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• unable to set xmx beyond 4gb on system having 8gb RAM

  - by Arun

  I need to set ANT_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m JAVA_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m I have a system with 8gb(recently upgraded from 4 gb) But once i set the ant opts to above said value I am not able to run any of my ant targets and I get the following error [ERROR] Argument error: -Xmx6144m [ERROR] Specified maximum heap size (6144 MB) is larger than the address space on this platform (4 GB). [WARN ] -XX:PermSize=1024m is not a valid VM option. Ignoring [WARN ] -XX:MaxPermSize=1024m is not a valid VM option. Ignoring Could not create the Java virtual machine. This indicates the Java that I have on my system java version "1.6.0_20" Java(TM) SE Runtime Environment (build 1.6.0_20-b02) Oracle JRockit(R) (build R28.1.0-123-138454-1.6.0_20-20101014-1351-windows-x86_64, compiled mode) and I am running a Windows 7 on Intel Core 2 duo 3Ghz processor and 8gb RAM Any pointers in solving this issue would be of great help. PS: I did google for the error and it was one of my 1st such occurence where I didnot get any links pointing to the specific solution. Maybe no one has encountered such a scenario

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• Looking for an application that scrolls or pans netbook screens running Windows

  - by therobyouknow

  I'm looking for a Windows 7 and XP compatible Windows desktop panning/scrolling tool. This is to solve a problem where some applications for example MSN have settings/preference Windows that are not resizeable. I have a Netbook with a small maximum screen resolution e.g. 1024x600. The fixed non-resizeable windows are too large for this display screen size so I cannot see all of the items on these windows, particularly the OK button to save settings. What I would like is a desktop scrolling/panning tool where if I move my mouse pointer to any edge of the display, it pans to show the region of the too-large-fixed window that I could not see. I use a Samsung N110 and Toshiba NB100 netbooks. I'm looking for: A general program that provides desktop panning/scrolling/expanded resolution to allow all regions of a non-resizeable fixed window Preferably a non-graphics hardware specific program but will accept a solution that works with both the above machines I'm NOT looking for (i.e. unsatisfactory answers others have asked that I've already searched and found): Advice on what programs to use that DON'T have the problem of fixed windows Alternative operating system solutions Plugging in an external monitor with larger resolution - I use this option but I need a solution when one is not available, e.g. while travelling etc Advice about not using small screen netbooks - I enjoy the compact convenience of them Advice about change the dpi settings in the Control Panel Display settings Advice about guesswork with the tab key to move the focus the off-screen item I cannot see Thank you in advance.

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• MAMP Pro mysqld won't start on os x lion

  - by Mike

  getting a Start MySQL Failed error in the GUI.. when i attempt to start mysqld from the CLI i get the following error: ? /Applications/MAMP/Library/bin/mysqld 120623 23:12:47 [Warning] Setting lower_case_table_names=2 because file system for /Applications/MAMP/db/mysql/ is case insensitive 120623 23:12:47 [Note] Plugin 'FEDERATED' is disabled. 120623 23:12:47 InnoDB: The InnoDB memory heap is disabled 120623 23:12:47 InnoDB: Mutexes and rw_locks use GCC atomic builtins 120623 23:12:47 InnoDB: Compressed tables use zlib 1.2.3 120623 23:12:47 InnoDB: Initializing buffer pool, size = 128.0M 120623 23:12:47 InnoDB: Completed initialization of buffer pool 120623 23:12:47 InnoDB: highest supported file format is Barracuda. 120623 23:12:47 InnoDB: Waiting for the background threads to start 120623 23:12:48 InnoDB: 1.1.5 started; log sequence number 1595675 120623 23:12:48 [ERROR] /Applications/MAMP/Library/bin/mysqld: unknown option '--skip-locking' 120623 23:12:48 [ERROR] Aborting 120623 23:12:48 InnoDB: Starting shutdown... 120623 23:12:49 InnoDB: Shutdown completed; log sequence number 1595675 120623 23:12:49 [Note] /Applications/MAMP/Library/bin/mysqld: Shutdown complete i have deleted the mysql.pid file located at /application/mamp/tmp/mysql/mysql.pid and i still get the error above. I can't find where MAMP has set --skip-locking set, my.cnf doesnt have it anywhere. Activity monitor gives me a mysqld process running by me, and everytime i KILL the process both via Activity Monitor and via kill =9 pid it starts right back up.. Sampling the process points back to the MAMP mysqld.. wtf?! About to throw MAMP out the window and boot up a VM of CentOS =)

