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• HAproxy roundrobin balancing does not appear to be distributing evently

  - by andrew

  Hello, I know that with loaded servers, roundrobin in HAproxy (1.4.4) does not evenly distribute, but my servers are currently getting NO traffic (test setup), and roundrobin balancing does www1,www1,www1,www1,www1,...www2,www2,www2,...,www1... I'm verifying this by having the script being run on each server cat /etc/HOSTNAME (slackware). I need to have it switch back and forth each time to test some session stuff (stored in shared memcached) but am having trouble getting it to switch between my two web servers on each request. global log 127.0.0.1 local0 warning maxconn 4096 chroot /usr/share/haproxy pidfile /var/run/haproxy.pid uid 99 gid 99 daemon defaults balance roundrobin fullconn 100 maxconn 4096 mode http option dontlognull option http-server-close option forwardfor option redispatch retries 3 timeout connect 5000 timeout client 20000 timeout server 60000 timeout queue 60000 stats enable stats uri /haproxy stats auth ***:*** frontend www *:80 log global acl is_upload hdr_dom(host) -i uploads.site.com acl is_api hdr_dom(host) -i api.site.com acl is_dev hdr_dom(host) -i dev.site.com acl is_apidev hdr_dom(host) -i apidev.site.com use_backend uploads.site.com if is_upload use_backend api.site.com if is_api use_backend dev.site.com if is_dev !is_apidev default_backend site.com backend site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 backend api.site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:api.site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 backend dev.site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:dev.site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 backend uploads.site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:uploads.site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 backup weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 So basically, I have some different back-ends (I've verified the ACLs are working), with the default option "roundrobin" selected. I've tried removing weights, removing the minconn/maxconn/fullconn attributes for all servers (not just the backend I'm testing), tried removing the ACLs, etc. I've been testing on dev.site.com BTW. Anyone see a reason why I can't get something like www1,www2,www1,www2,...? Also, this is one of my first questions on here, so please let me know if I left anything needed out of my post. Thanks!

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• Amazon EC2 tools for Debian?

  - by Jonik

  What is the recommended way of getting command-line Amazon EC2 tools on Debian? So, basically the same as this question, but for EC2 instead of S3. Ubuntu has ec2-ami-tools and ec2-api-tools, but I couldn't find equivalent packages for Debian. A blog post titled "Install EC2 AMI & API tools in Debian" talks about installing Amazon's packages outside package management, but that seems a little clumsy.

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• PostgreSQL encrypted backups

  - by Nikhil Gupte

  Is it possible to ensure that dumps taken from a PostgreSQL db are always encrypted? The data in the database is highly sensitive and we cannot afford un-authorized personnel, including Sys Admins who need to backup the db, to access the actual data.

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• PostgreSQL Backup/Restore

  - by Ian

  What's the best way to backup a postgresql database? I've tried using the documentation at www.postgresql.org, but I always get integrity errors when restoring. Right now I'm using this for backup: pg_dump -U myuser -d mydatabase db.pg.dump for restore: pg_restore -c -r -U myuser -d mydatabase db.pg.dump But I'm not getting the desired results..

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• What the best way to achieve RPO of zero and lowest possible RTO (less than 15 minutes) with SQL 2008 R2?

  - by Adrian Hope-Bailie

  We are running a payments (EFT transaction processing) application which is processing high volumes of transactions 24/7 and are currently investigating a better way of doing DB replication to our disaster recovery site. Our current and previous strategies have included using both DoubleTake and Redgate to replicate data to a warm stand-by. DoubleTake is the supported solution from the payments software vendor however their (DoubleTake's) support in South Africa is very poor. We had a few issues and simply couldn't ever resolve them so we had to give up on DoubleTake. We have been using Redgate to manually read the data from the primary site (via queries) and write to the DR site but this is: A bad solution Getting the software vendor hot and bothered whenever we have support issues as it has a tendency to interfere with the payment application which is very DB intensive. We recently upgraded the whole system to run on SQL 2008 R2 Enterprise which means we should probably be looking at using some of the built-in replication features. The server has 2 fairly large databases with a mixture of tables containing highly volatile transactional data and pretty static configuration data. Replication would be done over a WAN link to a separate physical site and needs to achieve the following objectives. RPO: Zero loss - This is transactional data with financial impact so we can't lose anything. RTO: Tending to zero - The business depends on our ability to process transactions every minute we are down we are losing money I have looked at a few of the other questions/answers but none meet our case exactly: SQL Server 2008 failover strategy - Log shipping or replication? How to achieve the following RTO & RPO with logshipping only using SQL Server? What is the best of two approaches to achieve DB Replication? My current thinking is that we should use mirroring but I am concerned that for RPO:0 we will need to do delayed commits and this could impact the performance of the primary DB which is not an option. Our current DR process is to: Stop incoming traffic to the primary site and allow all in-flight transaction to complete. Allow the replication to DR to complete. Change network routing to route to DR site. Start all applications and services on the secondary site (Ideally we can change this to a warmer stand-by whereby the applications are already running but not processing any transactions). In other words the DR database needs to, as quickly as possible, catch up with primary and be ready for processing as the new primary. We would then need to be able to reverse this when we are ready to switch back. Is there a better option than mirroring (should we be doing log-shipping too) and can anyone suggest other considerations that we should keep in mind?

