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  • Reading input all together or in steps?

    - by nischayn22
    For many programming quizzes we are given a bunch of input lines and we have to process each input , do some computation and output the result. My question is what is the best way to optimize the runtime of the solution ? Read all input, store it (in array or something) ,compute result for all of them, finally output it all together. or 2. Read one input, compute the result, output the result and so on for each input given.

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  • afp/smb transfers caps at 2 megabytes/sec, wireless N

    - by RD.
    I wanted to transfer files between two mac computers. The network is wireless-N and both computers have wireless-N modules in them. The problem is that when I transfer files between them, via file sharing (afp) the network speed caps at 2 megabytes/sec. Just downloading files from the internet I can get faster speeds, so this isn't a constriction of my wifi bandwidth, it appears to be a constriction of the protocol being used. My wifi-n is set to 130mbits, so I should see real world transfer speeds around 12-16 megabytes/sec I did this command on both computers sudo sysctl -w net.inet.tcp.delayed_ack=0 which is supposed to lower tcp overhead, but this did not affect it. How can I get the speed I am expecting?

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  • Adding a W2008 Authenticating Server to existing W2003 Domain?

    - by spelk
    I have an existing W2003 Domain, simple setup with one DC and a SQL Server (approx 100 users). There are issues with Windows 7 Clients and login scripts and we're now seeing much greater numbers of Windows 7 users turning up as they upgrade their PC/Laptops. What I want to do, is add another Server with W2008 on it, and authenticate the Windows 7 Clients - but leave the W2003 server running as is - to prevent disruption to the network and the existing WinXP users. Is it possible? Any advice as to how do this, without major disruption to the W2003 network?

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  • Linking two networks that have a common device

    - by Serban Razvan
    I recently bought a Samsung Smart TV having in mind to connect it to the Internet. Because my router is very far from it and not wanting to buy an expensive wireless for the TV, I created a homemade solution. I have the laptop (an smartphone and the PC) connected to the router which is connected to the internet. I shared the laptop's wireless connection to the ethernet port which I connected to the TV. So far, the TV is connected to the internet, but is there any way to make him part of the router's network instead of the 2 devices network (the laptop and the TV)?

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  • Error when I try to connect to a SQL Server 2005 from the internet

    - by Manish
    My SQL Server is on a local machine. I want to access it through internet. I created a website through I want to connect local SQL Server 2005. This is the error message: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) Thanks for a reply!

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  • Does searching documentation and samples look bad?

    - by Mick Aranha
    I am starting a new job in a company with many developers and media people, the layout of the place is open with computers around a skinny oval, I have worked in small teams and programming embedded C, the jobis for objective C I'm still in a medium stage, so I know what I don't know (haha), that means I have to google it and then implement it, So the question is how bad does it look if the guy next to you does lot of searching for coding I mean, at the end of the day I will get the job done, but want to look professional too!

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  • Opening Word documents from IE LAG Windows 7 IE8

    - by Steve McCall
    Hi, I'm having a lot of trouble opening documents from a network share in word using IE. The documents are located in a network share which is mapped to a virtual directory. The documents are accessed by URLs that link to the virtual directory. There is now a huge lag (sometimes up to a minute or two!) from when clicking on the link to the document opening in word. The 'loading disc' in IE just keeps spinning and nothing happens. Sometimes a pop up box appears with 'opening file - (address)' but it still takes ages. I've tried setting in the registry to open the files directly in ie but to no avail. Anyone have any ideas? Steve

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  • ubuntu 12.10 Lenovo b570e, WiFi connected but not working

    - by koogee
    I'm running ubuntu 12.10 liveUSB on a lenovo b570e. It has an atheros wifi card that connects with my home network but I can't browse AT ALL. My network is multiple clients --> router --> isp modem --> Internet I can ping my router (192.168.0.1) but not my isp's modem(192.168.15.1). I have 3 other computers connected to the same router that are working fine (infact i'm posting from one) ping -c 3 google.com unknown host google.com ping -c 3 8.8.8.8 shows 100% packet loss I think its some networking issue. I tried directly connecting it to the router via ethernet cable but same issue. It gets an ip, shows LAN connected but can't browse. If I connect it directly to the isp modem via ethernet cable it starts working fine. Connection Information shows: Interface: 802.11 wifi (wlan0) driver: ath9k security: wpa/wpa2 speed: 150mb/s ip: 192.168.0.106 broadcast: 192.168.0.255 subnet:255.255.255.0 default route: 192.168.0.1 primary dns: 192.168.15.1 i have restarted the router and modem many times. Rebooted the LiveUSB many times.

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  • Should I use OpenGL while working with the C++ Software?

    - by Paralytic
    I am completely new to programming and game development for that matter. I am using the C++ software to create my Game Engine with the help of a beginners guide. I noticed it has a OpenGL option when starting up a new project. I've heard of OpenGL pertaining to game development, not sure what it is though. Should I be using OpenGL when creating my Game Engine? Will it matter if I just start with a blank slate?

