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• The Oracle Enterprise Linux Software and Hardware Ecosystem

  - by sergio.leunissen

  It's been nearly four years since we launched the Unbreakable Linux support program and with it the free Oracle Enterprise Linux software. Since then, we've built up an extensive ecosystem of hardware and software partners. Oracle works directly with these vendors to ensure joint customers can run Oracle Enterprise Linux. As Oracle Enterprise Linux is fully--both source and binary--compatible with Red Hat Enterprise Linux (RHEL), there is minimal work involved for software and hardware vendors to test their products with it. We develop our software on Oracle Enterprise Linux and perform full certification testing on Oracle Enterprise Linux as well. Due to the compatibility between Oracle Enterprise Linux and RHEL, Oracle also certifies its software for use on RHEL, without any additional testing. Oracle Enterprise Linux tracks RHEL by publishing freely downloadable installation media on edelivery.oracle.com/linux and updates, bug fixes and security errata on Unbreakable Linux Network (ULN). At the same time, Oracle's Linux kernel team is shaping the future of enterprise Linux distributions by developing technologies and features that matter to customers who deploy Linux in the data center, including file systems, memory management, high performance computing, data integrity and virtualization. All this work is contributed to the Linux and Xen communities. The list below is a sample of the partners who have certified their products with Oracle Enterprise Linux. If you're interested in certifying your software or hardware with Oracle Enterprise Linux, please contact us via [email protected] Chip Manufacturers Intel, Intel Enabled Server Acceleration Alliance AMD Server vendors Cisco Unified Computing System Dawning Dell Egenera Fujitsu HP Huawei IBM NEC Sun/Oracle Storage Systems, Volume Management and File Systems 3Par Compellent EMC VPLEX FalconStor Fusion-io Hitachi Data Systems HP Storage Array Systems Lustre Network Appliance OCFS2 PillarData Symantec Veritas Storage Foundation Networking: Switches, Host Bus Adapters (HBAs), Converged Network Adapters (CNAs), InfiniBand Brocade Emulex Mellanox QLogic Voltaire SOA and Middleware ActiveState ActivePerl, ActivePython Tibco Zend Backup, Recovery & Replication Arkeia Network Backup Suite BakBone NetVault CommVault Simpana 8 EMC Networker, Replication Manager FalconStor Continuous Data Protector HP Data Protector NetApp Snapmanager Quest LiteSpeed Engine Steeleye Data Replication, Disaster Recovery Symantec NetBackup, Veritas Volume Replicator, Symantec Backup Exec Zmanda Amanda Enterprise Data Center Automation BMC CA Unicenter HP Server Automation (formerly Opsware), System Management Homepage Oracle Enterprise Manager Ops Center Quest Vizioncore vFoglight Pro TeamQuest Manager Clustering & High Availability FUJITSU x10sure NEC Express Cluster X Steeleye Lifekeeper Symantec Cluster Server Univa UniCluster Virtualization Platforms and Cloud Providers Amazon EC2 Citrix XenServer Rackspace Cloud VirtualBox VMWare ESX Security Management ArcSight: Enterprise Security Manager, Logger CA Access Control Centrify Suite Ecora Auditor FoxT Manager Likewise: Unix Account Management Lumension Endpoint Management and Security Suite QualysGuard Suite Quest Privilege Manager McAfee Application Control, Change ControlIntegrity Monitor, Integrity Control, PCI Pro Solidcore S3 Symantec Enterprise Security Manager (ESM) Tripwire Trusted Computer Solutions

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• HTTP Headers: Max-Age vs Expires – Which One To Choose?

  - by Gopinath

  Caching of static content like images, scripts, styles on the client browser reduces load on the webservers and also improves end users browsing experience by loading web pages quickly. We can use HTTP headers Expires or Cache-Control:max-age to cache content on client browser and set expiry time for them. Expire header is HTTP/1.0 standard and Cache-Control:max-age is introduced in HTTP/1.1 specification to solve the issues and limitation with Expire  header. Consider the following headers.   Cache-Control: max-age=24560 Expires: Tue, 15 May 2012 06:17:00 GMT The first header instructs web browsers to cache the content for 24560 seconds relative to the time the content is downloaded and expire it after the time period elapses. The second header instructs web browser to expiry the content after 15th May 2011 06:17. Out of these two options which one to use – max-age or expires? I prefer max-age header for the following reasons As max-age  is a relative value and in most of the cases it makes sense to set relative expiry date rather than an absolute expiry date. Expire  header values are complex to set – time format should be proper, time zones should be appropriate. Even a small mistake in settings these values results in unexpected behaviour. As Expire header values are absolute, we need to  keep changing them at regular intervals. Lets say if we set 2011 June 1 as expiry date to all the image files of this blog, on 2011 June 2 we should modify the expiry date to something like 2012 Jan 1. This add burden of managing the Expire headers. Related: Amazon S3 Tips: Quickly Add/Modify HTTP Headers To All Files Recursively cc image flickr:rogue3w This article titled,HTTP Headers: Max-Age vs Expires – Which One To Choose?, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• 10 PowerShell One Liners