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• How to check database has not been unmounted/ marked for overwrite

  - by RPS

  Hi When restoring Exchange with use of VSS API try to catch errors in cases: 1) when restoring database has not been unmounted Exchange 2010 generate error on PreRestore call and write error to Windows Application log -all ok , but for Exchange2007 PreRestore succeded and write error toWindows Application log only 2)when restored database has been unmounted but has not been marked for overwrite Exchange 2007/2010 generate error to Windows Application log but PreRestore call succeded How can I know from application (via VSS API - not from Windows Application log) that error has happend (database has not been unmounted and has not been marked for overwrite. ) Thanks

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• Web server send outgoing request to specific isp gateway

  - by itsoft3g

  I have a server with 5 ISP connections, i am using Apache web server and php engine to run my application. Outgoing request to different API now needs to be send through a specific ISP (or a different IPs). All my API request are sent using PHP and Web server. I am not sure that php will directly communicate with Gateway or it send request via web server. Please help me to setup this. Thanks in advance.

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• Setting up reverse proxy via an HTTP proxy?

  - by billc.cn

  I have a software that has to call an external web API from inside our firewall. Currently the only way to do this is through the HTTP proxy feature of the firewall; however, the software itself does not support proxy configuration. So I am wondering is it possible to setup a reverse proxy for the API that goes through the HTTP proxy? The server is running WS2003. I can install any software on it.

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• How to get the MongoDB' current working set size

  - by Howard

  From the doc , it said "For best performance, the majority of your active set should fit in RAM." So for example, my db.stats() give me { "db" : "mydb", "collections" : 16, "objects" : 21452, "avgObjSize" : 768.0516501957859, "dataSize" : 16476244, "storageSize" : 25385984, "numExtents" : 43, "indexes" : 70, "indexSize" : 15450112, "fileSize" : 469762048, "ok" : 1 } Which value is the working set size?

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• Accessing Internal Server from Outside through SSH

  - by myahya

  The issue is as follows: I am using Ubuntu Linux. I am working from home, and I need to access a PostgreSQL database severer within my company's network. Call the DB server X. For security reasons, only one machine can be accessed from the outside using ssh, call it Y. So the scenario is: Home <--SSH-- Y <----- X(DB) I think something like SSH forwarding (configured in .ssh/config) could help with this, but I am not sure how to do this, any ideas?

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• CDN recommendation

  - by michaeld79

  Hey all, I am looking for a CDN service that is able to update the end point files on demand via API in max time of 10 min. or an expiration time for the files that is 10 min or less. In addition the CDN must have an option to upload files via API (working with PHP in my project). thanks in advance michael D

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• What is the best powershell script to restore an SQL Database?

  - by EtienneT

  To restore an SQL Server 2008 database, I would lile to be able to just do something like this in powershell: ./restore.ps1 DatabaseName.bak Then the powershell script would by convention restore it to a database with name "DatabaseName". It would disconnect any user connected to this database so that it can restore the DB. It would store the mdf and ldf in the default location. This would mainly be while developing on my personal machine. Just a quick way to restore a DB. Anyone has such a script? Thanks

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• Subversion hard disk full

  - by user37914

  Our SVN server hd was full. Deleted a load of unwanted data on there, and all appeared to be well. However, new check-ins are now failing. Can't move '/repos/db/txn-protorevs/1000-vr.rev' to '/repos/db/revs/1/1001': Permission denied 1000-vr.rev does not exist. There are two other files in there: 9-9.rev and 9-9.rev-lock Edit: I have checked file permissions just in case, and all is as it should be.

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• Need help in using svn on ubuntu 9.10

  - by michael

  Hi, I have install svn on ubuntu 9.10. But when I try to use svn to checkout code for an open source project, i get this error: $ svn co svn://svn.valgrind.org/valgrind/trunk valgrind svn: Berkeley DB error for filesystem '/home/svn/repos/valgrind/db' while opening 'nodes' table: Cannot allocate memory svn: bdb: Lock table is out of available locker entries Can you please tell me how to fix it? Thank you.

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• how to connect and select data from a JDBC over RMI database in perl?

