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• Mail Stuck in Backend Exchange Queue

  - by Kyle Brandt

  I have a message that has and is stuck in a queue on my backend mail server. The queue is: Internet Mail SMTP Connector (MY_FRONT_END_SERVER_NAME)-524350ff... It is in state retry with 183 failures. It is only one message and all other mail is flowing. The message is not particularly large. My limited understanding, a guess really, is that this message should get handed off to the front end mail server and sent to the remote hosts for which it is destined, so it should even matter if the remote host is up. However, I can telnet to the smtp provider of that host. How can I find out why it is stuck in this queue, and can I force it out somehow (unfreeze doesn't help me)?

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• 3 Headed Display Ubuntu Wallpaper

  - by Kyle Brandt

  I got 3 display working in Linux. I have set it up so I have Xinerama and 3 different X sessions. So my 3 displays are not all the same size, two are 1680x1050 and then the other which is between the two is 2560x1600. So my issue is when I chose span, even if the image is larger than all 3 resolutions combined, the center monitor has bars at the top and the bottom because span scales the image it seems. Is there a way if I bypass the gui to have an image span all three monitors but with no scaling? Urgent! Please help! ;-)

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• Mouse won't work in XP on Latitude

  - by Kyle Brandt

  I have a Latitude D630 Laptop with a Fresh Windows XP install that won't work with a generic external USB mouse. It recognizes the device has been put in but fails to install it. USB keyboards work fine I have tried restarting the laptop Tried starting the machine without the docking station and plugging directly into the laptop Don't have the original CD, but I installed drives from the Dell website until there were no ? icons Tried deleting the USB mouse device and plugging it again

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• Single email Stuck in Backend Exchange Queue

  - by Kyle Brandt

  I have an outgoing message that has and is stuck in a queue on my backend mail server. The queue is: Internet Mail SMTP Connector (MY_FRONT_END_SERVER_NAME)-524350ff... It is in state retry with 183 failures. It is only one message and all other mail is flowing. The message is not particularly large. My limited understanding, a guess really, is that this message should get handed off to the front end mail server and sent to the remote hosts for which it is destined, so it should even matter if the remote host is up. However, I can telnet to the smtp provider of that host. How can I find out why it is stuck in this queue, and can I force it out somehow (unfreeze doesn't help me)?

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• What is the fall off of subsecond throughput on Ethernet Network Interfaces

  - by Kyle Brandt

  On a network interface, speeds are given in term of data over time, in particular, they are bits per second. However, in the uber-fast world of computing -- a second is kind of a really long time. So for example, given a linear falloff. A 1 GBit per second interface would do 500MBit per half second, 250Mbit per quarter second etc. I imagine at certain units of time, this is no longer linear. Perhaps this is set by ethernet frequencies, system clock speeds, interrupt timers etc. I am sure this varies depending on the system -- but does anyone have more information or whitepapers on this? One of the main reasons I am curious is to understand output drops on interfaces. Even if the speed per second is much lower than the interface can handle -- perhaps there are spikes that cause drops for only small numbers of milliseconds. Perhaps various coalescing would hide this effect -- or perhaps increase it on the receiving interface? Do queues make a difference here? Example: So given if this is linear down to the MS we would have 1Mbit/MS, and if Wireshark isn't distorting what I see, should I see drops when I have a spike beyond 1Mbit?

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• Is there a feature in Nagios that allows Memory between checks?

  - by Kyle Brandt

  There are various instances where there are values I want to monitor with Nagios, and I don't care as much about the value itself, but rather how it compares to the previous value. For instance, I wrote one to check the fail counters in OpenVZ. In this case, I didn't care about the value that much, but rather I cared if the value increased. Another example might be switch ports, I would be most interested to get alerted about the change of state of a port (Although perhaps a trap would be better for this one). For my OpenVZ script, I used a temp file, but I am wondering if there is a better way? Maybe Nagios has some variables that plugins (check scripts) can access that are persistent across checks?

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• Should the MAC Tables on a switch Stack be the same between sessions?

