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• Database OR Array

  - by rezoner

  What is the exact point of using external database system if I have simple relations (95% querries are dependant on ID). I am storing users and their stats. Why would I use external database if I can have neat constructions like: db.users[32] = something Array of 500K users is not that big effort for RAM Pros are: no problematic asynchronity (instant results) easy export/import dealing with database like with a native object LITERALLY ps. and considerations: Would it be faster or slower to do collection[3] than db.query("select ... I am going to store it as a file/s There is only ONE application/process accessing this data, and the code is executed line by line - please don't elaborate about locking. Please don't answer with database propositions but why to use external DB over native array/object - I have experience in a few databases - that's not the case. What I am building is a client/gateway/server(s) game. Gateway deals with all users data, processing, authenticating, writing statistics e.t.c No other part of software needs to access directly to this data/database.

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• Update mysql database with arpwatch textfile database

  - by bVector

  I'm looking to keep arpwatch entries in a mysql database to crossreference with other information I'm storing based on mac addresses. I've manually imported the arpwatch database into my mysql database, but being a novice with databases I'm not sure what the best way to continually update the database with new entries without creating duplicates would be. None of the fields can be unique, as even the time is duplicated frequently. I'm not interested in the actual arpwatch events like flip flop or new station, just the mac/ip/time pairings. Would a simple bash (or sql) shell script do the trick? Would it be possible to make the mac address plus the time be a composite key of some sort? the database is called utility, table is arpwatch, columns are mac, ip, time a seperate table named 'hosts' with columns mac, ip, type, hostname, location, notes has mac as the primary key. This table will correlate different ip addresses that a mac had over time using the arpwatch column initial import was done with MySQL Workbench using INSERT INTO commands with creative search and replace on the text file

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• Filemaker 10 Advanced sending email via script & SMTP

  - by Sean

  We are using a windows server box to run the databases but we have found via the headers that the emails are send from the local workstation. We have moved to a new email system and have set up a local linux server to securely send email out of our network to devices that do not support new protocols and encryption. But once we set up the script in filemaker 10 advanced (the local machine os x) we set it to the ip of our local box with no authentication but it does not send out an email. It creates a connection we see in the logs on the linux box but nothing more, additionally you can start a telnet connection with no issues. We have also made sure that there are no additional issue that we can see in our firewall policies. Any ideas where we should start? Does Filemaker 10 advanced log errors anywhere because I could not find any log files.

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• Database Performance Across 3 NetApp FAS2050

  - by bjd145

  I recently inherited a SQL Server 2005 box that has LUNs mounted on it from three different NetApp FAS2050 filers. The reason there are three is because the first two filers are out of space and our databases continually need more of it. What kind of performance impact (if any) does this setup have? Is it better to move the LUNs from the two other older filers to the newer one so that we have only one filer/controller for caching, etc ? This is in general. I apologize for not having more specifics.

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• Launch Apple's Stocks app, with a particular stock selected

  - by Vincent Gable

  I would like to launch Apple's Stocks app to show information for a particular stock, on a non-jailbroken phone. I'm not interesting in how to get a quote or graph a stock myself, just opening Stocks.app. I was hoping that the Stocks app would have a custom URL format, so opening a URL like stocks://AAPL would do the trick. But I haven't found anything documenting such a scheme, and suspect it doesn't exist. Any other ideas, or is it impossible to integrate with the native Stocks app?

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• PHP page load seems to be requesting itself and misinterpreting the result

  - by Regis Frey

  I'm working on a messy PHP page by another developer and I was analyzing the resource view in the Webkit developer tools and noticed that the page (index.php) makes an HTTP requests for itself and then interprets the results as an image despite it being sent with the text/html header. Because of this it throws the warning: Resource interpreted as image but transferred with MIME type text/html. Looking at the time graph the call comes after the <head> because it has already requested images for the body. Sometimes there are even two 'bad' requests. Can anyone explain what might be happening and/or suggest how to fix this? Could these be related to PHP includes?

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• Does multiple files in SQL Server when using RAID help reduce conflicts in growth and file-locking?

  - by Dr Giles M

  I've been reading around and get the impression that if you are using RAID then using multiple SQL Server files within a filegroup won't yeild any more improvements, and the benefits are purely administrative (if you started to run out of space or wanted to partition off data into managable chunks for backups/balancing the data around your big server room). However, being a reasonably savvy software person, it's not unthinkable to hypothesise that, even for smaller databases that SQL Server will perform growth and locking operations (for writes) on a LOGICAL file basis, so even if you are using RAID, it seems to make sense to have multiple files in a file group to balance I/O, or does the time taken to reconstruct the data from distributed filegroups outweigh the benefits of reduced locking? I'm also aware that the behaviour and benefits may be different for tables/indeces/log. Is there a good site that distinguishes the benefits of multiple files when RAID is already in place?

