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  • DataContext Doesn't Exist in Dynamic Data Project?

    - by davemackey
    This is really annoying...and I know it is something extremely simple... 1. I create a new Dynamic Data project. 2. I add a LINQ-to-SQL class and drag and drop some tables onto the class. 3. I open the global.asax.vb and uncomment the line: DefaultModel.RegisterContext(GetType(YourDataContext), New ContextConfiguration() With {.ScaffoldAllTables = True}) I remove YourDataContext and replace it with the DataContext from my LINQ-to-SQL class: DefaultModel.RegisterContext(GetType(NorthwindDataContext), New ContextConfiguration() With {.ScaffoldAllTables = True}) I then try to debug/build/etc. and receive the following error: Type 'NorthwindDataContext' is not defined Why is it not defined? It seems like its not recognizing I created the DBML file.

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  • MySQL Connection Error with JSP

    - by voidmain
    Hello, I am trying to connect to mysql database from jsp page. The connection code is as below InitialContext ic=new InitialContext(); DataSource ds=(DataSource)ic.lookup("jdbc:mysql://localhost:3306/"); Connection con=ds.getConnection(); Statement stmt = con.createStatement(); when i open the page i get the following error javax.servlet.ServletException: javax.naming.NamingException: Lookup failed for 'jdbc:mysql://localhost:3306/' in SerialContext [Root exception is javax.naming.NameNotFoundException: jdbc:mysql:] can some one please tell me what is wrong with this...

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  • Getting \ building latest NHibernate build

    - by Alex Yakunin
    I'd like to get the latest NHibernate build or build it by my own. The build available at SourceForge is dated by Nov 2009, although I see there was a lot of activity later, especially related to LINQ development. So what is the best option? I can: Get the latest source code and try to build it. Are there any instructions for this? Get one of latest builds shared by someone else. Are there any people maintaining such builds? Please note, that I'm not interested in 8-month old builds - I need the latest code for tests (LINQ, performance). I know there is a similar question, but it looks like top answers there are outdated.

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  • MySQL: Functional Partitioning

    This article contains common different methods of functional partitioning and common considerations for database setup and capacity. Company DBAs, database developers, engineers and architects should consider the pros and cons of any method of sharding or partitioning since compromises will have to be made given the pros and cons of a system setup.

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  • MySQL: Functional Partitioning

    This article contains common different methods of functional partitioning and common considerations for database setup and capacity. Company DBAs, database developers, engineers and architects should consider the pros and cons of any method of sharding or partitioning since compromises will have to be made given the pros and cons of a system setup.

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  • how to split data using mysql [closed]

    - by user75238
    I want to display images on left side and right side on my website. For example in this code I have 8 images and I want to split them 4 on the left side and 4 on the right side. In between them I want to put text. How can I do this? $display_image2=mysql_query("select id_topic,topic_title,image2 from topics where image2 not like '' order by id_topic desc limit 8")or die (mysql_error()); This is an image clarify what I want to do: http://oi50.tinypic.com/wsok1t.jpg

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  • FTP Error: 550 Cant change directory to /: Permission denied

    - by Alessandro Merletti de Palo
    I installed Pureftpd and Ispconfig3 on my server. Starting from the point I'll probably uninstall ispconfig3 and make things directly on the server, now I am so stubborn I really want to see where's the problem. I created a ftp user through ispconfig, named amdpftp. It is related to a server user named web7. It logs in with username and password, but if i try to ls, it tells me: FTP Error: 550 Cant change directory to /: Permission denied I thought many things, like: 1. It is a problem of permissions. I went to /var/www/clients/client0/web7 , it was immutable and owned by root. Chattr -i and chown web7:client0 changed permissions, but with no effect. I restored to root:root, and made it immutable again. 2. I make some mistakes in the pureftpd installation: Wrong, it works pretty fine. The pureftpd.log doesn't seem to say anything bad. 3. The pureftpd.log file is only the pureftpd one, I should also check the mysqld functionality, as it is in a mysql database that user, password and working directory are stored. I enabled logging in the my.cnf, but also in the ispconfig database operation there wasn't anything wrong. Then I mkdir testftp in /var/www, chown web7:client0, and edited amdpftp user root directory from /var/www/clients/client0/web7 into /var/www/testftp . Guess what? It worked. So, now I know: 1. The PureFtpd works pretty fine 2. The mysql ispconfig database as well 3. The username and password of the virtual user created by ispconfig into pureftpd work 4. The correlation between username and password and the user web7 and the group client0 does work. What kind of magic has been cast upon the ispconfig directories [/var/www/clients/*] that block ftpusers to operate?