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• Moving a site from IIs6 to IIS7.5

  - by Sukotto

  I need to move a site off of IIS6 (Win Server 2003) and onto IIS7.5 (Win Server 2008) as soon as possible. Preferably tomorrow. The site itself is a delightful mix of classic asp (vbscript) and one-off asp.net (C#) applications (each asp.net app is in its own virtual dir and has a self-contained web.config). In case it's relevant, this is a sort of research site made up of 40 or 50 unconnected microsites. Each microsite is typically a simple form allowing a user to submit a form, which then runs a Stored Proc on a sqlserver db and displays a chart and/or table of the results. There is very little security to worry about. The database connection info is in a central file (in the case of the classic asp) or app's individual web.config (lots of duplication there) To add a little spice to the exercise... I have no idea how to admin IIS The company no longer employs the sysadmin or the guys who set this thing up. (They're not going to employ me much longer either but my sense of professional pride does not permit me to just walk away from this task). The servers are on mutually firewalled networks and I have to perform a convoluted, multi-step process to copy anything from one to the other. Would someone please point me to a crash-course tutorial for accomplishing the above? I have: a complete copy of the site's filesystem on the new box installed the 3rd party charting tool on the new system a config.xml file from the "all tasks - save configuration to a file" right click menu. There doesn't seem to be a way to import it on the new system however. The newer IIS manager has a completely different UI and I'm totally lost. Please help.

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• Give Access to a Subdirectory Without Giving Access to Parent Directories

  - by allquixotic

  I have a scenario involving a Windows file server where the "owner" wants to dole out permissions to a group of users of the following sort: \\server\dir1\dir2\dir3: Read & Execute and Write \\server\dir1\dir2: No permissions. \\server\dir1: No permissions. \\server: Read & Execute To my understanding, it is not possible to do this because Read & Execute permission must be granted to all the parent directories in a directory chain in order for the operating system to be able to "see" the child directories and get to them. Without this permission, you can't even obtain the security context token when trying to access the nested directory, even if you have full access to the subdirectory. We are looking for ways to get around this, without moving the data from \\server\dir1\dir2\dir3 to \\server\dir4. One workaround I thought of, but which I am not sure if it will work, is creating some sort of link or junction \\server\dir4 which is a reference to \\server\dir1\dir2\dir3. I am not sure which of the available options (if any) would work for this purpose if the user does not have Read & Execute permission on \\server\dir1\dir2 or \\server\dir1, but as far as I know, the options are these: NTFS Symbolic Link, Junction, Hard Link. So the questions: Are any of these methods suitable to accomplish my goal? Are there any other methods of linking or indirectly referencing a directory, which I haven't listed above, which might be suitable? Are there any direct solutions that don't involve granting Read & Execute to \\server\dir1 or \\server\dir2 but still allowing access to \\server\dir1\dir2\dir3?

