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  • Book Review Charlene Li's New Book: Open Leadership

    - by david.talamelli
    A few weeks ago, I was surprised when I looked in our mail box. I had received an Advance Copy of Charlene Li's new book titled "Open Leadership: How Social Technology Can Transform the Way You Lead". Charlene sent a tweet a while back asking anyone interested in receiving the book to submit their details. I sent off my details and didn't think I would hear anything back, so it was a pleasant surprise. With that I almost feel bad that it has taken me 3 weeks to read her book. It took this long mainly because it has been hard to fit in some quality reading time for myself with work, the kids, volunteering, etc..... I am happy to report I have finished her book and wanted to run through my initial thoughts with you. I first came across Charlene Li after reading her book "Groundswell" a few years ago, her latest book "Open Leadership" is a follow on from Groundswell and to me it seems like a natural progression from the question "Ok the business landscape is changing, what do we do now?" For me these two books have a different writing style to them. Groundswell from memory spoke about broad social media concepts and adoption and alerted us to some of the changes taking place in the SM landscape. Open Leadership seems to be focussed on taking those broad concepts and finding ways to implement them into your environment. That is breaking broad concepts down into individual action items that can be measured and analysed. As the business world changes Leaders must change their approach and let go of control to more control. One of the things I love reading about is seeing real life examples of how people and organisations are making these things happen. In this book Charlene has collected some great collateral and case studies from companies such as Cisco, Best Buy, The Red Cross and The State Bank of India (as a side-note, I wish now that I submitted my input for the Leaders I work with here at Oracle - there are some great examples here of people who empower their staff). As society becomes more adept at using social media it is inevitable that Leaders must become open with their employees, clients and partners. From the book some of the key points I took away are (I actually took away a lot more from this book, this is just an overview) : 1) Organisations should encourage risk taking. Without being a "hacker", how can we improve ourselves, our processes, our business, etc... The old saying you only fail by not trying applies here. If Leaders create a culture where people are afraid to stick their neck out - how will you innovate? 2) Leaders need to lead by example - if you want to promote an open and transparent business, a Leader needs to exemplify the traits they would like to see out of their employees. 3) The definition of a Leader is changing, open leadership is about being a catalyst to change that uses networks to spread a vision as opposed to traditional leadership that is viewed as a role. 4) There is a cultural and business shift taking place. Information is more wide-spread and is being disseminated faster than any other time in the past. Leaders who are open and transparent will thrive in this new business environment. 5) Leadership is not defined by a title - it is defined by a person's actions. Also anyone can be a Leader or has Leadership potential in them- it is a matter of drawing that out of people. I found this book useful and I also found myself looking at my own actions and the actions of others around me (including my management) to see how open and transparent I am in my work. For me I am glad I read this book as it validated my own thoughts of the changes we are seeing take place. This book has certainly given me some new ideas and helped me push my own boundaries of what I can do. The book has a number of action plans at the end of some of the chapters such as "Conducting you Openness Audit" that I think have helped me take thoughts and ideas and turn them into concrete action items. I have included a link to the introduction of the book here if anyone wants to have a read of it. If anyone else has read this book, it would be great to hear your thoughts/comments/review. Leave your comments below. This article was originally posted on David Talamelli's Blog - David's Journal on Tap

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  • Oracle's Australian Graduate Recruitment Program

    - by david.talamelli
    I have been with Oracle for 5 years now and one thing that I have found that there is never a shortage of here is - Variety. Over the last 5 years I have had the opportunity to work on projects across various countries, across various technologies and skill-sets and also across various level of seniority. No two days are the same. One of the projects I was fortunate to be involved in occurred last year and it is one of the ones that is closest to me. Last year I was able to take responsibility for our 2011 Graduate Recruitment drive in Australia. Two weeks ago I went to Sydney to meet our Graduates who started in February 2011 with us and it was great to see them come to the end (or beginning actually) of our journey together. I am excited at the potential of what our Graduates careers will develop into here with us. I remember at our interviewing last year trying to explain life in Oracle, it is great to see those same Graduates with us now learning and developing life and business skills that I hope they will take with them in their professional careers. I was talking to one of my colleagues this week who mentioned the excitement and energy that our new Graduates bring is infectious, and I agree it really is. Our Graduates have a big learning curve ahead of them and they are about to start going on rotations into some of our Business Groups - but I think it is a great experience to see how a global company operates and pulls together to achieve results together. Here is a picture we took the other week of this year's Oracle Graduates (if any of our Graduates are reading this blog - it was great seeing you in NSW and I do wish you all the success here at Oracle) Once again Oracle's Graduate Program will be running in 2011 in Australia (Graduates will start in Jan/Feb 2012). The Oracle Australia Graduate Development Program is a one-year program consisting of orientation, formal training, project rotations in one core line of business and finally job placement. The formal training is a combination of structured development programs on soft skills and functional competencies via various delivery formats. Graduates are also expected to work in a team environment and complete multiple projects addressing real business challenges and at the time gaining a broad business understanding. For our Australia program we are hiring in our North Ryde and Melbourne offices. Resume submissions are being accepted now. First Round interviews will take place in June 2011 with Final Round interviews in July 2011. The Australia Graduate Program is open to Australian Residents and Citizens who are either in the final year of their studies or have graduated the previous year. For more details on Oracle and our Graduate Program visit our Campus website To express your interest, mail your resume to [email protected]

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  • Interviews Gone Bad.....Now What Do I Do?