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• Connect to MS Sql 2008 on local VM

  - by Campo

  I have a test machine. Server 2008 with Hyper V MSSQL 2008 Enterprise Lets call it MACHINE A on the VM it is as well Server 2008 with another MSSQL 2008 Ent Call it VM B I setup a DB on MACHINE A then backed it up and restored following the prepare database for mirroring instructions on MSDN onto VM B. I used to be able to connect to the VM B Instance from the main test server (MACHINE A) but now I cannot for some reason. It cannot seem to find the instance at all even when I browse network databases. I can ping the VM from any computer on the network and access its shares so I know it is discoverable. Just the end of a long day maybe I am missing something here.

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• Properly Hosting Multiple Sites on VDS

  - by Aristotle

  I'm going to be moving about 7-10 websites (5-8 with Databases - MySQL) onto our new Virtual Private Server. I'm curious what the best way to host many sites on a single server is though. Do I create a directory for each site immediately within my root directory, and then point the domain names for each site to http://123.123.123.123/siteDirectory - or is there a more appropriate way to do this? I'm very interested in maintining control over how many concurent connections each site can have at any given time - would I be able to do that on the directory-level, or am I required to limit the concurrent-connections to the VPS itself?

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• How do I run AWS code on an EC2 instance?

  - by Marianna

  I just started with Amazon web services, and I have an EC2 instance. I downloaded the JAVA SDK and the Eclipse toolbox. I am able to run a sample program locally on my PC and connect to the Amazon databases, etc. My question is, what do I need to do to get this working on my EC2 instance? This may not even be specific to AWS. On Eclipse, I can just "Run as Application" and run any code. On the server side, what do I need to do? Should I ftp over my .java files? Should I export it to a jar and upload that? Do I need to install anything special to actually run it?

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• Snow Leopard: MySQL doesn't start

  - by brainfck

  Hi, I have updated to Snow Leopard and I removed mysql by following this post: http://forums.mysql.com/read.php?11,75256,255853#msg-255853 After that I have installed the mysql 64 bit community edition, but using the prefpane MySQL doesn't start. Using the terminal gives us some more informations, but I don't know how to interpret them: stefansmac:~ stefan$ cd /usr/local/mysql-5.1.42-osx10.5-x86_64/bin/ stefansmac:bin stefan$ sudo ./mysqld_safe 100105 13:56:35 mysqld_safe Logging to '/usr/local/mysql-5.0.51b-osx10.5-x86//stefansmac.local.err'. 100105 13:56:35 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql-5.0.51b-osx10.5-x86/ 100105 13:56:35 mysqld_safe mysqld from pid file /usr/local/mysql-5.0.51b-osx10.5-x86//stefansmac.local.pid ended Best regards

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• DB2 users and groups

  - by Arun Srini

  Just want to know everyone's experience and take on managing users/authentication on a multi-node db2 cluster with users groups. I have 17 apps in production (project based company, only 2 online apps), and some 30 users with 7 groups. prodsel - group that has select privilege on all tables produpdt - update group on selective tables (as required by the apps) proddel - delete prodins - insert permissions for the group Now what my company does is when an app uses certain user (called app1user), and needs select and insert privilege on a table, they 1. grant select and insert for prodsel, prodins respectively 2. add the user under those two groups... now this creates one to many relationship between user and privileges, and this app1user also gets select on other tables granted for the prodsel group. I know this is wrong. Before I explain, I need to know how this is done elsewhere. Please share your experiences, even if you use other Databases that uses OS level authentication.

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• Error 2020: Got packet bigger than 'max_allowed_packet' bytes when dumping table