  - by Kyle Brandt

  According to Cisco's documentation: "The MAC address tables on all stack members are synchronized. At any given time, each stack member has the same copy of the address tables for each VLAN." However, when logged into the switch I see the following: ny-swstack01#show mac ad | inc Total Total Mac Addresses for this criterion: 222 ny-swstack01#ses 2 ny-swstack01-2#show mac ad | inc Total Total Mac Addresses for this criterion: 229 ny-swstack01-2#exit ny-swstack01#ses 3 ny-swstack01-3#show mac ad | inc Total Total Mac Addresses for this criterion: 229 ny-swstack01-3#exit ny-swstack01#ses 4 ny-swstack01-4#show mac ad | inc Total Total Mac Addresses for this criterion: 235 ny-swstack01-4#exit ny-swstack01#show mac ad | inc Total Total Mac Addresses for this criterion: 222 Going back and forth this isn't just because it is changing over time either, within certain sessions there are entries that I don't seen from the master session. We are currently waiting to hear back on CIsco from this, but has anyone run into this before? I stumbled upon this when looking into Unicast flooding, one of the hosts that is a destination MAC of flooding has a MAC entry that appears in session 3, but nowhere else. Also, I checked an all sessions show the same aging time.

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• Basic Weight Questions with HAProxy

  - by Kyle Brandt

  Do weights assigned to servers only effect the balance within that particular backend? When implementing weights for the first time, if I give all the servers in a backend the same number, would that be the same as before when there we no weights? How do I calculate just how much traffic I am shiffting by adjust weights by certain amounts. For example: server web1 10.10.10.10 weight 100 server web2 10.10.10.11 weight 100 server web3 10.10.10.12 weight 90 server web4 10.10.10.13 weight 90

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• TCP Sessions and IP Changes

  - by Kyle Brandt

  What happens to a TCP session when the IP of a client changes? I did a simple test of having netcat listen on a port, and connecting to that port from a client machine. I then changed the IP of the client while that nc session was open and sent some data, no data was received by server after changing the IP. I know they are different layers, but does TCP use IPs for part of how it distinguishes sessions? Does my example not work because of how the application handles it, or is this not working because of something happening at TCP/IP/Ethernet layers? Does this depend on the OS implementation? ( I am most interested in Linux at the moment)

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• Everything You Ever Wanted to Know about Mod_Rewrite Rules but Were Afraid to Ask?

  - by Kyle Brandt

  How can I become an expert at writing mod_rewrite rules? What is the fundamental format and structure of mod_rewrite rules? What form/flavor of regular expressions do I need to have a solid grasp of? What are the most common mistakes/pitfalls when writing rewrite rules? What is a good method for testing and verifying mod_rewrite rules? Are there SEO or performance implications of mod_rewrite rules I should be aware of? Are there common situations where mod_rewrite might seem like the right tool for the job but isn't? What are some common examples?

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• Network location is not on the Domain

  - by Kyle Brandt

  I have a computer joined to the domain, but it doesn't view the network "location" as being part of the domain. I have tried removing and rejoining the domain and this doesn't help: Other computers in the same network don't have this problem. I have also tried several different icons, including both the train and the airplane which doesn't seem to make a difference. At least using nslookup, the server seems to have connectivity with the DCs in the same site. There also seem to be some errors that suggest a NULL domain: Computer: OR-WEB05.ds.stackexchange.com Description: NtpClient was unable to set a domain peer to use as a time source because of failure in establishing a trust relationship between this computer and the '' domain in order to securely synchronize time. NtpClient will try again in 3473457 minutes and double the reattempt interval thereafter. The error was: The trust relationship between this workstation and the primary domain failed. (0x800706FD)

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• Oracle 11g Express Edition

  - by Kyle Brandt

  I have been tasked with installing the latest oracle XE edition. The versions I have installed recently are all 11g, but when I look for the XE edition I only see 10g. Is 10g the latest XE edition or Oracle? If that is the case, does anyone know why is there not an 11g express edition?

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• Everything You Ever Wanted to Know about Mod_Rewrite Rules but Were Afraid to Ask?

  - by Kyle Brandt

  How can I become an expert at writing mod_rewrite rules? What is the fundamental format and structure of mod_rewrite rules? What form/flavor of regular expressions do I need to have a solid grasp of? What are the most common mistakes/pitfalls when writing rewrite rules? What is a good method for testing and verifying mod_rewrite rules? Are there SEO or performance implications of mod_rewrite rules I should be aware of? Are there common situations where mod_rewrite might seem like the right tool for the job but isn't? What are some common examples?

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• Monitoring Active Directory (AD) Replication in Windows Server 2008 R2

  - by Kyle Brandt

  With Active Directory, what is a good way to monitor replication? I have multiple sites and multiple locations, so ideally both replication between sites and within sites would be monitored. I'm not really sure if each DC needs to be monitored, each NTDS connection, or each DC * Each NTDS connection. For the purposes of fitting into a standard alerting methodology, perfmon counters that would allow me to alert if replication was behind X minutes seems like it might be ideal.

