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  • SQL 2008 Replication over Internet

    - by Akash Kava
    We have decided to put our servers in data centers on east and west coast of US, to keep high level redundancy. After evaluating number of replication options, apart from VPN there is no other way to do replication for SQL Server. We are investigating VPN but I have following questions. Our Large DB consists of media information (pictures/movies/audio/pdf) etc, so we are not very concerned about security because they are not financial sensitive data. SQL 2005 supports or can be configured to support replication over internet? If Yes then should we downgrade to 2005? If SQL 2008 Publisher is configured for Web Sync, can we write an automatic program (C# Windows Service) to act as pull subscriber and run on the subscriber server and replicate subscriber database? Or are there any API available in SQL where we can write our own program to do replication in very generic way? (In a nut shell, can we write our own C# Windows Service based Subscriber program?)

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  • Apache virtual host for drupal test site

    - by bsreekanth
    Hello, I am a programmer, trying to launch my first website.. through different helpful posts in sf and others, I setup an account with Linode and set up a slice (Debian, Apache, ..etc). I have a Drupal site under development, and like to have a test site in the Linode server as well. Now, I like to have a site setup with the following requirement. What is the best way to setup and protect the test site along with the actual (production) site?. Is virtual host is the answer? To protect the test site, is .htaccess authentication sufficient to prevent access from public and robots? I also modifying the theme, database contents etc, so having two sites under one drupal installation may not be good idea . what do u suggest? thanks in advance. bsreekanth.

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  • Cannot connect to xdebug over virtual network - Vagrant Virtualbox

    - by smix96
    I'm trying to set up a development box using Virtualbox / Vagrant / Puppet with the intention of eventually provisioning all my machines up to production. However this is stopping me going forward at the moment. I've installed ubuntu lucid over windows 7. When trying to connect to xdebug by starting a debugging session in eclipse, it hangs at 57% (common in eclipse when it cannot communicate with xdebug). Here is my xdebug.ini and the settings here are appearing in phpinfo(). xdebug.remote_enable=On xdebug.remote_handler=dbgp xdebug.remote_host=192.168.56.1 xdebug.remote_port=9000 I'm now wondering if it's an issue with port forwarding? If eclipse is looking on port 9000, will it find port 9000 on a virtual machine? Any help would be greatly appreciated!

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  • Oracle Expert Live Virtual Seminars - Learn the tricks that only the expert know

    - by rituchhibber
    Oracle University Expert Seminars are exclusive events delivered by top Oracle experts with years of experience in working with Oracle products.         Introduction into ADF & BPM with Markus Grünewald - 11-12 December 2012 ADF/WebCenter 11g Development in Depth with Andrejus Baranovskis - 13-14 December 2012 Beating the Optimizer with Jonathan Lewis - Online - 17 January 2013 RAC Performance Tuning On-Line with Arup Nanda - 25 January 2013 Mastering Oracle Parallel Execution with Randolf Geist - 30 January 2013 Minimize Downtime with Rolling Upgrade using Data Guard with Uwe Hesse - 8 February 2013 For a full list of Oracle Expert Seminars near you or on line click here. Remember that your OPN discount is applied to the standard prices shown on the website.For more information, assistance in booking and to request new dates, contact your local Oracle University Service Desk.

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  • Virtual machine won't connect to networking interface

    - by Keyo
    I have moved my virtual box hard drive (.vdi file) from windows7 on a laptop, to windows7 on a desktop. No big deal I thought. The OS is ubuntu 10.10. Now networking is broken. I don't have a solid understanding of windows networking, maybe someone can help. Anyway, the networking no longer works. I've tried to setup eth0. I have virtualbox setup in bridge mode, my wifi connection on windows to an intel card on the virtualbox side. I think it might be something to do with windows not allowing the connection to bridge properly (security issues). I've provided some screenshots, which will hopefully help.