  - by BizTalk Visionary

  Here are a few one-liners that use NetCmdlets. Some of these I've blogged about before, some are new. Let me know if you have questions, which ones you find useful, or how you altered these to suit your own needs. Send email to a list of recipient addresses: import-csv users.csv | % { send-email -to $_.email -from [email protected] -subject "Important Email" –message "Hello World!" -server 10.0.1.1 } Show the access control list for a specific Exchange folder: get-imap -server $mymailserver -cred $mycred -folder INBOX.RESUMES –acl Add look and read permissions on an Exchange folder, for a list of accounts pulled from a CSV file: import-csv users.csv | % { set-imap -server -acluser $_.username $mymailserver -cred $mycred -folder INBOX.RESUMES –acl “lr”  } Sync system time with an Internet time server: get-time -server clock.psu.edu –set To remotely sync the time on a set of computers: import-csv computers.csv | % { Invoke-Command -computerName $_.computer -cred $mycred -scriptblock { get-time -server clock.psu.edu –set } } Delete all emails from an Exchange folder that match a certain criteria.  For example, delete all emails from [email protected]: get-imap -server $mailserver –cred $mycred | ? {$_.FromEmail -eq [email protected]} | %{ set-imap -server $mailserver –cred $mycred-message $_.Id -delete } Update Twitter status from PowerShell: get-http –url "http://twitter.com/statuses/update.xml" –cred $mycred -variablename status -variablevalue "Tweeting with NetCmdlets!" A test-path that works over FTP, FTPS (SSL), and SFTP (SSH) connections: get-ftp -server $remoteserver –cred $mycred -path /remote/path/to/checkfor* Don't forget the *.  Also, to use SSL or SSH just add an –ssl or –ssh parameter. List disabled user accounts in Active Directory (or any other LDAP server): get-ldap -server $ad -cred $mycred -dn dc=yourdc -searchscope wholesubtree     -search "(&(objectclass=user)(objectclass=person)(company=*)(userAccountControl:1.2.840.113556.1.4.803:=2))" List Active Directory groups and their members: get-ldap -server testman -cred $mycred -dn dc=NS2 -searchscope wholesubtree -search "(&(objectclass=group)(cn=*admin*))" | select ResultDN, member Display the last initialization time (e.g. last reboot time) of all discoverable SNMP agents on a network: import-csv computers.csv | % { get-snmp -agent $_.computer -oid sysUpTime.0 | %{([datetime]::Now).AddSeconds(-($_.OIDValue/100))} } Not mentioned here:  data conversion (Yenc, QP, UUencoding, MD5, SHA1, base64, etc), DNS, News Groups (NNTP/UseNet), POP mail, RSS feeds, Amazon S3, Syslog, TFTP, TraceRoute, SNMP Traps, UDP, WebDAV, whois, Rexec/Rshell/Telnet, Zip files, sending IMs (Jabber/GoogleTalk/XMPP), sending text messages and pages, ping, and more. Original Source: Lance's Textbox

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• How to generate xorg.conf? (X -configure segfaults)

  - by Nicolas Raoul

  My video card is working fine, I have no screen problem. I am trying to generate an xorg.conf so I did: [ Logout ] sudo service gdm stop [ Move away xorg.conf.back and xorg.conf.fglrx-0 that were in /etc/X11 ] sudo dpkg-reconfigure xserver-xorg sudo X -configure But this last command segfaults: X.Org X Server 1.7.6 Release Date: 2010-03-17 X Protocol Version 11, Revision 0 Build Operating System: Linux 2.6.24-27-server i686 Ubuntu Current Operating System: Linux nico 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:26:08 UTC 2010 i686 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-25-generic root=UUID=7447ab16-3406-442d-81e5-bb6a2d795205 ro quiet splash Build Date: 21 July 2010 12:47:34PM xorg-server 2:1.7.6-2ubuntu7.3 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.16.4 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Fri Oct 15 16:06:11 2010 List of video drivers: i740 ark geode siliconmotion mach64 s3 r128 apm intel neomagic vesa trident chips s3virge fglrx sis savage rendition i128 tseng ztv mga openchrome radeon ati nv v4l vmware cirrus tdfx nouveau sisusb voodoo fbdev (EE) Can't load FireGL DRM library (libfglrxdrm.so). Backtrace: 0: X (xorg_backtrace+0x3b) [0x80e938b] 1: X (0x8048000+0x61c8d) [0x80a9c8d] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0x34d410] 3: X (xf86CallDriverProbe+0x182) [0x80b82d2] 4: X (DoConfigure+0x1c8) [0x816b898] 5: X (InitOutput+0x1da) [0x80b98aa] 6: X (0x8048000+0x1ebbb) [0x8066bbb] 7: /lib/tls/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x467bd6] 8: X (0x8048000+0x1e961) [0x8066961] Segmentation fault at address (nil) Caught signal 11 (Segmentation fault). Server aborting Please consult the The X.Org Foundation support at http://wiki.x.org for help. Please also check the log file at "/var/log/Xorg.0.log" for additional information. ddxSigGiveUp: Closing log Note the line Can't load FireGL DRM library (libfglrxdrm.so) Note: I do have file /usr/lib/fglrx/xorg/modules/linux/libfglrxdrm.so It is strange that it segfaults whereas I can use Gnome with no problem but well... Might be related: I tried to install the driver from ATI's website recently, and from then glxgears crashes at start. How can I generate xorg.conf in those conditions? It might or might not involve solving the segfault problem.

