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  • How do you backup 40+ Centos5.5 servers?

    - by John Little
    We are embarrassed to ask this question. Apologies for our lack of UNIX expertise. We have inherited 40+ centos 5.5 servers, and don't know how to back them up. We need low level clone type images so that we could restore the servers from scratch if we had to replace the HDs etc. We have used the "dd" command, but we assume this only works if you want to back up one local disk to another, not 40 servers to one server with an external USB HD attached. All 40 servers have a pair of mirrored disks (dont know if its HW or SW raid). Most only have 100MB used. SErvers are running apache, zend, tomcat, mysql etc. Ideally we dont want to have to shut them down to backup (but could). We assume that standard unix commands like tar, cpio, rsync, scp etc. are of no use as they only copy files, not partitions, all attributes, groups etc. i.e. do not produce a result which can simply be re-imaged to a new HD to get the serer back from dead. We have a large SAN, a spare windows box and spare unix boxes, but these are only visible to one layer in the network. We have an unused Dell DL2000 monster tape unit, but no sw or documentation for it. WE have a copy of symantec backup exec, but we have no budget for unix client licenses. (The company has negative amounts of money). We need to be able to initiate the backup remotely, as we can only access the servers in person in an emergency (i.e. to restore) Googling returns some applications to do this, e.g. clonezilla - looks difficult to install and invasive. Mondo, only seems to support backup if you are local to the machine. Amanda might be an option, but looks like days/weeks of work to learn and setup? Is there anything built into Centos, or do we have to go the route of installing, learning and configuring a set of backup softwares? Any ideas? This must be a pretty standard problem which goggling doesnt give an obvious answer.

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  • WCF REST POST error bad request 400

    - by lyatcomit
    Here's my code: DOAMIN: using System; using System.Collections; using System.Runtime.Serialization; namespace Comit.TrafficService.Services.Mobile { [DataContract(Namespace = "http://192.168.0.161:9999/TrafficService/Domain/Mobile")] public class Error { [DataMember] public int Id { get; set; } [DataMember] public DateTime Time { get; set; } public string Message { get; set; } [DataMember] public string Stacktrace { get; set; } [DataMember] public string Os { get; set; } [DataMember] public string Resolution { get; set; } } } CONTRACT: using System.ServiceModel; using System.ServiceModel.Web; using Comit.TrafficService.Services.Mobile; namespace Comit.TrafficService.Services.Contracts { [ServiceContract(Name = "MobileErrorService")] public interface IMobileError { /// <summary> /// ??????????? /// </summary> /// <param name="Error">??????</param> /// <returns></returns> [OperationContract] [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedResponse, UriTemplate = "ErrorReport", RequestFormat = WebMessageFormat.Xml, ResponseFormat = WebMessageFormat.Xml) ] int ErrorReport(Error error); } } SERVICE: using System.ServiceModel.Web; using Comit.TrafficService.Services.Contracts; using Comit.TrafficService.Dao.Mobile; using System; using Comit.TrafficService.Services.Mobile; namespace Comit.TrafficService.Services { public class MobileErrorService : IMobileError { public int ErrorReport(Error error) { return HandleAdd(error); } public int HandleAdd(Error error) { Console.WriteLine("?????error.Message:" + error.Message); ErrorDao edao = new ErrorDao(); Console.WriteLine("??error" ); int result = (int)edao.Add(error); return result; } } } Configuration: <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <services> <service name="Comit.TrafficService.Services.MobileErrorService"> <host> <baseAddresses> <add baseAddress="http://192.168.0.161:9999"/> </baseAddresses> </host> <endpoint address="http://192.168.0.161:9999/Comit/TrafficService/Services" binding="webHttpBinding" contract="Comit.TrafficService.Services.Contracts.IMobileError" behaviorConfiguration="RestfulBehavior" name="webHttpBinding"> </endpoint> </service> </services> <behaviors> <endpointBehaviors> <behavior name="RestfulBehavior"> <webHttp/> <dataContractSerializer ignoreExtensionDataObject="true"/> </behavior> </endpointBehaviors> </behaviors> </system.serviceModel> </configuration> Host: using System; using System.Collections.Generic; using System.Linq; using System.ServiceModel; using System.Text; using Comit.TrafficService.Services; namespace ServiceTest { class Program { static void Main(string[] args) { using (ServiceHost host = new ServiceHost(typeof(MobileErrorService))) { host.Opened += delegate { Console.WriteLine("CalculaorService????,????????!"); }; host.Open(); Console.Read(); } } } } Client code: using System; using System.ServiceModel; using System.ServiceModel.Description; using TestWCFRest.WcfServices.Services; using System.Net; namespace TestWCFRest.WcfServices.Hosting { class Program { static void Main(string[] args) { //using (ServiceHost host = new ServiceHost(typeof(CalculatorService))) //{ // host.Opened += delegate // { // Console.WriteLine("CalculaorService????,????????!"); // }; // host.Open(); // Console.Read(); //} HttpWebRequest req = null; HttpWebResponse res = null; try { string url = "http://192.168.0.161:9999/Comit/TrafficService/Services/ErrorReport"; req = (HttpWebRequest)WebRequest.Create(url); req.Method = "POST"; req.ContentType = "application/xml; charset=utf-8"; req.Timeout = 30000; req.Headers.Add("SOAPAction", url); System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument(); xmlDoc.XmlResolver = null; xmlDoc.Load(@"d:\test.xml"); string sXML = xmlDoc.InnerXml; req.ContentLength = sXML.Length; System.IO.StreamWriter sw = new System.IO.StreamWriter(req.GetRequestStream()); sw.Write(sXML); sw.Close(); res = (HttpWebResponse)req.GetResponse(); } catch (Exception ex) { System.Console.WriteLine(ex.Message); } } } } It's my first time I'm trying to do somethinf with WCF so I don't know how to solve this problem. Since there is a lot of professionals here, I would appreciate your help in solving this. Thank you in advance!