    - by david.talamelli
    We have all done it at some stage of our working careers - you know those times when you leave an interview and then you think to yourself "why didn't I ask that question" or "I can't believe I said that" or "how could I have forgotten to say that". It happens to everyone but how you handle things moving forwards could be critical in helping you land that dream job. There is nothing better than seeing that dream job with the dream company that you are looking to work for advertised (or in some cases getting called by the Recruiter to let you know about that job). The role may seem perfect and it could be just what you are looking for and it is with the right company as well. You have sent in your resume and have subsequently had one, two or maybe three interviews for the role. After each step of the process you get a little bit more excited about the role as you start to think about your work day in your new role/company. Then it happens, you get it: you get The Phone Call to inform you that you have not been successful in securing the position that you have invested so much time and effort into. It can be disappointing to hear this news but what you do next is important in potentially keeping that door open for future opportunities with that company. How you handle yourself in this situation is important: if any of you remember the Choose Your Own Adventure Books do you: Tell the Recruiter (maybe get aggressive) they are wrong in their assessment and that you are the right candidate for the role Switch off and say ok thanks and hang up without engaging in any further dialogue Thank the company for their time and enquire if there may be any other opportunities in the future to explore If you chose the first option - the company in question may consider whether or not to look at you for other opportunities. How you handle yourself in the recruitment process could be an indication of how you would deal with clients/colleagues in your role and the impression that you leave a potential employer may be what sticks in their mind when they think of you (eg: isn't that the person who couldn't handle it when we told him he wasn't right for our role). The second option potentially produces a similar outcome. If you rush to get off the phone, the company may come back to you to talk about other roles when they come up, but you also leave open the potential thought with the company you were only interested in that role and therefore not interested in any other opportunities. Why take the risk of the company thinking that and potentially not getting back to you in the future. By picking the third option, you actively engage with the company and keep the dialogue open for future discussions. Ok, so you didn't get the role you interviewed for - you don't know who else the company may have been interviewing - maybe they found someone who was a better fit, or maybe there were too many boxes you didn't tick to step straight into that specific role. Take a deep breath and keep the company engaged. You are fresh in their mind - take advantage of that fact and let them know that while you respect their decision, that you are still interested in the company and would like to be kept in mind for future roles. Ask if it is ok to keep in touch and when they would like to keep in touch, as long as you are interested let them know you are still interested. You do need to balance that though if you come across as too keen or start stalking people - it could equally damage your brand. Companies normally have more than one open role. New roles are created all the time, circumstances change and hiring people is not a static business, it changes course from everyone's best laid initial plans. If you didn't get that initial role you wanted, keep the door open with that company so that when those new roles do come up or when circumstances do change you have already laid the ground to step into those new positions.

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  • Your Job Search Should be More Than Just a New Year's Resolution

    - by david.talamelli
    I love the beginning of a new year, it is a great chance to refocus and either re-evaluate goals you are working to or even set new ones. I don't have any statistics to measure this but I am sure that one of the more popular new year's resolutions in the general workforce is to either get a new job or work to further develop one's career. I think this is a good idea, in today's competitive work force people should have a plan of what they want to do, what role they are after and how to get there. One common mistake I think many people make though is that a career plan shouldn't be a once a year thought. When people finish with the holiday season with their new year's resolution to find a new job fresh in their mind, you can see the enthusiasm and motivation a person has to make something happen. Emails are sent, calls are made, applications are made, networking is happening, etc..... Finding the right role that you are after however can be difficult, while it would be great if that dream role was available just at the time you happened to be looking for it - in reality this is not always the case. Job Seekers need to keep reminding themselves that while sometimes that dream job they are after is available at the same time they are looking, that also a Job search can be a difficult and long process. Many people who set out with the best of intentions in January to find a new job can soon lose interest in a job search if they do not immediately find a role. Just like the Christmas decorations are put away and the photos from New Year's are stored away - a Job Seeker's motivation may slowly decrease until that person finds themselves 12 months later in the same situation in same role and looking for that new opportunity again. Rather than just "going for it" and looking for a role in the month of January, a person's job search or career plan should be an ongoing activity and thought process that is constantly updated and evaluated over the course of the year. It can be hard to stay motivated over an extended period of time, especially when you are newly motivated and ready for that new role and the results are not immediate. Rather than letting your job search fall down the priority list and into the "too hard basket" a few ideas that may keep your enthusiasm fresh Update your resume every 6 months, even if you are not looking for a job - it is easy to forget what you have accomplished if you don't keep your details updated. Also it is good to be prepared and have a resume ready to go in case you do get an unexpected phone call for that 'dream job' you have been hoping for. Work out what you want out of your next role before you begin your job search - rather than aimlessly searching job ads or talking to people - think of the organisations or type of role you would like before you search. If you know what you are looking for it will be much easier to work out how to get there than if you do not know what you want. Don't expect immediate results once you decide to look for another job, things don't always fall into place. Timing and delivery can be important pieces of being selected for a role, companies don't hire every role in January. Have an open mind - people you meet or talk to may not result in immediate results for your job search but every connection may help you get a bit closer to what you are after . These actions will not guarantee a positive result, but in today's competitive work force every little of extra preparation and planning helps. All the best for 2011 and I hope your career plan whatever it may be is a success.