  - by Imagineer

  I'm getting the above mentioned error when backing up with ZRM, which is using mysqldump for backup. mysqldump --opt --extended-insert --single-transaction --create-options --default-character-set=utf8 --user=" " -p --all-databases "/nfs/backup/mysql01/dailyrun/20091216043001/backup.sql" mysqldump: Error 2020: Got packet bigger than 'max_allowed_packet' bytes when dumping table TICKET_ATTACHMENT at row: 2286 I have increased the size for 'max_allowed_packet' to be 1G in /etc/my.cnf which is the server setting and for the client side setting I've set it by running this command: mysql -u -p --max_allowed_packet=1G And I have verified that on the client and server side they are of the same value. This is to check the client side value according to this forum posting http://forums.mysql.com/read.php?35,75794,261640 mysql SELECT @@MAX_ALLOWED_PACKET - ; +----------------------+ | @@MAX_ALLOWED_PACKET | +----------------------+ | 1073741824 | +----------------------+ 1 row in set (0.00 sec) And this is the check the server value setting. mysql SHOW VARIABLES | max_allowed_packet | 1073741824 | I have ran out of ideas, and tried searching within expert exchange and googling for solutions but so far none has worked. Reference http://dev.mysql.com/doc/refman/5.1/en/packet-too-large.html Anyone please advise, thank you.

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• enable profiler / Traceon after SQL server restart automatically

  - by Nikhil

  hi, My client is facing some deadlocks while using our application. I want to track all the deadlocks for my research and to solve the deadlocks. i am currently run the SQL profiler for the event deadlock graph to capture the deadlock scenario. the actual problem is that the SQL server gets restarted every day at 2 am, and the profiler stops capturing the events after the restart. by the time i come to office at start the profiler at say 10 am, there could be deadlocks which i could have missed between 2 am and 10 am. so i am looking for a way so i can capture the deadlocks without me starting manually. i thought i could use TRACEON(1204,-1) so that the deadlock events get captured in the SQL Server error logs. But i found that the TRACE capturing too gets disabled after the restart. Is there a way i can capture the deadlocks either by SQL profiler or by using TRACEON without me manually starting the capturing? Nikhil

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• What can cause SQL 2008 Transaction Log Shipping to stop functioning?

  - by Rick

  I read somewhere that doing a backup or when Maintenance Plan runs can cause Log Shipping to stop functioning. Is this true? What should we watch out for once our Transaction Log Shipping is in place that could stop it? A Log Shipping test we were doing between two databases on the same SQL 2008 server appeared to stop working without any error. When we checked the History of the LSRestore_* job it was always ignoring the new *.trn files. Any suggestions? Thanks.

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• How to edit CSV file without changing or formatting values (ideally in Neo/Open-Office)?

  - by Scott Saunders

  I often need to edit CSV files that will later be imported into databases. I need to reorder columns, change values, delete lines, etc. I use NeoOffice for this now - it's basically Open Office with some Mac UI stuff tweaked. Often, though NeoOffice tries to be "helpful" and reformats fields it thinks are dates, rounds numbers to some number of decimals, etc. This breaks the file import and/or changes important data values. How can I prevent this from happening? I need to edit the fields exactly as they would appear in a text editor, with absolutely no changes to the data in the fields.

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• sql and web encoding problem

  - by Marki

  Guys, I've got an encoding problem I believe. I have upgraded from phpBB2 to phpBB3. The old databases were in latin1, the new ones have utf8 encoding. Already during the upgrade process some rows of the DB were only read partly into the new version, because of strange characters as it turned out. When I use PHP's mb_convert_encoding() function to convert those strings to UTF8 they end up e.g. as 0x0093, i.e. they must have been some kind of double quotes. Even after doing this conversion, they still show up as 0x0093 in the browser (the squares with 0093 in them when the browser does not know what to display). Can someone explain the problem here? I'm a little confused and afraid I don't see all the dependencies that need to work to have the correct encodings and the correct display thereof...

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• MySQL Linked Server and SQL Server 2008 Express Performance

  - by Jeffrey

  Hi All, I am currently trying to setup a MySQL Linked Server via SQL Server 2008 Express. I have tried two methods, creating a DSN using the mySQL 5.1 ODBC driver, and using Cherry Software OLE DB Driver as well. The method that I prefer would be using the ODBC driver, but both run horrendously slow (doing one simple join takes about 5 min). Is there any way I can get better performance? We are trying to cross query between multiple mySQL databases on different servers, and this seems to be method we think would work well. Any comments, suggestions, etc... would be greatly appreciated. Regards, Jeffrey

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• Automate gdb: show backtrace every 10 ms.

  - by osgx

  Hello I want to write a script for gdb, which will save backtrace (stack) of process every 10 ms. How can I do this? It can be smth like call graph profiling for 'penniless' (for people, who can't use any sort of advanced profiler). Yes, there are a lot of advanced profilers. For popular CPUs and for popular OSes. Shark is very impressive and easy to use, but I want to get a basic functionality with such script, working with gdb.