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• do I need to create an AD site for VPN network

  - by ykyri

  I have Windows Domain level 2008 R2. There are four GC DC in four different physical locations. I have Kerio-based VPN network for replication and remote administration. Here is how network configured: dc1: local IP: 192.168.0.10 VPN IP: 192.168.1.10 dc2: local IP: 10.10.8.11 VPN IP: 192.168.1.11 dc3: local IP: 10.10.9.12 VPN IP: 192.168.1.12 dc4: local IP: 10.10.10.13 VPN IP: 192.168.1.13 That's simple, replication and all works fine but when running dcdiag on dc3 I have an error: A warning event occurred. EventID: 0x000016AF During the past 4.12 hours there have been 216 connections to this Domain Controller from client machines whose IP addresses don't map to any of the existing sites in the enterprise. <...> The log(s) may contain additional unrelated debugging information. To filter out the needed information, please search for lines which contain text 'NO_CLIENT_SITE:'. The first word after this string is the client name and the second word is the client IP address. Here is netlogon.log lines example: 05/30 12:07:39 DOMAIN.NAME: NO_CLIENT_SITE: dc2 192.168.1.11 05/31 09:52:11 DOMAIN.NAME: NO_CLIENT_SITE: dc4 192.168.1.13 05/31 19:49:31 DOMAIN.NAME: NO_CLIENT_SITE: adm-note 192.168.1.101 07/01 05:16:26 DOMAIN.NAME: NO_CLIENT_SITE: dc1 192.168.1.10 All VPN-joined computers are generates same log line as above. Computer amd-note is for example administrator's notebook, also have VPN. Question is should I add new AD site and bind VPN subnet 192.168.1.0/24 with that site?

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• How to quickly check if two columns in Excel are equivalent in value?

  - by mindless.panda

  I am interested in taking two columns and getting a quick answer on whether they are equivalent in value or not. Let me show you what I mean: So its trivial to make another column (EQUAL) that does a simple compare for each pair of cells in the two columns. It's also trivial to use conditional formatting on one of the two, checking its value against the other. The problem is both of these methods require scanning the third column or the color of one of the columns. Often I am doing this for columns that are very, very long, and visual verification would take too long and neither do I trust my eyes. I could use a pivot table to summarize the EQUAL column and see if any FALSE entries occur. I could also enable filtering and click on the filter on EQUAL and see what entries are shown. Again, all of these methods are time consuming for what seems to be such a simple computational task. What I'm interested in finding out is if there is a single cell formula that answers the question. I attempted one above in the screenshot, but clearly it doesn't do what I expected, since A10 does not equal B10. Anyone know of one that works or some other method that accomplishes this?

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• Changing time intervals for vSphere performance monitoring, and is there a better way?

  - by user991710

  I have a set of experiments running on a cluster node which is running ESXi 5.1, and I want to monitor the resource consumption on the node itself. Specifically, I am currently running experiments on a subset of the VMs on the ESXi host and wish to monitor resource consumption on those specific VMs. Right now, since I'm using only a single ESXi host, I am using vSphere to access it and the performance reports. Ideally, I would like to get these reports for different time intervals. I can already get the charts for a time interval of 1h, but these are rather long-running experiments and something like 2h, 3h,... would be preferable. However, I cannot seem to change the time interval. Here is an example of what my Customize Performance Chart dialog shows: I am also running on a trial key at the moment. How can I change this interval? Do I need a standard license, or do I just need to turn off the VM (unlikely, but I haven't attempted it yet as these are long-running experiments)? Any help (or pointers to documentation which deals with the above -- I've already looked but did not find much) would be greatly appreciated.

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• moving files and directories between two machine, via a third, preserving permissions and usernames