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  • Apache2 alias in virtual host

    - by 0x7c00
    I have multiple virtual host in one server and plan to has some alias setup in one virtualhost. So I add the Alias /foo/ /path/to/foo/ in virtualhost directive,but it has no effect. request of host1/foo/ will return 404. But if I add this to /etc/apache2/mods-available/alias.conf, it works. But the problem is host2 will also share this alias. Is there a way to make the alias work only for host1? B.T.W, I use apache2ctl -l, there's no mod_alias.c listed, weird.

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  • Unable to sync time using `ntpdate`, error: "no server suitable for synchronization found"

    - by William Ting
    My ntp.conf file: user@pc[0][07:37:40]:/etc$ cat /etc/ntp.conf idriftfile /var/lib/ntp/ntp.drift server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org server pool.ntp.org Command output: user@pc[0][07:37:24]:/etc$ sudo ntpdate -dv pool.ntp.org 18 Jun 07:37:35 ntpdate[10737]: ntpdate [email protected] Tue Apr 19 07:15:05 UTC 2011 (1) Looking for host pool.ntp.org and service ntp host found : conquest.kjsl.com transmit(198.137.202.16) transmit(216.45.57.38) transmit(64.6.144.6) transmit(198.137.202.16) transmit(216.45.57.38) transmit(64.6.144.6) transmit(198.137.202.16) transmit(216.45.57.38) transmit(64.6.144.6) transmit(198.137.202.16) transmit(216.45.57.38) transmit(64.6.144.6) transmit(198.137.202.16) transmit(216.45.57.38) transmit(64.6.144.6) 198.137.202.16: Server dropped: no data 216.45.57.38: Server dropped: no data 64.6.144.6: Server dropped: no data server 198.137.202.16, port 123 stratum 0, precision 0, leap 00, trust 000 refid [198.137.202.16], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 transmit timestamp: d1a71a93.1f16c1e3 Sat, Jun 18 2011 7:37:39.121 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 server 216.45.57.38, port 123 stratum 0, precision 0, leap 00, trust 000 refid [216.45.57.38], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 transmit timestamp: d1a71a93.524a05dd Sat, Jun 18 2011 7:37:39.321 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 server 64.6.144.6, port 123 stratum 0, precision 0, leap 00, trust 000 refid [64.6.144.6], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 transmit timestamp: d1a71a93.524a05dd Sat, Jun 18 2011 7:37:39.321 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 server 64.6.144.6, port 123 stratum 0, precision 0, leap 00, trust 000 refid [64.6.144.6], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000 transmit timestamp: d1a71a93.857c6fbd Sat, Jun 18 2011 7:37:39.521 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 18 Jun 07:37:40 ntpdate[10737]: no server suitable for synchronization found

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  • Installing Java on a Virtual Private Server

    - by Martin Rowe
    I have recently managed to get my employer to pay for a vps. I teach and asked the vps provider to enable Perl, Python, Ruby, Tomcat and Java. They've done the first four (really quickly) but have got back to me asking which parts of Java I need. I think the Java Virtual Machine is a given but what other S/W do I need to get installed? I think by getting the vps I now have the chance to teach Enterprise Java and want to get into Java Message Server and Enterprise patterns. Can I get Glassfish installed or is that a silly question? What about servlets and beans? Thanks in anticipation Martin Rowe

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  • Availability Best Practices on Oracle VM Server for SPARC