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  • Virtual Windows Servers and Pagefile location [closed]

    - by Luke Puplett
    Considering that Windows makes heavy use of the pagefile even with huge amounts of RAM available, is it not best to have this pagefile on the fastest disk possible as close to the virtual systems as possible? I'm thinking, RAM disk. Where I work, storage for VMs is out on a NAS/SAN. I'm worried that so much memory access is having to go across the network! As a side, I think its about time MS got rid of paging and told us to buy more DIMMS. UPDATE So this question has been downvoted??! Accessing a local spindle is C40,000 times slower than a DIMM, so going over the network will be even slower for hard faults. I don't know why I got the downvote, I'm certain that this is an issue unless there's some other mechanism in ESX/HyperV that manages this.

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  • Why Keep These 10 A Penny " How Long Will It Take To Program in Blah Blah Blah Language Questions" Open Yet Close This Question..? [migrated]

    - by user866190
    Why keep this question open and others like it open which basically asks how long does it take to learn a programming language? Yet I ask a valid question which basically asks how esteemed is a mathematics degree from the UK open university and would software employers hire whilst you are the course.. and it gets closed I love the advice I get from this site and I appreciate the fact that Software Technicians of all types use this site, but it's a bit shallow if you can't ask a question with a little bit of the real world involved

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  • Set-based Speed Phreakery: The FIFO Stock Inventory SQL Problem

    The SQL Speed Freak Challenge is a no-holds-barred competition to find the fastest way in SQL Server to perform a real-life database task. It is the programming equivalent of drag racing, but without the commentary box. Kathi has stepped in to explain what happened with the second challenge and why some SQL ran faster than others.

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  • How to route local traffic over switch?

    - by Franz Kafka
    I'm just cabled up at home but haven't got any way of verifying that gigabit speed can be reached. As I've only got one laptop with one network card, one cable, and one switch, I'm kind of stuck. I'm using a tool that you can start as a server or as a client to send data from one box to another. I would like to send and receive on the same Windows box. I guess if I use my network local IP address, my Windows 8.1 PC will just route traffic internally. Is there some way of forcing the traffic to go to the switch and back again?

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  • Why my webservice not live on internet? [closed]

    - by blankon91
    I've windows server that goes live on internet, (e.g. www.mysite.com). Then I want to create another site with different port (e.g. www.mysite.com:502). I've create that and it works when I access it on local network, but when I access it from outside of local network (internet) the www.mysite.com:502 can't accessed but the www.mysite.com can accessed. what should I do to make www.mysite.com:502 goes online? I use windows server 2008 standard

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  • Can I mix CAT5 and CAT6?

    - by Jason94
    I'm thinking of upgrading the "backbone" of my network, taking a CAT6 cable from my router (DLINK DIR-655 (has cat6 ports)) to a gigabit swith in the tv rom (25m). I have two devices there that uses network (xbox and tvbox, both of them have cat5). Will my net be downgraded to 100mbit as max speed, or will I get 1 gigabit between my router and switch, and 100mbit between tvbox and xbox? From back in the days i have a tool to create my cat5 cable (the plug tool thingy), can I use this for my cat6 too?

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  • Set up an Email server on intranet without domain

    - by Devdatta Tengshe
    I work in a small office with about 35 people and we are all on a intranet. This network is not connected to the internet. Is it possible to set up an email server, with which we could send emails to each other? (We don't need to send emails outside our network.) I cannot use a messenger service like Openfire, since the messages could be asynchronous, and we'd like to get those emails in a email client like Thunderbird. Another obstacle we have is that we do not have a domain name. Any ideas on which free (as in beer) software could be used? We have both Windows and Linux machines.

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  • Are there any good books on how to design software?

    - by nc01
    I've been programming for a while and I think I write clean code. But I do this by hacking away, tinkering and testing things until I feel good about the functionality, and then coming in and refactoring, refactoring, refactoring. I tend to write mostly in PHP, Java, and C. Are there any good books that will help me learn to visualize things better and not code everything as if in an infinite REPL loop? Thanks.

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  • Whats a good host for an active vBulletin site?

    - by Kyle
    I've been switching hosts using a VPS each time and I'm just really not sure I'm finding the right VPS's. I've used a VPS from burst.net & rubyringtech and I just feel like it's slowly killing my site because of the slow speed. I really don't know if it's the network or the VPS itself but I really wish to fix this. When I TOP into the VPS peak times it shows this: top - 03:18:56 up 16:33, 1 user, load average: 1.33, 1.40, 1.33 Tasks: 30 total, 1 running, 29 sleeping, 0 stopped, 0 zombie Cpu(s): 27.2%us, 13.6%sy, 0.0%ni, 59.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1048576k total, 679712k used, 368864k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached And pages take atleast a good 2-3 minutes to load. I have only like 50-60 members on the forum also. I had a shared hosting account and the forum was lightning fast.... Is a VPS a bad idea? :\ What should I do to fix this? I'm running lighttpd with xcache, and the latest mysql + php version. The server is a intel i7 2600 w/ 1gb uplink (I think the 1gb uplink is a lie because I've tested the network and the highest download speed I've seen was 20mb/s from a code.google page) All in all I've seen people talking about linode. Should I try them? I honestly don't need a dedicated server yet it's only 50-70 members online. What should I do? I really want a VPS because I enjoy root access. Does anyone have any suggestions?