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  • Why is insertion into my tree faster on sorted input than random input?

    - by Juliet
    Now I've always heard binary search trees are faster to build from randomly selected data than ordered data, simply because ordered data requires explicit rebalancing to keep the tree height at a minimum. Recently I implemented an immutable treap, a special kind of binary search tree which uses randomization to keep itself relatively balanced. In contrast to what I expected, I found I can consistently build a treap about 2x faster and generally better balanced from ordered data than unordered data -- and I have no idea why. Here's my treap implementation: http://pastebin.com/VAfSJRwZ And here's a test program: using System; using System.Collections.Generic; using System.Linq; using System.Diagnostics; namespace ConsoleApplication1 { class Program { static Random rnd = new Random(); const int ITERATION_COUNT = 20; static void Main(string[] args) { List<double> rndTimes = new List<double>(); List<double> orderedTimes = new List<double>(); rndTimes.Add(TimeIt(50, RandomInsert)); rndTimes.Add(TimeIt(100, RandomInsert)); rndTimes.Add(TimeIt(200, RandomInsert)); rndTimes.Add(TimeIt(400, RandomInsert)); rndTimes.Add(TimeIt(800, RandomInsert)); rndTimes.Add(TimeIt(1000, RandomInsert)); rndTimes.Add(TimeIt(2000, RandomInsert)); rndTimes.Add(TimeIt(4000, RandomInsert)); rndTimes.Add(TimeIt(8000, RandomInsert)); rndTimes.Add(TimeIt(16000, RandomInsert)); rndTimes.Add(TimeIt(32000, RandomInsert)); rndTimes.Add(TimeIt(64000, RandomInsert)); rndTimes.Add(TimeIt(128000, RandomInsert)); string rndTimesAsString = string.Join("\n", rndTimes.Select(x => x.ToString()).ToArray()); orderedTimes.Add(TimeIt(50, OrderedInsert)); orderedTimes.Add(TimeIt(100, OrderedInsert)); orderedTimes.Add(TimeIt(200, OrderedInsert)); orderedTimes.Add(TimeIt(400, OrderedInsert)); orderedTimes.Add(TimeIt(800, OrderedInsert)); orderedTimes.Add(TimeIt(1000, OrderedInsert)); orderedTimes.Add(TimeIt(2000, OrderedInsert)); orderedTimes.Add(TimeIt(4000, OrderedInsert)); orderedTimes.Add(TimeIt(8000, OrderedInsert)); orderedTimes.Add(TimeIt(16000, OrderedInsert)); orderedTimes.Add(TimeIt(32000, OrderedInsert)); orderedTimes.Add(TimeIt(64000, OrderedInsert)); orderedTimes.Add(TimeIt(128000, OrderedInsert)); string orderedTimesAsString = string.Join("\n", orderedTimes.Select(x => x.ToString()).ToArray()); Console.WriteLine("Done"); } static double TimeIt(int insertCount, Action<int> f) { Console.WriteLine("TimeIt({0}, {1})", insertCount, f.Method.Name); List<double> times = new List<double>(); for (int i = 0; i < ITERATION_COUNT; i++) { Stopwatch sw = Stopwatch.StartNew(); f(insertCount); sw.Stop(); times.Add(sw.Elapsed.TotalMilliseconds); } return times.Average(); } static void RandomInsert(int insertCount) { Treap<double> tree = new Treap<double>((x, y) => x.CompareTo(y)); for (int i = 0; i < insertCount; i++) { tree = tree.Insert(rnd.NextDouble()); } } static