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  • Limit the amount of data that can be stored in a folder on Ubuntu Server 12.04?

    - by dougoftheabaci
    I'm in the process of building my first server. It's up, it's running, I'm transferring copious amounts of data away from my horrid little Drobo (DO NOT BUY ONE OF THESE, EVER). However, there's one thing I have yet to do: I'd like to set it up for Time Machine backups as well. I've seen all the guides and I have some idea of how to set the whole thing up, but the issue is that Time Machine will just fill up as much space as you let it. So if I let it lose in my 8 TB zpool it'll slowly consume every last available sector. This, of course, is not acceptable. I have a folder at the root of my zpool called "ZFS Time Machine" and I would like to limit it to 1 TB (all I need for backup purposes). However, I have no idea how to do that. Is this possible? I can continue using a small external hard drive attached via FW800 if I have to but I'd much rather prefer putting everything on my server.

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  • Trim "Minify" inline css at runtime, expand it at edit time.

    - by Scott B
    My custom WP theme has a text block in the theme options panel that allows the user to create and maintain a custom css block that is applied to the site template at runtime. I would like to trim or "minify" this content before its stored in the database, but retain all the whitespace when its presented back to the user for editing. Would this be possible? For example, if the user has entered the following as their custom css code... .red {color:red;} .green {color:green;} .blue {color:blue;} Then I would like to store it in the database as: .red{color:red;}.green{color:green;}.blue{color:blue;} But still display it as it was input (ie, retain all the white space and line breaks) when the user is editing the content via my theme options panel.

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  • Strategy Design Pattern -- *dynamic* !!!

    - by alexeypro
    My application will have different strategies for my objects. What's the best way of implementing that? I would really love the case when we can make strategy classes implementation dynamically loaded from, say, some relational database. Not sure how do that better, though. What's the best approach? Idea is that say we want to apply to object MyObj strategy Strategy123 then we just load from database by ID 123 the object, deserialize it, get the Strategy class, and use it with MyObj. The maintenance while sounds easier from the first look can be a pain in the long run if Strategy interfaces changes, etc. What can I do also? I want to find solution when I should be keeping Strategy classes in codebase -- just for the sake that I don't need code change and re-deployment of the application if my Strategy changes, or I add new strategy. Please advise!

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  • MySQL encoding problem after site move

    - by Quan Zhou
    Guys, I need your help. Since last month my friend has lost his database on Dreamhost, he decided to move his wordpress based blog site (written in Chinese) to my server. He's using a wp-plugin called wp-db-backup to perform regular db backups. And the servers backgrounds are: Dreamhost: Linux 2.6.31.5-modsign-aufs2-grsec-2-opt mysql Ver 14.12 Distrib 5.0.16, for pc-linux-gnu (i386) using readline 5.0 apache2 unknown version My Server: Linux li159-46 2.6.32.12-x86_64-linode12 mysql Ver 14.14 Distrib 5.1.45, for debian-linux-gnu (x86_64) using readline 6.1 nginx 0.8.36 His site's encoding was UTF-8 in both wp-config and db. I imported his db backup file in UTF-8 by default, then I sync'd files using rsync from dreamhost, then I just changed the db address and nothing more. But when I take first look at the "new" site, it was full of unreadable characters, I met this problem before, I changed charset options in browser but none of them can make it displayed properly. Then I converted his db to GB18030, it works with only if browser set charset to GB18030 either GBK, but by default they recognize the charset as UTF-8. I tried to edit the headers but it doesn't work. What could I do now? Thx~~

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  • Any suggestions on data syncronization from a server to a desktop?

