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• Send raw data to USB parallel port after upgrading to 11.10 oneiric

  - by zaphod

  I have a laser cutter connected via a generic USB to parallel adapter. The laser cutter speaks HPGL, as it happens, but since this is a laser cutter and not a plotter, I usually want to generate the HPGL myself, since I care about the ordering, speed, and direction of cuts and so on. In previous versions of Ubuntu, I was able to print to the cutter by copying an HPGL file directly to the corresponding USB "lp" device. For example: cp foo.plt /dev/usblp1 Well, I just upgraded to Ubuntu 11.10 oneiric, and I can't find any "lp" devices in /dev anymore. D'oh! What's the preferred way to send raw data to a parallel port in Ubuntu? I've tried System Settings Printing + Add, hoping that I might be able to associate my device with some kind of "raw printer" driver and print to it with a command like lp -d LaserCutter foo.plt But my USB to parallel adapter doesn't seem to show up in the list. What I do see are my HP Color LaserJet, two USB-to-serial adapters, "Enter URI", and "Network Printer". Meanwhile, over in /dev, I do see /dev/ttyUSB0 and /dev/ttyUSB1 devices for the 2 USB-to-serial adapters. I don't see anything obvious corresponding to the HP printer (which was /dev/usblp0 prior to the upgrade), except for generic USB stuff. For example, sudo find /dev | grep lp produces no output. I do seem to be able to print to the HP printer just fine, though. The printer setup GUI gives it a device URI starting with "hp:" which isn't much help for the parallel adapter. The CUPS administrator's guide makes it sound like I might need to feed it a device URI of the form parallel:/dev/SOMETHING, but of course if I had a /dev/SOMETHING I'd probably just go on writing to it directly. Here's what dmesg says after I disconnect and reconnect the device from the USB port: [ 924.722906] usb 1-1.1.4: USB disconnect, device number 7 [ 959.993002] usb 1-1.1.4: new full speed USB device number 8 using ehci_hcd And here's how it shows up in lsusb -v: Bus 001 Device 008: ID 1a86:7584 QinHeng Electronics CH340S Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x1a86 QinHeng Electronics idProduct 0x7584 CH340S bcdDevice 2.52 iManufacturer 0 iProduct 2 USB2.0-Print iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 96mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 7 Printer bInterfaceSubClass 1 Printer bInterfaceProtocol 2 Bidirectional iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 0 Device Status: 0x0000 (Bus Powered)

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• Are there any good Java/JVM libraries for my Expression Tree architecture?

  - by Snuggy

  My team and I are developing an enterprise-level application and I have devised an architecture for it that's best described as an "Expression Tree". The basic idea is that the leaf nodes of the tree are very simple expressions (perhaps simple values or strings). Nodes closer to the trunk will get more and more complex, taking the simpler nodes as their inputs and returning more complex results for their parents. Looking at it the other way, the application performs some task, and for this it creates a root expression. The root expression divides its input into smaller units and creates child expressions, which when evaluated it can use to build it's own result. The subdividing process continues until the simplest leaf nodes. There are two very important aspects of this architecture: It must be possible to manipulate nodes of the tree after it is built. The nodes may be given new input values to work with and any change in result for that node needs to be propagated back up the tree to the root node. The application must make best use of available processors and ultimately be scalable to other computers in a grid or in the cloud. Nodes in the tree will often be updating concurrently and notifying other interested nodes in the tree when they get a new value. Unfortunately, I'm not at liberty to discuss my actual application, but to aid understanding a little bit, you might imagine a kind of spreadsheet application being implemented with a similar architecture, where changes to cells in the table are propagated all over the place to other cells that need the result. The spreadsheet could get so massive that applying multi-core multi-computer distributed system to solve it would be of benefit. I've got my prototype "Expression Engine" working nicely on a single multi-core PC but I've started to run into a few concurrency issues (as expected because I haven't been taking too much care so far) so it's now time to start thinking about migrating the Engine to a more robust library, and that leads to a number of related questions: Is there any precedent for my "Expression Tree" architecture that I could research? What programming concepts should I consider. I realise this approach has many similarities to a functional programming style, and I'm already aware of the concepts of using futures and actors. Are there any others? Are there any languages or libraries that I should study? This question is inspired by my accidental discovery of Scala and the Akka library (which has good support for Actors, Futures, Distributed workloads etc.) and I'm wondering if there is anything else I should be looking at as well?

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• Operation times out trying to SSH outside LAN i.e. from internet to LAN no connection is established

  - by Pelle L

  I run Ubuntu 12.04 and have no success connecting with SSH from "Internet". The router is a TL-MR3420 which is set up to forward requests to one of the NIC's on ubuntu machine (which has in total 3 NICs). I can SSH from a client on the "local" network/LAN. The forward mechanism in the router seems to work. If I stop SSH service on the Ubuntu machine and instead start one on the windows machine - it works like a charm. I do not use the Std port 22 but that shouldn't be an issue as far as I understand - sine it works on the same port on the win machine. Since my public IS isn't static I use a dynDNS service but as said earlier the same setup works from the win machine. The router is located on 192.168.0.1 The Ubuntu NICs has the following IP: eth2 192.168.0.100 , eth1 192.168.0.101 , eth0 192.168.0.102 and I have forwarded the "outside" request to 192.168.0.100 In regards for firewall settings on the Ubuntu machine I have disabled the ufw and the command ufw status give status: inactive. I don't now it this is relevant information but teh command iptables --list give: Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination I have tried to catch traffic with help of wireshark (a tool I'm not too used to use) and it seems as a few (3?) "requests" actually reaches the NIC but ... nothing happens. The syslog does not show any entries during these attempts. Perhaps it could be some routing issues but I have reached my level of competence and are stuck ... all help and support to get this sorted out is much appreciated. I'm new to Linux so please do not assume I have a configuration that is correct - but as I wrote earlier - if the client that initiate SSH is on the LAN it all works. PS:I have also tried to get VPN (PPP) working from Internet with no success - once again VPN works on the windows machine ... so my best guess is that this is related to how the ubuntu machine handles (IP) traffic and not the TL-MR3420 router or other network issues.

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• RPi and Java Embedded GPIO: It all begins with hardware

  - by hinkmond

  So, you want to connect low-level peripherals (like blinky-blinky LEDs) to your Raspberry Pi and use Java Embedded technology to program it, do you? You sick foolish masochist. No, just kidding! That's awesome! You've come to the right place. I'll step you though it. And, as with many embedded projects, it all begins with hardware. So, the first thing to do is to get acquainted with the GPIO header on your RPi board. A "header" just means a thingy with a bunch of pins sticking up from it where you can connect wires. See the the red box outline in the photo. Now, there are many ways to connect to that header outlined by the red box in the photo (which the RPi folks call the P1 header). One way is to use a breakout kit like the one at Adafruit. But, we'll just use jumper wires in this example. So, to connect jumper wires to the header you need a map of where to connect which wire. That's why you need to study the pinout in the photo. That's your map for connecting wires. But, as with many things in life, it's not all that simple. RPi folks have made things a little tricky. There are two revisions of the P1 header pinout. One for older boards (RPi boards made before Sep 2012), which is called Revision 1. And, one for those fancy 512MB boards that were shipped after Sep 2012, which is called Revision 2. So, first make sure which board you have: either you have the Model A or B with 128MB or 256MB built before Sep 2012 and you need to look at the pinout for Rev. 1, or you have the Model B with 512MB and need to look at Rev. 2. That's all you need for now. More to come... Hinkmond

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• AS3 - At exactly 23 empty alpha channels, images below stop drawing