    - by jsavit
    This is the first of a series of blog posts on configuring Oracle VM Server for SPARC (also called Logical Domains) for availability. This series will show how to how to plan for availability, improve serviceability, avoid single points of failure, and provide resiliency against hardware and software failures. Availability is a broad topic that has filled entire books, so these posts will focus on aspects specifically related to Oracle VM Server for SPARC. The goal is to improve Reliability, Availability and Serviceability (RAS): An article defining RAS can be found here. Oracle VM Server for SPARC Principles for Availability Let's state some guiding principles for availability that apply to Oracle VM Server for SPARC: Avoid Single Points Of Failure (SPOFs). Systems should be configured so a component failure does not result in a loss of application service. The general method to avoid SPOFs is to provide redundancy so service can continue without interruption if a component fails. For a critical application there may be multiple levels of redundancy so multiple failures can be tolerated. Oracle VM Server for SPARC makes it possible to configure systems that avoid SPOFs. Configure for availability at a level of resource and effort consistent with business needs. Effort and resource should be consistent with business requirements. Production has different availability requirements than test/development, so it's worth expending resources to provide higher availability. Even within the category of production there may be different levels of criticality, outage tolerances, recovery and repair time requirements. Keep in mind that a simple design may be more understandable and effective than a complex design that attempts to "do everything". Design for availability at the appropriate tier or level of the platform stack. Availability can be provided in the application, in the database, or in the virtualization, hardware and network layers they depend on - or using a combination of all of them. It may not be necessary to engineer resilient virtualization for stateless web applications applications where availability is provided by a network load balancer, or for enterprise applications like Oracle Real Application Clusters (RAC) and WebLogic that provide their own resiliency. It's (often) the same architecture whether virtual or not: For example, providing resiliency against a lost device path or failing disk media is done for the same reasons and may use the same design whether in a domain or not. It's (often) the same technique whether using domains or not: Many configuration steps are the same. For example, configuring IPMP or creating a redundant ZFS pool is pretty much the same within the guest whether you're in a guest domain or not. There are configuration steps and choices for provisioning the guest with the virtual network and disk devices, which we will discuss. Sometimes it is different using domains: There are new resources to configure. Most notable is the use of alternate service domains, which provides resiliency in case of a domain failure, and also permits improved serviceability via "rolling upgrades". This is an important differentiator between Oracle VM Server for SPARC and traditional virtual machine environments where all virtual I/O is provided by a monolithic infrastructure that itself is a SPOF. Alternate service domains are widely used to provide resiliency in production logical domains environments. Some things are done via logical domains commands, and some are done in the guest: For example, with Oracle VM Server for SPARC we provide multiple network connections to the guest, and then configure network resiliency in the guest via IP Multi Pathing (IPMP) - essentially the same as for non-virtual systems. On the other hand, we configure virtual disk availability in the virtualization layer, and the guest sees an already-resilient disk without being aware of the details. These blogs will discuss configuration details like this. Live migration is not "high availability" in the sense of "continuous availability": If the server is down, then you don't live migrate from it! (A cluster or VM restart elsewhere would be used). However, live migration can be part of the RAS (Reliability, Availability, Serviceability) picture by improving Serviceability - you can move running domains off of a box before planned service or maintenance. The blog Best Practices - Live Migration on Oracle VM Server for SPARC discusses this. Topics Here are some of the topics that will be covered: Network availability using IP Multipathing and aggregates Disk path availability using virtual disks defined with multipath groups ("mpgroup") Disk media resiliency configuring for redundant disks that can tolerate media loss Multiple service domains - this is probably the most significant item and the one most specific to Oracle VM Server for SPARC. It is very widely deployed in production environments as the means to provide network and disk availability, but it can be confusing. Subsequent articles will describe why and how to configure multiple service domains. Note, for the sake of precision: an I/O domain is any domain that has a physical I/O resource (such as a PCIe bus root complex). A service domain is a domain providing virtual device services to other domains; it is almost always an I/O domain too (so it can have something to serve). Resources Here are some important links; we'll be drawing on their content in the next several articles: Oracle VM Server for SPARC Documentation Maximizing Application Reliability and Availability with SPARC T5 Servers whitepaper by Gary Combs Maximizing Application Reliability and Availability with the SPARC M5-32 Server whitepaper by Gary Combs Summary Oracle VM Server for SPARC offers features that can be used to provide highly-available environments. This and the following blog entries will describe how to plan and deploy them.

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  • Best Practices for "temporary" accounts in a Windows server environment?

    - by Millman
    Are there any best practices for "temporary worker" accounts in a Windows server environment? We have a couple of contractors joining the organization temporarily. They only need access to a few folders. Aside from joining them to the "Domain Guests" group and granting them access only to the folders specified. Are there any other issues to be aware of? We are in a Windows Server 2003 domain environment.

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  • "Catch-All" access log with Apache Virtual Hosts?