    - by Jamey McElveen
    I have a web based CRM system that stores all the client data from all the clients into one database (MS Sql Server). We need to build a system that maintains a local copy of the data for each client. So basically the client database will have all tables and columns except for the ClientId that is in ever server table. I am aware that I will need to add fields to the server to support synchronization. Are there any good solutions or components already out there to help me accomplish this? We are using MS Sql Server and .NET C#

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  • Best way to optimize queries like this in Django

    - by chris
    I am trying to lower the amount of queries that my django app is using, but I am a little confused on how to do it. I would like to get a query set with one hit to the database and then filter items from that set. I have tried a couple of things, but I always get queries for each set. let's say I want to get all names from my DB, but also separate out the people just named Ted. Both the names and the ted set will be used in the template. This will give me two sets, one with all names and one with Ted.. but also hits the database twice: namelist = People.objects.all() tedList = namelist.filter(name='ted') Is there a way to filter the first set without hitting the data base again?

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  • Attachment problem in application

    - by ahmed
    hello, I got a situation over here. We have a .Net application running on intranet ServerA(database/application server). Now we have also implemented the application on a other machine ServerB (application server only,windows Server 2003, IIS 6.0) database is pointed towards serverA. Everything works fine but the problem is we have some web forms where we are allowing some users to attach some files like documents , pdf etc. But the Public users are facing problem with the attachments. Now I need to find solution for this. Any help will be appreciated Thanking you all in advance.

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  • Getting the count of rows in a Java resultset

    - by Mr Morgan
    Hello Does anyone know a better way of getting the number of rows in a Java resultset returned from a MySQL database? I'm currently using this: public static int getResultSetRowCount(ResultSet resultSet) { int size = 0; try { resultSet.last(); size = resultSet.getRow(); resultSet.beforeFirst(); } catch(Exception ex) { return 0; } return size; } But am open to alternatives. The resultset returned is not going to be the total number of rows read from the database so I don;t think I can use SQL COUNT. Thanks Mr Morgan.

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  • sql db problem with windows authentication

    - by Jimmy
    Have a SQL Server 2008 db which I connect to the Windows Authentication .. has worked good for 7-8 months .. but now when I come to work today it no longer worked to connect, without that I had done something Error message was: Can not open user default database. Login failed. Login failed for user 'Jimmy-PC \ Jimmy'. where the first is the computer name and the second is the user. The problem seems to be that it tries to connect to the default database. Have tried to change it without success .. I do not have sql server management tools for sql 2008 but only to 2005, someone who has similar experience? who have not touched anything said over the weekend and it worked last Friday without any problems.

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  • Detect if a table contains a column in Android/sqlite

    - by sandis
    So I have an app on the market, and with an update I want to add some columns to the database. No problems so far. But I want to detect if the database in use is missing these columns, and add them if this is the case. I need this to be done dynamically and not just after the update to the new version, because the application is supposed to still be able to import older databases. Normally I would be able to use the PRAGMA query, but Im not sure how to do this with Android. I cant use execSQL since it is a query, and I cant figure out how to use PRAGMA with the query()-function. Ofcourse I could just catch exceptions and then add the column, or always add the columns to each table before I start to work with it, but that is not a neat solution. Cheers,

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  • Quercus on Google App Engine: Class not loading

    - by gAMBOOKa
    Fatal Error: no matching class connection index.php <?php import database.connection; $connection = connection::get()->getPersistenceManager(); // ***ERROR HERE*** ?> connection.java package database; import javax.jdo.JDOHelper; import javax.jdo.PersistenceManagerFactory; public final class connection { private static final PersistenceManagerFactory pmfInstance = JDOHelper.getPersistenceManagerFactory("transactions-optional"); private connection() {} public static PersistenceManagerFactory get() { return pmfInstance; } } Quercus is otherwise configured fine, PHP implementation works smoothly on GAE. But when I try to initialize classes, PHP can't find them. What am I doing wrong?

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  • How to the view count of a question in memory?