  - by user46851

  I noticed, while trying to draw large numbers of circles, that occasionally, there would be some kind of visual bug where some circles wouldn't draw properly. Well, I narrowed it down, and have noticed that if there is 23 or more objects with 00 for an alpha value on the same spot, then the objects below don't draw. It appears to be on a pixel-by-pixel basis, since parts of the image still draw. Originally, this problem was noticed with a class that inherited Sprite. It was confirmed to also be a problem with Sprites, and now Bitmaps, too. If anyone can find a lower-level class than Bitmap which doesn't have this problem, please speak up so we can try to find the origin of the problem. I prepared a small test class that demonstrates what I mean. You can change the integer value at line 20 in order to see the three tests I came up with to clearly show the problem. Is there any kind of workaround, or is this just a limit that I have to work with? Has anyone experienced this before? Is it possible I'm doing something wrong, despite the bare-bones implementation? package { import flash.display.Sprite; import flash.events.Event; import flash.display.Bitmap; import flash.display.BitmapData; public class Main extends Sprite { public function Main():void { if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(e:Event = null):void { removeEventListener(Event.ADDED_TO_STAGE, init); // entry point Test(3); } private function Test(testInt:int):void { if(testInt==1){ addChild(new Bitmap(new BitmapData(200, 200, true, 0xFFFF0000))); for (var i:int = 0; i < 22; i++) { addChild(new Bitmap(new BitmapData(100, 100, true, 0x00000000))); } } if(testInt==2){ addChild(new Bitmap(new BitmapData(200, 200, true, 0xFFFF0000))); for (var j:int = 0; j < 23; j++) { addChild(new Bitmap(new BitmapData(100, 100, true, 0x00000000))); } } if(testInt==3){ addChild(new Bitmap(new BitmapData(200, 200, true, 0xFFFF0000))); for (var k:int = 0; k < 22; k++) { addChild(new Bitmap(new BitmapData(100, 100, true, 0x00000000))); } var M:Bitmap = new Bitmap(new BitmapData(100, 100, true, 0x00000000)); M.x += 50; M.y += 50; addChild(M); } } } }

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• A Simple Entity Tagger

  - by Elton Stoneman

  In the REST world, ETags are your gateway to performance boosts by letting clients cache responses. In the non-REST world, you may also want to add an ETag to an entity definition inside a traditional service contract – think of a scenario where a consumer persists its own representation of your entity, and wants to keep it in sync. Rather than load every entity by ID and check for changes, the consumer can send in a set of linked IDs and ETags, and you can return only the entities where the current ETag is different from the consumer’s version.  If your entity is a projection from various sources, you may not have a persistent ETag, so you need an efficient way to generate an ETag which is deterministic, so an entity with the same state always generates the same ETag. I have an implementation for a generic ETag generator on GitHub here: EntityTagger code sample. The essence is simple - we get the entity, serialize it and build a hash from the serialized value. Any changes to either the state or the structure of the entity will result in a different hash. To use it, just call SetETag, passing your populated object and a Func<> which acts as an accessor to the ETag property: EntityTagger.SetETag(user, x => x.ETag); The implementation is all in at 80 lines of code, which is all pretty straightforward: var eTagProperty = AsPropertyInfo(eTagPropertyAccessor); var originalETag = eTagProperty.GetValue(entity, null); try { ResetETag(entity, eTagPropertyAccessor); string json; var serializer = new DataContractJsonSerializer(entity.GetType()); using (var stream = new MemoryStream()) { serializer.WriteObject(stream, entity); json = Encoding.UTF8.GetString(stream.GetBuffer(), 0, (int)stream.Length); } var guid = GetDeterministicGuid(json); eTagProperty.SetValue(entity, guid.ToString(), null); //... There are a couple of helper methods to check if the object has changed since the ETag value was last set, and to reset the ETag. This implementation uses JSON to do the serializing rather than XML. Benefit - should be marginally more efficient as your hashing a much smaller serialized string; downside, JSON doesn't include namespaces or class names at the root level, so if you have two classes with the exact same structure but different names, then instances which have the same content will have the same ETag. You may want that behaviour, but change to use the XML DataContractSerializer if you think that will be an issue. If you can persist the ETag somewhere, it will save you server processing to load up the entity, but that will only apply to scenarios where you can reliably invalidate your ETag (e.g. if you control all the entry points where entity contents can be updated, then you can calculate and persist the new ETag with each update).

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• Is there a factory pattern to prevent multiple instances for same object (instance that is Equal) good design?

  - by dsollen

  I have a number of objects storing state. There are essentially two types of fields. The ones that uniquely define what the object is (what node, what edge etc), and the others that store state describing how these things are connected (this node is connected to these edges, this edge is part of these paths) etc. My model is updating the state variables using package methods, so all these objects act as immutable to anyone not in Model scope. All Objects extend one base type. I've toyed with the idea of a Factory approach which accepts a Builder object and constructs the applicable object. However, if an instance of the object already exists (ie would return true if I created the object defined by the builder and passed it to the equal method for the existing instance) the factory returns the current object instead of creating a new instance. Because the Equal method would only compare what uniquely defines the type of object (this is node A to node B) but won't check the dynamic state stuff (node A is currently connected to nodes C and E) this would be a way of ensuring anyone that wants my Node A automatically knows its state connections. More importantly it would prevent aliasing nightmares of someone trying to pass an instance of node A with different state then the node A in my model has. I've never heard of this pattern before, and it's a bit odd. I would have to do some overriding of serialization methods to make it work (ensure that when I read in a serilized object I add it to my facotry list of known instances, and/or return an existing factory in its place), as well as using a weakHashMap as if it was a weakHashSet to know whether an instance exists without worrying about a quasi-memory leak occuring. I don't know if this is too confusing or prone to its own obscure bugs. One thing I know is that plugins interface with lowest level hardware. The plugins have to be able to return state that is different than my memory; to tell my memory when its own state is inconsistent. I believe this is possible despite their fetching objects that exist in my memory; we allow building of objects without checking their consistency with the model until the addToModel is called anyways; and the existing plugins design was written before all this extra state existed and worked fine without ever being aware of it. Should I just be using some other design to avoid this crazyness? (I have another question to that affect that I'm posting).

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• Finding Tools Guidance in OUM

  - by user716869

  OUM is not tool – specific. However, it does include tool guidance.  Tool guidance in OUM includes: a mention of a tool that could be used to complete a specific task(s) templates created with a specific tool example work products in a specific tool links to tool resources Tool Supplemental Guides So how do you find all this helpful tool information? Start at the lowest level first – the Task Overview.  Even though the task overviews are written tool-agnostic, they sometimes mention suggestions, or examples of a tool that might be used to complete the task.  More specific tool information can be found in the Task Overview, Templates and Tools section.  In some cases, the tool used to create the template (for example, Microsoft Word, Powerpoint, Project and Visio) is useful. The Templates and Tools section also provides more specific tool guidance, such as links to: White Papers Viewlets Example Work Products Additional Resources Tool Supplemental Guides If you’re more interested in seeing what tools might be helpful in general for your project or to see if there is any tool guidance for a specific tool that your project is committed to using, go to the Supplemental Guidance page in OUM.  This page is available from the Method Navigation pull down located in the header of almost every OUM page. When you open the Supplemental Guidance page, the first thing you see is a table index of everything that is included on the page.  At the top of the right column are all the Tool Supplemental Guides available in OUM.  Use the index to navigate to any of the guides. Next in the right column is Discipline/Industry/View Resources and Samples.  Use the index to navigate to any of these topics and see what’s available and more specifically, if there is any tool guidance available.  For example, if you navigate to the Cloud Resources, you will find a link to the IT Strategies from Oracle page that provides information for Cloud Practitioner Guides, Cloud Reference Architectures and Cloud White Papers, including the Cloud Candidate Selection Tool and Cloud Computing Maturity Model. The section for Method Tool and Technique Cross References can take you to the Task to Tool Cross Reference.  This page provides a task listing with possible helpful tools and links to more information regarding the tools.  By no means is this tool guidance all inclusive.  You can use other tools not mentioned in OUM to complete an OUM task. The Method Tool and Technique Cross References can also take you to the various Technique pages (Index and Cross References).  While techniques are not necessarily “tools,” they can certainly provide valuable assistance in completing tasks. In the Other Resources section of the Supplemental Guidance page, you find links to the viewlets and white papers that are included within OUM.

