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• Why do some languages recommend using spaces rather than tabs?

  - by TK Kocheran

  Maybe I'm alone in this, but few things annoy me like people indenting using spaces rather than tabs. How is typing SpaceSpaceSpaceSpace easier and more intuitive than typing Tab? Sure, tab width is variable, but it's much more indicative of indentation space than spaces. The same thing goes for backspacing; backspace once or four times? Why do languages like Python recommend using spaces over tabs?

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• Almost time to hit the road again

  - by Chris Williams

  I’ve had a few months of not much traveling, but now that the weather is improving… conference season is starting up again. That means it’s time for me to start hitting the road. In June, I have Tech Ed 2010 in New Orleans, LA. I lived in New Orleans for several years, both as military and civilian and I have a few friends still down there. I haven’t been there since before Hurricane Katrina, so I have mixed feelings about returning… but I am still looking forward to it. Also in June, I have Codestock in Knoxville, TN. Codestock is one of my favorite events, primarily because of the excellent people that speak there and also attend sessions. It’s a great mix of people and technologies. Sometime in July or August, I’m headed to Austin, TX for a couple days. I don’t know the exact date yet, but if you have an event down there in that timeframe, let me know and maybe we can sort something out. In September, I’m heading to Seattle for my first PAX (Penny Arcade Expo.)  I’m going strictly as an attendee and it looks like a LOT of fun. Really excited to check it out. Also in September, I’m headed to Omaha for the Heartland Developers Conference. This is a FANTASTIC event, and certainly one of my local favorites. (I guess local is relative, it’s about a 6 hour drive.) In addition to speaking on WP7, I’ll be doing a series of hands on labs on XNA they day before the conference starts, so that should be a lot of fun as well.   In addition to all this stuff, I have my own XNA User Group to take care of. In August, Andy “The Z-Man” Dunn is coming to speak and check out the various food on a stick offerings at the Minnesota State Fair!

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• Sharepoint site settings add on ssl port number?

  - by Mike

  WSS 3.0 IIS6/WinSever2003 CAG We have several WSS sites on a SharePoint WSS box that talk to the outside, all of which are SSL enabled. So you get a CAG(Citrix Access Gateway) to translate the 443 port to the local ssl port on the server. Everything is set up and works fine until you get into the Site Settings and start rooting around, it seems like a very unstable link library. Links will try to use the local ssl port number instead of the 443 standard; it will try to skip the step. Is that the site? Any ideas on how to fix it?

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• Emails not being delivered

