSS that is hosted on amazon S3 hcopeoressources.s3.amazonaws.com/style/futurvert/style.css and it displays fine. The code validates on W3C validator so does the CSS. I am lost what could be the origin of the issue. Could it be its enterprise cache? configuration of IE7 on his machine? If it happens to someone else who could explain the issue to me, I am all hears. Thanks

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  • Bitmap issue in Samsung Galaxy S3

    - by user1531240
    I wrote a method to change Bitmap from camera shot : public Bitmap bitmapChange(Bitmap bm) { /* get original image size */ int w = bm.getWidth(); int h = bm.getHeight(); /* check the image's orientation */ float scale = w / h; if(scale < 1) { /* if the orientation is portrait then scaled and show on the screen*/ float scaleWidth = (float) 90 / (float) w; float scaleHeight = (float) 130 / (float) h; Matrix mtx = new Matrix(); mtx.postScale(scaleWidth, scaleHeight); Bitmap rotatedBMP = Bitmap.createBitmap(bm, 0, 0, w, h, mtx, true); return rotatedBMP; } else { /* if the orientation is landscape then rotate 90 */ float scaleWidth = (float) 130 / (float) w; float scaleHeight = (float) 90 / (float) h; Matrix mtx = new Matrix(); mtx.postScale(scaleWidth, scaleHeight); mtx.postRotate(90); Bitmap rotatedBMP = Bitmap.createBitmap(bm, 0, 0, w, h, mtx, true); return rotatedBMP; } } It works fine in another Android device, even Galaxy Nexus but in Samsung Galaxy S3, the scaled image doesn't show on screen. I tried to mark the bitmapChange method , let it show the original size Bitmap on screen but S3 also show nothing on screen. The information of variables in eclipse is here. The information of sony xperia is here. xperia and other device is working fine.

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  • amazon cloud vs rackspace cloud

    - by machaa
    Hi, I'm looking to take a dedicated server - in the process I read about Amazon Cloud computing & Rackspace Cloud Servers. Now I'm not sure which one to opt? Could somebody suggest - Performance & Price wise. Regards

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  • Security as a Service (SecaaS) for Amazon EC2

    - by Dave
    I'm looking for a security as a service (SecaaS) provider or open source solution for Amazon EC2 instances, however I can't seem to find much on Google or elsewhere so was wondering if anyone knows where I could find this service? Ideally I'm looking for something that offers virtual firewalls, email and web security and virtual spam prevention. If anyone has any information on SecaaS i'd appreciate it, Thanks in advance

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  • Rename file in Amazon Glacier

    - by Benjamin
    Is it possible to rename an archive in Amazon Glacier? The documentation says: After you upload an archive, you cannot update its content or its description. The only way you can update the archive content or its description is by deleting the archive and uploading another archive. That would lead me to think that it's not possible, but I'm not sure whether the file name is considered part of the archive description.

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  • Prefork or Worker MPM for amazon xlarge server?

    - by Netismine
    I'm trying to measure would it be better to have prefork or worker mpm apache module for the server I'm working on, which is Amazon X-Large 15 GB memory 8 EC2 Compute Units (4 virtual cores with 2 EC2 Compute Units each) and that will run a Magento website with about 50 active users at once. Site serves a lot of images and about 45 requests per page. Images sometimes hang, so it seems worker would be a better option? Thanks

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  • Accountability in a cloud infrastructure (Amazon, etc)

    - by WinkyWolly
    I was curious how companies such as Amazon would handle some sort of investigation that needed to look into data potentially stored on one of their on-demand nodes. What typically happens to data in an environment like this after the VM is destroyed (literally what happens on the disk / FS)? Would it actually be possible to recover data from a destroyed node? Just a curiosity :)

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