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• ETPM Forms Accelerator

  - by MHundal

  The ETPM Forms Accelerator provides a template that can be used to enter data related to Registration and Tax Forms.  The Forms Accelerator includes a worksheet for each portion related to forms development (Form Type, Form Section, Form Lines and Form Rules).  The Forms Accelerator provides the details that must be defined in ETPM.  This allows for taking an existing form and translating the details of that form into the spreadsheet.  The spreadsheet can then be used to define the details in the system.  In addition, each of the items to be defined is explained it detail - what the field expects and based on the input, how it impacts the field and form definition.   This is a living document - as there is feedback provided, the document will be updated.  The goal of this accelerator is to be an aide in the Forms Development process.  We encourage feedback to help improve the document.  The document is for ETPM 2.3.1.  Implementations using older version of ETPM will find that some of the field definition options may not exist their current system.   The spreadsheet attached contains the following Worksheets: Instructions:  High-level overview for the different worksheets provided. Form Type:  The fields to be populated when defining the Form Type for a Registration or Tax Form Form Section:  The fields to be populated when creating a Form Section.  The number of sections will differ based on the the form being implemented. Form Lines:  The fields to be populated when creating different Form Lines. The number of lines per section will differ based on the form being implemented. Form Rules:  Based on the form, allows for documenting the Form Rules to be configured based on form instructions and Form Lines. Right click on the link and select the "Save Link As" option.  ETPM Forms Accelerator.xls Please provide feedback to [email protected]. You feedback is encouraged and appreciated.  

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• is a factory pattern to prevent multuple instances for same object (instance that is Equal) good design?

  - by dsollen

  I have a number of objects storing state. There are essentially two types of fields. The ones that uniquly define what the object is (what node, what edge etc), and the oens that store state describing how these things are connected (this node is connected to these edges, this edge is part of these paths) etc. My model is updating the state variables using package methdos, so these objects all act as immutable to anyone not in Model scope. All Objects extend one base type. I've toyed with the idea of a Factory approch which accepts a Builder object and construct the applicable object. However, if an instance of the object already exists (ie would return true if I created the object defined by the builder and passed it to the equal method for the existing instance) the factory returns the current object instead of creating a new instance. Because the Equal method would only compare what uniquly defines the type of object (this is node A nto node B) but won't check the dynamic state stuff (node A is currently connected to nodes C and E) this would be a way of ensuring anyone that wants my Node A automatically knows it's state connections. More importantly it would prevent aliasing nightmares of someone trying to pass an instance of node A with different state then the node A in my model has. I've never heard of this pattern before, and it's a bit odd. I would have to do some overiding of serlization methods to make it work (ensure when I read in a serilized object I add it to my facotry list of known instances, and/or return an existing factory in it's place), as well as using a weakHashMap as if it was a weakHashSet to know rather an instance exists without worrying about a quasi-memory leak occuring. I don't know if this is too confusing or prone to it's own obscure bugs. One thing I know is that plugins interface with lowest level hardware. The plugins have to be able to return state taht is different then my memory; to tell my memory when it's own state is inconsistent. I believe this is possible despit their fetching objects that exist in my memory; we allow building of objects without checking their consistency with the model until the addToModel is called anyways; and the existing plugins design was written before all this extra state existed and worked fine without ever being aware of it. Should I just be using some other design to avoid this crazyness? (I have another question to that affect I'm posting).

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• Brute force algorithm implemented for sudoku solver in C [closed]

  - by 0cool

  This is my code that I have written in C.. It could solve certain level of problems but not the harder one.. I could not locate the error in it, Can you please find that.. # include <stdio.h> # include "sudoku.h" extern int sudoku[size][size]; extern int Arr[size][size]; int i, j, n; int BruteForceAlgorithm (void) { int val; for (i=0; i<size; i++) { for (j=0; j<size; j++) { if (sudoku[i][j]==0) { for (n=1; n<nmax; n++) { val = check (i,j,n); if ( val == 1) { sudoku[i][j]=n; // output(); break; } else if ( val == 0 && n == nmax-1 ) get_back(); } } } } } int get_back (void) { int p,q; int flag=0; for ( p=i; p>=0; p-- ) { for (q=j; q>=0; q-- ) { flag=0; if ( Arr[p][q]==0 && !( p==i && q==j) ) { if ( sudoku[p][q]== nmax-1 ) sudoku[p][q]=0; else { n = sudoku[p][q]; sudoku[p][q]=0; i = p; j = q; flag = 1; break; } } } if ( flag == 1) break; } } Code description: Sudoku.h has definitions related to sudoku solver. 1. size = 9 nmax = 10 2. check(i,j,n) returns 1 if a number "n" can be placed at (i,j) or else "0". What does this code do ? The code starts iterating from sudoku[0][0] to the end... if it finds a empty cell ( we take cell having "0" ), it starts checking for n=1 to n=9 which can be put in that.. as soon as a number can be put in that which is checked by check() it assigns it and breaks from loop and starts finding another empty cell. In case for a particular cell if it doesn't find "n" which can be assigned to sudoku cell.. it goes back to the previous empty cell and start iterating from where it stopped and assigns the next value and continues, Here comes the function get_back(). it iterates back..

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• WiFi on Ubuntu 12.04 custom: downloading unbearably slow

  - by Mark

  iwconfig reports 11 Mbps, yet I've seen as low as <1 KBps. This is the latest in my laundry list of Ubuntu problems in a dual-boot machine (cyberpowerpc custom, intel i7-3820, nvidia gtx 570). I received it two days ago, Windows 7 running fine, still having problems with Ubuntu. The browsing is intermittent but unacceptable. e.g. I could get to this site last night but I couldn't post this question. The downloading is unbearably slow, I can't download anything or install any packages because the speed is so slow. e.g. I am trying to install vim which is inexplicably missing from my 12.04 install (add another one to the problems list) and my download speed reported in the terminal was 241 B/s. Yes, bytes. iwconfig reports 11 Mbps, which further adds to the confusion. User@ubuntu:~$ iwconfig lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"linksys" Mode:Managed Frequency:2.437 GHz Access Point: 00:18:39:76:2C:A1 Bit Rate=11 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=36/70 Signal level=-74 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:54 Invalid misc:18 Missed beacon:0 eth0 no wireless extensions. Any ideas? I see this is a problem a lot of people, but none of the on line solutions have worked for me so far. e.g. one site recommends editing the ath9k.conf file in /etc/modprobe.d, yet this file isn't even in the folder: User@ubuntu:/$ cd etc/modprobe.d User@ubuntu:/etc/modprobe.d$ ls alsa-base.conf blacklist-oss.conf blacklist-ath_pci.conf blacklist-rare-network.conf blacklist.conf blacklist-watchdog.conf blacklist-firewire.conf dkms.conf blacklist-framebuffer.conf nvidia-current_hybrid.conf blacklist-modem.conf nvidia-graphics-drivers.conf I think the nvidia gpu might be mucking things up. I had the "blinking cursor" problem when installing in the first place, and then I had the monitor out of range problem as well. I have my faithful Asus laptop, which is running Ubuntu 12.04 just fine. The only difference is executing host -t SOA local in the terminal gives User@ubuntu:~$ host -t SOA local local has SOA record local. nobody.localhost. 42 86400 43200 604800 10800 in my new machine, and the command reports Host local. not found in the laptop. Help would be most welcome, as I am in danger of reverting back to Windows. I'm seriously considering it. Sorry for the length, trying to show my effort in resolving the issue and include terminal snippets that might be helpful.