void OrderedInsert(int insertCount) { Treap<double> tree = new Treap<double>((x, y) => x.CompareTo(y)); for(int i = 0; i < insertCount; i++) { tree = tree.Insert(i + rnd.NextDouble()); } } } } And here's a chart comparing random and ordered insertion times in milliseconds: Insertions Random Ordered RandomTime / OrderedTime 50 1.031665 0.261585 3.94 100 0.544345 1.377155 0.4 200 1.268320 0.734570 1.73 400 2.765555 1.639150 1.69 800 6.089700 3.558350 1.71 1000 7.855150 4.704190 1.67 2000 17.852000 12.554065 1.42 4000 40.157340 22.474445 1.79 8000 88.375430 48.364265 1.83 16000 197.524000 109.082200 1.81 32000 459.277050 238.154405 1.93 64000 1055.508875 512.020310 2.06 128000 2481.694230 1107.980425 2.24 I don't see anything in the code which makes ordered input asymptotically faster than unordered input, so I'm at a loss to explain the difference. Why is it so much faster to build a treap from ordered input than random input?

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  • Can GMod/SFM models be converted to Unity GameObjects?

    - by Supuhstar
    Someone made a suite of GMod/SFM models available for free for people making games and videos in GMod and SFM. These are of type .dmx, .dx80.vtx, .dx90.vtx, .mdl, .phy, .sw.vtx, .vvd, .vmt, and .vtf. I fon't use GMod or SFM, so I don't know what these are, thus making it hard for me to manually convert them. Is there any way to change these into files Unity can recognize and use? I'd like to have an easy step from converting them, but I would also accept instructions on how to export them to generic mesh/skeleton/texture files, and then how to import and combine these in Unity.

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  • Oracle Desktop Virtualization Press Release

    - by [email protected]
    Even though Oracle has introduced new products (HW and SW) and pricing, and part numbers, modified licensing, and an EVP and an SVP have discussed openly where Oracle is going with Virtualization,  you may still have heard from "the other guys' that Oracle isn't going to be keeping the legacy Sun 'Desktop' portfolio.  I think that has soundly been addressed by the press release this morning.  Click here for the release.This is a great way to kick off Oracle's New (fiscal) Year.  As there are more announcements coming - I'll just say "Enjoy!, and "Stay Tuned".

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  • FGLRX does not have /usr/lib/libGL.so lib

    - by Paulo Lopes
    I am trying to compile some OpenGL apps from sources but there is no /usr/lib/libGL.so, or /usr/lib/libGL.so.1 or even /usr/lib/libGL.so.1.2. However fglrxinfo says: display: :0.0 screen: 0 OpenGL vendor string: ATI Technologies Inc. OpenGL renderer string: ATI Mobility Radeon HD 4500 Series OpenGL version string: 3.3.10237 Compatibility Profile Context Which is what i espect and the gears demo also works... How do i get those files? I tried the MESA files and then i got SW rendering which is not what i want...