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  • Importing XML into an AWS RDS instance

    - by RoyHB
    I'm trying to load some xml into an AWS RDS (mySql) instance. The xml looks like: (it's an xml dump of the ISO-3661 codes) <?xml version="1.0" encoding="UTF-8"?> <countries> <countries name="Afghanistan" alpha-2="AF" alpha-3="AFG" country-code="004" iso_3166-2="ISO 3166-2:AF" region-code="142" sub-region-code="034"/> <countries name="Åland Islands" alpha-2="AX" alpha-3="ALA" country-code="248" iso_3166-2="ISO 3166-2:AX" region-code="150" sub-region-code="154"/> <countries name="Albania" alpha-2="AL" alpha-3="ALB" country-code="008" iso_3166-2="ISO 3166-2:AL" region-code="150" sub-region-code="039"/> <countries name="Algeria" alpha-2="DZ" alpha-3="DZA" country-code="012" iso_3166-2="ISO 3166-2:DZ" region-code="002" sub-region-code="015"/> The command that I'm running is: LOAD XML LOCAL INFILE '/var/www/ISO-3166_SMS_Country_Codes.xml' INTO TABLE `ISO-3661-codes`(`name`,`alpha-2`,`alpha-3`,`country-code`,`region-code`,`sub-region-code`); The error message I get is: ERROR 1148 (42000): The used command is not allowed with this MySQL version The infile that is referenced exists, I've selected a database before running the command and I have appropriate privileges on the database. The column names in the database table exactly match the xml field names.

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  • Regular issue with keys on temp tables

    - by Christian
    We run a large forum with lots of reads and writes, particularly to the posts and topics tables which are both innodb. Last week I started doing 12 hourly backups with innobackupex because mysqldump just takes forever (7+ million rows in posts table.) It seems that something doesn't like these backups because I have a recurring problem every other day. The symptoms; The front page of the site starts throwing errors The logs start showing errors like Error: 126 - Incorrect key file for table '/tmp/mysql/#sql_4e87_14.MYI'; try to repair it The /tmp/ dir fills up and we start getting Error: 1030 - Got error 28 from storage engine in the logs. The only way to fix is to optimize table on each of the posts and topics tables. I'm trying all I can to stop MySQL using disks for temp tables, but I'd have more problems than this if it used all my memory also. My my.cnf is here; https://gist.github.com/cbiggins/0aa26f6defb7a14541d7 The box has 32GB memory and I don't come near that usually. Currently at 15GB use. Thanks in advance. Update 1: Despite the conf looking like there is replication, there isn't. This is a stand alone instance.

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  • Storing changes to multiple databases in a single centralized database

    - by B4x
    The setup: multiple MySQL databases at different locations with the same scheme. The databases are in production. The motivation: we want to present information in these databases in a web interface, clearly showing which database the row originated from. We want to be able to get this data from one single source (for different reasons, one of them is pagination which gets tricky if you use multiple sources). The problem: how do we collect data from multiple databases, storing it at a central location and clearly marking the origin of each row? We have discussed using a centralized DB that tracks changes to the production DBs, with the same schema and one additional column for origin. If possible, we would like to avoid having to make changes in the production environment. Since we can't use MySQL's replication (multiple masters to a single slave isn't allowed), what are our other options? Are there any existing solutions for something like this or do we have to code something ourselves? Is the best solution to change the database schemas in production and add a column for origin? The idea of a centralized database isn't set in stone. If there is a solution to this that solves our other problems without a centralized DB, we can be flexible. Any help is much appreciated.

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  • How should I set up protection for the database against sql injection when all the php scripts are flawed?