    - by Freewind
    My website is like stackoverflow, there are many questions. I want to record how many times a question has been visited. I have a column called "view_count" in the question table to save it. If a user visits a question many times, the view_count should be increased only 1. So I have to record which user has visited which question, and I think it is too much expensive to save this information in the database because the records will be huge. So, I would like to keep the information in memory and only persist the number to the database every 10 minutes. I have searched about "cache" in Rails, but I haven't found an example. I would like a simple sample of how to do this, thanks for help~

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  • Using transactions with ADO.NET Data Adapters.

    - by Ergwun
    Scenario: I want to let multiple (2 to 20, probably) server applications use a single database using ADO.NET. I want individual applications to be able to take ownership of sets of records in the database, hold them in memory (for speed) in DataSets, respond to client requests on the data, perform updates, and prevent other applications from updating those records until ownership has been relinquished. I'm new to ADO.NET, but it seems like this should be possible using transactions with Data Adapters (ADO.NET disconnected layer). Question part 1: Is that the right way to try and do this? Question part 2: If that is the right way, can anyone point me at any tutorials or examples of this kind of approach (in C#)? Question part 3: If I want to be able to take ownership of individual records and release them independently, am I going to need a separate transaction for each record, and by extension a separate DataAdapter and DataSet to hold each record, or is there a better way to do that? Each application will likely hold ownership of thousands of records simultaneously.

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  • How to save the view count of a question in memory?

    - by Freewind
    My website is like stackoverflow, there are many questions. I want to record how many times a question has been visited. I have a column called "view_count" in the question table to save it. If a user visits a question many times, the view_count should be increased only 1. So I have to record which user has visited which question, and I think it is too much expensive to save this information in the database because the records will be huge. So, I would like to keep the information in memory and only persist the number to the database every 10 minutes. I have searched about "cache" in Rails, but I haven't found an example. I would like a simple sample of how to do this, thanks for help~

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  • How to transfer SQLite db to web server

    - by Shane
    Hi, I have an application that creates an SQLite database and saves information to it over the course of a day. At the end of the day i want to export this database to a web server. Could anyone point me in the right direction for this? Should I use httppost or put. I have researched this myself online but there seems to be so many different ways to explore. The server side does not exist yet either. I have access to an apache server so i am hoping to use that. Could anyone advise me the best/most simple way to do this? Thanks

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  • Sub-query problem on Oracle 10g

    - by Eric
    The following query works on Oracle 10.2.0.1.0 on windows,but doesn't work on Oracle 10.2.0.2.0 on Linux. What's the problem?How can I make it work? Thanks! CREATE TABLE AUDITHISTORY( CASENUM numeric(20, 0) NOT NULL, AUDIT_DATE date NOT NULL, USER_NAME varchar(255) NULL, AUDIT_USECS numeric(6, 0) NOT NULL ) Query: SELECT T.CASENUM, T.USER_NAME, T.AUDIT_DATE AS STARTED, (SELECT * FROM (SELECT S.AUDIT_DATE FROM AUDITHISTORY S WHERE S.CASENUM=T.CASENUM AND S.USER_NAME=T.USER_NAME AND (S.AUDIT_DATE > T.AUDIT_DATE OR (S.AUDIT_DATE = T.AUDIT_DATE AND S.AUDIT_USECS > T.AUDIT_USECS)) ORDER BY S.AUDIT_DATE ASC,S.AUDIT_USECS ASC ) WHERE rownum <= 1) AS ENDED FROM AUDITHISTORY T BANNER Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod PL/SQL Release 10.2.0.1.0 - Production CORE 10.2.0.1.0 Production TNS for 32-bit Windows: Version 10.2.0.1.0 - Production NLSRTL Version 10.2.0.1.0 - Production BANNER Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - Prod PL/SQL Release 10.2.0.2.0 - Production CORE 10.2.0.2.0 Production TNS for Linux: Version 10.2.0.2.0 - Production NLSRTL Version 10.2.0.2.0 - Production

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  • Current ways to do data binding in .NET 3.5 with C# 3.0 and WinForms