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  • How can I prevent ubuntu from mounting particular partitions/deivices?

    - by Patryk
    I would like to stop Ubuntu from mounting my other (Windows') partitions automatically (since I do not need it really often - and especially I would like not to automount "System reserved" partition for Windows. There is a similar question here How can I stop Ubuntu 12.04 from mounting Fedora 16's Swap Partition? but! I do not have these partitions added in /etc/fstab. How can I do it ? For proof, my /etc/fstab proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda7 during installation UUID=1384cee0-6a71-4b83-b0d3-1338db925168 / ext4 errors=remount-ro 0 1 # swap was on /dev/sda6 during installation UUID=e3729117-b936-4c1d-9883-aee73dab6729 none swap sw 0 0 #------ MY WINDOWS D DRIVE---------- I WANT TO KEP IT UUID=98E8B14DE8B12A80 /media/d ntfs defaults,errors=remount-ro 0 0

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  • Finding shortest path on a hexagonal grid

    - by Timothy Mayes
    I'm writing a turn based game that has some simulation elements. One task i'm hung up on currently is with path finding. What I want to do is, each turn, move an ai adventurer one tile closer to his target using his current x,y and his target x,y. In trying to figure this out myself I can determine 4 directions no problem by using dx = currentX - targetY dy = currentY - targetY but I'm not sure how to determine which of the 6 directions is actually the "best" or "shortest" route. For example the way its setup currently I use East, West, NE, NW, SE, SW but to get to the NE tile i move East then NW instead of just moving NW. I hope this wasn't all rambling. Even just a link or two to get me started would be nice. Most of the info i've found is on drawing the grids and groking the wierd coordinate system needed. Thanks in advance Tim

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  • Transfer domains without disrupting local email server

    - by krosiris
    Perhaps I am thinking about this wrong, but maybe some of you guys can help me on this one. I have a client who currently has a domain from network solutions and is hosted via GoDaddy. Additionally, he his has email service with GoDaddy as well, but it seems to be forwarded to his local server at work. How can I transfer hosting accounts without disrupting email service (or at least temporarily)? Some MX info via Godaddy: A @ Points to GoDaddy Host main Points to client's home server sw Points to client's home server MX @ Points to main.example.com @ Points to smtp.secureserver @ Points to mailstore1.secureserver

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  • mips number of clock cycles and how improving code

    - by Hooman
    I'm really new in MIPS and I have these questions which I found so many dissimil answers for them ... if someone can help, it would be great. Thanks How many clock cycles does this code take? #Macro Instructions li $t0, 32 # 1 or 2 cycles ? # lui $at, Upper 16-bits of value # ori Rd, $at, Lower 16-bits of value # ----------------------------------- # ori Rt, $0, value # # Which set of instructions will be executed? div $t2, $t2, $t0 # 41 cycles? # bne Rt, $0, # break $0 # ok: div Rs, Rt # mflo Rd #Integer Instruction lw $t2, 0($t13) # 1 cycles? sw $t2, 0($t3) # 1 cycles? How those 4 lines of codes can be significantly improved? by avoiding to use Macros or ... ?

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  • Swap partition not recognized (The disk drive with UUID=... is not ready yet or not present)