  - by Jarmund

  The situation is as follows: Machine A has a file repository accessible via rsync Machine B needs the above mentioned files with all permissions and ownerships intact (including groups etc) Machine C has access to both A and B, but has a completely different set of users. Normally, i would just rsync everything over, directly between A and B, but due to severely limited bandwidth at the moment, i need something different, as rsync times out after building the list of the 430 files (49Mb uncompressed... can be compressed down to ~7Mb). What i've tried so far: rsync everything over from A to C, tar it, copy the tarball over, and then untar it, however, this messes up the ownership and/or the permissions. To rsync it from A to C, i run this command: rsync --numeric-ids --password-file=/root/rsync_pwd_file -oaPvu rsync://[email protected]/portal_2/ ./portal_2/ ...and from the looks of things, they do end up on C with the correct ownerships/permissions/flags/everything (not 100% sure, though.. are there any more switches i can throw in there? did i miss something?) copying the tarball over is simple enough (slow as a one-legged turtle due to the bandwidth, but it checksums out alright) What i'm unsure of is the flags and switches for creating and extracting the tarball, so could someone please provide the full commands for creating a tarball from /root/portal_2 on machine C (with everything intact) and extracting the tarball into /var/ex/portal_2 on machine B? ? Also, are there any other approaches worth mentioning that could allow me to perform this? I have root access to A and C, whereas i only have rsync access to B. PS: I'm running rsync v2.6.9 on machine B, and unfortunately i do not have the oportunity to upgrade to v3

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• Combat server downtime by duplicating server and re-routing when main server is down

  - by Wasim

  I have a CentOS server which at times either crashes or gets attacked with DDOS. At the moment I have an off site backup which is filled up with 1.7TB of data. I'm currently paying as much for the backup as I am for the server and I was looking for advice from experienced people as to what option is best to proceed from here. Would it be a viable solution to ditch the offsite backup, and instead purchase an additional server which is an exact duplication of the first server. So if the first server is down, users are re-routed to the second server without noticing the first server is even down. This would create an automatic backup of the first server (albeit not offsite) and relinquish the need for the expensive offsite backup. Is the above solution a true solution to pricey backup or is offsite backup absolutely necessary? How would I go about doing this (obviously it's pretty complex so just links to some reading material or the terminology of the procedure would be great)? Appreciate the help and advice.

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• Use autocomplete in dropdown cells with Excel 2007?

  - by Martin

  I want to make a survey with Excel and I therefore have defined the cells for the answers as a dropdown cell which only accepts answers from a certain list, e. g.: The two Lists List1 and List2 (yellow cells) are the possible answers for the questions in Block 1.x resp. 2.x (blue) . There might be a block 4 with more questions, which again use List1 for their possible answers. My problem is: I'd like to be able to use the autocompleate feature to fill in the blue cells with the dropdown menu, so that the user only types 5 and it automatically expands to "5: extremely important" or "5: extremely difficult". According to my research on the www, this should be possible if I add the list with possible answers directly above the cells where autocomplete should work (I did this with the green helper cells which could be hidden) . But I have to enter at least 4 characters 5: e to get the autocompleted suggestion. Is there a way to make autocomplete already replace a "5" by the corresponding valid term? As the survey file shall be distributed to a lot of people "outside", I can not use VBA magic because it may be blocked on their computer and might not work. EDIT: it seems to have to do with the numbers I use: If I'd start my List items with A, B, C instead of 1, 2, 3, it would work perfectly. Excel seems to ignore the pure numbers when they are entered and does not try to autocomplete them.. is there a workaround? (I hope it is clear what I want, it seems a little difficult to explain.)

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• KVM and libvirt: How to configure a new disc device to an existing VM?

  - by initall

  I've got an Ubuntu 9.04 server running two VM's. In /etc/libvirt/qemu/machine1.xml two disk devices are defined like this: <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/vserver/machine1/disk0.qcow2'/> <target dev='hda' bus='ide'/> </disk> <disk type='file' device='disk'> <source file='/vserver/machine1/disk1.qcow2'/> <target dev='hdb' bus='ide'/> </disk> I need more storage space in at least one of the devices and thought about adding a third hdc device by simply adding one with same style as above and re-organising my mount structure (The virtual sizes of the current qcow2 files are unfortunately limited.) My problem is that reloading libvirtd and restarting the VM do not result in a new visible device (checked with fdisk). I'm aware of extending an existing qcow2 file (converting to raw format, cat-ing/adding the new one, using smth. like gparted) - but only as a last resort. Hopefully it's something very simple I'm missing?

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• How do I restore tab-completion on shell variables on the bash command-line?