    - by kryptic
    Hello Everyone, I have an existing C# 3.0 WinForms project with .NET 3.5 that talks to a MySQL database. I would like to use data binding (I'm new to this, so I've been doing all of the UI updates manually) to simplify things. I followed a link from this question to this article which mentions using a DataSet but also follows up with "my view on this topic is strongly in favor of Business Objects." Also that was with .NET 2.0. What are the current methods to use data binding with a WinForms application? What are their advantages in terms of simplicity, how much additional code is necessary, etc. For reference, I use an ORM approach to build objects with public properties from a database. I want to map these properties for each object onto UI elements like TextBoxes. There could be many properties for an object so I want to simplify the code to do this.

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  • MySQLNonTransientConnectionException in jdbc program at run time

    - by Sunil Kumar Sahoo
    Hi I have created jdbc mysql connection. my program works fine for simple execution of query. But if i run the same program for more than 10 hour and execute query then i receives the following mysql exception. I have not used close() method anywhere. i created database connection and opened it forever and always execute query. there is no where that i explicitly mentioned timeout for connection. i am unable to identify the problem com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Connection.close() has already been called. Invalid operation in this state. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after statement closed. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sample code for database connection: String driver = PropertyReader.getDriver(); String url = dbURLPath; Class.forName(driver); connectToServerDB = DriverManager.getConnection(url); connectToServerDB.setAutoCommit(false);

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  • How long will a USB key with an OS installed on it last?

    - by Xananax
    I've heard numerous times that installing an OS on a USB key is a bad thing to do, as USBs typically have a certain number of writes before dying, and installing an OS on it will wear it out (unless it's used sporadically for rescue purposes). Nonetheless, I am very tempted to install some flavour of Linux (Ubuntu or Arch, I haven't decided yet) on a small, transportable, USB Key. My problem is, although you read a lot that it's "bad", you are never told how bad. How long would it last (provided, say, a pc that is 24/7 on)? A month? A year? Five years? Is there recipes to make it last longer? Is there any reason beside weariness that should prevent me from attempting this? I mean, if it can be calculated, then I could theoretically shield myself by doing regular backups on another key when the deadline gets close (for example). Notes I am not talking of using a USB as a live CD, but actually installing the OS on it.) When I say "USB Key", I refer to the little USBs with a flash memory, not an external USB hard drive. For the curious, my reason is that I work in a lot of different places, on different PCs, and I have a very customized session, with my own WM, my own key bindings, my own scripts, , a selection of plugins for firefox and chrome, etc, and currently I am synchronizing all this through a mix of dropbox, git, and transporting files on USBs, and and it's becoming a chore. It would be much simpler for me to just plug the USB and mount the hard disk of the PC I am using and use it's processing power without actually needing to install any OS on it.

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  • CIFS mounted drive setting "stick-bit" on all files, cannot change permissions or modify files

    - by mattmcmanus
    I have a folder mounted on an Ubuntu 8.10 sever through cifs that I simply cannot change the permissions on once mounted. Here is a breakdown of what's going on: All files within the mounted folder automatically have their permissions set to -rwxrwSrwx regardless of whether the file is create on the windows server or on the linux machine. I have the same directory mounted on two other linux servers (both running 9.10 instead of 8.10) with no problems at all. They all are using the same fstab options and the same credentials. //server/folder /media/backups cifs credentials=/etc/samba/.arcadia_cred,noexec,noserverino 0 0 I've I run a chmod command a million different ways, all of which report successfully changing the permissions. However it doesn't. The issue began after I updated from 8.04 to 8.10 Any idea why this may be happening on one machine? Since it started after an upgrade I'm not sure what is the bes thing to do. Any help you could give would great! None of my automated backup scripts are working because of this!