    - by ladaghini
    I think I had an encrypted swap partition, because I chose to encrypt my home directory during the installation. I believe that's what the line with /dev/mapper/cryptswap1 ... in my /etc/fstab is all about. I did something to bork my swap because on the next boot, I got a message (paraphrased): The disk drive for /dev/mapper/cryptswap1 is not ready yet or not present. Wait to continue. Press S to skip or M to manually recover. (As a side note, pressing S or M seemed to do nothing different from just waiting.) Here's what I've tried: This tutorial on how to fix the swap partition not mounting. However, in the above, the mkswap command fails because the device is busy. So I booted from a live USB, ran GParted to reformat the swap partition (which showed up as an unknown fs type), and chrooted into the broken system to try that tutorial again. I also adjusted /etc/initramfs-tools/conf.d/resume and /etc/fstab to reflect the new UUID generated from formatting the partition as a swap. That still didn't work; instead of /dev/mapper/cryptswap1 not present, "The disk drive with UUID=[swap partition's UUID] is not ready yet or not present..." So I decided to start afresh as though I never had created a swap partition in the first place. From the Live USB, I deleted the swap partition altogether (which, again showed up in GParted as an unknown fs type), removed the swap and cryptswap entries in /etc/fstab as well as removed /etc/initramfs-tools/conf.d/resume and /etc/crypttab. At this point the main system shouldn't be considered broken because there is no swap partition and no instructions to mount one, right? I didn't get any errors during startup. I followed the same instructions to create and encrypt the swap partition, starting with creating a partition for the swap, though I think fdisk said a reboot was necessary to see changes. I was confident the 3rd process above would work, but the problem yet persists. Some relevant info (/dev/sda8 is the swap partition): /etc/fstab file: # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda6 during installation UUID=4c11e82c-5fe9-49d5-92d9-cdaa6865c991 / ext4 errors=remount-ro 0 1 # /boot was on /dev/sda5 during installation UUID=4031413e-e89f-49a9-b54c-e887286bb15e /boot ext4 defaults 0 2 # /home was on /dev/sda7 during installation UUID=d5bbfc6f-482a-464e-9f26-fd213230ae84 /home ext4 defaults 0 2 # swap was on /dev/sda8 during installation UUID=5da2c720-8787-4332-9317-7d96cf1e9b80 none swap sw 0 0 /dev/mapper/cryptswap1 none swap sw 0 0 output of sudo mount: /dev/sda6 on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) /dev/sda5 on /boot type ext4 (rw) /dev/sda7 on /home type ext4 (rw) /home/undisclosed/.Private on /home/undisclosed type ecryptfs (ecryptfs_check_dev_ruid,ecryptfs_cipher=aes,ecryptfs_key_bytes=16,ecryptfs_unlink_sigs,ecryptfs_sig=cbae1771abd34009,ecryptfs_fnek_sig=7cefe2f59aab8e58) gvfs-fuse-daemon on /home/undisclosed/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=undisclosed) output of sudo blkid (note that /dev/sda8 is missing): /dev/sda1: LABEL="SYSTEM" UUID="960490E80490CC9D" TYPE="ntfs" /dev/sda2: UUID="D4043140043126C0" TYPE="ntfs" /dev/sda3: LABEL="Shared" UUID="80F613E1F613D5EE" TYPE="ntfs" /dev/sda5: UUID="4031413e-e89f-49a9-b54c-e887286bb15e" TYPE="ext4" /dev/sda6: UUID="4c11e82c-5fe9-49d5-92d9-cdaa6865c991" TYPE="ext4" /dev/sda7: UUID="d5bbfc6f-482a-464e-9f26-fd213230ae84" TYPE="ext4" /dev/mapper/cryptswap1: UUID="41fa147a-3e2c-4e61-b29b-3f240fffbba0" TYPE="swap" output of sudo fdisk -l: Disk /dev/mapper/cryptswap1 doesn't contain a valid partition table Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xdec3fed2 Device Boot Start End Blocks Id System /dev/sda1 * 2048 409599 203776 7 HPFS/NTFS/exFAT /dev/sda2 409600 210135039 104862720 7 HPFS/NTFS/exFAT /dev/sda3 210135040 415422463 102643712 7 HPFS/NTFS/exFAT /dev/sda4 415424510 625141759 104858625 5 Extended /dev/sda5 415424512 415922175 248832 83 Linux /dev/sda6 415924224 515921919 49998848 83 Linux /dev/sda7 515923968 621389823 52732928 83 Linux /dev/sda8 621391872 625141759 1874944 82 Linux swap / Solaris Disk /dev/mapper/cryptswap1: 1919 MB, 1919942656 bytes 255 heads, 63 sectors/track, 233 cylinders, total 3749888 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xaf5321b5 /etc/initramfs-tools/conf.d/resume file: RESUME=UUID=5da2c720-8787-4332-9317-7d96cf1e9b80 /etc/crypttab file: cryptswap1 /dev/sda8 /dev/urandom swap,cipher=aes-cbc-essiv:sha256 output of sudo swapon -as: Filename Type Size Used Priority /dev/mapper/cryptswap1 partition 1874940 0 -1 output of sudo free -m: total used free shared buffers cached Mem: 1476 1296 179 0 35 671 -/+ buffers/cache: 590 886 Swap: 1830 0 1830 So, how can this be fixed?