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• JDK 8u20 Documentation Updates

  - by joni g.

  JDK 8u20 has been released and is available from the Java Downloads page. See the JDK 8u20 Update Release Notes for details. Highlights for this release: The Medium security level has been removed. Now only High and Very High levels are available. Applets that do not conform with the latest security practices can still be authorized to run by adding the sites that host them to the Exception Site List. See Security for more information. The javafxpackager tool has been renamed to javapackager, and supports both Java and JavaFX applications. The -B option has been added to the javapackager deploy command to enable arguments to be passed to the bundlers that are used to create self-contained applications. See javapackager for Windows or Linux and OS X for information. The <fx:bundleArgument> helper parameter argument has been added to enable arguments to be passed to the bundlers when using ant tasks. See JavaFX Ant Task Reference for more information. A new attribute is available for JAR file manifests. The Entry-Point attribute is used to identify the classes that are allowed to be used as entry points to your application. See Entry-Point Attribute for more information. A new Microsoft Windows Installer (MSI) Enterprise JRE Installer, which enables users to install the JRE across the enterprise, is available for Java SE Advanced or Java SE Suite licensees. See Downloading the Installer in JRE Installation For Microsoft Windows for more information. The following new configuration parameters are added to the installation process to support commercial features, for use by Java SE Advanced or Java SE Suite licensees only: USAGETRACKERCFG= DEPLOYMENT_RULE_SET= See Installing With a Configuration File for more information about these and other installer parameters. Documentation highlights: New Troubleshooting Guide combines and replaces the Desktop Technologies Troubleshooting Guide and the HotSpot Virtual Machine Troubleshooting Guide to provide a single location for diagnosing and solving problems that might occur with Java Client applications. New Deployment Guide combines and replaces the JavaFX Deployment Guide and the Java Rich Internet Applications Guide to provide a single location for information about the Java packaging tools, creating self-contained applications, and deploying Java and JavaFX applications. New Garbage Collection Tuning Guide describes the garbage collectors included with the Java HotSpot VM and helps you choose which one to use. The Java Tutorials have a new look.

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• iOS app with a lot of text

  - by rdurand

  I just asked a question on StackOverflow, but I'm thinking that a part of it belongs here, as questions about design pattern are welcomed by the faq. Here is my situation. I have developed almost completely a native iOS app. The last section I need to implement is all the rules of a sport, so that's a lot of text. It has one main level of sections, divided in subsections, containing a lot of structured text (paragraphs, a few pictures, bulleted/numbered lists, tables). I have absolutely no problem with coding, I'm just looking for advice to improve and make the best design pattern possible for my app. My first shot (the last one so far) was a UITableViewController containing the sections, sending the user to another UITableViewController with the subsections of the selected section, and then one strange last UITableViewController where the cells contain UITextViews, sections header help structure the content, etc. What I would like is your advice on how to improve the structure of this section. I'm perfectly ready to destroy/rebuild the whole thing, I'm really lost in my design here.. As I said on SO, I've began to implement a UIWebView in a UIViewController, showing a html page with JQuery Mobile to display the content, and it's fine. My question is more about the 2 views taking the user to that content. I used UITableViewControllers because that's what seemed the most appropriate for a structured hierarchy like this one. But that doesn't seem like the best solution in term of user experience.. What structure / "view-flow" / kind of presentation would you try to implement in my situation? As always, any help would be greatly appreciated! Just so you can understand better the hierarchy, with a simple example : -----> Section 1 -----> SubSection 1.1 -----> Content | -----> SubSection 1.2 -----> Content | -----> SubSection 1.3 -----> Content | | | UINavigationController -------> Section 2 -----> SubSection 2.1 -----> Content | -----> SubSection 2.2 -----> Content | -----> SubSection 2.3 -----> Content | -----> SubSection 2.4 -----> Content | -----> SubSection 2.5 -----> Content | -----> Section 3 -----> SubSection 3.1 -----> Content -----> SubSection 3.2 -----> Content |------------------| |--------------------| |-------------| 1 UITableViewController 3 UITableViewControllers 10 UIViewControllers (3 rows) (with different with a UIWebView number of rows)

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• Strangling the life out of Software Testing

  - by MarkPearl

  I recently did a course at the local university on Software Engineering. At the beginning of the course I looked over the outline of the subject and there seemed to be some really good content. It covered traditional & agile project methodologies, some general communication and modelling chapters and finished off with testing. I was particularly excited to see the section on testing as this was something I learnt on my own and see great value in. The course has now just ended and I am very disappointed. I now know one of the reasons why so few people i.e. in my region do Test Driven Development, or perform even basic testing methodologies. The topic was to academic! Yes, you might be able to list 4 different types of black box test approaches vs. white box test approaches and describe the characteristics of Smoke Tests, but never during course did we see an example of an actual test or how it might be implemented! In fact, if I did not have personal experience of applying testing in actual projects, I wouldn’t even know what a unit test looked like. Now, what worries me is the following… It took us 6 months to cover the course material, other students more than likely came out of that course with little appreciation of the subject – in fact they now have a very complex view of what a test is – so complex that I think most of them will never attempt it again on their own. Secondly, imagine studying to be a dentist without ever actually seeing a tooth? Yes, you might be able to describe a tooth, and know what it is made out of – but nobody would want a dentist who has never seen a tooth to operate on them. Yet somehow we expect people studying software engineering to do the same? This is not right. Now, before I finish my rant let me say that I know this is not the same everywhere in the world, and that there needs to be a balance on practical implementation and academic understanding – I am just disappointed that this does not seem to be happening at the institution that I am currently studying at ;-( Please, if you happen to be a lecturer or teacher reading this post – a combination of theory and practical's goes a long way. We need to up the quality of software being produced and that starts at learner level!

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• Recommended learning path?

  - by stairmast0r

  First, my current standing: I know C++ at an.. advanced beginner level? I've gone through a book, I know the syntax well enough, I know a fair amount of standard library functions, and I've programmed some simple console stuff with it. I'd probably be able to program more with it if I knew how to structure a program, but I just can't seem to wrap my head around the whole concept of structuring something remotely complex. I've messed around with Java for a day or two, and the syntax was extremely easy to get the hang of, except that I didn't really know any functions. I'm plenty willing to learn, and to work hard to do so, but I don't really know where to go from here. Now, at the risk of sounding cliche, what I'd like to become is someone like the great three of id; Carmack, Romero, and Abrash. To be considered a genius. I believe anything can be learned, and nothing mentally limits anyone except lack of desire to learn. But I don't know how to learn this. They learned by doing, and making do with what resources they had. On the other hand, I have access to almost any books I want, access to the internet, and access to a more than capable computer and software. Should I learn more languages? Assembly? LISP? BASIC? Haskell? Should I dive straight into advanced topics like OpenGL? Or should I wait until I feel I've come closer to mastering the simpler things, like console programs, first? Should I follow tutorials? Should I follow books? Should I just dive into writing something and follow a reference manual as I go? What order should I do all this in? How should I do it? I want to completely master this; to be considered a genius. The most perfect career I can imagine is to start the next id. I have the drive to do it, I just don't know where to begin...