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  • The 2010 JavaOne Java EE 6 Panel: Where We Are and Where We're Going

    - by janice.heiss(at)oracle.com
    An informative article, based on a 2010 JavaOne (San Francisco, California) panel session, surveys a variety of expert perspectives on Java EE 6.The panel, moderated by Oracle's Alexis Moussine-Pouchkine, consisted of:* Adam Bien, Consultant Author/ Speaker, adam-bien.com* Emmanuel Bernard, Principal Software Engineer, JBoss by Red Hat,* David Blevins, Senior Software Engineer, and co-founder of the OpenEJB project and a     founder of Apache Geronimo* Roberto Chinnici, Technical Staff Consulting Member, Oracle* Jim Knutson, Java EE Architect, IBM* Reza Rahman, Lead Engineer, Caucho Technology, Inc.,* Krasimir Semerdzhiev, Development Architect, SAP Labs BulgariaThe panel addressed such topics as Platform and API Adoption, Contexts and Dependency Injection (CDI), Java EE vs. Spring, the impact of Java EE 6 on tooling and testing, Java EE.next, along with a variety of audience questions. Read the entire article for the whole picture.

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  • NorthWest Arkansas TechFest

    - by dmccollough
    David Walker is taking Tulsa TechFest on the road to NorthWest Arkansas When Thursday, July 8th 2010 Where Center for Nonprofits @St. Mary’s 1200 West Walnut Street Rogers, Ar 72756 479-936-8218 Map it with Bing! What is NorthWest Arkansas TechFest ? It is a technical conference with a primary focus to provide training/teaching sessions that are immediately beneficial to the broadest range of IT professionals in their day-to-day jobs. We can accomplish this with numerous national and international speakers delivering 75 minute sessions. A charitable non-profit event organized by local area volunteers. Even though it its a free event, we ask that you support the community and PLEASE bring TWO CANS or TWO BUCKS. All canned food will be donated to the NWA Food Bank and all proceeds will be donated to the The Jones Center. Since our first event in the Tulsa area back in 1996, many other communities have been following our example by hosting their own TechFest events: Vancouver TechFest, Houston TechFest, Dallas TechFest, Alberta TechFest and Indy TechFest. We are very PROUD to now bring the event to NorthWest Arkansas! Who should Attend? Every IT Professional IT Job seekers and IT Recruiters and Hiring Managers Developers of all languages Graphic and Web Designers Infrastructure, IT and System Administrators eMarketing Professionals Project Managers Compliance Managers IT Directors and Mangers Chief Compliance Officers Chief Security Officers CIOs/CTOs CEOs/Executive Officers With this many hours of training, anyone in the or wanting to get into the IT Industry will definitely find interesting and instructional presentations by professional speakers. Want to keep informed? More information can be found here.

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  • EC2 instance store cloning or to ebs via guy management console

    - by devnull
    I have found similar questions here but the answer are either outdated or are from the command line. The case is this. I have an EC2 instance using instance store (this was the only AMI available for Debian 6 in Ireland). Now through the AWS GUI I can do a snapshot of the instance volume and/or even create a volume. But an image made from the snapshot doesn't boot. What is the best solution to either clone an EC2 instance that uses instance store OR from the created snapshot of the instance store to launch a new EBS instance (identical clone) FROM the gui aws management console and not command line ? Before turning this down consider that there is not similar question on how to do it via the aws management console. hint can't be done is not an appropriate answer. As you can create a snapshot of the instance store backed instance and/or a volume and create an AMI from that snapshot.