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  • Verification of requirements question

    - by user970696
    Doing a lot of reading about V&V, I would need to clarify the following. A lot of definitons (less formal ones found in books) define verification like that: Verification: The software should conform to its specification. But then they speak about requirement verification, design verification etc. If I say that these items are "software" in terms of applying the definitons, what should I checked them against, what specification should requirements, which is the basic information, conform to? And one more thing: shouldnt be requirements also validated? To make sure they meets the customer needs? All texts I have speak only about SW validation on the end of the dev.process..

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  • sound stopped working after upgrade to 11.10 on Tuesday 20th March

    - by Hugh Barney
    My sound card stopped working after a set of updates were installed 2 days ago. The sound card is detected, the volume is not muted and the speakers work, I can make the speakers hum if I touch the jack plug lead that normally plugs into the card. hugh@lindisfarne:~$ lspci -v | grep -A7 -i "audio" 07:01.0 Multimedia audio controller: Creative Labs CA0106 Soundblaster Subsystem: Creative Labs SB0570 [SB Audigy SE] Flags: bus master, medium devsel, latency 32, IRQ 16 I/O ports at c000 [size=32] Capabilities: Kernel driver in use: CA0106 Kernel modules: snd-ca0106 I've tried reverting those upgraded packages that look like the could impact the kernal - but to no avail. alsamixer does not have anything muted, I've been though all the sound card debug/troubleshooting pages I can find. Kernal driver is attached. So whats gone pop ? I will boot from CD to check - but I am pretty sure this is a sw and not a hw problem.

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  • Build an ASP.NET 3.5 Guestbook using MS SQL Server and VB.NET

    One of the most important website features is a guest book. This is particularly useful if you need to know the responses and reactions of your website s visitors. With the release of ASP.NET 3.5 and Visual Web Developer Express 2 8 several web controls make it possible to create an ASP.NET application without the need to hard manually code everything including database scripts server side scripts etc. You can see how that would be helpful to writing a guest book. This is the first part of a multi-part series.... SW Deployment Automation Best Practices Free Guide for IT Leaders: Overcoming Software Distribution & Mgmt Challenges.

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  • Lean/Kanban *Inside* Software (i.e. WIP-Limits, Reducing Queues and Pull as Programming Techniques)

    - by Christoph
    Thinking about Kanban, I realized that the queuing-theory behind the SW-development-methodology obviously also applies to concurrent software. Now I'm looking for whether this kind of thinking is explicitly applied in some area. A simple example: We usually want to limit the number of threads to avoid cache-thrashing (WIP-Limits). In the paper about the disruptor pattern[1], one statement that I found interesting was that producer/consumers are rarely balanced so when using queues, either consumers wait (queues are empty), or producers produce more than is consumed, resulting in either a full capacity-constrained queue or an unconstrained one blowing up and eating away memory. Both, in lean-speak, is waste, and increases lead-time. Does anybody have examples of WIP-Limits, reducing/eliminating queues, pull or single piece flow being applied in programming? http://disruptor.googlecode.com/files/Disruptor-1.0.pdf

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  • Advice on how to understand in general and in practice IT Infrastructure

    - by Luca
    My IT knowledge resides mainly in SW development. I have just some basic know how about networks. On the net I tried to get information and read books in order to better understand the overall IT infrastrcuture, but all the sources I found are too generic or, mainly, too detailed in just one aspect, making me lost. Could anyone suggest some books or web resources as good compromise in details? My goal would be able to understand the network issues and security threats when, for example, two remote system have to be setup and put in connection each other. Considering this scenario there are several aspects to consider: firewalls, intranet/internet interconnections, certificates for httpS, etc. The argument is quite wide, therefore I was looking for something that might help to start to understand this subject without going too deep in details (Computer Networks from A.Tanenbaum is a wonderful milestone, but way too specific for my scope). Thanks