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• Down to the Wire - Yet More Solaris Things to See at OpenWorld (and JavaOne!)

  - by Larry Wake

  San Francisco is bracing for the annual invasion. The airport's jammed, the tweets are flying, and the numbers are crazy: more than 50,000 attendees and 2,500+ sessions, taking over Moscone Convention Center, two streets, Union Square, and seemingly every hotel in town (98,000 hotel room nights). So yeah, it's busy. And it's not just OpenWorld--we've also got JavaOne, MySQL Connect, and four other sub-events going on as well. Speaking of JavaOne, you can find Solaris-related activity there, too -- I've highlighted one hands-on lab below. Here's a last pre-event roundup of activities for consideration; enjoy the show(s)! (Remember, Schedule Builder is your friend; use it with the session numbers below to register.) Monday, October 1st: 3:15 PM - General Session: Accelerate Your Business with the Oracle Hardware Advantage(GEN9691, Moscone North Hall D) John Fowler, head of Oracle's Systems organization, will talk about Oracle hardware technology and how it's co-engineered with other key technologies, including Oracle Solaris. Tuesday, October 2nd: 10:15 AM - Building an IaaS Platform with SPARC, Oracle Solaris 11, and Oracle VM Server for SPARC(CON4431, Moscone South 270)Get the birds-eye lowdown (whatever that means) on how U.S. Cellular  built its Infrastructure as a Service (IaaS) cloud delivery platform with Oracle’s SPARC T4 servers, Oracle Solaris 11, Oracle Solaris Cluster 4, and Oracle VM Server for SPARC. The session covers the high-level design, business case made, implementation details, and lessons learned. 11:45 AM - Oracle Solaris 11 Panel: Insights and Directions from Oracle Solaris Core Engineering(CON8790, Moscone South 252) This has been one of the livelier Solaris-related sessions in years past (and I'm not saying that just because I get to moderate it this year). A panel of core engineers responsible for a wide range of key Solaris technologies will talk about some of the interesting work they've been doing -- but mostly we keep time open for the panel to take questions from attendees, because that's the fun part. Wednesday, October 3rd: 10:00 AM - Tracing Your Java Application Tuning on Oracle Solaris with DTrace(HOL10214, Hilton San Francisco, Franciscan A/B/C/D) This JavaOne hands-on lab will show how to use the DTrace framework to dynamically trace your Java applications on Oracle Solaris and uncover new tuning opportunities. Thursday, October 4th: 12:45 PM - Oracle Solaris 11: Optimized for Oracle Database, Oracle WebLogic Server, and Java(CON8800, Moscone South 252) Explore how Oracle Solaris 11 has been built to be the best platform for the cloud and enterprise applications, with built-in optimizations to improve performance and deliver unique functionality with Oracle Database, Oracle WebLogic Server, and Java.

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• 11g ???:Active Data Guard

  - by JaneZhang(???)

  ?Oracle 11g??,????(physical Standby)???redo???,???????,???mount??11g??,???redo???,????????read-only??,????Active Data Guard ???Active Data Guard,?????????????????,??????????????   Active Data Guard???????????,??,????????????,????????,????redo??,????????????,??????????? Oracle Active Data Guard ?Oracle Database Enterprise Edition?????,??????????????   ????Active Data Guard, ??????? read-only ????,???? ALTER DATABASE RECOVER MANAGED STANDBY DATABASE????????????:??????COMPATIBLE ????????11.0.0?  ???????Active Data Guard,???V$DATABASE????"READ ONLY WITH APPLY':      SQL> SELECT open_mode FROM V$DATABASE;      OPEN_MODE      --------------------      READ ONLY WITH APPLY   ????????????,???????real-time apply:   SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE; ?????????read-only????????:    • Issue SELECT statements, including queries that require multiple sorts that leverage TEMP segments    • Use ALTER SESSION and ALTER SYSTEM statements    • Use SET ROLE    • Call stored procedures    • Use database links (dblinks) to write to remote databases    • Use stored procedures to call remote procedures via dblinks    • Use SET TRANSACTION READ ONLY for transaction level read consistency    • Issue complex queries (such as grouping SET queries and WITH CLAUSE queries) ??????????read-only????????:    • Any DMLs (excluding simple SELECT statements) or DDLs    • Query accessing local sequences    • DMLs to local temporary tables    ?????Active Data Guard ??: • ????????????????? • ???Oracle Real Application Clusters (Oracle RAC) ,?????? • RAC???RAC??    Oracle Data Guard ?????,,????????:    * ?????????????????:     http://docs.oracle.com/cd/B28359_01/server.111/b28294/create_ps.htm   * ???Oracle Real Application Clusters (Oracle RAC) ,??????:     http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimarysingleinstance-131970.pdf   * RAC ???RAC ??:     http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimaryracphysicalsta-131940.pdf  ??Active Data Guard???????,?????:    http://www.oracle.com/technetwork/database/features/availability/maa-wp-11gr1-activedataguard-1-128199.pdf     ??Oracle Maximum Availability Architecture Best Practices?????,???:   http://www.oracle.com/goto/maa

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• ?RAC??????(Rolling)??/????????

  - by JaneZhang(???)