  - by Eric

  I've long set my most-recently visited directories to shell variables d1, d2, etc. On an ancient Fedora machine I could type a command like $ cp $d1/ and the shell would replace $d1 with text like /home/acctname/projects/blog/ and would then show me the contents of .../blog, like any tab-completion. Now, both ubuntu wheezy/sid and fedora 16 just -escape the '$', and naturally there are no completions to show. You can see this behavior in action in an OSX Terminal window. On 10.8, do something like ls $HOME/ to see what I mean. Is there a bash shell variable or option that can restore the old behavior? man bash suggests this is a bug: complete (TAB) Attempt to perform completion on the text before point. Bash attempts completion treating the text as a variable (if the text begins with $), username (if the text begins with ~), hostname (if the text begins with @), or command (including aliases and functions) in turn. If none of these produces a match, filename completion is attempted. I get the above described completion when a token starts with '~' or a letter. It's just '$'-completion that's broken.

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• Problem with ubuntu 10.10 running from USB drive

  - by Surjya Narayana Padhi

  I recently downloaded Ubuntu 10.10 and created an USB drive with that. I started to run the Ubuntu from that USB drive. But I am facing so much problem. I am thinking why its not so much easy like Windows to do all my job in ubuntu. Always I get some error message or to install something. This time I am getting the following errors. I am trying to download and install Aircrack-ng. So used the command sudo apt-get install aircrack-ng. But the installation stops with the following error : update-initramfs: deferring update (trigger activated) cp: cannot stat `/vmlinuz': No such file or directory dpkg: error processing bcmwl-kernel-source (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: initramfs-tools bcmwl-kernel-source E: Sub-process /usr/bin/dpkg returned an error code (1) I don't even have the aptitude command installed till now. Are all these errors because of I am running the ubuntu from USB drive? Is there any simple and easy way to go to Ubuntu Software Center and download all the required essentials at one shot and then Aircrack-ng? I could not find the Aircrack-ng in Ubuntu Software Center Can anybody give me detail steps to solve all my problems above. I am frustrated searching for updates and installations. When something works and something does not work. Can anybody suggest me how I should proceed after installing ubuntu to run on a USB drive. So that I can use the OS like Windows. Like software download,wireless driver, sound, video, documents, C:, D: all things should be there. Please somebody help.

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• Having munin server monitoring problem: Graphs not being generated.

  - by geerlingguy

  When I run munin-cron (munin-cron --debug), I get the following error: 2010/05/10 13:39:01 [WARNING] Call to accept timed out. Remaining workers: archstl.org;archstl.archstl.org 2010/05/10 13:39:01 [DEBUG] Active workers: 1/8 These errors simply keep repeating themselves until I quit munin-cron. I've followed the directions for debugging munin on the 'Debugging Munin plugins' wiki page, but I get the following results when going through their directions: After telnetting to localhost 4949, I can see a list of plugins, see a node at archstl.archstl.org, but can't fetch anything. The output is as follows: >fetch cpu . However, on the same machine (which is both the node and the master munin server), I can run munin-run cpu, and it prints the results correctly to the command line, like so: user.value 100829130 nice.value 3479880 system.value 13969362 idle.value 664312639 iowait.value 12180168 irq.value 14242 softirq.value 199526 steal.value 0 Looking at the wiki page mentioned above, it looks like it might be a plugin environment problem, but I can't figure out how to fix/change this... If the plugin does run with munin-run but not through telnet, you probably have a PATH problem. Tip: Set env.PATH for the plugin in the plugin's environment file.