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  • Why does the Mac OS X (10.6) Finder stop being able to connect to Windows computers?

    - by Drarok
    We have one Mac (a MacBook Pro Unibody) amongst our Windows machines which connects to the "server" (actually a Dell running Windows XP Pro) to access documents. This works just fine most of the time, but sometimes after waking from sleep, it cannot connect to any Windows computer on the network. There are no errors (nor even any messages) in the Console application when attempting to connect either by the Finder's network browsing, nor when using the "Connect To Server" menu. I have tried "Relaunch" on Finder, toggled File Sharing, disabled and re-enabled the Airport, but nothing makes the Mac able to connect again until I reboot it! Other computers can connect to the machines, so it is definitely the Mac at fault. Are there any workarounds that anyone has found? Is there perhaps a way to re-start the samba client?

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  • Replicate portion of an LDAP directory to external server

    - by colemanm
    We're in the process of setting up a Jabber server on Amazon EC2 right now, and we'd like to have our internal users authenticate via LDAP so we don't have to create/manage a separate set of user accounts than the master directory in the office. My question is: is there a way to copy, unidirectionally, a segment of our internal LDAP directory (the user accounts OU) to an external LDAP server and authenticate Jabber against that? We're trying to work around having our externally hosted machines out in the cloud accessing our internal network directly... If we can replicate in one direction only a subset of the user accounts, then if that gets compromised we don't necessarily have a critical security breach into our internal network.

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  • How do I bridge a connection from Wi-Fi to TAP on Mac OS X? (for the emulator QEMU)

    - by penx
    I'm trying to setup a bridge between my Wi-Fi connection and an emulator (QEMU). I need a virtual machine to be on the same LAN as the host, with its own IP address. QEMU requires using a TAP (virtual network device) so I have installed tuntaposx, have it running, and can open up QEMU using a TAP: qemu-system-arm -kernel zImage.integrator -initrd arm_root.img -m 256 -net nic -net tap,ifname=tap1 -nographic -append "console=ttyAMA0" I have a script that configures the bridge once QEMU has opened up the TAP interface: sysctl -w net.link.ether.inet.proxyall=1 sysctl -w net.inet.ip.forwarding=1 sysctl -w net.inet.ip.fw.enable=1 ifconfig bridge0 create ifconfig bridge0 addm en1 ifconfig tap1 0.0.0.0 up ifconfig bridge0 addm tap1 ifconfig bridge0 up If I manually set an IP on the VM, I can ping from the VM to the host, but not from the host to the VM. Also, I can't access the rest of the network from the VM - including not being able to set an IP over DHCP. Any ideas?

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  • How do you check out what's hot in the open source space?

    - by Fanatic23
    I am trying to look for resources (sites, magazines, blogs, twitter etc) that track what's hot and happening in the open source space. This is programming language agnostic, I am more interested in knowing what kind of cool apps people are coming up these days particularly in the enterprise and scientific computing space. I am also into compilers, debuggers and other low level stuff. Any help appreciated.

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  • Google Chrome giving error 138

    - by gsingh2011
    Google Chrome randomly stopped working one day and is giving me this error: Google Chrome is having trouble accessing the network. This may be because your firewall or antivirus software wrongly thinks that Google Chrome is an intruder on your computer and is blocking it from connecting to the Internet. Here are some suggestions: Add Google Chrome as a permitted programme in your firewall or antivirus software's settings. If it is already a permitted programme, try deleting it from the list of permitted programmes and adding it again. Error 138 (net::ERR_NETWORK_ACCESS_DENIED): Unable to access the network. I didn't make any changes to my firewall settings between the time it was working and when it wasn't working. I'm using the default Windows Firewall. I added Chrome to the allowed programs and restarted, but that didn't fix the error. I even reinstalled Chrome completely and that didn't work either. Any help would be appreciated. EDIT: I forgot to mention that Firefox and IE9 work fine.

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  • What is the best way to setup a heartbeat agent for failover between two VMs?

    - by EGr
    I have two VMs in VirtualBox that use NAT for their network adapters. They are both getting the same IP address, so I will need to reconfigure that; but knowing that, is it possible to set up a heartbeat agent to failover an apache server if one of the two VMs go down? The way I pictured it would be that the webserver would be able to be accessed externally via :80. No matter what VM was running, I would be able to access the website at that IP/port since failover would be setup. I'm running into trouble setting up IPs when the network adapters are set to NAT, and people have told me that I shouldn't be setting the IPs in this configuration. So what should I do to achieve what I'm looking for? Is it even feasible?

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