  - by Tomtiger11

  Comment pointed out that this may fix my problem, and it did: Why don't mails show up in the recipient's mailspool? I use Postfix with Dovecot, and when I send an email from my gmail to my server, it is received at the server, but not at my email client using POP3. I can verify it being received at the server using the mail command. This is my main.cf: queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix mail_owner = postfix myhostname = tom4u.eu myorigin = $myhostname inet_interfaces = all inet_protocols = all unknown_local_recipient_reject_code = 550 relay_domains = $mydomain alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases debug_peer_level = 2 debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5 sendmail_path = /usr/sbin/sendmail.postfix newaliases_path = /usr/bin/newaliases.postfix mailq_path = /usr/bin/mailq.postfix setgid_group = postdrop html_directory = no manpage_directory = /usr/share/man sample_directory = /usr/share/doc/postfix-2.6.6/samples readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES smtpd_tls_cert_file = /etc/postfix/certs/cert.pem milter_protocol = 2 milter_default_action = accept smtpd_milters = inet:localhost:8891 non_smtpd_milters = inet:localhost:8891 smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtpd_sasl_local_domain = $myhostname smtpd_recipient_restrictions = reject_non_fqdn_recipient,permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination,permit broken_sasl_auth_clients = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth If you could help me with this, I'd be most grateful, if you need any more information, please ask. var/log/maillog: May 30 22:44:25 tom4u postfix/smtpd[18626]: connect from mail-we0-f181.google.com[74.125.82.181] May 30 22:44:25 tom4u postfix/smtpd[18626]: 318F679B7F: client=mail-we0-f181.google.com[74.125.82.181] May 30 22:44:25 tom4u postfix/cleanup[18631]: 318F679B7F: message-id=<CAA_0zdxY-WUFGOC57K_yVn0G+5hN=8KSXuohJqMDB5Rm7bqu8w@mail.gmail.com> May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: mail-we0-f181.google.com [74.125.82.181] not internal May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: not authenticated May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: DKIM verification successful May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: s=20120113 d=gmail.com SSL May 30 22:44:25 tom4u postfix/qmgr[16282]: 318F679B7F: from=<[email protected]>, size=1720, nrcpt=1 (queue active) May 30 22:44:25 tom4u postfix/smtpd[18626]: disconnect from mail-we0-f181.google.com[74.125.82.181] May 30 22:44:25 tom4u postfix/local[18632]: 318F679B7F: to=<[email protected]>, relay=local, delay=0.17, delays=0.12/0.01/0/0.03, dsn=2.0.0, status=sent (delivered to mailbox) May 30 22:44:25 tom4u postfix/qmgr[16282]: 318F679B7F: removed May 30 22:45:32 tom4u dovecot: pop3-login: Login: user=<tom>, method=PLAIN, rip=SNIP, lip=176.31.127.165, mpid=18679 May 30 22:45:32 tom4u dovecot: pop3(tom): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0 May 30 22:46:32 tom4u dovecot: pop3-login: Login: user=<tom>, method=PLAIN, rip=SNIP, lip=176.31.127.165, mpid=18725 May 30 22:46:32 tom4u dovecot: pop3(tom): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0

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• Why my AD domain doesn't work on my laptop

  - by Frederick Marcoux

  I have installed Windows Server 2008 R2 on a virtual machine with a bridged network card and installed Active Directory. I configured it and when I try to connect my laptop to the domain name, in this case, creationsmicroweb.ca (doesn't exist, don't try, for local only), I can't get connected. My laptop just doesn't see it. I don't know why! There's a resume of my config: Domain Name: creationsmicroweb.ca Forest: new, principal domain controller IP: Fixed (192.168.1.100) DNS Name: none (just for local, I ignored them) NETBIOS name: MICROWEB If someone as found why, please help me! This is for my business that I'm starting and I can't find why it doesn't work!

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• Make Windows Task Scheduler alert me on fail

  - by acidzombie24

  I have an automated script that pulls backups from my website to my local computer. Once my server was down, another time i accidentally move my script. How do i make Windows Task Scheduler tell me with the script fails (or doesnt run/not found)? I dont care if a prompt comes up, an email or something that appears on my desktop. I want to be notified if something goes wrong. On my server crontab emails me about errors which is great. I want something like that on my windows 7 local computer.

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• email arrival notifier

  - by srish

  How can I get an alert in my local system when I got a mail even though I haven't signed in?

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• Inconsistency between date-time in terminal and clock

  - by Franck

  I can't figure out why I have 5 hours difference between GUI clock and date command in terminal. My bios clock is set to GMT... Any ideas ? franck@franck-ThinkPad-T61:~$ date mercredi 11 avril 2012, 02:48:47 (UTC-0500) franck@franck-ThinkPad-T61:~$ sudo dpkg-reconfigure tzdata Current default time zone: 'Europe/Paris' Local time is now: Wed Apr 11 09:49:02 CEST 2012. Universal Time is now: Wed Apr 11 07:49:02 UTC 2012. franck@franck-ThinkPad-T61:~$ tail /etc/timezone Europe/Paris franck@franck-ThinkPad-T61:~$ date mercredi 11 avril 2012, 02:49:21 (UTC-0500) franck@franck-ThinkPad-T61:~$ sudo dpkg-reconfigure --frontend noninteractive tzdata Current default time zone: 'Europe/Paris' Local time is now: Wed Apr 11 09:49:27 CEST 2012. Universal Time is now: Wed Apr 11 07:49:27 UTC 2012. franck@franck-ThinkPad-T61:~$ date mercredi 11 avril 2012, 02:49:30 (UTC-0500) franck@franck-ThinkPad-T61:~$ sudo cat /etc/default/rcS # # /etc/default/rcS # # Default settings for the scripts in /etc/rcS.d/ # # For information about these variables see the rcS(5) manual page. # # This file belongs to the "initscripts" package. TMPTIME=0 SULOGIN=no DELAYLOGIN=no UTC=yes VERBOSE=no FSCKFIX=no franck@franck-ThinkPad-T61:~$ sudo hwclock --show mer. 11 avril 2012 07:49:48 CDT -0.555705 secondes