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• SQL SERVER – Backup SQL databases to Box or SkyDrive

  - by Pinal Dave

  To ensure your SQL Server or Azure databases remain safe, you should backup your databases periodically. And it is important to store the backups in a reliable location. Microsoft SkyDrive currently offers 7GB free, Box offers 5GB free – both are reliable and it is simple to send your backups there. SQLBackupAndFTP in it’s latest version 9 added the option to backup to SkyDrive and Box ( in addition to local/network folder, NAS drive, FTP, Dropbox, Google Drive and Amazon S3). Just select the databases that you’d like to backup and select to store the backups in SkyDrive or Box. Below I will show you how to do it in details Select databases to backup First connect to your SQL Server or Azure Sql Database. Then select the databases you’d like to backup. Connect to SkyDrive or Box cloud If you have a free version of SQLBackupAndFTP Box destination is included, but SkyDrive destination will be disabled as it is available in the Standard version or above. Click “Try now” to get 30 days trial on all options On the “SkyDrive Settings” form you’ll need to authorize SQLBackupAndFTP to access your SkyDrive. Click “Authorize…” to open SkyDrive authorization page in your browser, sign in your to SkyDrive account and click at “Allow” . On the next page you will see the field with authorization code. Copy it to the clipboard. Box operation is just the same. After that return to SQLBackupAndFTP, paste the authorization code and click “OK” . After you are authorized, you can enter the path to a backup folder. SQLBackupAndFTP will create the folder if it does not exist. That’s all what has to be done to backup to SkyDrive or Box cloud.  You can now click on “Run Now” button to test this job. Conclusion Whatever is your preference for storing SQL backups, it is easy with SQLBackupAndFTP. Note that at the time of this writing they are running a very rare promotion on volume licenses: 5–9 licenses: 20% off 10–19 licenses: 35% off more than 20 licenses: 50% off Please let me know your favorite options for storing the backups. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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• Appointment & Booking Calendar for 2,500 Members

  - by D. K. Mason

  For this job I need a booking or appointment calendar for the WP website, so that each of the 2500+ members can manage his/her own appointments calendar. Members will set their schedules and available hours. Buyers can select one member, and book when they want to visit the member and reserve time online. Lets say our WP membership site has thousands of members each offering one service. We have 25 categories. On their profile page is his appointment or booking calendar, along with his personally created and uploaded (into S3) profile video. Website visitors should be able to easily book hours & days as desired. For now all members have a free membership. WE earn $ by bringing customers to the registered members and collecting one dollar for our service. Therefore, we need an affordable script and one that handles our members needs. We already have a paid copy of Jrox. What are those needs? Well, please register for a test account in the ENTERTAINMENT category at http://asianhighway26.com/?page_id=140 Next, pretend you are a buyer and start on the index page and select your ENTERTAINMENT category. Click on image #3 and you will receive a list of others in your traveling area. When you click VIEW DETAILS, there is where a potential customer will see the calendar and if you are available on the dates and times you are interested in doing business. We know that YOU the member will want to list your not available dates and hours. There may be other features desired but this is the most important, we believe. Our WP administrator (me) can install the main script, but each member must have some login or dashboard to manage his/her own calendar and work hours. Can you create or modify any appointment calendar software to do this? Can the jam.jrox.com software we own do this? As you can see here, we offer to pay for ideas you present that we use: asianhighway26.com/?page_id=126 D.K. Mason Chief Development Officer, Asian Highway Network, Tourism Division, Asia-Pacific Region (http://www.forums.doctormason.us/b-ah/)

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• How to set the monitor to its native resolution when xrandr approach isn't working?

  - by Krishna Kant Sharma

  I am trying to setup my Samsung syncmaster B2030 monitor in ubuntu 12.04. It's native resolution is 1600x900 which I am not getting in ubuntu and which I am trying to get. I tried using xrandr approach provided in these urls: 1) http://www.ubuntugeek.com/how-change-display-resolution-settings-using-xrandr.html 2) How to set the monitor to its native resolution which is not listed in the resolutions list? S1) I used cvt 1600 900 60 to get the modeline. Output was: # 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz Modeline "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync S2) I then used xrandr and output was: Screen 0: minimum 8 x 8, current 1152 x 864, maximum 8192 x 8192 DVI-I-0 disconnected (normal left inverted right x axis y axis) VGA-0 connected 1152x864+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0 + 1360x768 60.0 59.8 1152x864 60.0* 800x600 72.2 60.3 56.2 680x384 119.9 119.6 640x480 59.9 512x384 120.0 400x300 144.4 320x240 120.1 DVI-I-1 disconnected (normal left inverted right x axis y axis) HDMI-0 disconnected (normal left inverted right x axis y axis) which gave me "VGA-0". S3) Then I used xrandr --newmode "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync But instead of adding the modeline it just threw an error: X Error of failed request: BadName (named color or font does not exist) Major opcode of failed request: 153 (RANDR) Minor opcode of failed request: 16 (RRCreateMode) Serial number of failed request: 29 Current serial number in output stream: 29 My system details: 1) ubuntu 12.04 LTS 2) Graphic card: GeForce 9400 GT/PCIe/SSE2 (driver is successfully installed. I am checking it in System Settings Details. And it's showing that driver is installed and its "GeForce 9400 GT/PCIe/SSE2") 3) Monitor: Samsung syncmaster B2030 4) Resolutions I am getting: 800x600 1024x768 1152x864 (I am currently using this one) 1360x768 (this one isn't working properly) Does anyone know what I can do? Thanks in advance. UPDATE (1): Today I tried it again. And adding a modeline (using --newmode) worked. But when I used --addmode by: xrandr --addmode VGA-0 1600x900_60.00 It gave this error: X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 153 (RANDR) Minor opcode of failed request: 18 (RRAddOutputMode) Serial number of failed request: 29 Current serial number in output stream: 30

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• New computer hangs on shutdown/reboot, how to troubleshoot?