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  • How do I deselect grid row when grouping in David Poll's silverlight CollectionPrinter

    - by kpg
    I'm using David Poll's CollectionPrinter and modifications by Fama to perform grouping. I'm using the control to print a datagrid with grouping and it works well if not a little slow. Problem: When the grid is displayed the first row of the grid is selected and the first cell of the row is also selected. I want to either deselect the row or change the datagrid template to make selected rows/cells appear as not selected. I tried to specify a grid template to change the row/cell selection appearance but when I added the default template I got a COM error of all things - anyway I concluded that what I was doing was not compatible with the SLab libraries, or perhaps because the grid was specified in a datatemplate. In any case I abandoned that approach. Since I have the SLab source if I understood it more there may be a way to deselect the row after from that side of things - but I know the SLaB CommectionPrinter does not rely on the data template to be a grid, so I'm not sure how to modify the code to accomplish what I want. Question: How can I prevent the row from being selected or deselect it once it is or change the appearance of the selectd row when using the CollectionPrinter with grouping? Note that the row selection problem may occur without grouping as well, I don;t know, but it definatly does with grouping.

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  • interview questions for a 7 year Exp Guy?

    - by harigm
    What kind of approach I(5 Years Exp In Java J2ee Platform) need to follow to interview 8 years exp Guy in Java and J2ee technology. I am asking all the basic questions, where he is able to answer, if he is atleast the bookish knowledge. I want to ask some thing different where we can check his actual skills in technical. Can any one help me with some thoughts where i can use to get some good and technical challenging questions to ask?

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  • List of resources for database continuous integration

    - by David Atkinson
    Because there is so little information on database continuous integration out in the wild, I've taken it upon myself to aggregate as much as possible and post the links to this blog. Because it's my area of expertise, this will focus on SQL Server and Red Gate tooling, although I am keen to include any quality articles that discuss the topic in general terms. Please let me know if you find a resource that I haven't listed! General database Continuous Integration · What is Database Continuous Integration? (David Atkinson) · Continuous Integration for SQL Server Databases (Troy Hunt) · Installing NAnt to drive database continuous integration (David Atkinson) · Continuous Integration Tip #3 - Version your Databases as part of your automated build (Doug Rathbone) · How the "migrations" approach makes database continuous integration possible (David Atkinson) · Continuous Integration for the Database (Keith Bloom) Setting up Continuous Integration with Red Gate tools · Continuous integration for databases using Red Gate tools - A technical overview (White Paper, Roger Hart and David Atkinson) · Continuous integration for databases using Red Gate SQL tools (Product pages) · Database continuous integration step by step (David Atkinson) · Database Continuous Integration with Red Gate Tools (video, David Atkinson) · Database schema synchronisation with RedGate (Vincent Brouillet) · Database continuous integration and deployment with Red Gate tools (David Duffett) · Automated database releases with TeamCity and Red Gate (Troy Hunt) · How to build a database from source control (David Atkinson) · Continuous Integration Automated Database Update Process (Lance Lyons) Other · Evolutionary Database Design (Martin Fowler) · Recipes for Continuous Database Integration: Evolutionary Database Development (book, Pramod J Sadalage) · Recipes for Continuous Database Integration (book, Pramod Sadalage) · The Red Gate Guide to SQL Server Team-based Development (book, Phil Factor, Grant Fritchey, Alex Kuznetsov, Mladen Prajdic) · Using SQL Test Database Unit Testing with TeamCity Continuous Integration (Dave Green) · Continuous Database Integration (covers MySQL, Perason Education) Technorati Tags: SQL Server,Continous Integration

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  • Interview de David Booth et Jevgeni Kabanov de la société ZeroTurnaround au sujet de JRebel, leur ou

    Bonjour, David et Jevgueni, de la société ZeroTurnaround, éditeur de l'outil de productivité JRebel pour le développement Java, ont accepté de répondre à nos questions sur leur société et leur produit phare. Retrouvez l'interview en ligne : http://java.developpez.com/interview...around/jrebel/ Y-a-t'il d'autres questions que vous auriez aimé soumettre à ZeroTurnaround ? Voir aussi : ZeroTurnaroun...

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  • As a code monkey, how to discuss programming with a guy who almost has a doctorate in computer science

    - by Peter Turner
    A friend of my wife's is coming over for dinner tonight and he is a lot smarter than me. What do we have in common, well... A Bachelor's in Computer Science, and that should be enough of a conversation starter. But he's nearly completed his doctoral studies and is light years ahead of me in his particular area, which I find fascinating but don't have any legit reason to care about (except for maybe a better way through heavy traffic - he's a combinatorics guy specializing in that I think) and I got married and had some kids and am a professional programmer for medical records software. We've got a lot in common, but there's a point where neither of us care or understand each other - although I really want to learn from him and I'm not certain he'd even want to talk about his work. So for all you doctors or code monkeys, what's a good conversation starter!