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  • Sources of requirements? [closed]

    - by user970696
    I was reading a book about SW engineering the other day and it went like: Sources of both functional and non-functional requirements are: law (for specific cases) business and user requirements etc. //what else then? So the question is, what other sources of requirements there are when an analyst is gathering the information? Lets consider a desktop app for mobile operator. As for the comment, I do not think this is a broad question as the books usually mention 1-2 sources. I would like to know more, if anyone can help.

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  • Quality Assurance tools discrepancies

    - by Roudak
    It is a bit ironic, yesterday I answered a question related to this topic that was marked to be good and today I'm the one who asks. These are my thoughts and a question: Also let's agree on the terms: QA is a set of activities that defines and implements processes during SW development. The common tool is the process audit. However, my colleague at work agrees with the opinion that reviews and inspections are also quality assurance tools, although most sources classify them as quality control. I would say both sides are partially right: during inspections, we evaluate a physical product (clearly QC) but we see it as a white box so we can check its compliance with set processes (QA). Do you think it is the reason of the dichotomy among the authors? I know it is more like an academic question but it deserves the answer :)

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  • How to auto mount partition on startup xubuntu?

    - by Bas
    I want to auto mount all my partitions on startup. But i can't get it to work as i'm new to xubuntu. This is how my fstab file looks like: proc /proc proc nodev,noexec,nosuid 0 0 #Entry for /dev/sda1 : UUID=3bf842ea-923b-43fe-b5f9-066fc920aaec / ext4 errors=remount-$ #Entry for /dev/sdb1 : UUID=F0C859BDC8598330 /media/Bas ntfs-3g defaults,locale=en_US.UTF-8 $ #Entry for /dev/sda3 : UUID=146213A76D02F7AD /media/sda3 ntfs-3g defaults,locale=en_US.UTF-8 $ UUID=1C33A98704D941F1 /media/sda3 ntfs-3g defaults,locale=en_US.UTF-8 $ #Entry for /dev/sda5 : UUID=ba48c631-5652-4ce7-85a3-bda96b353ca7 none swap sw 0 $ The last line I added myself but it's not working. I spend the whole day trying to figure this out without success. So can anyone help me with this? Thanks in advance

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  • STLport5.2.1 question in VC6.0

    - by vincent.chen
    hi all, today i install the STLPort5.2.1 to my VC6.0 and i test it out, it's okay in the console project, but it issue following question in the MFC project: Compiling... testMFCDlg.cpp d:\sw\vc6\vc98\stlport-5.2.1\stlport\errno.h(55) : fatal error C1189: #error : errno has been defined before inclusion of errno.h header. Error executing cl.exe. how could i avoid this question correctly, help , friends. best wishes, vincent.chen

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  • Nokia QT SDK on archlinux

    - by matiit
    Nokia realised qt sdk beta. http://www.forum.nokia.com/info/sw.nokia.com/id/e920da1a-5b18-42df-82c3-907413e525fb/Nokia_Qt_SDK.html Is it possible to run it on archlinux? Hm, it is able to run, but unfortunately there is too new libpng version in archlinux.

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  • Recommend a Semantic Web book?

    - by Logomachist
    I've looked around but most books seem to fall into one of two categories: Either the book talks about SW technologies but doesn't teach you how to use them Or the book is geared for very complex data modeling and ontology creation. Worse, many of those books are outdated. I'm looking for an up-to-date book that teaches technologies like RDF, SPARQL, RDFS, and GDDRL- and frameworks to make use of them. Any recommendations?

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  • Windows Azure: Creation of a file on cloud blob container

    - by veda
    I am writing a program that will be executing on the cloud. The program will generate an output that should be written on to a file and the file should be saved on the blob container. I don't have a idea of how to do that Will this code FileStream fs = new FileStream(file, FileMode.Create); StreamWriter sw = new StreamWriter(fs); generate a file named "file" on the cloud...

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