  - by Torben Gundtofte-Bruun

  My system is working perfectly but it freezes during shutdown/reboot/suspend/hibernate: All windows and the menu bar disappear but the desktop wallpaper remains. It doesn't even show the shutdown screen (the one with the animated dots) where I could hit ESC and watch the shutdown console text. The system is brand-new and fully updated using Update Manager. How can I determine what is causing the freeze? Is there a log I can investigate? How can I fix this? I see no obvious cause of the freeze. The only USB attachment is a mouse/keyboard; I don't have any external storage attached; and I don't have any programs running (the machine freezes even when doing shutdown right from the login screen). What I've tried so far: Based on other questions (this, this, and this) that suggest some ACPI settings, I've tried sudo shutdown -h now to see whether the shutdown console text display offers any hints, but the system doesn't even get that far - it still freezes while the screen shown the desktop background image, without any toolbars. Only sudo shutdown --force works, but that's not a solution. Editing the grub menu to add acpi=off to the kernel didn't help. I guess there's not much point in trying the other (lesser) ACPI suggestions? Adding noapic to the grub entry had no discernible effect. Adding nolapic instead did something (I had removed the quiet option) - the system managed to continue further with the shutdown, right until the line Checking for running unattended-upgrades: which were the last characters on the screen. I've also checked the system BIOS, especially regarding power options, but didn't see anything out of the ordinary. Switching the BIOS standby setting from S3 to S1 didn't help. The standby setting can't be disabled, and there are no other ACPI-related settings AFAIK. BIOS reset didn't help. Not surprised; hadn't changed anything. I tried going to a virtual console (CtrlAltF1) as suggested by djeikyb and from there did a shutdown -h now and it froze there too, after this console output. I didn't try killing processes one at a time because I'm still too newbie to figure out how to do that. Booting with kernel 2.6.35.22 rather than 2.6.35.25 didn't help. Disabling the Nvidia drivers didn't help. Booting from Live CD (USB stick in fact) didn't help; it freezes the same way. Booting from Live CD, with acpi=off noapic nolapic didn't help either. Neither did just nolapic. So evidently this is not some custom setting in my install, but some sort of basic issue. MemTest competed in 1 hour without errors.

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• How should I land my next consulting gig? [closed]

  - by MrOodles

  For the last couple of years, I've been working on speculative projects, expanding my skillset with side work, and paying the bills while having a blast consulting for startups. However, for a number of personal reasons, I need to spend the next 6-9 months maximizing my cash income. I want to put this into effect starting in early August. So that means I have one month to put the necessary client list/portfolio/resume together to start making this happen. As a programmer, I am very proficient in building Django web apps. I can write the necessary SQL, python, javascript, and css to build every part of a Django app, and then do the system administration necessary to deploy on AWS using EC2. I can also rig up a CDN to work seemlessly with the app using S3 and Cloudfront. I have built GIS applications using GeoDjango and PostGIS, and I have constructed social video apps by implementing Encoding.com as a service to prepare raw video files for consumption on the web. I am also moderately proficient in programming PHP, Java, and C#. I have built web apps in PHP, and desktop apps in Java and C#. I have dabbled with Android applications and iPhone apps, but nothing I would show off. I have experience doing SEO, social media marketing, and content marketing. Many of my clients have needed their apps promoted after they were built, and I was always happy to oblige when I could. I have also worked with biometrics technology including fingerprints for government contractors. This was as much a business analyst role as it was a programming gig, as I had to help answer RFPs, make checklists, and work around reems and reems of regulations to build applications that met very large bureaucratic requirements. I only have two real requirements for my next gig(s): 1) Work remotely. I live in North East Ohio, and I don't plan on leaving, but I wouldn't mind traveling one or two weeks out of every month to service clients who need on-site help. 2) $60.00hr-$∞ USD contracting rate. So what should I do for the next 30 days to achieve this? Should I target some large company and learn the requisite buzzwords to impress them? Should I learn some new language or technology? Polish some skill that I already have? Should I build something using my current skillset, or with some new technology? Should I put a website for my consultancy together to market myself? Should I do that using latest technology x, y, and z? Or should I just slap something up on Tumblr? I'm willing to do anything (moral) over the next 4 weeks to put myself into a position to maximize my income, and I'm open to all and every idea Programmers users may have. Let me hear them.