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  • How do I become a programmer and not some guy that can type some C?

    - by Phoxxent
    From what I understand, programming has a lot more to it than learning syntax, that it involves an understanding of what happens under-the-hood and even more. Currently, I am just a guy that can pump out a few loops in Python or C and maybe make a small-scope Zork clone as the hight of skill. So, what can I do to become an actual programmer? How can I find out what I need to know and learn it? I know this has been vaguely asked before, but I kind of want an answer of how as opposed to the whats that I have seen. Would it be nice to know how real programmers define being a programmer? yes. Is that going to actually help me (or anyone else) learn what they need to learn? no. (well, maybe.)

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  • How do I protect my company from my IT guy?

    - by Jesse
    I'm going to hire an IT guy to help manage my office's computers and network. We're a small shop, so he'll be the only one doing IT. Of course, I'll interview carefully, check references, and run a background check. But you never know how things will work out. How do I limit my company's exposure if the guy I hire turns out to be evil? How do I avoid making him the single most powerful person in the organization?

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  • Apache: domains working fine, subdomains not working anymore

    - by David Lawson
    Hi there, I'm not sure when, but suddenly subdomains aren't working on my server. e.g. www.davidlawson.co works, but david.lawson.co isn't working. <VirtualHost 173.203.109.191:80> ServerAdmin [email protected] ServerName david.lawson.co ServerAlias davidlawson.co ServerAlias www.davidlawson.co DocumentRoot /var/www/lawson/david <Directory /var/www/lawson/david/> Options -Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ErrorLog /var/log/apache2/lawson/david/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/lawson/david/access.log combined </VirtualHost> Any suggestions on how to debug this further, or what the problem might be?

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  • t-sql i am transforming data

    - by João Pedro Portelinha
    I am transforming data from this legacy table: MovTime (IdMov INT, IdPerson NVARCHAR(20), Date1 datetime, Type1 nvarchar(30) ) IdMov IdPerson Date1 Type ----------- -------------------- ----------------------- ------------------------------ 1 David 2012-06-01 09:00:00.000 Entered 2 David 2012-06-01 12:30:00.000 Exit 3 David 2012-06-01 14:00:00.000 Entered 4 David 2012-06-01 18:30:00.000 Exit 5 Kim 2012-06-02 09:00:00.000 Entered 6 Kim 2012-06-02 12:00:00.000 Exit ... I want the result to be the following: IdPerson Data Total Time ---------- ---------- ---------- David 2012-06-01 08:00:00 Kim 2012-06-02 03:00:00 T-SQL declare @WK_TABLE TABLE (IdMov INT, IdPerson NVARCHAR(20), Date1 datetime, Type1 nvarchar(30)) Insert into @WK_TABLE values(1,'David', '2012-06-01 09:00', 'Entered') Insert into @WK_TABLE values(2,'David', '2012-06-01 12:30', 'Exit') Insert into @WK_TABLE values(3,'David', '2012-06-01 14:00', 'Entered') Insert into @WK_TABLE values(4,'David', '2012-06-01 18:30', 'Exit') Insert into @WK_TABLE values(5,'Kim', '2012-06-02 09:00', 'Entered') Insert into @WK_TABLE values(6,'Kim', '2012-06-02 12:00', 'Exit') select * from @WK_TABLE Can someone help me?

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  • Session memory – who’s this guy named Max and what’s he doing with my memory?