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• What's going on with INETA and the Regional Speakers Bureau?

  - by Chris Williams

  For those of you that have been waiting patiently (and not so patiently) I'm happy to say that we're very near completion on some changes/enhancements/improvements that will allow us to finally go live with the INETA Regional Speakers Bureau. I know quite a few of you have already registered, which is great (though some of you may need to come back and update your info) and we've had a few folks submit requests, mostly in a test capacity, but soon we'll be up and live. Here's how it breaks down. Be sure to read this, because things have changed a bit from when we initially announced it. 1. The majority of our speaker/event funding is going into the Regional Speakers Bureau.  The National Bureau still exists, but it's a good bit smaller than it was before, and it's not an "every group" benefit anymore. We'll be using the National Bureau as more of a strategic task force, targeting high impact events and areas that need some community building love from INETA. These will be identified and handled on a case by case basis, and may include more than just user group events. 2. You're going to get more events per group, per year than you did before. Not only are we focusing more resources on this program, but we're also making a lot of efforts to use it more effectively. With the INETA Regional Speakers Bureau, you should be able to get 2-3 INETA speakers per year, on average. Not every geographical area will have exactly the same experience, but we're doing the best we can. 3. It's not a farm team program for the National Bureau. Unsurprisingly, I managed to offend a number of people when I previously made the comment that the Regional Speakers Bureau program was a farm team or stepping stone to the National Bureau. It was a poor choice of words.  Anyone can participate in the Regional Speakers Bureau, and I look forward to working with all of you. 4. There is assistance for your efforts. The exact final details are still being hammered out, but expect it to look something like this: (all distances listed are based on a round trip) Distances < 120 miles = $0 121 miles - 240 miles = $50 (effectively 1 to 2 hours, each way) 241 miles - 360 miles = $100 (effectively 2 to 3 hours, each way) 361 miles - 480 miles = $200 (effectively 3 to 4 hours, each way) For those of you who travel a lot, we're working on a solution to handle group visits when you're away from home. These will (for now) be handled on a case by case basis. 5. We're going to make it as easy as possible to work with the program. In order to do this, we need a few things from you. For speakers, that means your home address. It also means (maybe) filling out a simple 1 line expense report via the INETA website. For user groups, it means making sure your meeting address is up to date as well. 6. Distances will be automatically calculated from your home of record to the user group event and back. We realize that this is not a perfect solution to every instance, but we're not paying you to speak at an event, and you won't be taxed on this money. It's simply some assistance to make your community efforts easier. Our way of saying thanks for everything you do. 7. Sounds good so far, what's the catch? There's always a catch, right? In this case there are two of them: 1) At this time, Microsoft employees are welcome to use the website to line up speaking engagements with user groups, but are not eligible for financial assistance. 2) Anyone can register and use the website to line up speaking engagements with user groups, however you must receive and maintain a net score of 3+ positive ratings (we're implementing a thumbs up / thumbs down system) in order to receive financial assistance. These ratings are provided by the User Group leaders after the meeting has taken place. 8. Involvement by the User Group leaders is a key factor in the success of this program. Your job isn't done once you request a speaker. After you've had your meeting, it's critical that you go back to the website and take a very small survey. Doing this ensures that the speaker gets rated (and compensated if eligible) and also ensures that you can make another request, since you won't be able to make a new request if you have an old one outstanding. 9. What about Canada? We're definitely working on that. Unfortunately nothing new to report on that front, other than to say that we're trying. So... this is where things stand currently. We're working very quickly to get this in place and get speakers and groups together. If you have any questions, please leave a comment below and I'll answer them as quickly as possible. If I've forgotten anything, or if things change, I'll update it here. Thanks, Chris G. Williams INETA Board of Directors

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• InSync12 and Australia Visits: UX is Global, Regional, Everywhere!