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• Cloud Computing - Multiple Physical Computers, One Logical Computer

  - by bundini

  I know that you can set up multiple virtual machines per physical computer. I'm wondering if it's possible to make multiple physical computers behave as one logical unit? Fundamentally the way I imagine it working is that you can throw 10 computers into a facility one day. You've got one client that requires the equivalent of two computers worth, and 100 others that eat up the remaining 8. As demands change you're just reallocating logical resources, maybe the 2 computer client now requires a third physical system. You just add it to the cloud, and don't worry about sharding the database, or migrating data over to a new server. Can it work this way? If yes, why would anyone ever do things like hand partition their database servers anymore? Just add more computing resources. You scale horizontally with the hardware, but your server appears to scale vertically. There's no need to modify your application's supporting infrastructure to support multiple databases etc.

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• Cloud Computing - Multiple Physical Computers, One Logical Computer

  - by Koobz

  I know that you can set up multiple virtual machines per physical computer. I'm wondering if it's possible to make multiple physical computers behave as one logical unit? Fundamentally the way I imagine it working is that you can throw 10 computers into a facility one day. You've got one client that requires the equivalent of two computers worth, and 100 others that eat up the remaining 8. As demands change you're just reallocating logical resources, maybe the 2 computer client now requires a third physical system. You just add it to the cloud, and don't worry about sharding the database, or migrating data over to a new server. Can it work this way? If yes, why would anyone ever do things like partition their database servers anymore? Just add more computing resources. You scale horizontally with the hardware, but your server appears to scale vertically. There's no need to modify your application's infrastructure to support multiple databases etc.

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• Google Visualization legend format Jquery ui tabs

  - by Liam

  I've got an issue when using the Google Visualization api line chart with Jquery ui tabs. I've got two graphs on two tabs. The first graph, which is visible by default displays fine: the second chart on the hidden tab seems to be messing up the key: I've tried changing the options but nothing I do seems to make any difference. Here are my options: options = { 'title': title, titleTextStyle: { color: color, fontSize: 20 }, 'width': 950, 'height': 400, hAxis: { minorGridlines: { count: x } }, chartArea: { width: 880 }, legend: { position: 'bottom', textStyle: { fontSize: 10 } } }; // Instantiate and draw our chart, passing in some options. var chart = new google.visualization.LineChart(document.getElementById(divId)); chart.draw(data, options); $('#tabs').tabs(); any thoughts on what is causing this and how to prevent it?? Edit If I remove the tabs() call it displays correctly. As per answer below from @Vipul tried setting the div to a fixed width, no difference.

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• Slight network lag on Small Business Server 2008 R2

  - by Sir.Nathan Stassen

  I recently upgraded a network from a SBS 2003 server to a SBS 2008 R2 Server. Both I and users have noticed a slight delay in network applications and browsing network drives on the new server. It is minor, maybe a second or two at most. However I am wondering if anyone knows of anyway to optimize the networking to service requests sooner to the workstations. The network is running a 1 gig network with some 100 meg devices (mainly network printers). All workstations are XP SP3 Network software runs out of a shared folder mapped as a network drive, no sql databases. Server is a Dell Poweredge T610 with plenty of ram, cpu power, and storage.

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• Apple has bigger market capitalization than Microsoft

  - by Paja

  Should I worry that my Microsoft programming skills (C#, .NET, WinAPI) will be obsolete in a few years, because everybody will be using Mac OS X, iPhone OS or some other Apple-originated OS? According to reuters, Apple has now bigger market capitalization than Microsoft. I know there is probably huge speculative bubble around Apple's shares, but just look at this graph (taken from business insider): I also know Windows have currently 90% of the OS market share, so we (Win devs) should be OK for a few years, but who knows, maybe in 10 years, it will be just 40%, and 0% on mobile phone OS market. Personally, I'm not much worried, because I think Microsoft will fight hard for their desktop OS market share, but I'm interested in your opinions.

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• Simple javascript problem in ie6 and ie7

  - by Jeff Lamb

  I have a very simple function that takes a list of comma separated (x,y) points and imports them into a graph. I have FF, Chrome and IE8 installed. I use IETester to test for IE6 and IE7. // Import Data this.Import = function(data) { alert("Data in: "+data); var d; // Make sure the first and the last are start/ending parenthesis if ( (data[0] != '(') || (data[data.length-1] != ')') ) { alert("After if: "+data[0]+" "+data[data.length-1]); return false; } ... In Chrome, FF and IE8, I don't see the "After if:" alert. In IE6 and IE7, I see the following two alerts: Data in: (52,16),(100,90) After if: undefined undefined The "Data in" alert matches in all browsers. Any ideas?

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