    - by extended_events
    SQL Server MVP Jonathan Kehayias (blog) emailed me a question last week when he noticed that the total memory used by the buffers for an event session was larger than the value he specified for the MAX_MEMORY option in the CREATE EVENT SESSION DDL. The answer here seems like an excellent subject for me to kick-off my new “401 – Internals” tag that identifies posts where I pull back the curtains a bit and let you peek into what’s going on inside the extended events engine. In a previous post (Option Trading: Getting the most out of the event session options) I explained that we use a set of buffers to store the event data before  we write the event data to asynchronous targets. The MAX_MEMORY along with the MEMORY_PARTITION_MODE defines how big each buffer will be. Theoretically, that means that I can predict the size of each buffer using the following formula: max memory / # of buffers = buffer size If it was that simple I wouldn’t be writing this post. I’ll take “boundary” for 64K Alex For a number of reasons that are beyond the scope of this blog, we create event buffers in 64K chunks. The result of this is that the buffer size indicated by the formula above is rounded up to the next 64K boundary and that is the size used to create the buffers. If you think visually, this means that the graph of your max_memory option compared to the actual buffer size that results will look like a set of stairs rather than a smooth line. You can see this behavior by looking at the output of dm_xe_sessions, specifically the fields related to the buffer sizes, over a range of different memory inputs: Note: This test was run on a 2 core machine using per_cpu partitioning which results in 5 buffers. (Seem my previous post referenced above for the math behind buffer count.) input_memory_kb total_regular_buffers regular_buffer_size total_buffer_size 637 5 130867 654335 638 5 130867 654335 639 5 130867 654335 640 5 196403 982015 641 5 196403 982015 642 5 196403 982015 This is just a segment of the results that shows one of the “jumps” between the buffer boundary at 639 KB and 640 KB. You can verify the size boundary by doing the math on the regular_buffer_size field, which is returned in bytes: 196403 – 130867 = 65536 bytes 65536 / 1024 = 64 KB The relationship between the input for max_memory and when the regular_buffer_size is going to jump from one 64K boundary to the next is going to change based on the number of buffers being created. The number of buffers is dependent on the partition mode you choose. If you choose any partition mode other than NONE, the number of buffers will depend on your hardware configuration. (Again, see the earlier post referenced above.) With the default partition mode of none, you always get three buffers, regardless of machine configuration, so I generated a “range table” for max_memory settings between 1 KB and 4096 KB as an example. start_memory_range_kb end_memory_range_kb total_regular_buffers regular_buffer_size total_buffer_size 1 191 NULL NULL NULL 192 383 3 130867 392601 384 575 3 196403 589209 576 767 3 261939 785817 768 959 3 327475 982425 960 1151 3 393011 1179033 1152 1343 3 458547 1375641 1344 1535 3 524083 1572249 1536 1727 3 589619 1768857 1728 1919 3 655155 1965465 1920 2111 3 720691 2162073 2112 2303 3 786227 2358681 2304 2495 3 851763 2555289 2496 2687 3 917299 2751897 2688 2879 3 982835 2948505 2880 3071 3 1048371 3145113 3072 3263 3 1113907 3341721 3264 3455 3 1179443 3538329 3456 3647 3 1244979 3734937 3648 3839 3 1310515 3931545 3840 4031 3 1376051 4128153 4032 4096 3 1441587 4324761 As you can see, there are 21 “steps” within this range and max_memory values below 192 KB fall below the 64K per buffer limit so they generate an error when you attempt to specify them. Max approximates True as memory approaches 64K The upshot of this is that the max_memory option does not imply a contract for the maximum memory that will be used for the session buffers (Those of you who read Take it to the Max (and beyond) know that max_memory is really only referring to the event session buffer memory.) but is more of an estimate of total buffer size to the nearest higher multiple of 64K times the number of buffers you have. The maximum delta between your initial max_memory setting and the true total buffer size occurs right after you break through a 64K boundary, for example if you set max_memory = 576 KB (see the green line in the table), your actual buffer size will be closer to 767 KB in a non-partitioned event session. You get “stepped up” for every 191 KB block of initial max_memory which isn’t likely to cause a problem for most machines. Things get more interesting when you consider a partitioned event session on a computer that has a large number of logical CPUs or NUMA nodes. Since each buffer gets “stepped up” when you break a boundary, the delta can get much larger because it’s multiplied by the number of buffers. For example, a machine with 64 logical CPUs will have 160 buffers using per_cpu partitioning or if you have 8 NUMA nodes configured on that machine you would have 24 buffers when using per_node. If you’ve just broken through a 64K boundary and get “stepped up” to the next buffer size you’ll end up with total buffer size approximately 10240 KB and 1536 KB respectively (64K * # of buffers) larger than max_memory value you might think you’re getting. Using per_cpu partitioning on large machine has the most impact because of the large number of buffers created. If the amount of memory being used by your system within these ranges is important to you then this is something worth paying attention to and considering when you configure your event sessions. The DMV dm_xe_sessions is the tool to use to identify the exact buffer size for your sessions. In addition to the regular buffers (read: event session buffers) you’ll also see the details for large buffers if you have configured MAX_EVENT_SIZE. The “buffer steps” for any given hardware configuration should be static within each partition mode so if you want to have a handy reference available when you configure your event sessions you can use the following code to generate a range table similar to the one above that is applicable for your specific machine and chosen partition mode. DECLARE @buf_size_output table (input_memory_kb bigint, total_regular_buffers bigint, regular_buffer_size bigint, total_buffer_size bigint) DECLARE @buf_size int, @part_mode varchar(8) SET @buf_size = 1 -- Set to the begining of your max_memory range (KB) SET @part_mode = 'per_cpu' -- Set to the partition mode for the table you want to generate WHILE @buf_size <= 4096 -- Set to the end of your max_memory range (KB) BEGIN     BEGIN TRY         IF EXISTS (SELECT * from sys.server_event_sessions WHERE name = 'buffer_size_test')             DROP EVENT SESSION buffer_size_test ON SERVER         DECLARE @session nvarchar(max)         SET @session = 'create event session buffer_size_test on server                         add event sql_statement_completed                         add target ring_buffer                         with (max_memory = ' + CAST(@buf_size as nvarchar(4)) + ' KB, memory_partition_mode = ' + @part_mode + ')'         EXEC sp_executesql @session         SET @session = 'alter event session buffer_size_test on server                         state = start'         EXEC sp_executesql @session         INSERT @buf_size_output (input_memory_kb, total_regular_buffers, regular_buffer_size, total_buffer_size)             SELECT @buf_size, total_regular_buffers, regular_buffer_size, total_buffer_size FROM sys.dm_xe_sessions WHERE name = 'buffer_size_test'     END TRY     BEGIN CATCH         INSERT @buf_size_output (input_memory_kb)             SELECT @buf_size     END CATCH     SET @buf_size = @buf_size + 1 END DROP EVENT SESSION buffer_size_test ON SERVER SELECT MIN(input_memory_kb) start_memory_range_kb, MAX(input_memory_kb) end_memory_range_kb, total_regular_buffers, regular_buffer_size, total_buffer_size from @buf_size_output group by total_regular_buffers, regular_buffer_size, total_buffer_size Thanks to Jonathan for an interesting question and a chance to explore some of the details of Extended Event internals. - Mike