     ?RAC??????????,???????,???????????(Rolling),????,???????,??????????,???????????,????????,???????????????,?????????????????,???????   ?????????????????Rolling???,???????????Rolling?,?????????? ????,???Rolling???????:1. ?????2. ?????,????????????3. ????????????????????4. ??????,????????????????5. ?????????Readme????????????:1). ?oracle???????????????????.2). ??????:3). ??1????ORACLE_HOME?????????+ASM??(???);4). ?1?????:$cd $ORACLE_HOME/OPatch/10082277$opatch apply5). ??opatch????????????,??????????:6). ??1????ORACLE_HOME?????????+ASM??(???);7). ??2????ORACLE_HOME?????????+ASM??(???);8). ?????????????,??????????;9). ??2????ORACLE_HOME?????????+ASM??(???);10).???????,????? ????10.2.0.4 RAC???(Rolling)????8575528???:1).?oracle???????????????????,??:$ORACLE_HOME/OPatch??.$ pwd/u01/app/oracle/OPatch$ lsdocs  emdpatch.pl  jlib  opatch  opatch.ini  opatch.pl  opatchprereqs  p8575528_10204_Linux-x86.zip2).??????:su - oracle$ unzip p8575528_10204_Linux-x86.zipArchive:  p8575528_10204_Linux-x86.zip  creating: 8575528/  creating: 8575528/files/  creating: 8575528/files/lib/  creating: 8575528/files/lib/libserver10.a/ inflating: 8575528/files/lib/libserver10.a/kks1.o inflating: 8575528/files/lib/libserver10.a/kksc.o inflating: 8575528/files/lib/libserver10.a/kksh.o inflating: 8575528/files/lib/libserver10.a/ksmp.o  creating: 8575528/etc/  creating: 8575528/etc/config/ inflating: 8575528/etc/config/inventory inflating: 8575528/etc/config/actions  creating: 8575528/etc/xml/ inflating: 8575528/etc/xml/GenericActions.xml inflating: 8575528/etc/xml/ShiphomeDirectoryStructure.xml inflating: 8575528/README.txt    $ ls8575528  docs  emdpatch.pl  jlib  opatch  opatch.ini  opatch.pl  opatchprereqs  p8575528_10204_Linux-x86.zip3).????????????RAC?????(rolling)?$ $ORACLE_HOME/OPatch/opatch query -all /u01/app/oracle/OPatch/8575528|grep rollingPatch is a rolling patch: true <=====??????4).??1??????ORACLE_HOME?????????(???ASM,????):$srvctl stop instance -d <dbname> -i <instance_name>$srvctl stop asm -n <nodename>??:$srvctl stop instance -d ONEPIECE -i ONEPIECE1$srvctl stop asm -n nascds14$ crs_stat -tName           Type           Target    State     Host      ------------------------------------------------------------ora....E1.inst application    OFFLINE   OFFLINE            ora....SM1.asm application    OFFLINE   OFFLINE5). ?1?????:??:$su - oracle$cd /u01/app/oracle/OPatch/8575528$opatch applyInvoking OPatch 10.2.0.4.2Oracle Interim Patch Installer version 10.2.0.4.2Copyright (c) 2007, Oracle Corporation.  All rights reserved.Oracle Home       : /u01/app/oracleCentral Inventory : /home/oracle/oraInventory  from           : /etc/oraInst.locOPatch version    : 10.2.0.4.2OUI version       : 10.2.0.4.0OUI location      : /u01/app/oracle/ouiLog file location : /u01/app/oracle/cfgtoollogs/opatch/opatch2012-06-13_01-27-38AM.logApplySession applying interim patch '8575528' to OH '/u01/app/oracle'Running prerequisite checks...OPatch detected the node list and the local node from the inventory.  OPatch will patch the local system thenpropagate the patch to the remote nodes.This node is part of an Oracle Real Application Cluster.Remote nodes: 'nascds15'Local node: 'nascds14'Please shutdown Oracle instances running out of this ORACLE_HOME on the local system.(Oracle Home = '/u01/app/oracle')Is the local system ready for patching? [y|n]y <======??yUser Responded with: YBacking up files and inventory (not for auto-rollback) for the Oracle HomeBacking up files affected by the patch '8575528' for restore. This might take a while...Backing up files affected by the patch '8575528' for rollback. This might take a while...Patching component oracle.rdbms, 10.2.0.4.0...Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/kks1.o"Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/kksc.o"Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/kksh.o"Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/ksmp.o"Running make for target ioracleApplySession adding interim patch '8575528' to inventoryVerifying the update...Inventory check OK: Patch ID 8575528 is registered in Oracle Home inventory with proper meta-data.Files check OK: Files from Patch ID 8575528 are present in Oracle Home.The local system has been patched.  You can restart Oracle instances on it.Patching in rolling mode.The node 'nascds15' will be patched next.Please shutdown Oracle instances running out of this ORACLE_HOME on 'nascds15'.(Oracle Home = '/u01/app/oracle')Is the node ready for patching? [y|n]6). ??opatch????????????????????????7). ??1???ASM ????????:$srvctl start asm -n <nodename>$srvctl start instance -d <dbname> -i <instance_name>??:$srvctl start asm -n nascds14$srvctl start instance -d ONEPIECE -i ONEPIECE1$crs_stat -tora....E1.inst application    ONLINE    ONLINE    nascds14  ora....SM1.asm application    ONLINE    ONLINE    nascds148).??2???ASM????????:$srvctl stop instance -d <dbname> -i <instance_name>$srvctl stop asm -n <nodename>$srvctl stop instance -d ONEPIECE -i ONEPIECE2$srvctl stop asm -n nascds15$crs_statora....E2.inst application    OFFLINE   OFFLINE            ora....SM2.asm application    OFFLINE   OFFLINE9). ?????????????,???????????Is the node ready for patching? [y|n] y <====??yUser Responded with: YUpdating nodes 'nascds15'  Apply-related files are:    FP = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_files.txt"    DP = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_dirs.txt"    MP = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/make_cmds.txt"    RC = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/remote_cmds.txt"Instantiating the file "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_files.txt.instantiated"by replacing $ORACLE_HOME in "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_files.txt" withactual path.Propagating files to remote nodes...Instantiating the file "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_dirs.txt.instantiated"by replacing $ORACLE_HOME in "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_dirs.txt" withactual path.Propagating directories to remote nodes...Instantiating the file "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/make_cmds.txt.instantiated"by replacing $ORACLE_HOME in "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/make_cmds.txt" withactual path.Running command on remote node 'nascds15':cd /u01/app/oracle/rdbms/lib; /usr/bin/make -f ins_rdbms.mk ioracle ORACLE_HOME=/u01/app/oracle || echoREMOTE_MAKE_FAILED::>&2The node 'nascds15' has been patched.  You can restart Oracle instances on it.There were relinks on remote nodes.  Remember to check the binary size and timestamp on the nodes 'nascds15' .The following make commands were invoked on remote nodes:'cd /u01/app/oracle/rdbms/lib; /usr/bin/make -f ins_rdbms.mk ioracle ORACLE_HOME=/u01/app/oracle'OPatch succeeded.10). ??2???ASM????????:$srvctl start asm -n <nodename>$srvctl start instance -d <dbname> -i <instance_name>??:$srvctl start asm -n nascds15$srvctl start instance -d ONEPIECE -i ONEPIECE211).??????????????????????????$ORACLE_HOME/OPatch/opatch lsinventory[oracle@nascds14 8575528]$ $ORACLE_HOME/OPatch/opatch lsinventoryInvoking OPatch 10.2.0.4.2Oracle Interim Patch Installer version 10.2.0.4.2Copyright (c) 2007, Oracle Corporation.  All rights reserved.Oracle Home       : /u01/app/oracleCentral Inventory : /home/oracle/oraInventory  from           : /etc/oraInst.locOPatch version    : 10.2.0.4.2OUI version       : 10.2.0.4.0OUI location      : /u01/app/oracle/ouiLog file location : /u01/app/oracle/cfgtoollogs/opatch/opatch2012-06-13_01-44-11AM.logLsinventory Output file location : /u01/app/oracle/cfgtoollogs/opatch/lsinv/lsinventory2012-06-13_01-44-11AM.txt--------------------------------------------------------------------------------Installed Top-level Products (2):Oracle Database 10g                                                  10.2.0.1.0Oracle Database 10g Release 2 Patch Set 3                            10.2.0.4.0There are 2 products installed in this Oracle Home.Interim patches (1) :Patch  8575528      : applied on Wed Jun 13 01:28:24 CST 2012<<<<<<<<<<<<<<<<<<<  Created on 17 Aug 2010, 07:56:36 hrs PST8PDT  Bugs fixed:    8575528Rac system comprising of multiple nodes Local node = nascds14 Remote node = nascds15--------------------------------------------------------------------------------OPatch succeeded.Rac system comprising of multiple nodes Local node = nascds14 Remote node = nascds15--------------------------------------------------------------------------------OPatch succeeded. ????10.2.0.4 RAC???(Rolling)????8575528???: 1).??1?????ORACLE_HOME?????????(???ASM,????):$srvctl stop instance -d <dbname> -i <instance_name>$srvctl stop asm -n <nodename>??:$srvctl stop instance -d ONEPIECE -i ONEPIECE1$srvctl stop asm -n nascds14$crs_stat -tName           Type           Target    State     Host        ------------------------------------------------------------ora....E1.inst application    OFFLINE   OFFLINE              ora....SM1.asm application    OFFLINE   OFFLINE  2). ?1??????:??:$su - oracle$cd $ORACLE_HOME/OPatch/8575528$opatch rollback -id 8575528Invoking OPatch 10.2.0.4.2Oracle Interim Patch Installer version 10.2.0.4.2Copyright (c) 2007, Oracle Corporation.  All rights reserved.Oracle Home       : /u01/app/oracleCentral Inventory : /home/oracle/oraInventory  from           : /etc/oraInst.locOPatch version    : 10.2.0.4.2OUI version       : 10.2.0.4.0OUI location      : /u01/app/oracle/ouiLog file location : /u01/app/oracle/cfgtoollogs/opatch/opatch2012-06-13_18-22-10PM.logRollbackSession rolling back interim patch '8575528' from OH '/u01/app/oracle'Running prerequisite checks...OPatch detected the node list and the local node from the inventory.  OPatch will patch the local system thenpropagate the patch to the remote nodes.This node is part of an Oracle Real Application Cluster.Remote nodes: 'nascds15'Local node: 'nascds14'Please shut down Oracle instances running out of this ORACLE_HOME on all the nodes.(Oracle Home = '/u01/app/oracle')Are all the nodes ready for patching? [y|n]y <=========??yUser Responded with: YBacking up files affected by the patch '8575528' for restore. This might take a while...Patching component oracle.rdbms, 10.2.0.4.0...Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/kks1.o"Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/kksc.o"Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/kksh.o"Updating archive file "/u01/app/oracle/lib/libserver10.a"  with "lib/libserver10.a/ksmp.o"Running make for target ioracleRollbackSession removing interim patch '8575528' from inventoryPatching in rolling mode.The node 'nascds15' will be patched next.Please shutdown Oracle instances running out of this ORACLE_HOME on 'nascds15'.(Oracle Home = '/u01/app/oracle')Is the node ready for patching? [y|n]3). ??opatch????????????????????????????4). ??1??ASM ????????:$srvctl start asm -n <nodename>$srvctl start instance -d <dbname> -i <instance_name>??:$srvctl start asm -n nascds14$srvctl start instance -d ONEPIECE -i ONEPIECE1$crs_stat -tora....E1.inst application    ONLINE    ONLINE    nascds14    ora....SM1.asm application    ONLINE    ONLINE    nascds145).??2???ASM????????:$srvctl stop instance -d <dbname> -i <instance_name>$srvctl stop asm -n <nodename>$srvctl stop instance -d ONEPIECE -i ONEPIECE2$srvctl stop asm -n nascds15$crs_stat -tora....E2.inst application    OFFLINE   OFFLINE              ora....SM2.asm application    OFFLINE   OFFLINE  6). ??????????????,??????????The node 'nascds15' will be patched next.Please shutdown Oracle instances running out of this ORACLE_HOME on 'nascds15'.(Oracle Home = '/u01/app/oracle')Is the node ready for patching? [y|n]y <=========??yUser Responded with: YUpdating nodes 'nascds15'  Rollback-related files are:    FR = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/remove_files.txt"    DR = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/remove_dirs.txt"    FP = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_files.txt"    MP = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/make_cmds.txt"    RC = "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/remote_cmds.txt"Instantiating the file "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/remove_dirs.txt.instantiated"by replacing $ORACLE_HOME in "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/remove_dirs.txt" withactual path.Removing directories on remote nodes...Instantiating the file "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_files.txt.instantiated"by replacing $ORACLE_HOME in "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_files.txt" withactual path.Propagating files to remote nodes...Instantiating the file "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_dirs.txt.instantiated"by replacing $ORACLE_HOME in "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/copy_dirs.txt" withactual path.Propagating directories to remote nodes...Instantiating the file "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/make_cmds.txt.instantiated"by replacing $ORACLE_HOME in "/u01/app/oracle/.patch_storage/8575528_Aug_17_2010_07_56_36/rac/make_cmds.txt" withactual path.Running command on remote node 'nascds15':cd /u01/app/oracle/rdbms/lib; /usr/bin/make -f ins_rdbms.mk ioracle ORACLE_HOME=/u01/app/oracle || echoREMOTE_MAKE_FAILED::>&2The node 'nascds15' has been patched.  You can restart Oracle instances on it.There were relinks on remote nodes.  Remember to check the binary size and timestamp on the nodes 'nascds15' .The following make commands were invoked on remote nodes:'cd /u01/app/oracle/rdbms/lib; /usr/bin/make -f ins_rdbms.mk ioracle ORACLE_HOME=/u01/app/oracle'OPatch succeeded.7). ??2???ASM????????:$srvctl start asm -n <nodename>$srvctl start instance -d <dbname> -i <instance_name>??:$srvctl start asm -n nascds15$srvctl start instance -d ONEPIECE -i ONEPIECE28).??????????????????????????$ $ORACLE_HOME/OPatch/opatch lsinventoryInvoking OPatch 10.2.0.4.2Oracle Interim Patch Installer version 10.2.0.4.2Copyright (c) 2007, Oracle Corporation.  All rights reserved.Oracle Home       : /u01/app/oracleCentral Inventory : /home/oracle/oraInventory  from           : /etc/oraInst.locOPatch version    : 10.2.0.4.2OUI version       : 10.2.0.4.0OUI location      : /u01/app/oracle/ouiLog file location : /u01/app/oracle/cfgtoollogs/opatch/opatch2012-06-13_19-40-41PM.logLsinventory Output file location : /u01/app/oracle/cfgtoollogs/opatch/lsinv/lsinventory2012-06-13_19-40-41PM.txt--------------------------------------------------------------------------------Installed Top-level Products (2):Oracle Database 10g                                                  10.2.0.1.0Oracle Database 10g Release 2 Patch Set 3                            10.2.0.4.0There are 2 products installed in this Oracle Home.There are no Interim patches installed in this Oracle Home.Rac system comprising of multiple nodes Local node = nascds14 Remote node = nascds15--------------------------------------------------------------------------------OPatch succeeded.