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• 1.6 or 1.7: Browser side Java version for Oracle VM console

  - by katsumii

  I noticed one of the recent FAQ in OVM forum is about console.OTN Discussion Forums : Oracle VM Server for x86vnc console not running on Oracle VM 3.1.1 One of the variable for running console is Java version. I myself hit the bug below on Windows with JDK1.7 This is Windows only bug. I had success with JDK1.7 on Linux.Bug ID: 7191616 javaws.exe crashes when starting jnlp filejnlp file provided in the steps to reproduce always crashes javaws.exe in Java 7 Update 6.No problems in Update 4

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• Sharing folder in a Virtual Private Windows Server 2008 R2 ?

  - by Triztian

  See Edit 2: Hello all, seems my involvement with computers has grown and I've found my self in the need to access a shared folder on a server. I've read some documentation and managed to set up the folder as a share, for this I created a local group and for now just one local user that has access to the share, the folder is in the public user folder and it's permissions should be (and I believe they are) read/write. The problem is that I can't connect from a remote machine I mean I don't know how the way it should be accessed, the server has a public IP and we use it also as a host to our website I don't know if that affects it though, the folder will be used as the "keeper" for the QuickBooks company files and has the database server manager installed. I've tried setting up a VPN Connection to the but no success. The server has a domain name a "http://www.example.com" that redirects to our website, I am unsure if it could be accessed that way, also the share has a location displayed when I right-click properties Heres what I've tried Setting up a VPN Connection (Windows Vista and 7) Got to the point where I got asked for credential and entered the user I created (which is not an admin) but I got a "Connection fail error 800" I suppose this is because in the domain field I entered the servers workgroup. right-click add network connection (Windows 7) Went through the wizard until I reached the point of entering the location, tried many things, the name in the share's properties(\\SOMETHING\Share), the http://www.example.com , the IP address I'm quite unfamiliar with this, so I have my guesses: Since the group and user are local they do not have access to the folder. The firewall in the server is blocking my connection. Anyways, any help and guidence is truly appreciated. EDIT 1: As @tony roth pointed out it may be a security fail, an I commented it out to management and said that that is not an issue, so please bare with me. EDIT 2: I've found out that the real question could be streamlined to "Sharing folder in a Virtual Private Server?", as thats what we have, a virtual private windows server 2008 R2, and I would like to know how to make it show like a normal folder in the client computer. Thanks again for all of your support.

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• Optimal communication pattern to update subscribers

  - by hpc

  What is the optimal way to update the subscriber's local model on changes C on a central model M? ( M + C - M_c) The update can be done by the following methods: Publish the updated model M_c to all subscribers. Drawback: if the model is big in contrast to the change it results in much more data to be communicated. Publish change C to all subscribes. The subscribers will then update their local model in the same way as the server does. Drawback: The client needs to know the business logic to update the model in the same way as the server. It must be assured that the subscribed model stays equal to the central model. Calculate the delta (or patch) of the change (M_c - M = D_c) and transfer the delta. Drawback: This requires that calculating and applying the delta (M + D_c = M_c) is an cheap/easy operation. If a client newly subscribes it must be initialized. This involves sending the current model M. So method 1 is always required. Think of playing chess as a concrete example: Subscribers send moves and want to see the latest chess board state. The server checks validity of the move and applies it to the chess board. The server can then send the updated chessboard (method 1) or just send the move (method 2) or send the delta (method 3): remove piece on field D4, put tower on field D8.