  - by ericslaw

  I have a 3rd party application that exposes in-memory data structures via a JDBC api over RMI. How can I get data out of that database api without having to run squirrel or similar GUI application? Perl solution preferred, but java solution acceptable.

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• NGINX access logging with subdomain

  - by user353877

  We are trying to log requests made through an nginx load balancer. When we make requests to our server on a subdomain (api.blah.com), the request does not show up in the access logs However, requests made directly to blah.com do show up in the access logs. CONFIGURATION INFO We have a DNS record that creates a CNAME for the subdomain 'api' TRIED SO FAR We have tried looking in nginx.conf for exclusions (or anything that would be telling it to not log) We have tried adding server entries with the subdomain specifically and telling those to log but nothing seems to make a difference

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• Programmatically examine DLL contents

  - by Peter Hansen

  Is it possible programmatically to discover the exported names (globals, entry points, whatever) in a Windows DLL file without implementing a parser for the binary executable file format itself? I know there are tools to do this (though no open source ones I've found), but I'm curious whether there is a Windows API to accomplish the same thing or whether such tools operate merely by examining the binary file directly. I suspect there is an API for .NET libraries: if that's the case then is there a similar one for native DLLs? Edit: http://stackoverflow.com/questions/1128150 is basically an exact duplicate. The answer there is roughly "there is no API, but you can hack it using LoadLibraryEx() and navigating a few resulting data structures". Edit: I was able to use the accepted answer at http://stackoverflow.com/questions/1128150 to create a quick DLL dumper with Python and ctypes that works.

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• Setting up Metro 2.0 with Jetty 7

  - by trojanfoe

  This question relates to a previous question of mine. I am attempting to set-up a low overhead Web Container using Jetty 7 that I can deploy Web Services using Metro 2.0. I have installed the following Metro 2.0 libs into jetty/lib: webservices-extra-api.jar webservices-extra.jar webservices-rt.jar webservices-tools.jar And the following into a new jetty/lib/endorsed directory: jsr173_api.jar webservices-api.jar I start Jetty with the following script (Windows) to ensure that jetty/lib/endorsed is part of the 'endorsed library path' and to ensure that Jetty adds the webservices jars to its classpath: @echo off set JETTY_HOME=C:\dev\jetty-7.1.0 set JAVA_OPTS=-Xmx1024m -XX:MaxPermSize=512m -Djetty.home=%JETTY_HOME% -Djava.endorsed.dirs=%JETTY_HOME%\lib\endorsed -Djetty.class.path=%JETTY_HOME%\lib\webservices-rt.jar;%JETTY_HOME%\lib\endorsed\webservices-api.jar -DSTOP.PORT=8079 -DSTOP.KEY=jettykey pushd %JETTY_HOME% java %JAVA_OPTS% -jar start.jar popd However when I deploy a WebServices war file (for example Metro sample 'pricequote'), I get the following exception: java.lang.ClassNotFoundException: com.sun.xml.ws.transport.http.servlet.WSServletContextListener Can anyone help me with this please? I suspect it's related to the order of classes in Jetty's classpath?

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• SQL Server 2008 to SQL Server 2008

  - by Sakhawat Ali

  I have an MDF and LDF file of SQL Server 2005. i attached it with SQL Server 2008 and did some change in data. now when i attached it back to sql server 2005 Express Edition it gives version error. The database 'E:\DB\JOBPERS.MDF' cannot be opened because it is version 655. This server supports version 612 and earlier. A downgrade path is not supported. Could not open new database 'E:\DB\JOBPERS.MDF'. CREATE DATABASE is aborted. An attempt to attach an auto-named database for file E:\DB\Jobpers.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

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• Populate Android Database From CSV file?

  - by MoMo

  Is it possible to take a csv file stored in the res/raw resource directory and use it to populate a table in the sqlite3 database? My thought was that, if there was a way to do a bulk import for the entire file into the table then that would be cleaner and faster than iterating over each line in the file and executing individual insert statements... I've found that there is a sqlite import command that allows this: http://stackoverflow.com/questions/1045910/how-can-i-import-load-a-sql-or-csv-file-into-sqlite ...but I'm having trouble applying those statements in my Android application. My first thought was to try something like the following...but no luck: db.execSQL("CREATE TABLE " + TABLE_NAME + "(id INTEGER PRIMARY KEY, name TEXT)"); db.execSQL(".mode csv"); db.execSQL(".import res/raw/MyFile.csv " + TABLE_NAME); Is this possible? Should I be trying a different approach to populate my database? Thanks for you answers!