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• Slow upload, fast download on Windows 7 64bit system

  - by Malik

  I've got a weird problem in the download speeds on my desktop PC (Windows 7 Home Premium 64bit) are consistently fast (approx. 400kB/s) but uploads are very slow (around 6-10kB/s). This has been going on for the last 3 weeks or so. I am a very competent user and troubleshooter, and have searched online for 2 weeks for a solution, to no avail. Part of the problem is that internet is provided by WiFi by my landlord and I have no access to the router (BT Home Hub router) although I know for sure he wouldn't have the first idea on how to restrict my usage :) (rules that out) Anyway, I've tried: - various drivers (my Wifi 'card' is TP-link TL-WN851N, and I've tried TP-link + Atheros + Qualcomm Atheross drivers, suggested by Microsoft) - various tweaks to network parameters (e.g. as suggested by SpeedOptimser) - various tweaks to Windows 7 services (e.g. disabling/manual-ing unecessary services) - raising and lowering head onto a reasonably firm surface at moderate frequency (jk :D) None of the above have helped, and I'm officialy asking for help now!! Thanks for your time and effort in advance!

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• How can I use my cell phone to establish a dial-up networking connection?

  - by gWiz

  I am using Windows 7 and have a BlackBerry with T-Mobile (U.S.). I have paired the phone with my computer over Bluetooth, which automatically creates a serial port for it. I am able to open the port in PuTTY and successfully issue AT commands to the modem, including dialing. However, while using Windows to create and establish a Dial-Up Networking connection, I get an error dialog stating "Error 678. The remote computer did not respond." In my testing, I also tried setting up a connection to dial a number connected to a phone. When attempting to connect over this connection, the phone does ring but the very moment I answer the call, my computer displays the above error dialog. What must be done to successfully establish such a PPP connection? Some special AT initialization string perhaps? To clarify, I'm not referring to the well-described and popular technique known as "tethering," in which the remote host of the data link is the mobile service provider. I am interested specifically in establishing direct data links with remote hosts other than my mobile service provider. Think old-school landline connection to your friend's computer or BBS. Edit 1 As grawity pointed out in comments, the missing piece of the puzzle is the actual modulator that is compatible with v-series protocols, which I expected to be built into the cellphone. So far the best only software alternative I could find is this experimental project. Edit 2 Found this forum discussion today. The participants state that there is no old-school modem in the BlackBerry. Edit 3 When I place a call in PuTTY with ATD, immediately after the call is answered (and the callee is initiating the handshake) the cellphone returns OK. This is not the expected behavior for establishing a data connection. The phone should reciprocate the handshake, and upon success return CONNECT. (Alternatively it should return BUSY or NO CARRIER, but never simply OK.) Windows DUN must be interpreting this as the "Error 678" I was seeing.

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• How to kill ostensibly immortal process?

  - by DeeDee

  I had some huge file transfers operating on an NFS mount. The server on which the mount point resided was carelessly rebooted, and now the server from which these large transfers were initiated seems to be bogged down by them. If I run top, I see the following: The first thing I tried was to run kill with each the -1 -2 -9 and -15 flags, and each of the process ids shown above in turn. This allowed me to proceed, but didn't kill the processes. The next thing I attempted was to reboot the server, but neither reboot nor shutdown -r now worked. When I ran shutdown -r now the standard broadcast message was sent out, but the sever did not reboot. I confirmed this by looking at the server uptime, which was 25 days. So now I'm a little stuck. I'm running these commands as root. EDIT: Here's another interesting tidbit: In top, I don't see that any other processes are using more than a fraction of a percent of memory or more than 5% of CPU. EDIT 2: output of /var/log/messages

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• Distributed storage and computing