    - by pix0r
    I have many virtual hosts set up on a web server, each one having its own error and access log. The relevant lines of httpd.conf are something like this: ErrorLog /var/log/httpd-error.log LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined CustomLog /var/log/httpd-access.log combined NameVirtualHost *:80 <VirtualHost *:80> ServerName myhost.com ServerAlias www.myhost.com DocumentRoot /var/www/myhost.com/htdocs ErrorLog /var/www/myhost.com/log/error.log CustomLog /var/www/myhost.com/log/access.log combined </VirtualHost> # ... many more VirtualHosts Currently, I'm getting some random errors in /var/log/httpd-error.log, but I'm getting nothing in /var/log/httpd-access.log. Is it possible to have ALL accesses and errors duplicated to a shared logfile? Is it possible to do this without adding new entries to every single VirtualHost?

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  • Virtual DNS recommended setup...

    - by luison
    Hi. We are new to virtualization which we are setting up with Proxmox VE (OpenVZ + KVM). I am a bit lost about the recommended DNS forwarder config specially in the OpenVZ (Virtuosso type) of enviroiment. Our intention was to have a small dnsmasq running in one of the VM acting as backup DHCP server and serving our in-office local addresses (and PCs) by an additional resolve.conf file which dnsmasq supports, but I've read that all VM should share DNS pointing to the host machine in which case it would make more sense having it there. My problem is that I would like to have as least as possible apps in the host so a reinstall of the environment (porxmox ve) and a machine restore can be as quick as possible. Does anyone have a similar setup? Does it make sense to have the 1st virtual machine running the local dns forwarder? Also... dnsmasq seems to want to have root permissions when running on an OpenVZ container... are there any work arrounds anyone knows for that.

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  • Ubuntu Dual Screen Using Virtual Machine - AMD GPU

    - by Chris
    I've been searching online and reading tutorials and etc about how to make my ubuntu VM dual screen(x86_64). I have first tried to run these commands: sudo aticonfig --initial -f which gave me the ouput of: sudo: aitconfig: command not found I then googled the output and followed these instructions that I tells me to install my ATI drivers onto my ubuntu. wget http://www2.ati.com/drivers/linux/ati-driver-installer-11-5-x86.x86_64.run sudo sh ati-driver-installer-11-5-x86.x86_64.run --buildpkg Ubuntu/natty sudo dpkg -i *.deb sudo apt-get -f install sudo aticonfig -f --initial --adapter=all sudo reboot It all works well until I input sudo apt-get -f install which gives me the following output: sudo apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 25 not upgraded. 3 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Setting up fglrx (2:8.850-0ubuntu1) ... update-alternatives: error: alternative link /usr/bin/aticonfig is already managed by x86_64-linux-gnu_gl_conf. dpkg: error processing fglrx (--configure): subprocess installed post-installation script returned error exit status 2 dpkg: dependency problems prevent configuration of fglrx-amdcccle: fglrx-amdcccle depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-amdcccle (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of fglrx-dev: fglrx-dev depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-dev (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: fglrx fglrx-amdcccle fglrx-dev E: Sub-process /usr/bin/dpkg returned an error code (1) At this point, I don't know what to do since running: gksudo amdcccle For the record, I have 3D acceleration turned on. The following is my GPU for my VM lspci | grep VGA 00:02.0 VGA compatible controller: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter Any Help on how I can make my VM dual screen with Ubuntu would be great. Thank you in advance.

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  • How can I keep track of SQL Server cummulative updates?

    - by Adrian Grigore
    Hi, If I am not mistaken, SQL server cannot be automatically updated via the regular windows backup routine. Instead, there are cummulative updates that need to be installed by hand. I assume this is done for security and stability reasons. Is this correct? If so, how can I keep track of new updates without regularly reading SQL server related blogs? Is there any low-volume newsletter I can subscribe (ideally only announcing critical updates)?