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• Error while using PowerMockito.whenNew()

  - by Ankush

  I am using PowerMockito(1.3.6) with Mockito(1.8.3) and Junit(4.7) for testing. I am quite stuck on an error: [junit] Testcase: testNextPNRFromQueueHappyPath(com.orbitz.galileo.host.robot.GalpoQueueConnectionTest): Caused an ERROR [junit] org/mockito/internal/IMockHandler [junit] java.lang.NoClassDefFoundError: org/mockito/internal/IMockHandler [junit] at org.powermock.api.mockito.internal.expectation.DefaultConstructorExpectationSetup.createNewSubsituteMock(DefaultConstructorExpectationSetup.java:80) [junit] at org.powermock.api.mockito.internal.expectation.DefaultConstructorExpectationSetup.withArguments(DefaultConstructorExpectationSetup.java:48) [junit] at com.orbitz.galileo.host.robot.GalpoQueueConnectionTest.testNextPNRFromQueueHappyPath(GalpoQueueConnectionTest.java:62) [junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [junit] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [junit] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) My class under test : GalpoQueueConnection is basically creating a new object of another class : QueueReadBuilder. I am trying to do something like: @RunWith(PowerMockRunner.class) @PrepareForTest({GalpoQueueConnection.class, ApolloProcUtils.class}) public class GalpoQueueConnectionTest extends TestCase{ @Test public void testNextPNRFromQueueHappyPath() throws Exception { QueueReadBuilder mockBuilder = mock(QueueReadBuilder.class); PowerMockito.whenNew(QueueReadBuilder.class).withArguments(anyString(), anyString(), anyString()).thenReturn(mockBuilder); } } It seems like somehow powermockito is trying to call IMockHandler, and I looked at Mockito 1.8.3 api, and there isn't any. Any suggestions/ clues would be welcome.

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• facebook oauth dialog doesn´t start

  - by Franz Deschler

  Hi i got the following problem: I want the user to authenticate my app, so i want to show the authorisation dialog. To do this, i tried the api function FB.api("/dialog/oauth", "get", {client_id: APP_ID, redirect_uri: URI}, function(response){ console.log(response); }); But i get this error: code: 2500 message: "Unknown path components: /oauth" type: "OAuthException" But why? The FB.api call should be the same like http://www.facebook.com/dialog/oauth?client_id=<app-id>&redirect_uri=<uri> If i put this url in the browser directly, the dialog is shown. ('window.location' also doesn´t work because of x-frame-options)

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• Where does Internet Explorer store saved passwords?

  - by Ian Boyd

  Where does Internet Explorer store saved passwords? And since this is a programming site, i'm not literally asking for the location where IE stores passwords, but which API ie uses to save passwords. At first i assumed that Microsoft was using the standard api: CredRead CredWrite which is used to save domain and generic program/web-site credentials. CredRead/CredWrite turn around and use CryptProtectData CryptUnprotectData to encrypt data with the current user's account. CredRead/CredWrite then store the data in some magical location, which contents you can see from the control panel: But i don't see IE passwords in there. So ie doesn't store passwords using CredRead/CredWrite. What api does IE use to store passwords, and if it uses CryptProtectData, where does it then store the protected data?

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• Retrieving inline images from Lotus notes using lotusscript

  - by Nazrul

  I have some NotesDocument where some RichText fields have both text and inline images. I can get text part of that items but can't retrieve inline images using lotusscript. Could any one please suggest me a way to retrieve inline images from that documents. LotusScript code: Sub Click(Source As Button) Dim session As New NotesSession Dim db As NotesDatabase Dim mainDoc As NotesDocument Dim v As NotesView Set db = session.CurrentDatabase Dim fileName As String Dim fileNum As Integer fileNum% = Freefile() fileName$ = "D:\data.txt" Open FileName$ For Append As fileNum% Set v = db.GetView("MyView") Set mainDoc = v.GetFirstDocument While Not ( mainDoc Is Nothing ) Forall i In mainDoc.Items If i.Type = RICHTEXT Then Write #fileNum% , i.Name & ":" & i.text 'how the images?? End If End Forall Set mainDoc = v.GetNextDocument( mainDoc ) Wend End Sub Thanks.

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• How to group data in PHP inside the while loop

  - by christian

  I query in a database and loop the result using while and heres the sample data retrieve: echo $db->f("FirstName")."===".$db->f("Question")."=".$db->f("Answer")."<br>"; Michael===Q2=allergy Michael===Q2=Hives Michael===Q6=A lot Michael===Q8_A=Daktacort Michael===Q1=Itch Michael===Q5=Smoke Michael===Q8_A=Diprogenta Christian===Q1=Stuffy Christian===Q6=A lot Christian===Q1=Clear Christian===Q5=Pollen How can I group them according to name and to their Q value? I want something like this result: Name Q1 Q2 ..... so on and so fort. Michael Itch Hives, Allergy Christian Stuffy

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