  - by ultan o'broin

  I attended the Australian Oracle User Group (AUSOUG) and Quest International User Group's InSync12 event in Melbourne, Australia: the user group conference for Oracle products in the ANZ region. I demoed Oracle Fusion Applications and then presented how Oracle crafted the world class Fusion Apps user experience (UX). I explained about the Oracle user experience design pattern strategy of uptake for all apps, not just Fusion, and what our UX pattern externalization strategy means for customers, partners, and ADF developers. A great conference, lots of energy, the InSync12 highlights for me were Oracle's Senior Vice President Cliff Godwin’s fast-moving Oracle E-Business Suite (EBS) roadshow with the killer Oracle Endeca user experience uptake, and Oracle ADF product outreachmeister Chris Muir’s (@chriscmuir) session on Oracle ADF Mobile solution and his hands-on mobile app development showing how existing ADF/JDev skills can build a secure, code once-deploy-to-many-device hybrid app solution in minutes. Cliff Godwin shows off the Oracle Endeca integration with Oracle E-Business Suite. Chris Muir talked the talk and then walked the walked with Oracle ADF Mobile. Applications UX was mixing it up with the crowd at InSync12 too, showing off cool mobile UX solutions, gathering data for future innovations, and engaging with EBS, JD Edwards, and PeopleSoft apps customers and partners. User conferences such as InSync12 are an important part of our Oracle Applications UX user-centered design process, giving real apps users the opportunity to make real inputs and a way for us to watch and to listen to their needs and wants and get views on current and emerging UX too. Eric Stilan (@icondaddy) of Applications UX uses an iPad to gather feedback on the latest UX designs from conference attendees. While in Melbourne, I also visited impressive Oracle partner, Callista for a major ADF and UX pow-wow, and was the er, star of a very proactive event hosted by another partner Park Lane Information Technology (coordinated by Bambi Price (@bambiprice) of ODTUG) where I explained what UX is about, and how partner and customers can engage, participate and deploy that Applications UX scientific insight to advantage for their entire business. I also paired up with Oracle Australia in Sydney to visit key customers while there, and back at Oracle in Melbourne I spoke with sales consultants and account managers about regional opportunities and UX strategy, and came away with an understanding of what makes the Oracle market tick in Australia. Mobile worker solution development and user experience is hot news in Australia, and this was a great opportunity to team up with Chris Muir and show how the alignment of the twin stars of UX design patterns and ADF technology enables developers to make great-looking, usable apps that really sparkle. Our UX design patterns--or functional (UI) patterns, to use the developer world language--means that developers now have not only a great tool set to build apps on Oracle ADF/FMW but proven, tested usability solutions to solve common problems they can apply in the IDE too. In all, a whirlwind UX visit, packed with events and delivery opportunities, and all too short a time in the wonderful city of Melbourne. I need to get back there soon! For those who need a reminder, there's a website explaining how to get involved with, and participate in, Applications User Experience (including the Oracle Usability Advisory Board) events and programs. Thank you to AUSOUG, Quest, InSync, Callista, Park Lane IT, everyone at Oracle Australia, Chris Muir, and all the other people who came together to make this a productive visit. Stay tuned for more UX developments and engagements in the region on the Oracle VoX blog and Usable Apps website too!

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• Time Machine (OSX) doesn't back up files in Mount Point or Disk Image File

  - by Chris

  I found this Q&A (http://superuser.com/questions/148849/backup-mounted-drive-of-an-image-in-time-machine) and this prompted me to ask the following question: I have two disk images which are scripted to be mounted on login. These two disk images are always mounted to the same location. These two disk images are encrypted TrueCrypt volumes. Time Machine (TM) will only back up the disk images the first time they are mounted, but not after that. As I modify documents within the volumes throughout the day, the modified timestamps are adjusted properly. However, TM does not back them up. TM never backs up the mount points which are two folders within my home directory. Any ideas as to why neither the mount point or the image files are backed up? Do the image files have to be closed (unmounted) after being modified for TM to back them up? Thanks, Chris

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• How can I find the Windows domain logon name of a user from within Outlook 2010?

  - by Chris Farmer

  I need to figure out someone's login name for our domain, and I'd like to be able to do this from within Outlook 2010. I used to be able to do this from Outlook 2007 by right-clicking the user's name in an email message that they'd sent me, and clicking "Outlook Properties..." in the context menu. That would bring up this dialog, which contained what I need in the "alias" field: Now I've installed Outlook 2010. I want to do the same thing, but I can't seem to find a corresponding field. First, I don't see an explicit "Outlook Properties" menu option anymore, and what I think is the corresponding dialog looks completely different: It seems weird that, although I'm looking at the properties of my own name in the same email message in 2007 and 2010 in these screenshots, my name is shown differently in each -- Chris versus Christopher. That makes me think that Outlook isn't really looking in the same place to get this info in each case. So, can I get that "alias" field from within Outlook 2010?