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• WCF Routing Service Filter Generator

  - by Michael Stephenson

  Recently I've been working with the WCF routing service and in our case we were simply routing based on the SOAP Action. This is a pretty good approach for a standard redirection of the message when all messages matching a SOAP Action will go to the same endpoint. Using the SOAP Action also lets you be specific about which methods you expose via the router. One of the things which was a pain was the number of routing rules I needed to create because we were routing for a lot of different methods. I could have explored the option of using a regular expression to match the message to its routing but I wanted to be very specific about what's routed and not risk exposing methods I shouldn't via the router. I decided to put together a little spreadsheet so that I can generate part of the configuration I would need to put in the configuration file rather than have to type this by hand. To show how this works download the spreadsheet from the following url: https://s3.amazonaws.com/CSCBlogSamples/WCF+Routing+Generator.xlsx In the spreadsheet you will see that the squares in green are the ones which you need to amend. In the below picture you can see that you specify a prefix and suffix for the filter name. The core namespace from the web service your generating routing rules for and the WCF endpoint name which you want to route to. In column A you will see the green cells where you add the list of method names which you want to include routing rules for. The spreadsheet will workout what the full SOAP Action would be then the name you will use for that filter in your WCF Routing filters. In column D the spreadsheet will have generated the XML snippet which you can add to the routing filters section in your configuration file. In column E the spreadsheet will have created the XML snippet which you can add to the routing table to send messages matching each filter to the appropriate WCF client endpoint to forward the message to the required destination. Hopefully you can see that with this spreadsheet it would be very easy to produce accurate XML for the WCF Routing configuration if you had a large number of routing rules. If you had additional methods in other services you can simply copy the worksheet and add multiple copies to the Excel workbook. One worksheet per service would work well.

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• Can I subnet a subnet?

  - by Portman

  Apologies in advance for the botched terminology. I have read the Server Fault Subnet Wiki but this is more of an ISP question. I currently have a /27 block of public IPs. I use give my router the first address in this pool and then use 1-to-1 NAT for all the servers behind the firewall, so that they each get their own public IP. The router/firewall is currently using (actual addresses removed to protect the guilty): IP Address: XXX.XXX.XXX.164 Subnet mask: 255.255.255.224 Gateway: XXX.XXX.XXX.161 What I would like to do is break out my subnet into two separate /28 subnets. And do this in a way that is transparent to the ISP (i.e., they see me as continuing to operate a single /27). Currently, my topology looks like: ISP | [Router/Firewall] | [Managed Ethernet Switch] / \ \ [Server1] [Server2] [Server3] (etc) Instead, I would like it to look like: ISP | [Switch] / \ [Router1] [Router2] | | | | [S1] [S2] [S3] [S4] (etc) As you can see, this would partition me into two separate networks. I'm struggling with what the correct IP settings would be on Router1 and Router2. Here's what I have right now: Router1 Router2 IP Address: XXX.XXX.XXX.164 XXX.XXX.XXX.180 Subnet mask: 255.255.255.240 255.255.255.240 Gateway: XXX.XXX.XXX.161 XXX.XXX.XXX.161 Note that normally you would expect Router2 to have a gateway of .177, but I'm trying to get them both to use the gateway originally given to me by the ISP. Is subnetting like this in fact possible, or am I completely botching the most basic concepts?

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• Server cost for smartphone app with web service

  - by FrankieA

  Hello, I am working on a smartphone application that will require a backend web service - but I have absolutely clueless to how much it will cost. Web Service will handle: - login of users - cataloging of our user base - holding minimal profile information for users (the only binary data is a display picture which will be < 20k each) - performing some very minor calculation/algorithm before return results - All the above will be communicated to server from a smartphone (iPhone/BlackBerry/Android) Bandwidth Requirements: - We want to handle up to 10k users throughout the day. - I predict 10k * 50 HTTP requests a day = 500,000 requests a day * 30 = 15 million requests a month Space Requirements: - Data will be in SQL database. - I predict 1MB/user * 10k = 10GB + overhead. In other words - space is not a big issue. Software Requirements: (unless someone knows an alternative) - Windows Server 2008 + IIS - MSFT SQL Server Note: This is 100% new to me, so please hit me with all you got. Do I need Windows Server or are there alternative? Is it better to get multiple cheap servers to distribute load? Will Amazon S3 work for me? How about Windows Azure? Thank you!!

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• Create Windows AMI with instance storage

  - by Jonathan Oliver

  I have a business use case and workflow where local/instance/ephemeral storage for an EC2 instance is ideal. Unfortunately I'm coupled to a Windows platform for this particular task and the EC2 Windows offering appears to have some deficiencies related to AMI creation. In essence, I'm trying to figure out if there's a way to attach local instance storage to a Windows EC2 instance using the typical command line interface (because the Amazon Website GUI doesn't support it) and then to somehow create an AMI based upon that. I've tried creating a snapshot and then creating a Windows AMI based upon the snapshot, but of course the docs say this is unsupported and makes an unbootable AMI. In short, here's what I'm trying to do: Be able to run a Windows instance (EBS/S3 instance doesn't matter) Attach local instance storage as drive D: Persist that configuration as an AMI such that I can start lots of them as necessary from either the GUI, command line, or REST API. Be able to take a launched instance, update software, shutdown, and create another AMI based upon that. Wash, rinse, repeat. One other potential option which isn't horrible, but isn't ideal is to create an AMI which has 2 EBS volumes already attached (system+apps and data). Essentially, every time I startup an instance based upon the AMI it'll create 2 new EBS volumes of pre-determined size. I'm trying to avoid that scenario if possible.