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• System broken after installing Gtk+-3.4.1 with broadway backend enabled

  - by Roman D. Boiko

  I am running Ubuntu 11.10 from VirtualBox. I installed Gtk+ 3.4.1 (latest stable release) from sources with X11 and broadway backends enabled. In order to do that, I also installed latest versions of glib, libffi, libtiff, libjped, gdk-pixbuf, and pango. Each of them was configured with default options. I.e., they were installed to /usr/local (at least, I see respective folders in /usr/local/include). After reboot and login (regardless which user), desktop is grey for about 30 sec, nothing is displayed. Then Nautilus starts, but nothing else (my locale is Ukrainian, but there is nothing important in text): . During boot, I can access command prompt as root, use dpkg, etc. But I don't know what to do. One idea is to reinstall Gtk+ and other libraries with prefix /usr or /usr/shared. I will try that, but it is quite time-consuming, so any ideas would be welcome. Reverting to earlier snapshot is still possible, but it is 6 days old and I would like to try to solve the problem.

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• rsnapshot intervals in configuration file...

  - by Patrick

  A simple question about rsnapshot. In order to perform daily backups I'm going to add lines to cron in my Ubuntu. Then, why do I have also these lines in the rsnapshot.conf ? ######################################### # BACKUP INTERVALS # # Must be unique and in ascending order # # i.e. hourly, daily, weekly, etc. # ######################################### interval hourly 6 interval daily 7 interval weekly 4 #interval monthly 3 If I use cron, should I disable them ? thanks ps. I've just realized that in the crontab I still have "hourly" and "daily". Should I then uncomment only the one I use in the crontab ? And what's the point to specify hourly if it is already specified in cron ? I'm a bit confused. # crontab -e 0 */4 * * * /usr/local/bin/rsnapshot hourly 30 23 * * * /usr/local/bin/rsnapshot daily

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• Tab Completion In Emacs shell-mode SSH Sessions

  - by Sean M

  My current use pattern of emacs results in my having several shell-mode buffers open, each running an ssh session. I am running into an issue with this, though - when I try to tab-complete file names and other things in my remote session, the shell attempts to use completions available on the local machine instead of on the remote machine. For example, if the file ~/foobar exists on the local machine and ~/frob exists on the remote machine, typing in ~/f and pressing tab results in ~/foobar instead of completing correctly. If I use ssh outside of emacs and try the same thing, I get the correct completion of ~/frob instead. How can I get tab-completion to complete the way it does in normal ssh sessions ?

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• ESXi v5.5 is having random crashes