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  • SSIS(sql server integration service) xml data flow

    - by swapna
    Hi, I have an xml file the content which i have to write to a Database table using ssis pacakge. I am using xml source nad oledb destination My issue now is this xml file generate multiple outputs .(event,produt,offer,form) etc. But i need to write all in one data row(more than one if 2 products are there for the event) in the database. But i do not know how to use this multiple outputs and make a single row for a event. I hav read numerous articles about this subject but not able to take a decision.what is the right way of doing this. 1) xml source ? (if i use this how do i merge the multiple outputs) 2) or a script task using xml objects read and write to the DB. or anything new ? Please provide me some solutions xml sample file * - ABc. 2009-06-07 2010-04-30 region test 1 contact - offertest product1 product1 187 * Thanks SNA

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  • Am I Leaking ADO.NET Connections?

    - by HardCode
    Here is an example of my code in a DAL. All calls to the database's Stored Procedures are structured this way, and there is no in-line SQL. Friend Shared Function Save(ByVal s As MyClass) As Boolean Dim cn As SqlClient.SqlConnection = Dal.Connections.MyAppConnection Dim cmd As New SqlClient.SqlCommand Try cmd.Connection = cn cmd.CommandType = CommandType.StoredProcedure cmd.CommandText = "proc_save_my_class" cmd.Parameters.AddWithValue("@param1", s.Foo) cmd.Parameters.AddWithValue("@param2", s.Bar) Return True Finally Dal.Utility.CleanupAdoObjects(cmd, cn) End Try End Function Here is the Connection factory (if I am using the correct term): Friend Shared Function MyAppConnection() As SqlClient.SqlConnection Dim cn As New SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("MyConnectionString").ToString) cn.Open() If cn.State <> ConnectionState.Open Then ' CriticalException is a custom object inheriting from Exception. Throw New CriticalException("Could not connect to the database.") Else Return cn End If End Function Here is the Dal.Utility.CleaupAdoObjects() function: Friend Shared Sub CleanupAdoObjects(ByVal cmd As SqlCommand, ByVal cn As SqlConnection) If cmd IsNot Nothing Then cmd.Dispose() If cn IsNot Nothing AndAlso cn.State <> ConnectionState.Closed Then cn.Close() End Sub I am getting a lot of "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding." error messages reported by the users. The application's DAL opens a connection, reads or saves data, and closes it. No connections are ever left open - intentionally! There is nothing obvious on the Windows 2000 Server hosting the SQL Server 2000 that would indicate a problem. Nothing in the Event Logs and nothing in the SQL Server logs. The timeouts happen randomly - I cannot reproduce. It happens early in the day with only 1 to 5 users in the system. It also happens with around 50 users in the system. The most connections to SQL Server via Performance Monitor, for all databases, has been about 74. The timeouts happen in code that both saves to, and reads from, the database in different parts of the application. The stack trace does not point to one or two offending DAL functions. It's happened in many different places. Does my ADO.NET code appear to be able to leak connections? I've goolged around a bit, and I've read that if the connection pool fills up, this can happen. However, I'm not explicitly setting any connection pooling. I've even tried to increase the Connection Timeout in the connection string, but timeouts happen long before the 300 second (5 minute) value: <add name="MyConnectionString" connectionString="Data Source=MyServer;Initial Catalog=MyDatabase;Integrated Security=SSPI;Connection Timeout=300;"/> I'm at a total loss already as to what is causing these Timeout issues. Any ideas are appreciated.

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  • Class Type Expected error on TableAdapter constructor

    - by Chris Franz
    I am using Delphi Prism to connect to an Advantage Database Server. I created a connection using the server explorer to the database. I added a dataset object to my project and added a table to the dataset. Everything works fine in the IDE, however, I get an error in the generated designer code on the table adapter constructor. The error is: (PE26) Class type expected. Here is the generated code: { Presidents.PresidentsTableAdapters.USPRESIDENTSTableAdapter } constructor Presidents.PresidentsTableAdapters.USPRESIDENTSTableAdapter; begin self.ClearBeforeFill := true; end;

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