    - by Tchalvak
    I've inherited a php web app that is very insecure, with a history of sql injection. I can't fix the scripts immediately, I rather need them to be running to have the website running, and there are too many php scripts to deal with from the php end first. I do, however, have full control over the server and the software on the server, including full control over the mysql database and it's users. Let's estimate it at something like 300 scripts overall, 40 semi-private scripts, and 20 private/secure scripts. So my question is how best to go about securing the data, with the implicit assumption that sql injection from the php side (e.g. somewhere in that list of 300 scripts) is inevitable? My first-draft plan is to create multiple tiers of different permissioned users in the mysql database. In this way I can secure the data & scripts in most need of securing first ("private/secure" category), then the second tier of database tables & scripts ("semi-private"), and finally deal with the security of the rest of the php app overall (with the result of finally securing the database tables that essentially deal with "public" information, e.g. stuff that even just viewing the homepage requires). So, 3 database users (public, semi-private, and secure), with a different user connecting for each of three different groups of scripts (the secure scripts, the semi-private scripts, and the public scripts). In this way, I can prevent all access to "secure" from "public" or from "semi-private", and to "semi-private" from "public". Are there other alternatives that I should look into? If a tiered access system is the way to go, what approaches are best?

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  • android geting data from sql

    - by sagar
    Hello i m new to android. i wont to connect to sql server for store and get data so so me one can help me sending code of android for do it.. i had tried to do tht with java nd it was workink but now i wont to create a aplication for android my java code is :: import java.sql.*; public class MysqlTest { public static void main (String[] args) { Connection conn = null; try { String userName = "pietro"; //change it to your username String password = "pietro"; //change it to your password String url = "jdbc:mysql://192.168.0.67:3306/registro"; Class.forName("com.mysql.jdbc.Driver").newInstance(); conn = DriverManager.getConnection(url, userName, password); Statement s = (Statement) conn.createStatement(); // code for create a tabel in server s.execute("create table School2 (rolno integer,sub text)"); // code for create a tabel in server s.execute("insert into School2(rolno,sub)values(10,'java')"); //code for add value in tabel s.execute("select rolno,sub from School2");//code for add value in tabel s.close(); System.out.println("Database connection established"); } catch (Exception e) { System.err.println("Cannot connect to database server"); } finally { if (conn != null) { try { conn.close (); System.out.println("Database connection terminated"); } catch (Exception e) { /* ignore close errors */ } } } } }

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  • Extremely high mysqld CPU usage with no active queries

    - by RadarNyan
    I have a VPS running Ubuntu 12.04 LTS with LEMP stack, followed the guide from Linode Library (since I'm using a Linode) to setup, and everything worked fine until now. I don't know what's wrong, but my CPU usage just goes up since a week ago. Today things getting really bad - I got 74% CPU usage so I went check and found that mysqld taking too much CPU usage (somewhere around 30% ~ 80%) So I did some Google Search, tried disable InnoDB, restart mysql, reset ntp / system clock (Isn't this bug supposed to happen more than a year ago?!) and reboot my VPS, nothing helped. Even with mysql processlist empty, I still get mysqld CPU usage very high. I don't know what I missed and have totally no idea, any advice would be appreciated. Thanks in advance. Update: I got these from running "strace mysqld" write(2, "InnoDB: Unable to lock ./ibdata1"..., 44) = 44 write(2, "InnoDB: Check that you do not al"..., 115) = 115 select(0, NULL, NULL, NULL, {1, 0}^[[A^[[A) = 0 (Timeout) fcntl64(3, F_SETLK64, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}, 0xbfa496f8) = -1 EAGAIN (Resource temporarily unavailable) hum... I did tried to disable InnoDB and it didn't fix this problem. Any idea? Update2: # ps -e | grep mysqld 13099 ? 00:00:20 mysqld then use "strace -p 13099", the following lines appears repeatedly: fcntl64(12, F_GETFL) = 0x2 (flags O_RDWR) fcntl64(12, F_SETFL, O_RDWR|O_NONBLOCK) = 0 accept(12, {sa_family=AF_FILE, NULL}, [2]) = 14 fcntl64(12, F_SETFL, O_RDWR) = 0 getsockname(14, {sa_family=AF_FILE, path="/var/run/mysqld/mysqld.sock"}, [30]) = 0 fcntl64(14, F_SETFL, O_RDONLY) = 0 fcntl64(14, F_GETFL) = 0x2 (flags O_RDWR) setsockopt(14, SOL_SOCKET, SO_RCVTIMEO, "\36\0\0\0\0\0\0\0", 8) = 0 setsockopt(14, SOL_SOCKET, SO_SNDTIMEO, "<\0\0\0\0\0\0\0", 8) = 0 fcntl64(14, F_SETFL, O_RDWR|O_NONBLOCK) = 0 setsockopt(14, SOL_IP, IP_TOS, [8], 4) = -1 EOPNOTSUPP (Operation not supported) futex(0xb786a584, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb786a580, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0xb7869998, FUTEX_WAKE_PRIVATE, 1) = 1 poll([{fd=10, events=POLLIN}, {fd=12, events=POLLIN}], 2, -1) = 1 ([{fd=12, revents=POLLIN}]) er... now I totally don't get it x_x help

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  • How to find out what is causing a slow down of the application on this server?