  - by Darkmage

  HW: Type: HP Proliant ML350 G5 RAM 22GB CPU 1 x Intel Xenon E5405 2.00GHz OP: ESXi 5.5 just updated from 5.1 to try and fix the crashes occurring on ESXi 5.1 on same hardware. I'm trying to find the error on why one of our servers is crashing, it has had two lock ups in 24 hours now. The internal error light on the front is blinking red, on the inside only "#5 and #6 page 76 manual" the "Processor 2" light "amber" and the "Power" light "green" is shining. in the logs the only errors i can see in the relevant time frame is in log under. Is this the reason? or is there anything else i can do to try and log/locate the error. from zcat syslog.6.gz | less 2014-05-26T11:55:47Z sfcbd[35064]: Error opening socket pair for getProviderContext: Too many open files 2014-05-26T11:55:47Z sfcbd[35064]: Failed to set recv timeout (30) for socket -1. Errno = 9 2014-05-26T11:55:47Z sfcbd[35064]: Failed to set timeout for local socket (e.g. provider) 2014-05-26T11:55:47Z sfcbd[35064]: spGetMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:55:47Z sfcbd[35064]: rcvMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:55:47Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:55:47Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:55:47Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:55:47Z sfcbd[35064]: Error opening socket pair for getProviderContext: Too many open files 2014-05-26T11:55:47Z sfcbd[35064]: Failed to set recv timeout (30) for socket -1. Errno = 9 2014-05-26T11:55:47Z sfcbd[35064]: Failed to set timeout for local socket (e.g. provider) 2014-05-26T11:55:47Z sfcbd[35064]: spGetMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:55:47Z sfcbd[35064]: rcvMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:55:47Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:55:47Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:55:47Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:55:53Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:55:57Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:01Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:04Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:15Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:17Z sfcbd[35064]: Error opening socket pair for getProviderContext: Too many open files 2014-05-26T11:56:17Z sfcbd[35064]: Failed to set recv timeout (30) for socket -1. Errno = 9 2014-05-26T11:56:17Z sfcbd[35064]: Failed to set timeout for local socket (e.g. provider) 2014-05-26T11:56:17Z sfcbd[35064]: spGetMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:56:17Z sfcbd[35064]: rcvMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:56:17Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:17Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:17Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:17Z sfcbd[35064]: Error opening socket pair for getProviderContext: Too many open files 2014-05-26T11:56:17Z sfcbd[35064]: Failed to set recv timeout (30) for socket -1. Errno = 9 2014-05-26T11:56:17Z sfcbd[35064]: Failed to set timeout for local socket (e.g. provider) 2014-05-26T11:56:17Z sfcbd[35064]: spGetMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:56:17Z sfcbd[35064]: rcvMsg receiving from -1 35064-9 Bad file descriptor 2014-05-26T11:56:17Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:17Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:17Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:23Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:27Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:31Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:34Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:34Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:34Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:34Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:34Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:44Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:44Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:44Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:44Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:46Z sfcb-ProviderManager[34828]: SendMsg sending to 1 34828-9 Bad file descriptor 2014-05-26T11:56:48Z sfcbd[35064]: Error opening socket pair for getProviderContext: Too many open files -- manual

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• Outlook 2010: using signatures stored on network

  - by Gregory MOUSSAT

  With Outlook before the 2010 version, it was possible to specify any path for the signatures. With Outlook 2010, the only way is to use those stored into C:\Documents and Setting\UserName\Local Settings\Application Datas\Microsoft\Signature\ I'd like to point the signatures to a network share. Allowing us to modify the signatures into the share, instead of login on every computers each time we are asked to modify them (and this is quite often because the signatures contain logos about current events). We currently use a script to copy the signatures from the share to the local disk when users login. Question: How to set Outlook 2010 to use signatures outside of the default signature folder ?

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• parallel_for_each from amp.h – part 1