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• UDP flooding multiple servers

  - by Chris Gurney

  What do you suggest? Being UDP flooded as I write to multiple servers in different data centers in 5 different countries . Up to 250,000 packets a second. I believe Cisco routers 5505 would not handle that - (some of our datacenter hosters can offer them. Some have no firewalls to offer.) Our clients naturally have constant disconnects to the server they are on. Hacker started this about three weeks ago. Sometimes for a few hours - up to a few days. If we can't stop it hitting the server with firewalls then how do we stop the hacker - now there is the challenge! Update : Found some of the data centers offer up to 10 firewall rules but would their routers be able to handle the possible volume I am talking about? Thanks Chris

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• HP DL160 vs DL360 for virtualization

  - by Chris

  Hi, We're planning to consolidate our infrastructure (a dozen servers). We'll buy two or three identical new servers who will be setup as a XenServer pool. Load balancing and HA tools will monitor the pool and vMotion VMs in case of failure/overload. I know that the DL100 series of HP servers is cheaper than the DL300 serie (in every sense of the word). As we don't need local storage (we have a SAN) and can live with a temporary down server (provided that Xen Server HA tools work as advertized), what are the downsides going with the DL100 serie ? Thanks, Chris

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• Why aren't connections released by the tomcat AJP connector

  - by Chris

  I have here a jboss with a web application. The tomcat is configured to use the ajp connector. Incoming connections are tunneled via an apache reverse proxy to the connector. Now I recognized that under heavy load the connector keeps a bunch of connections in "keep alive" mode for eternity and doesn't release them any more. With the normal HTTP connector the app did well, but now with the ajp connector we have regular app stallments. Can someone give me some advice where to start to look to resolve this issue? Why does the connector not release the connection again after idling for 300 secs? thanks, chris

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• Time Machine (OSX) doesn't back up files in Mount Point or Disk Image File

  - by Chris

  Hi all, I found this Q&A (http://superuser.com/questions/148849/backup-mounted-drive-of-an-image-in-time-machine) and this prompted me to ask the following question: I have two disk images which are scripted to be mounted on login. These two disk images are always mounted to the same location. These two disk images are encrypted TrueCrypt volumes. Time Machine (TM) will only back up the disk images the first time they are mounted, but not after that. As I modify documents within the volumes throughout the day, the modified timestamps are adjusted properly. However, TM does not back them up. TM never backs up the mount points which are two folders within my home directory. Any ideas as to why neither the mount point or the image files are backed up? Do the image files have to be closed (unmounted) after being modified for TM to back them up? Thanks, Chris

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• Enabling 8021q on a nic

  - by Chris Phillips

  Hi, I'm trying to get a vlan interface on a bonded nic (Centos 5.5) and whilst the interface has been very happily created with vconfig I'm seeing no traffic on it at all. Running tcpdump and tshark on the underlying eth0 I see no sign at all of vlan tags in the traffic, and I'm wondering if there's somethign I'm missing on the server side as the network dept say they are sending me the tagged data. I've got the 8021q module loaded, however under lsmod it shows it's only being used by the cxgb3 module, for an unused onboard iSCSI card, whereas my nics (on an HP DL380 G7) are driven by bnx2 and e1000e modules. Should these modules be listing 8021q as used module? should I have something conrete in /etc/modprobe.conf? Thanks Chris

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• How backward compatible are the HSDPA mobile networks

  - by Chris Kimpton

  Hi, I have got this Huawei wifi device, which has been unlocked for other networks. Works fine in UK on Vodafone (as well as 3). We are trying to get it to work with the Claro network in Jamaica. It connects and stays connected, but fails to get a 3g connection, just the slow EDGE one. Claro support say its because Claro currently does not support the 2100MHz frequency for 3G, which is what the device uses Does that sound correct? They say I need one that: Ensure however that these devices can use the 850MHz frequency. My understanding was that the device supports up to 2100, including their 850mhz... I am thinking that maybe the APN is incorrect, but I have set it to the only value I can find on the net, namely: internet.ideasclaro.com.jm Thanks in advance, Chris

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• FTP an entire folder via the command line

  - by Chris Southam

  I'm looking so migrate some websites to a new server. I have SSH access to the current one but only FTP access to the new one. How can I via Centos and SSH copy entire folders to the new server via FTP? I can log into the new server via the built in FTP client on Centos but I'm not sure of the commands after this. I need to move the httpdocs folder from the old to the public_html folder of the new server. I'd love to do this server to server as it'll be a lot quicker than download - upload via my broadband connection. Yours, Chris

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