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• What does this SAP error mean? recv104 NiIReadrecv nixxi.cp5087

  - by Techboy

  I have an SAP BI Portal system and an SAP BW system. In the Visual Administrator of the BI Portal, section 'JCo RFC Provider' I have created some RFC listeners. In the SAP BW system (in transaction SM59), I have created, tested and activated the relevant RFC connections. When I start a JCo RFC Provider in the BI Portal the BW system that it communicates with produces these errors (displayed from SAP transaction SM21): Operating system call recv failed (error no. 104 ) Module nam Line Error text Caller.... Reason/cal nixxi.cp 5087 recv104 NiIRead recv Documentation for system log message Q0 I : The specified operating system call was returned with an error. For communication calls (receive, send, etc) often the cause of errors are network problems. It could also be a configuration problem at operating system level. (file cannot be opened, no space in the file system etc.). Additional specifications for error number 104 Name for errno number E_UNKNOWN_NO The meaning of the value stored in 'errno' is platform-dependent. The value which occurred here is unknown to the SysLog system. Either there is an incorrect error number in the SysLog message, or the tables TSLE2 or TSLE3 are not completely maintained. Technical details File Offset RecFm System log type Grp N variable message data 6 410220 m Error (Function,Module,Row) Q0 I recv104 NiIReadrecv nixxi.cp5087 There is plenty of space left in the file system, the servers can ping each other and there is no firewall between the servers. The tables (TSLE2 or TSLE3) mentioned in the error message do not provide any additional information. Please can you tell me if this error message refers to something specific, or if it is generic: recv104 NiIReadrecv nixxi.cp5087

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• SD Card reader not working on Sony Vaio