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  • Convert KVM virtual machine to LXC container

    - by linkdd
    I have 2 virtual machines (with Debian, using KVM) with virtual hard drives: /srv/kvm/ssh.img /srv/kvm/www.img Both have 3 partitions (/, /home, swap). I want to convert them in a RootFS usable with LXC (in order to use LXC instead of KVM). The only solution I have for the moment is: create a new RootFS copy /home partition into it reproduce the same configuration into it But is there an automated way to do it

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  • Default virtual server does not work

    - by Luc
    Hello, I have 4 Name Virtual Hosts on my apache configuration, each one using proxy_http to forward request to the correct server. They work fine. <VirtualHost *:80> ServerName application_name.domain.tld ProxyRequests Off ProxyPreserveHost On ProxyPass / http://server_ip/ ProxyPassReverse / http://server_ip/ </VirtualHost> I then tried to add a default NameVirtualHost to take care of the requests for which the server name does not match one of the four others. Otherwise a request like some_weird_styff.domain.tld would be forwarded to one of the 4 VH. I then added this one: <VirtualHost *:80> ServerAlias "*" DocumentRoot /var/www/ </VirtualHost> At the beginning it seemed to work fine, but at some point it appears that the requests that should be handed by one of the 4 regular hosts is "eaten" by the default one !!! If I a2dissite this default host, everything is back to normal... I do not really understand this. If you have any clue... thanks a lot, Luc

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  • Mount exFAT partition in virtual guest machine

    - by Alain Jacomet
    I have a real Ubuntu 12.10 installation being virtualized under a Windows 8 host, by using the VBoxManage.exe internalcommands createrawvmdk method. I'm trying to mount an exFAT partition into the virtualized machine (which is the partition of shared work files), but even though I have fuse-exfat installed, and the partition is perfectly mountable while booting entirely into Ubuntu, I can't mount it while virtualizing it. 1- If I make a full vmdk image of the HDD, including all partitions, Ubuntu 12.10 "sees" the partition, and trying to mount it throws this error: Image: http://i.stack.imgur.com/AyUSn.png 2- If I make a machine with only the linux partitions, + the exFAT partition. Again Ubuntu "sees" the partition and the result is: Error: fsync failed Image: http://i.stack.imgur.com/u4SkC.png 3- If I make a machine with only the linux partitions, and try to mount it, Ubuntu doesn't "see" the partition, and I get this error: Image: i.stack.imgur.com/q1hz5.png I've tried using the VirtualBox' "Shared Folders" functionality but even though I install the "Guest Additions", the system doesn't seem to recognize the shared folder: Image: i.stack.imgur.com/yLU0E.png Help? Thanks!

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  • Strategy for clients to retrieve real-time log from HTTP server

    - by Jerry Dodge
    I have an HTTP Server Service application which has its own logging mechanism. It's written in Delphi. I would like to provide a way for multiple clients to connect to this service and get a real-time update of the log. The log in the service moves rather fast, there's a lot of things to log. There may be up to 50 messages within 1 second at times. The existing log which is already implemented is not saved, it's only kept in the memory of the server service - where I will need to distribute it to any client which needs it. Once all clients have a log message, it should be deleted. I intend to use HTTP to "ask" the server for the log, and respond with an XML packet. The connections are not keep-alive. The only problem is, the server should only send the client those log records which it needs, not everything. I have no way of the server pushing the log to the clients in real-time, so each client needs to repeatedly ask the server for the latest log records. This HTTP Server is very lightweight, and there is no session management. There isn't even any type of authentication. The only way I see is for a client to register its self on the server, and whenever a log is issued on the server, it creates a copy of the log for each client, where each client has a log queue (string list). However, suppose there are 100 clients connected and expecting to receive this log. That means the server must create 100 copies of each log, add this log to the end of each client log queue, and wait for the client to request it. At that point, when the server replies with the XML log, it should flush (delete) whatever's in the queue. I'm worried however that this could cause memory issues. Each client log queue might get 100 log messages before the client requests the latest logs. How should I go about doing this in the fastest way possible without hindering the performance of the server? I'm trying to avoid having to create a copy of each log for each client.

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  • Backup virtual machine

    - by Lucas
    I use VMWare Fusion on Mac OSX and backup my system with Time Machine. Now I read, that this will not backup my virtual machine with usable results. What are my possibilities to back up my virtual machine?

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