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• EC2 Configuration

  - by user123683

  I am trying to create a server structure for my EC2 account. The design I have chosen consists of 2 instances running in different availability zones, elastic load balancer, an auto-scaling group with cloudwatch monitoring configured and a security group defining rules for access to the instances. This setup is to support an online web application written in PHP. I am trying to decide what is a better policy: Store MySQL DB on a separate Instance Store MySQL DB on an attached EBS volume (from what i know auto-scaling will not replicate the attached EBS volume but will generate new instances from a chosen AMI - is this view correct?) Regards the AMI I plan to use a basic Amazon linux 64 bit AMI, and install bastille (maybe OSSEC) but I am looking to also use an encrypted file system. Are there any issues using an encrypted file system and communication between the DB and webapp i neeed to be aware of? Are there any comms issues using the encrypted filesystem on the instance housing the webapp I was going to launch a second instance or attach a second volume in the second availability zone to act as a standby for the database - I'm just looking for some suggestions about how to get the two DB's to talk - will this be a big task Regards updates for security is it best to create a recent snapshot and just relaunch and allow Amazon to install updates on launch or is the yum update mechanism a suitable alternative - is it better practice to relaunch instead of updates being installed which force a restart. I plan to create two AMI snapshots one for the app server and one for the DB each with the same security measures in place - is this a reasonable - I just figure it is a better policy than having additional applications that are unnecessary included in a AMI that I intend on using. My plan for backup is to create periodic snapshots of the webapp and DB instances (if I use an additional EBS volume instead of separate instances my understanding is that the EBS volume will persist in S3 storage in the event of an unexpected termination and I can create snapshots of the volume backup purposes). Thanks in advance for suggestions and advice. I am new to EC2 and I may have described unnecessary overkill but I want to try implement what can be considered a best practice solution so all advice is appreciated.

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• Best option for storage clustering

  - by sam

  I'm working on an application that requires a large amount of storage space and I want to handle storage 'in-house' (Much cheaper than, say, S3) so we will have multiple servers (Initially 4) with large amounts of storage (6TB each). The storage will need to be very flexible and configurable, each piece of data should be replicated on at least 2 servers and must be easily readable/writable from ether an API of a UNIX device/file/folder like a normal drive, I don't mind which. We must also be able to easily offload content to our HTTP CDN (Edgecast), it doesn't need to have built in HTTP support but if it doesn't I'm going to have to write something to get the files onto HTTP so they can be pulled by the CDN. I've looked at a lot of solutions including Eucalyptus Walrus OpenStack Object Storage MogileFS and some others which I can't remember All the servers will be running RHEL 6, they have 4x1.5TB drives which will be RAID1'd into a single partition. All the servers have 1GB/s connections between them and 100MB/s connections to the internet with unlimited bandwidth. They have 2x2.66ghz processors. I understand there isn't a single, perfect answer but it would be nice to get some pointers.

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• MySQL-Cluster or Multi-Master for production? Performance issues?

  - by Phillip Oldham

  We are expanding our network of webservers on EC2 to a number of different regions and currently use master/slave replication. We've found that over the past couple of months our slave has stopped replicating a number of times which required us to clear the db and initialise the replication again. As we're now looking to have servers in 3 different regions we're a little concerned about these MySQL replication errors. We believe they're due to auto_increment values, so we're considering a number of approaches to quell these errors and stabilise replication: Multi-Master replication; 3 masters (one in each region), with the relevant auto_increment offsets, regularly backing up to S3. Or, MySQL-Cluster; 3 nodes (one in each region) with a separate management node which will also aggregate logs and statistics. After investigating it seems they both have down-sides (replication errors for the former, performance issues for the latter). We believe the cluster approach would allow us to manage and add new nodes more easily than the Multi-Master route, and would reduce/eliminate the replication issues we're currently seeing. But performance is a priority. Are the performance issues of MySQL-Cluster as bad as people say?

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• Windows 2008 R2 AWS CloudFormation Elastic beanstalk configuration

  - by Webmonger

  I'm looking for some configuration advice. I have a need for a load balanced windows environment with shared media across all instances that are hosting the app. The best explanation i can give is that there will be multiple Windows 2008 server with IIS hosting the app going through an ELB to load balance. Users must be able to upload content (images, video etc...) to the site that will be hosted. When a user uploads media it needs to be kept on a shared location so all windows IIS instances can access the files, I can't host the files on S3 because of the app architecture so they need to be in a place where all IIS server will have access. In addition I need to run an update each IIS server instance that updates a local memory cache when SQL data is updated. I was thinking of a configuration like this: [ELB] - [Win 2008 IIS (multiple servers)] - [Win 2008 File & SQL Server(possibly RDS?)] Does this configuration make sense? If not could you provide an idea of how I should configure it. Thanks in advance

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• Amazon VPC NAT not working

  - by rpkelly

  I'm trying to create a NAT instance for my VPC to allow instances on private subnets connect to the internet (most importantly, S3). I tried following the instructions here: http://docs.amazonwebservices.com/AmazonVPC/2011-07-15/UserGuide/index.html?VPC_NAT_Instance.html . Unfortunately, the instances in the private subnet (call it 10.10.2.0/24) cannot reach the internet. I have done the following: Create a NAT instance (Amazon's ami-vpc-nat-1.0.0-beta.i386-ebs (ami-d8699bb1)) in public subnet (call it 10.10.1.0/24). Changed "Source / Dest Check" to disabled. Created a new entry in the default routing table (which is used by 10.10.2.0/24) and had it point to the ID of the newly created instance. Associated an Elastic IP address with the NAT instance. Allowed all outbound traffic on the security group of the NAT instance. Ensured that all traffic could pass between the two subnets. I've tried also doing this with an existing instance using iptables, but had no luck. And I have verified that sys.net.ipv4.ip_forward is 1, just in case anyone was wondering. And I still have no internet connectivity from the instances on 10.10.2.0/24. Does anyone have any suggestions?