    - by Jan P.
    This is not the typical serverfault question, but I'm out of ideas and don't know where else to go. If there are better places to ask this, just point me there in the comments. Thanks. Situation We have this web application that uses Zend Framework, so runs in PHP on an Apache web server. We use MySQL for data storage and memcached for object caching. The application has a very unique usage and load pattern. It is a mobile web application where every full hour a cronjob looks through the database for users that have some information waiting or action to do and sends this information to a (external) notification server, that pushes these notifications to them. After the users get these notifications, the go to the app and use it, mostly for a very short time. An hour later, same thing happens. Problem In the last few weeks usage of the application really started to grow. In the last few days we encountered very high load and doubling of application response times during and after the sending of these notifications (so basically every hour). The server doesn't crash or stop responding to requests, it just gets slower and slower and often takes 20 minutes to recover - until the same thing starts again at the full hour. We have extensive monitoring in place (New Relic, collectd) but I can't figure out what's wrong; I can't find the bottlekneck. That's where you come in: Can you help me figure out what's wrong and maybe how to fix it? Additional information The server is a 16 core Intel Xeon (8 cores with hyperthreading, I think) and 12GB RAM running Ubuntu 10.04 (Linux 3.2.4-20120307 x86_64). Apache is 2.2.x and PHP is Version 5.3.2-1ubuntu4.11. If any configuration information would help analyze the problem, just comment and I will add it. Graphs info phpinfo() apc status memcache status collectd Processes CPU Apache Load MySQL Vmem Disk New Relic Application performance Server overview Processes Network Disks (Sorry the graphs are gifs and not the same time period, but I think the most important info is in there)

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  • Effects of internet connection speeds on server queries

    - by SephMerah
    Can my internet connection significantly effect queries run on phpmyadmin? I am currently 18 down and 30 up. I switched internet connections today and noticed a deep drop in query performance. The query that I am running is SELECT * FROM table. Simple. The table has one row of data. The MySQL server is on the same server as everything else. It is a VPS. Godaddy hosts. I dont have any other information. Centos 6.3 MySQL 5.1 PhpMyAdmin 3.4 Okay used google tools to inspect the XHR going out and coming in and this is what it reported. {"success":true,"message":"<div class=\"success\">Your SQL query has been executed successfully ( Query took 0.0033 sec )<\/div>","sql_query":"<div id=\"result_query\" align=\"\">\n<div class=\"success\">Your SQL query has been executed successfully ( Query took 0.0033 sec ) SNIP..................."}. So apparently my server is fine. The strange thing is though.. The returned XHR comes back exactly as soon as I execute the query on the page. It comes back within less than a second. Why PhpMyadmin does not report the change immediately. I am going to try a re-install.

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  • WAMP Installation - Multiple PHP Version Issues

    - by Pete171
    I have installed WAMP because I am attempting to modify an an application which uses Zend Optimizer (I cannot use Z.O. with PHP5.3+, which is why I decided to install WAMP). I downloaded the latest version - Wamp Server 2.1 - which comes bundled with PHP5.3.5. I then downloaded a PHP version that would be compatible with Z.O. - 5.2.9. - and a compatible Apache version, 2.0.63. My problem: PHP scripts run fine, but anything with MySQL does not work. Running the testmysql.php script returns the fatal error: Fatal error: Call to undefined function mysql_connect() in C:\wamp\www\testmysql.php on line 2". I have looked in the PHP INI files inside both PHP versions, and I'm fairly sure the relevant information is there. At least, there are parts inside that mention MySQL! Perhaps somebody could clarify exactly what information should be present? Also, when visiting a page that called phpinfo(), I noticed that the 'Loaded Configuration File' was pointing to C:\wamp\bin\php\php5.3.5\php.ini, even though I have enabled the older PHP version. I've stopped and started Apache, too, and that hasn't made a difference. Is anybody able to offer any assistance? Anything at all would be great; I'm not very good at messing around with Apache/