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  • How do I make good guy attacks only hit bad guys and vice versa?

    - by tieTYT
    My game has many different type of good guys and many different type of bad guys. They will all be firing projectiles at each other but I don't want any accidental collateral damage to occur for either alignment. So bad guys should not be able to hit/damage other bad guys and good guys should not be able to hit/damage other good guys. The way I'm thinking of solving this is by making it so that the Unit instance (this is javascript, btw), has an alignment property that can be either good or bad. And I'll only let collision happen if the class Attack boolean didAttackCollideWithTarget(target) return attack.source.alignment != target.alignment and collisionDetected(attack.source, target) This is pseudo-code, of course. But I'm asking this question because I get the sense that there might be a much more elegant way to design this besides adding yet another property to my Unit class.

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  • Can't get Passwordless (SSH provided) SFTP working

    - by Shoaibi
    I have chrooted sftp setup as below. # Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin without-password StrictModes yes AllowGroups admins clients RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* #Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes Subsystem sftp internal-sftp Match group clients ChrootDirectory /var/chroot-home X11Forwarding no AllowTcpForwarding no ForceCommand internal-sftp a dummy user root:~# tail -n1 /etc/passwd david:x:1000:1001::/david:/bin/sh Now in this case david can sftp using say filezilla client and he is chrooted to /var/chroot-home/david/. But what if i was to setup a passwordless auth? I have tried pasting his key in /var/chroot-home/david/.ssh/authorized_keys but no use, tried ssh'ing as david to the box and it just stops at "debug1: Sending env LC_CTYPE = C" after i supply it password and there is nothing shown in auth.log, may be because it can't find the homedir. If i do "su - david" as root i see "No directory, logging in with HOME=/" which makes sense. Symlink doesn't help either. I have also tried with: Match group clients ChrootDirectory /var/chroot-home/%u X11Forwarding no AllowTcpForwarding no ForceCommand internal-sftp a dummy user root:~# tail -n1 /etc/passwd david:x:1000:1001::/var/chroot-home/david:/bin/sh This way if i don't change /var/chroot-home/david to root:root sshd complains about bad ownership or permission modes, and if i do, david can no longer upload/delete anything directly in his home while using sftp from filezilla.

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  • Here's what I want... what do I tell my IT guy I need?

    - by Jason
    I work in the graphics department for a real estate brokerage, and we deal with a lot of photos. Agents take the photos, upload them to me, I touch up and standardize the photos, then I add them to an in-house server for future use by the graphics dept. I'd like to make the "sanitized" photo files available to the agents to use when they want, but I don't want the agents poking around the graphics department's files (things get misplaced, renamed and messed up in a hurry). What would be perfect is if we could create a read-only "mirror" (correct term?) of that server that could be accessed by the agents as needed, but which wouldn't feed back into our "sanitized" file system. What do I tell the office IT guy I need (platform-agnostically, because I don't know what he's running)? I never get to see him face-to-face, so I've got to word this as carefully and explicitly as possible. Thoughts? Thanks in advance for your feedback

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  • Mail Reversing (Opposite of Forwarding)

    - by Duall
    I know mail can be forwarded, e.g. mail I receive will be sent to another account. However, can the reverse be true? That mail can be sent out and be delivered to another account before being sent to it's intended address. For instance: Guy #1 sends an e-mail to Guy #2 Guy #2 gets the e-mail, and passes it on to Guy #3 as well; mail forwarded. Guy #2 sends and e-mail to Guy #1 Guy #3 receives the e-mail on its way out. If this is possible, how would I go about this on an Exhange server 2007? And what would this be called anyways? It can't be mail reversing!