  - by Tim van Elteren

  Dear Serverfault community, After researching a number of distributed file systems for deployment in a production environment with the main purpose of performing both batch and real-time distributed computing I've identified the following list as potential candidates, mainly on maturity, license and support: Ceph Lustre GlusterFS HDFS FhGFS MooseFS XtreemFS The key properties that our system should exhibit: an open source, liberally licensed, yet production ready, e.g. a mature, reliable, community and commercially supported solution; ability to run on commodity hardware, preferably be designed for it; provide high availability of the data with the most focus on reads; high scalability, so operation over multiple data centres, possibly on a global scale; removal of single points of failure with the use of replication and distribution of (meta-)data, e.g. provide fault-tolerance. The sensitivity points that were identified, and resulted in the following questions, are: transparency to the processing layer / application with respect to data locality, e.g. know where data is physically located on a server level, mainly for resource allocation and fast processing, high performance, how can this be accomplished? Do you from experience know what solutions provide this transparency and to what extent? posix compliance, or conformance, is mentioned on the wiki pages of most of the above listed solutions. The question here mainly is, how relevant is support for the posix standard? Hadoop for example isn't posix compliant by design, what are the pro's and con's? what about the difference between synchronous and asynchronous opeartion of a distributed file system. Though a synchronous distributed file system has the preference because of reliability it also imposes certain limitations with respect to scalability. What would be, from your expertise, the way to go on this? I'm looking forward to your replies. Thanks in advance! :) With kind regards, Tim van Elteren

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• Multi monitor setup with a tv as well?

  - by jasondavis

  I have always had a dual monitor setup for my pc's for years now. I am now in the market to build a new PC and get some new stuff. I need some help or advice on how to run 3 monitors WITH a 4th display which will be a lcd/plasma tv. So I am thinking I can get 2 video cards and that will give me all the hookups to run 3 monitors instead of 2. I will mount all 3 monitors in a row side by side and above them on the wall I would like to mount a larger 30-40+ inch lcd or plasma tv. I would then like to hook up my atelite/cable to this tv just as I would normally hook up a tv but I would like to also be able to have an option to view my PC o this tv as well. I know that is possible but would it be possible to view my PC on that tv and also still view my 3 other monitors and have the TV be a 4th display, where I could dock a different app/window in windows in all 4 displays (3 monitors + tv) ?? Please tell me any tips/advice on how to do this including what cables/software if any/converters/ you name it. Thanks for any help

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• Virtual machine lost after power cut

  - by dannymcc

  We have just had a power issue and our ESX (ESXi 4.1.0) host lost power and then rebooted. All but one of the virtual servers have rebooted with no problem, however one of them refused to power up. I try to power it on and I get the following error: File <unspecified filename> was not found Reason: The system cannot find the file specified. Cannot open the disk '/vmfs/volumes/4e03076e-90834647-b846-001185c38f42/LAMP- Stack/turnkey-lamp-11.3-lucid-x86.vmdk' or one of the snapshot disks it depends on. VMware ESX cannot find the virtual disk "/vmfs/volumes/4e03076e-90834647-b846- 001185c38f42/LAMP-Stack/turnkey-lamp-11.3-lucid-x86.vmdk". Verify the path is valid and try again. I have logged into the ESX host to see if the file is there an have found only the following file that matches the filename: /vmfs/volumes/4e03076e-90834647-b846-001185c38f42/LAMP-Stack/turnkey-lamp-11.3-l ucid-x86-s001.vmdk I notice that the above file has '-s001' after the filename. Is this recoverable? Any help of advice is greatly appreciated! EDIT: Running ls -l on the directory that contains the file shows this: drwxr-xr-t 1 root root 1680 Feb 9 09:49 4e03076e-90834647-b846-001185c38f42 The databrowser file system looks like this: and in a different directory there is the file that matches the missing one:

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• Windows Not Honoring DHCP Scope