  - by Daniel Moth

  This posts assumes that you've read my other C++ AMP posts on index<N> and extent<N>, as well as about the restrict modifier. It also assumes you are familiar with C++ lambdas (if not, follow my links to C++ documentation). Basic structure and parameters Now we are ready for part 1 of the description of the new overload for the concurrency::parallel_for_each function. The basic new parallel_for_each method signature returns void and accepts two parameters: a grid<N> (think of it as an alias to extent) a restrict(direct3d) lambda, whose signature is such that it returns void and accepts an index of the same rank as the grid So it looks something like this (with generous returns for more palatable formatting) assuming we are dealing with a 2-dimensional space: // some_code_A parallel_for_each( g, // g is of type grid<2> [ ](index<2> idx) restrict(direct3d) { // kernel code } ); // some_code_B The parallel_for_each will execute the body of the lambda (which must have the restrict modifier), on the GPU. We also call the lambda body the "kernel". The kernel will be executed multiple times, once per scheduled GPU thread. The only difference in each execution is the value of the index object (aka as the GPU thread ID in this context) that gets passed to your kernel code. The number of GPU threads (and the values of each index) is determined by the grid object you pass, as described next. You know that grid is simply a wrapper on extent. In this context, one way to think about it is that the extent generates a number of index objects. So for the example above, if your grid was setup by some_code_A as follows: extent<2> e(2,3); grid<2> g(e); ...then given that: e.size()==6, e[0]==2, and e[1]=3 ...the six index<2> objects it generates (and hence the values that your lambda would receive) are:    (0,0) (1,0) (0,1) (1,1) (0,2) (1,2) So what the above means is that the lambda body with the algorithm that you wrote will get executed 6 times and the index<2> object you receive each time will have one of the values just listed above (of course, each one will only appear once, the order is indeterminate, and they are likely to call your code at the same exact time). Obviously, in real GPU programming, you'd typically be scheduling thousands if not millions of threads, not just 6. If you've been following along you should be thinking: "that is all fine and makes sense, but what can I do in the kernel since I passed nothing else meaningful to it, and it is not returning any values out to me?" Passing data in and out It is a good question, and in data parallel algorithms indeed you typically want to pass some data in, perform some operation, and then typically return some results out. The way you pass data into the kernel, is by capturing variables in the lambda (again, if you are not familiar with them, follow the links about C++ lambdas), and the way you use data after the kernel is done executing is simply by using those same variables. In the example above, the lambda was written in a fairly useless way with an empty capture list: [ ](index<2> idx) restrict(direct3d), where the empty square brackets means that no variables were captured. If instead I write it like this [&](index<2> idx) restrict(direct3d), then all variables in the some_code_A region are made available to the lambda by reference, but as soon as I try to use any of those variables in the lambda, I will receive a compiler error. This has to do with one of the direct3d restrictions, where only one type can be capture by reference: objects of the new concurrency::array class that I'll introduce in the next post (suffice for now to think of it as a container of data). If I write the lambda line like this [=](index<2> idx) restrict(direct3d), all variables in the some_code_A region are made available to the lambda by value. This works for some types (e.g. an integer), but not for all, as per the restrictions for direct3d. In particular, no useful data classes work except for one new type we introduce with C++ AMP: objects of the new concurrency::array_view class, that I'll introduce in the post after next. Also note that if you capture some variable by value, you could use it as input to your algorithm, but you wouldn’t be able to observe changes to it after the parallel_for_each call (e.g. in some_code_B region since it was passed by value) – the exception to this rule is the array_view since (as we'll see in a future post) it is a wrapper for data, not a container. Finally, for completeness, you can write your lambda, e.g. like this [av, &ar](index<2> idx) restrict(direct3d) where av is a variable of type array_view and ar is a variable of type array - the point being you can be very specific about what variables you capture and how. So it looks like from a large data perspective you can only capture array and array_view objects in the lambda (that is how you pass data to your kernel) and then use the many threads that call your code (each with a unique index) to perform some operation. You can also capture some limited types by value, as input only. When the last thread completes execution of your lambda, the data in the array_view or array are ready to be used in the some_code_B region. We'll talk more about all this in future posts… (a)synchronous Please note that the parallel_for_each executes as if synchronous to the calling code, but in reality, it is asynchronous. I.e. once the parallel_for_each call is made and the kernel has been passed to the runtime, the some_code_B region continues to execute immediately by the CPU thread, while in parallel the kernel is executed by the GPU threads. However, if you try to access the (array or array_view) data that you captured in the lambda in the some_code_B region, your code will block until the results become available. Hence the correct statement: the parallel_for_each is as-if synchronous in terms of visible side-effects, but asynchronous in reality.   That's all for now, we'll revisit the parallel_for_each description, once we introduce properly array and array_view – coming next. Comments about this post by Daniel Moth welcome at the original blog.