  - by TessellatingHeckler

  This laptop (Sony Vaio VGN-Z31MN/B PCG-6z2m) has been installed with Windows 7 64 bit, all the drivers from Sony's VAIO site are installed, and everything in Device Manager both (a) has a driver and (b) shows as working, no exclamation marks or warnings. "Hide empty drives" in Folder options is disabled so the card reader appears, but will not read the card ("please insert a disk in drive O:"). Previously, when the laptop had Windows XP on it, it could read the same card. Also, Windows update suggested driver ("SD Card Reader") doesn't work, Ricoh own drivers install properly but do the same behaviour. Other 3rd party driver suggestions from forums (Acer and Texas-Instruments FlashMedia) do not seem to install properly. I would post the PCI id if I had it, but it was just showing up as rimsptsk\diskricohmemorystickstorage (while it had the Ricoh Driver installed). Edit: If there are any lower level diagnostic utlities which might shed more light on it I'd welcome hearing of them. Anything which might show get it to put troubleshooting logs in the event log or identify chipsets or whatever... Update: Device details are: SD\VID_03&OID_5344&PID_SD04G&REV_8.0\5&4617BC3&0&0 : SD Memory Card PCI\VEN_8086&DEV_2934&SUBSYS_9025104D&REV_03\3&21436425&0&E8: Intel(R) ICH9 Family USB Universal Host Controller - 2934 PCI\VEN_1180&DEV_0476&SUBSYS_9025104D&REV_BA\4&1BD7BFCD&0&20F0: Ricoh R/RL/5C476(II) or Compatible CardBus Controller RIMSPTSK\DISK&VEN_RICOH&PROD_MEMORYSTICKSTORAGE&REV_1.00\MS0001: SD Storage Card PCI\VEN_1180&DEV_0592&SUBSYS_9025104D&REV_11\4&1BD7BFCD&0&24F0: Ricoh Memory Stick Host Controller WPDBUSENUMROOT\UMB\2&37C186B&1&STORAGE#VOLUME#_??_RIMSPTSK#DISK&VEN_RICOH&PROD_MEMORYSTICKSTORAGE&REV_1.00#MS0001#: O:\ STORAGE\VOLUME\{C82A81B8-5A4F-11E0-AACC-806E6F6E6963}#0000000000100000: Generic volume PCI\VEN_1180&DEV_0822&SUBSYS_9025104D&REV_21\4&1BD7BFCD&0&22F0: SDA Standard Compliant SD Host Controller ROOT\LEGACY_FVEVOL\0000 : Bitlocker Drive Encryption Filter Driver PCI\VEN_1180&DEV_0832&SUBSYS_9025104D&REV_04\4&1BD7BFCD&0&21F0: Ricoh 1394 OHCI Compliant Host Controller Now going to search for drivers for that.

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• subneting .. is 192.168.0.1/24 different than 192.168.0.1/25

  - by SM

  So i am trying to understand subnetting. I understand that you can take 192.168.0.0/24 domain and break it up in 2 subnets. 192.168.0.0/25 and 192.168.0.128/25 .. so what if i need to create 2 more subnets inside both of those above subnets. What if i need to create 2 subnets, which have 2 more subnets inside them and each of those 2 subnets have 2 hosts. As per my calculation, this would be something like. top 2 subnets: 192.168.0.0/25 and 192.168.0.128/25 subnets of 192.168.0.0/25: 192.168.0.0/26 - 192.168.0.128/26 subnets of 192.168.0.128/25: 192.168.0.128/26 - 192.168.0.192/26 hosts of 192.168.0.0/25: 192.168.0.1/25 - 192.168.0.2/25 hosts of 192.168.0.128/25: 192.168.0.129/25 - 192.168.0.130/25 hosts of 192.168.0.0/26: 192.168.0.1/26 - 192.168.0.2/26 hosts of 192.168.0.128/26: 192.168.0.129/26 - 192.168.0.130/26 hosts of 192.168.0.128/26: 192.168.0.129/26 - 192.168.0.130/26 hosts of 192.168.0.192/26: 192.168.0.193/26 - 192.168.0.194/26 The above doesnt seem right, i am moving down like a tree, however the subnet mask and IPs are being repeated, i am just add 1 to /x and making the ips from there. Can anyone please tell me if this is correct The scenario i am trying to understand is similar to this, however i just want to add hosts on each level as well. http://www.ciscotrick.com/wp-content/uploads/2008/08/the_mathematical_relationship_between_network_block_sizes.jpg

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• Linked server problem on SQL Server 2005

  - by BradyKelly

  I have a weird issue and I hope someone can steer me in the right direction for resolving this please. When I execute the following query against a linked server, I get the following error. I can connect to the server in SSMS as a separate server, and execute a similar query against its Deposits table. The nn.nn is my own replacement to avoid broadcasting our server addresses. The query: select td.Batch , td.DateTimeDeposited from Deposits cd left join [172.nn.nn.32\sqlexpress].Terminal.dbo.Deposits td on cd.DateTimeDeposited = td.DateTimeDeposited The error: OLE DB provider "SQLNCLI" for linked server "172.nn.nn.11\sqlexpress" returned message "Login timeout expired". OLE DB provider "SQLNCLI" for linked server "172.nn.nn.11\sqlexpress" returned message "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.". Msg 65535, Level 16, State 1, Line 0 SQL Network Interfaces: Error Locating Server/Instance Specified [xFFFFFFFF]. Notice how the error is about server 172.nn.nn.11 and not 172.nn.nn.32. SOLVED (STUPID ME): Somebody had added an extra bit to my query that was scrolled off-screen and was querying the 17.nn.nn.11 server.

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• Windows 7 XP Mode disable time sync

  - by Oskar Duveborn

  So I've tried the trick from Virtual PC 2007, adding the following section to the vmc configuration file: <components> <host_time_sync> <enabled type="boolean">false</enabled> </host_time_sync> </components> Later someone suggested VPC doesn't want the components level so added this instead: <host_time_sync> <enabled type="boolean">false</enabled> <frequency type="integer">15</frequency> <threshold type="integer">10</threshold> </host_time_sync> When I start up XP Mode (Microsoft Virtual PC) it completely ignores any of these two configuration changes and if I change the clock it's instantly reset to the host time again. I've also obviously disabled the Windows Time service but as it's not joined to a domain or set up with a source it shouldn't be involved anyway. I need to test an application over a few midnight passes and thought the XP Mode machine would be perfect, so I didn't have to mess with my workstation clock... is there any way to get the VPC guest to not sync time with the host? This is easy in Hyper-V ;p

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• Performance analytics via DBMS "plugins", or other solution

  - by Polynomial

  I'm working on a systems monitoring product that currently focuses on performance at the system level. We're expanding out to monitoring database systems. Right now we can fetch simple performance information from a selection of DBMS, like connection count, disk IO rates, lock wait times, etc. However, we'd really like a way to measure the execution time of every query going into a DBMS, without requiring the client to implement monitoring in their application code. Some potential solutions might be: Some sort of proxy that sits between client and server. SSL might be an issue here, plus it requires us to reverse engineer and implement the network protocol for each DBMS. Plugin for each DBMS system that automatically records performance information when a query comes in. Other problems include "anonymising" the SQL, i.e. taking something like SELECT * FROM products WHERE price > 20 AND name LIKE "%disk%" and producing SELECT * FROM products WHERE price > ? AND name LIKE "%?%", though this shouldn't be too difficult with some clever parsing and regex. We're mainly focusing on: MySQL MSSQL Oracle Redis mongodb memcached Are there any plugin-style mechanisms we can utilise for any of these? Or is there a simpler solution?

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