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• Cause of slow download speed on a particular EC2 instance?

  - by James

  I have a networking issue I'm trying to solve. I have two EC2 instances, same zone, same type. On one of the two EC2 instances (the 'bad' instance), the download speed is really poor (200k/s), while on the other (the 'good' instance), the download speed is fine, comfortable at 30M/s +). To clarify, I'm talking about downloading files to the EC2 instance while ssh'd into the server, e.g running wget with a large file. I've tried different files, including S3 objects and a large linux ISO from elsewhere. Running ethtool eth0 only returns 'Link detected: yes' for both. When running ifconfig, both return the same for most part, aside from how the good instance shows no error packets yet the bad instance shows many: UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:168372370 errors:5075643 dropped:0 overruns:0 frame:0 TX packets:122116480 errors:0 dropped:0 overruns:0 carrier:0 Both servers are configured the same, at least were supposed to be. How can I go about diagnosing the cause for the slow download speed? Is there anything particular to EC2 instances that could cause this? Having trouble knowing where to start. Thanks for any help!

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• Shared files folder in Amazon Elastic Beanstalk environment

  - by por

  I'm working on a Drupal application, which is planned to be hosted in Amazon Elastic Beanstalk environment. Basically, Elastic Beanstalk enables the application to scale automatically by starting additional web server instances based on predefined rules. The shared database is running on an Amazon RDS instance, which all instances can access properly. The problem is the shared files folder (sites/default/files). We're using git as SCM, and with it we're able to deploy new versions by executing $ git aws.push. In the background Elastic Beanstalk automatically deletes ($ rm -rf) the current codebase from all servers running in the environment, and deploys the new version. The plan was to use S3 (s3fs) for shared files in the staging environment, and NFS in the production environment. We've managed to set up the environment to the extent where the shared files folder is mounted after a reboot properly. But... The Problem is that, in this setup, the deployment of new versions on running instances fail because $ rm -rf can't remove the mounted directory, and as result, the entire environment goes down and we need restart the environment, which isn't really an elegant solution. Question #1 is that what would be the proper way to manage shared files in this kind of deployment? Are you running such an environment? How did you solve the problem? By looking at Elastic Beanstalk Hostmanager code (Ruby) there seems be a way to hook our functionality (unmount if mounted in pre-deploy and mount in post-deploy) into Hostmanager (/opt/hostmanager/srv/lib/elasticbeanstalk/hostmanager/applications/phpapplication.rb) but the scripts defined in the file (i.e. /tmp/php_post_deploy_app.sh) don't seem to be working. That might be because our Ruby skills are non-existent. Question #2 is that did you manage to hook your functionality in Hostmanager in a portable way (i.e. by not changing the core Hostmanager files)?

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• Multiple static WAN IP addresses to single LAN subnet

  - by Jessy Houle

  Below is my home network topology. I currently have 5 static IP addresses, 3 of which are in use by 3 routers. These routers in-turn subnet internal networks and port forward. I use my SSL VPN appliance to remote home from work or on the road. At this point I can remotely administer my Windows Server. I know the network is setup wrong, I was matching existing hardware the best I knew how. http://storage.jessyhoule.com.s3.amazonaws.com/network_topology.jpg Ok this said, here is the problem... One of my websites on my Windows Server now needs to be secure (SSL using port 443). However, I'm already port forwarding port 443 to my VPN appliance. Furthermore, if I'm going to have to reconfigure the network, I would really like to be able to use the SSL VPN to remotely administer all machines. I mentioned this to a friend of mine, who said that what I was looking for was a firewall. Explaining that a firewall would take in multiple static (WAN) IP addresses, and still allow all internal devices to be on the same network. So, basically, I could supply my SSL VPN appliance it's very own static (WAN) IP address routing, and yet have it on the same internal network (192.168.1.x) as all my other devices. The first question is... Does this sound right? Secondly, would you suggest anything different? And, finally, what is the cheapest way to do this? I am started down the road of downloading/installing untangle and smoothwall to see if they will do the job, hoping they take multiple static (WAN) IP addresses. Thank you in advance for your answers. -Jessy Houle

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• Insufficient channel capacity of 1GBit

  - by Roman S

  There is a Caching Server (Varnish): it receives data from Amazon S3 on request, saves it for some time and gives it to the client. We have encountered the problem of insufficient channel capacity of 1GBit. Peak load within 4 hours completely chokes the channel. Server performance is sufficient for now. Approximately 4.5TB of data are transmitted per day. More than 100TB are accumulated per month. The first thought that comes to mind is simply to add one more 1GBit port and sleep peacefully until 2GBit are not enough (it may happen quite quickly) or one server is not able to handle it. And then we just need to add new Caching Servers. But now we need a Load Balancer, which will send requests on one and the same URL, always on one and the same server (to avoid multiple copies of the same cached objects). Here are the questions: Does a Balancer need a band equal to sum of all bands of Caching Servers? What shall we do in case there are no ports in a Balancer? Should we add more Balancers or solve the problem by means of Round robin DNS? What are the standard approaches to such problems? Can anyone advise hosting-companies, which can solve this problem? We are interested in American and European markets.