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• Windows Server 2003 - passwordless access to \\myhost\ but not \\myhost.mydomain.net\

  - by Charles Duffy

  I have a Windows Server 2003 system on which passwordless access to local UNC paths is possible using the server's unqualified hostname or its IP address, but not via its FQDN -- even when the hosts file is used to map that FQDN directly to 127.0.0.1. That is: \\127.0.0.1\ - passwordless \\myhost\ - passwordless \\myhost.mydomain.com\ - brings up an authentication dialog Unfortunately, I have a local application trying to resolve UNC paths including the host's FQDN. I've tried resolving myhost.mydomain.com to 127.0.0.1 in both hosts and lmhosts, and calling ping myhost.mydomain.com at the command prompt gives the appearance that this resolution has taken effect; even so, attempting to open \\myhost.mydomain.com\ from Windows Explorer brings up a password prompt, while \\127.0.0.1\ does not. The system is using an OpenDirectory server (Apple's Kerberos+LDAP directory service) for authentication.

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• How to install Ubuntu 12.04.1 in EFI mode with Encrypted LVM?

  - by g0lem

  I'm trying to properly install Ubuntu 12.04.1 LTS 64-bit PC (AMD64) with the alternate install CD ".iso" on a lenovo Thinkpad X220. Default Hard Disk (with a pre-installed version of Windows 7) has been replaced with a brand new SSD. The UEFI BIOS of the lenovo Thinkpad X220 is set to "UEFI Boot only" & "USB UEFI BIOS Support" is enabled (I'm using an external USB DVD reader to perform Ubuntu installation). The BIOS is a Phoenix SecureCore Tiano, BIOS version is 8DET56WW (1.26). The attempts below are made with the UEFI BIOS settings described above. Here's what I've tried so far: Boot on a live GParted CD Create a GPT partition table Create a FAT32 partition for UEFI System, set the partition to "EF00" type ("boot" flag) Leave remaining space unformated Boot on Ubuntu 12.04.1 LTS 64-bit PC (AMD64) with alternate CD: Perform the install with network updates enabled Use manual partitioning FAT32 partition created with GParted is used as "EFI System partition" Remaining space is set to be used as "Physical volume for LVM" Then "Configure encrypted volumes" using the previous "Physical volume for LVM" as the encrypted container, passphrase is setup. "Configure the Logical Volume Manager" creating a volume Group using the encrypted container /dev/mapper/sda2_crypt Creation of the Logical Volumes "Create logical volume", choosing the previously created volume Group Assign a mount point and file system to the Logical volumes : LV-root for / LV-var for /var LV-usr for /usr LV-usr-local for /usr/local LV-swap for swap LV-home for /home NOTE: /tmp would be in RAM only using TMPFS Bootloader step: neither my ESP partition (/dev/sda1, /dev/sda or MBR) seems to be the right place for GRUB, I get the following message (X suffix is for demonstration only): unable to install grub in /dev/sdaX Executing 'grub-install /dev/sdaX' failed This is a fatal error. Finish installation without the Bootloader & Reboot The system doesn't start, there's no EFI/GRUB menu at startup. What are the steps to perform a clean and working installation of Ubuntu 12.04.1 Precise Pangolin, 64bit version in U(EFI) mode using the encrypted LUKS + LVM scheme described above?

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• Problems installing icinga-web

  - by Kungurov

  I'm using Ubuntu 10.04 LTS (64bit, Server), Apache 2.2.14 Following the instruction from the oficial icinga page http://docs.icinga.org/latest/en/index.html I installed the icinga-web-1.7.1 on my machine and configured a few hosts for test purposes. The Classic Interface runs as expected but the new Web Interface does not show any data. When I try: ps aux | grep ido2db | grep -v grep I get: icinga 27425 0.0 0.0 41464 600 ? Ss Jul27 0:00 /usr/local/icinga/bin/ido2db -c /usr/local/icinga/etc/ido2db.cfg which might indicate a problem with idomod/ido2db because according to the docs there should be at least 2 processes greped. Any ideas how to fix that?