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  • The illusion of Competence

    - by tony_lombardo
    Working as a contractor opened my eyes to the developer food chain.  Even though I had similar experiences earlier in my career, the challenges seemed much more vivid this time through.  I thought I’d share a couple of experiences with you, and the lessons that can be taken from them. Lesson 1: Beware of the “funnel” guy.  The funnel guy is the one who wants you to funnel all thoughts, ideas and code changes through him.  He may say it’s because he wants to avoid conflicts in source control, but the real reason is likely that he wants to hide your contributions.  Here’s an example.  When I finally got access to the code on one of my projects, I was told by the developer that I had to funnel all of my changes through him.  There were 4 of us coding on the project, but only 2 of us working on the UI.  The other 2 were working on a separate application, but part of the overall project.  So I figured, I’ll check it into SVN, he reviews and accepts then merges in.  Not even close.  I didn’t even have checkin rights to SVN, I had to email my changes to the developer so he could check those changes in.  Lesson 2: If you point out flaws in code to someone supposedly ‘higher’ than you in the developer chain, they’re going to get defensive.  My first task on this project was to review the code, familiarize myself with it.  So of course, that’s what I did.  And in familiarizing myself with it, I saw so many bad practices and code smells that I immediately started coming up with solutions to fix it.  Of course, when I reviewed these changes with the developer (guy who originally wrote the code), he smiled and nodded and said, we can’t make those changes now, it’s too destabilizing.  I recommended we create a new branch and start working on refactoring, but branching was a new concept for this guy and he was worried we would somehow break SVN. How about some concrete examples? I started out by recommending we remove NUnit dependency and tests from the application project, and create a separate Unit testing project.  This was met with a little bit of resistance because - “How do I access the private methods?”  As it turned out there weren’t really any private methods that weren’t exposed by public methods, so I quickly calmed this fear. Win 1 Loss 0 Next, I recommended that all of the File IO access be wrapped in Using clauses, or at least properly wrapped in try catch finally.  This recommendation was accepted.. but never implemented. Win 2  Loss 1 Next recommendation was to refactor the command pattern implementation.  The command pattern was implemented, but it wasn’t really necessary for the application.  More over, the fact that we had 100 different command classes, each with it’s own specific command parameters class, made maintenance a huge hassle.  The same code repeated over and over and over.  This recommendation was declined, the code was too fragile and this change would destabilize it.  I couldn’t disagree, though it was the commands themselves in many cases that were fragile. Win 2 Loss 2 Next recommendation was to aid performance (and responsiveness) of the application by using asynchronous service calls.  This on was accepted. Win 2 Loss 3 If you’re paying any attention, you’re wondering why the async service calls was scored as a loss.. Let me explain.  The service call was made using the async pattern.  Followed by a thread.sleep  <facepalm>. Now it’s easy to be harsh on this kind of code, especially if you’re an experienced developer.  But I understood how most of this happened.  One junior guy, working as hard as he can to build his first real world application, with little or no guidance from anyone else.  He had his pattern book and theory of programming to help him, but no real world experience.  He didn’t know how difficult it would be to trace the crashes to the coding issues above, but he will one day.  The part that amazed me was the management position that “this guy should be a team lead, because he’s worked so hard”.  I’m all for rewarding hard work, but when you reward someone by promoting them past the point of their competence, you’re setting yourself and them up for failure.  And that’s lesson 3.  Just because you’ve got a hard worker, doesn’t mean he should be leading a development project.  If you’re a junior guy busting your ass, keep at it.  I encourage you to try new things, but most importantly to learn from your mistakes.  And correct your mistakes.  And if someone else looks at your code and shows you a laundry list of things that should be done differently, don’t take it personally – they’re really trying to help you.  And if you’re a senior guy, working with a junior guy, it’s your duty to point out the flaws in the code.  Even if it does make you the bad guy.  And while I’ve used “guy” above, I mean both men and women.  And in some cases mutant dinosaurs. 

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  • trouble with algorithm

    - by rebel_UA
    David likes number of estimates with base "k" and not a multiple(a%2!=0) of the number of zeros at the end. Set system and the number of the order and print it I need to optimi this algoritm: class David{ private: int k; public: David(); David(int); int operator[] (int); }; David::David(){ k=10; }; David::David(int k){ this->k=k; } int David::operator[] (int n){ int q; int p; int i=1; for(int r=0;r<n;i++){ q=0; p=i; for(;;){ if(p%k) break; if(p==0) break; ++q; p/=k; } if(q%2){ r++; } } return i-1; }

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