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  • Mysqld shutting down by itself

    - by AJ Naidas
    I'm running a Wordpress Blog that gets medium-high traffic. It is hosted in an Ubuntu Server 2GB Memory 2 Core Processor 40GB SSD Disk, 3TB Transfer. The problem is that MySQL shuts down by itself after an hour or two. I had to restart mysql each and every time this happens. I checked the logs and this is what I found: 140612 6:48:14 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead. 140612 6:48:14 [Note] Plugin 'FEDERATED' is disabled. 140612 6:48:14 InnoDB: The InnoDB memory heap is disabled 140612 6:48:14 InnoDB: Mutexes and rw_locks use GCC atomic builtins 140612 6:48:14 InnoDB: Compressed tables use zlib 1.2.3.4 140612 6:48:14 InnoDB: Initializing buffer pool, size = 1.4G InnoDB: mmap(1502412800 bytes) failed; errno 12 140612 6:48:14 InnoDB: Completed initialization of buffer pool 140612 6:48:14 InnoDB: Fatal error: cannot allocate memory for the buffer pool 140612 6:48:14 [ERROR] Plugin 'InnoDB' init function returned error. 140612 6:48:14 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 140612 6:48:14 [ERROR] Unknown/unsupported storage engine: InnoDB 140612 6:48:14 [ERROR] Aborting 140612 6:48:14 [Note] /usr/sbin/mysqld: Shutdown complete judging by this line: 140612 6:48:14 InnoDB: Fatal error: cannot allocate memory for the buffer pool I suspect that this is a memory problem, but I would like to hear from the experts here before I conclude. Is this a lack of memory problem? Do you think the value of max_connections in my.cnf (currently 100) is a potential cause and needs increasing? TIA.

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  • Ubuntu + LigHTTPd: Server requests taking ages

    - by ctrl_freak
    I've had an issue since upgrading my distro a couple of weeks ago from hardy; receiving data after making a request has increasing intervals of nothing, as you can see from the picture below. http://i49.tinypic.com/2w5lvr9.png I have since reinstalled fresh from an Ubuntu 10.04 Server (i386) disk, but am still having the same issues. I'm running on a LigHTTPd, MySQL, PHP5 stack. The surprising thing is, that local browsing using lynx is super fast, as expected. Initially, after reinstalling, I copied over the old configuration files from the previous installation, but have since reinstalled LigHTTPd and rebuilt the config file from scratch. The only correlation I could find, was that I attempted installation of ionCube and Zend Optimizer for a script I was testing, however I would think that it could no longer impact seeing I had reinstalled the OS. I have also removed Suhosin just in case, however it had no impact. I'm thinking it possibly has something to do with networking, but I wouldn't know where to start. The server is manually assigned an IP by it's MAC address on the router. The fact that the time seems to be exponential (to a point) worries me. I've tried strace'ing the LigHTTPd and MySQL processes, however I couldn't see anything obvious, not that I'd really know what I'm looking for. RAM and CPU usage don't seem to be out of the ordinary, but I can't say its perfect.. I'm hoping someone has experienced the same, or can point me in a direction, as searching has proved fruitless as I don't know anything specific. Config files can be posted, if requested.

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  • connections in FIN_WAIT and CLOSE_WAIT state

    - by Raj
    I would like to elaborate the setup so You guys can understand the question and answer more accurately. I have HAProxy as load-balancer, 4 webservers (apache 2.2.3) and one database server (MySQL 5). I am monitoring these servers by nagios. I have disabled the keepalive on apache as we have only 8GB of memory. Now what happens whenever I receive alerts for high memory and cpu utilization, I have observed that the connections from apache to database server hang in established mode (keepalive with timeout value of 7200) and at other side means connections between haproxy and apache shows status as FIN_WAIT on haproxy server and CLOSE_WAIT at apache side. I also see the huge memory swapping and apache taking the most of the memory. I did strace on apache process and did not find any information. strace gets attached to apache process but did not produce any output. The processlist on Mysql server show s those processes in sleep mode. The application on webserver is Magento a php application. if you need further information please let me know. Thanks.

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