  - by jerhinesmith

  Please bear with me as I'm not a networking person by trade. Our current configuration at work includes two Windows Servers serving as DHCP/Active Directory servers (if that makes sense) -- one replicating from the other. On both machines, the DNS resolution is set up as: Main Windows Box (10...* address) Public IP Address (for Verizon) Public IP Address (secondary Verizon) Secondary Windows Box (10...* address) Assuming our domain is foo.com, we maintain the foo.com website on a hosted VPS with it's own IP address. The problem is that even though bar.foo.com is an internal server and is defined in DNS on the Primary Windows machine, when I ping bar or even bar.foo.com it resolves to the hosted IP address instead of the 10.* address. I tried taking both of the Public IP addresses out of the DHCP scope, and that seemed to work, but it completely slowed down access to any external sites, so that wasn't acceptable. I also tried adding the two Windows machine as the DNS servers on my desktop. That too worked, but I'd rather not have everything enter their DNS servers, as the above setup should theoretically be working. Is there anything I could check to see why pinging bar.foo.com isn't resolving to the DNS entry on the Windows machines? Here's a summary of the ping results, if they help: Pinging from servers with static IP bar.foo.com resolves with correct IP address Pinging from linux machines not joined to the domain bar.foo.com resolves with correct IP address Pinging from user's desktop machines, joined to the domain, but dynamic IP bar.foo.com resolves with incorrect IP address This is driving me crazy!

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• How may I retrieve data from an Excel table based on a variable number of criteria?

  - by Eshwar

  I have the following salary data for example: Country State 2012 2013 -> 2027 ======= ===== ==== ==== China Other 1000 1100 China Shanghai 1310 1400 China Tianjin 1450 1500 India Orissa 1500 1600 So now in another Excel sheet I would want an answer to one of the following questions: What is the salary in Shanghai for 2013? (Answer would be 1400) What is the salary in Hubei province for 2012? (Since it is not listed, use "Other" - 1000) What is the average salary in China for 2013? (Answer would be 1450) What is the highest salary in China for 2012? (Answer is Tianjin) So as in the above order of priority, I would like those numbers in another Excel sheet using some form of query. I considered PivotTables but I was wondering if there is another much better more efficient way of doing this? I imagine SQL is suited for this but I am not clued up on that. Some Excel functionality is much rather preferred. Also suggestions on an appropriate format of data for such queries would be appreciated.

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• In which order does Excel process its formulae?

  - by dwwilson66

  I've got a fairly large spreadsheet with major calculations going on, and it's starting to slow down every time a value that's part of a calculated field is modified. I'm in the process of optimizing the file, adding arrays where I can, and seeing where I can shave off a few milliseconds here and there. Let's say there's data in Columns A-H. Column H is set based on relationships between values in Columns A, B and C, which change dynamically from an outside program. Users enter the data in Column F. Formulas in D & E calculate relationships between F & H and H & D, respectively. How does Excel manage formulae in the case, for instance, where they're dependent on data further into the sheet? Will my value in H be available the first time that the formulae in D & E calculate? or, will D & E calculate based on an old value for H, because H's update hasn't happened yet? Are there any efficiencies to be gained by positioning dependencies in particular rows or columns in the speadsheet? Do positions above and left the current position get processed sooner than things below and to the right?

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• Router vs switch in a LAN [closed]

  - by servernewbie

  If I have a LAN and and connect it with a switch, I understand it uses a CAM table to route packets in layer 2 (by saving mac to port relations). So far all good. However, when using a router for a LAN (ONLY for a LAN, not to connect it to "the outside" WAN/internet/etc) I get a bit confused as to how it internally processes packets. I would first split this into two router scenarios: Router with buit-in switch In this scenario, I would expect that it will act exactly as a switch with a CAM table internally. This would probably benefit a bit in speed (guessing here?) compared to the next option. Router without built-in switch Here is where I get confused. If hostA wants to send a packet to hostB, it will ARP to find hostB's MAC address and send it there. Now, if we had a switch (above scenario) this would be easy. But how does it work now in a router WITHOUT a switch? If I would guess, hostA would send an Ethernet frame with hostB's MAC address to the line. The router would fetch the packet (even though the router has another MAC address, it would still fetch this packet even if it only contains hostB's MAC address). It would strip the Ethernet frame header and check the IP, and then check its own internal ARP table again for the MAC address. Now, this would seem like a waste of resources compared to a router with a built-in switch. But maybe it does not work like that at all. Does it also contain a CAM table? If that would be true, what would then the difference between these two routers really be?

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