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• Windows 7 hangs after going into sleep a second time

  - by Brian Stephenson

  I've searched everywhere around Google and can't figure out why this is happening so I decide to ask here to see if anyone has a problem like this. Like it says in the title, whenever I sleep ONCE I'm able to wake the system, but going back to sleep again AFTER waking up for the first time results in it hanging on no input and no output, with the fan spinning as fast as possible and alot of heat being spewed out by the fan as well. I've tried various things like setting all USB Hub Root's to not get switched off for power saving, disabling USB selective suspend, disabling PCI-e link state power management, and even unplugging ALL USB devices and it wont wake up after the second attempt. And I've even waited up to a full hour of the CPU fan spinning loudly and it's still stuck trying to wake up. The only USB devices I use are a Microsoft USB Comfort Curve Keyboard 2000 (IntelliType Pro) and a generic HID compliant mouse from Creative model number OMC90S "CREATIVE MOUSE OPTICAL LITE". My other devices like external drives and controllers are unplugged when I'm not using them as having too many USB devices plugged in at a time causes a deadlock on almost all of the ports I have. Here's my system specifications (Most of these are from CPU-Z): Brand: Gateway DX4300-19 Mainboard: Gateway RS780 Chipset: AMD 780G Rev 00 Southbridge: AMD SB700 Rev 00 LPCIO: ITE IT8718 BIOS: American Megatrends Inc. ver P01-A4 09/15/2009 CPU: AMD Phenom II X4 810 at 2.60 GHz RAM: 8.0 GB DDR2 Dual Channel Ganged Mode at 400 MHz GPU: ATI Radeon HD3200 Graphics Intergrated - RS780 OS: Windows 7 Home Premium x64 OEM (Acer Group) HDD: WDC WD10EADS-22M2B0 1.0 TB (Western Digital Green Caviar) My BIOS has absolutely no control over how I setup the sleep mode to be either S1 or S3. So I can't check these settings or even change them. Hybrid sleep is also disabled, I can successfully go into hibernation and wake from hibernation but this is painfully slow due to a harddrive problem I'm having with this "Green Drive". (Hibernation takes over ~3 minutes to complete) Any help would be appreciated, thanks.

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• Wake-on-lan only works so many times

  - by Chance

  I have Wake-on-lan configured on my Windows XP machine so that the computer will wake up from Standby. Waking the computer from Standby via network traffic seems to work a certain number of times, say 4 or 5, then it stops working. If I restart the computer it seems to reset this behavior so that I can use WOL a few more times before it starts working. I use the command "wol" on my other, Linux machine with the appropriate IP address and MAC address of the card. I looked at the network card to see if it had different lights when WOL worked and when it didn't. When it has a solid amber light where the ethernet cable connects, WOL seems to work. When it has a flashing amber light, WOL does not. It seems that the system seems to almost "shut off" the card when it falls to sleep, but I don't know if this is a function of time or number of standby/wakeups. I have a 3Com 3c920 network card. If I look at the properties in Device Manager, I have "Allow this Device to bring the Computer out of Standby" checked. In the Advanced tab I have anything related to RWU (Remote Wake Up) enabled. I also believe I have the appropriate settings in BIOS related to Remote Wake-Up and I have tried both S1 and S3 power configurations in the BIOS. Intuitively, I would think I would uncheck "Allow the Computer to turn off this device to save power", but doing so disables the "Allow this Device to bring the Computer out of Standby" option. Does anyone know what is happening here or if there is a way to fix it? I have an integrated network card; would getting one that goes into a slot be better? I am running Windows XP on a Dell Optiplex GX240 with a 3Com 3c920 network card.

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• Managing persistent data on an Amazon EC2 web server

  - by Derek

  I've just started trying out Amazon's EC2 service for running an asp.net web app which uses a SQL Server 2005 Express database. I have some questions about how to configure and operate it best for reliability, and I'm hoping to tap into some collective wisdom here as this is my first foray into EC2. Here's how I have it configured currently: OS: Windows 2003 SQL Server Express 2005 Web content stored on an EBS Volume (E Drive) Database Data stored on an EBS Volume (E Drive) Database backups to "C Drive" and then copied off to S3. Elastic IP Address attached to the production instance. Now when I make a change to the OS configuration, I make a new AMI using the bundle feature. Unfortunately, I found that this results in significant downtime. While the bundle is created and the new instance is started. It seems that when I'm ready to make a new AMI, I should: Start up a new temporary instance. Detach the EBS volume from the production instance. Detach the IP Address from the production instance. Attach the IP Address to the temporary instance. Attach the EBS volume to the temporary instance. Create an AMI from the production instance. After the production instance restarts, reverse the attach/detach steps to put it back in production. Is this the right order of events to prevent any chance to corrupt the EBS volume? Will the EBS volume become corrupt if I detach it while a database Write is taking place? Should I snapshot the EBS volume of the production instance and attach it to the temporary instance instead? Or could taking a snapshot of the EBS volume while it's in use cause corruption? Any suggestions to improve the reliability and operations?

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