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• Effective handling of variables in non-object oriented programming

  - by srnka

  What is the best method to use and share variables between functions in non object-oriented program languages? Let's say that I use 10 parameters from DB, ID and 9 other values linked to it. I need to work with all 10 parameters in many functions. I can do it next ways: 1. call functions only with using ID and in every function get the other parameters from DB. Advantage: local variables are clear visible, there is only one input parameter to function Disadvantage: it's slow and there are the same rows for getting parameters in every function, which makes function longer and not so clear 2. call functions with all 10 parameters Advantage: working with local variables, clear function code Disadvantage: many input parameters, what is not nice 3. getting parameters as global variables once and using them everywhere Advantage - clearer code, shorter functions, faster processing Disadvantage - global variables - loosing control of them, possibility of unwanted overwriting (Especially when some functions should change their values) Maybe there is some another way how to implement this and make program cleaner and more effective. Can you say which way is the best for solving this issue?

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• Nivida driver install

  - by Adham

  tried black listing and every thing i could find on the internet used with root and alt+ctrl+f1 with no solution nvidia-installer log file '/var/log/nvidia-installer.log' creation time: Mon Jun 17 08:35:25 2013 installer version: 319.23 PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin nvidia-installer command line: ./nvidia-installer Using: nvidia-installer ncurses user interface -> License accepted. -> Installing NVIDIA driver version 319.23. -> Running distribution scripts executing: '/usr/lib/nvidia/pre-install'... -> done. -> The distribution-provided pre-install script failed! Continue installation anyway? (Answer: Yes) ERROR: The Nouveau kernel driver is currently in use by your system. This driver is incompatible with the NVIDIA driver, and must be disabled before proceeding. Please consult the NVIDIA driver README and your Linux distribution's documentation for details on how to correctly disable the Nouveau kernel driver. WARNING: One or more modprobe configuration files to disable Nouveau are already present at: /etc/modprobe.d/nvidia-installer-disable-nouveau.conf. Please be sure you have rebooted your system since these files were written. If you have rebooted, then Nouveau may be enabled for other reasons, such as being included in the system initial ramdisk or in your X configuration file. Please consult the NVIDIA driver README and your Linux distribution's documentation for details on how to correctly disable the Nouveau kernel driver. ERROR: Installation has failed. Please see the file '/var/log/nvidia-installer.log' for details. You may find suggestions on fixing installation problems in the README available on the Linux driver download page at www.nvidia.com.

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• IIS cannot access itself

  - by dave

  We are on a corporate network that uses ISA and I am having issues trying to not have requests go through ISA. I have IIS7 on my local Windows 7 machine that has websites and a service layer. The websites access the service layer using a xxxx.servicelayer.local address that is set up in my HOSTS file to point to 127.0.0.1. I have Windows Firewall client which I have disabled. I have tried both adding this address into IE so that it does not go through ISA and also disabled this section altogether. When the website (which is actually IIS making the request to itself) tries to access the service layer I receive an ISA error that proxy authentication has failed. Considering that everything I can see to configure is set to not go through the proxy, ISA, I cannot see how this is actually going through the proxy and giving this error. Is there something within Windows 7 that forces the proxy setting, some sort of caching or similar?

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• MLGPO for Windows Server 2003 R2?

  - by 5graeham5

  Is there something like MLGPO (Multiple Local Group Policy Objects) for Windows Server 2003 R2? I have a 2003 Terminal Server that isn't part of a domain/AD and I'm trying to set local group policies which applies only to certain users and/or groups and the policies differ between those entities. I wanted to avoid using the file permissions trick for on C:\WINDOWS\system32\GroupPolicy as that's an all-or-nothing approach. I can't upgrade this box to Windows Server 2008 as the software used is only supported and only works on 2003. Are there any third-party tools to achieve this?

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• Google Analytics: Block Your Dynamic IP Visits?

  - by 4thSpace

  I have a dynamic IP, which doesn't work for Google Analytics IP filtering. I read this post How to excludes my visits from Google Analytics? but don't see any code for setting the variable mentioned there. Has anyone been able to block their website visits from Google Analytics using a cookie? EDIT: This seems to work https://tools.google.com/dlpage/gaoptout. Although I don't think it was designed as I'm using it.

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