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  • SQLServer Replication, dealing with updating data in a subscriber without merging with the publisher

    - by FlySwat
    To simplify my problem, picture two databases, one is a publisher, one is a replicated subscriber. Most of the time, changes are configured in the publisher, and pushed to the subscriber once per day using transactional replication. (The subscriber is the main production database). However, on a rare occasion, we need to make a change directly to the subscriber database. This does not break replication, however to ensure consistency, we also want to replicate this single change back to the publisher database. My first thought was to make both databases publishers to each other, but that does not work. Merge replication also does not work as that merges the data together, and we really only want to push that single change from the subscriber back to the publisher. Is there some other replication scheme I can use here, or do I need to invent my own thing?

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  • Clustering and DB Replication in virtualized (and cloud) environments

    - by devdude
    Both replication and clustering are terms for servers setups with physical (real) servers, usually implemented on a DB or AS level. Now the question: In a virtualized environment with "easy" scalable servers (touching clustering) and a higher availability (DB replication) through the means of high availability of the virtual server by the cloudserver provider, do we really need replication and clustering (as in covering the problems of traditional servers) ? Question is asked from a soultion/application provider viewpoint. Please exclude the need of replication with a business requirement background, eg. the need to replicate a DB at 2 different geographical locations to ensure performance and data. Thanks for your insights !

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  • SQL SERVER – DBA or DBD? – Database Administrator or Database Developer

    - by pinaldave
    Earlier this month, I had poll on this blog where I asked question – Are you a Database Administrator or Database Developer? The word DBA (Database Administrator) is very common but DBD (Database Developer) is not common at all. This made me think – what is the ratio of the same. Here the result of the poll: Database Administrator 36.6% (254 votes) Database Developer 63.4% (440 votes) Total Votes: 694 This is open poll, if you want you can still participate here. Vote your Voice – DBD or DBA? I think it is the time when DBD word for Database Developer gets place in our dictionary. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Database, DBA, Pinal Dave, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLServer, T SQL, Technology

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  • Oracle Database 12c is available for download now!

    - by Mike Dietrich
    Good things come to those who wait ... finally ... Oracle Database 12c (Oracle 12.1.0.1) is available for download from the Oracle Software Cloud (formerly know as eDelivery) and OTN (Oracle Tech Network) for Linux 64bit (Solaris will follow within the next few hours): eDelivery:Oracle Database 12c (12.1.0.1) for Linux 64bitOracle Database 12c (12.1.0.1) for Solaris SPARC64Oracle Database 12c (12.1.0.1) for Solaris x86. OTN:Oracle Database 12c (12.1.0.1) for Linux 64bitOracle Database 12c (12.1.0.1) for Solaris SPARC64Oracle Database 12c (12.1.0.1) for Solaris x86  . And yes, it will be supported on Oracle Exadata and SuperCluster as well . . And with the release of Oracle Database 12c we are offering you also our NEWUpgrade, Migrate and Consolidate to Oracle Database 12cslide deck with (sorry, we've did it again!) over 500 slides covering: The brand new Parallel Upgrade including new Pre/Post-Upgrade-Fix-Ups The new Full Transportable Export/Import Feature Obviously Oracle Multitenant, which got talked about a lot as Pluggable Databases or Container Databases before Plenty of new parameters, cool and very helpful features and much more ... Download the slides Upgrade, Migrate and Consolidate to Oracle Database 12c And of course, the slide deck will see some updates in the near future -Mike . .

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  • How can an SQL relational database be used to model a thesaurus? [closed]

    - by Miles O'Keefe
    I would like to design a web app that functions as a simple thesaurus: a long list of words with attributes, all of which are linked to each other. This thesaurus data model can be defined as: a controlled vocabulary arranged in a known order in which equivalence, hierarchical, and associative relationships among terms are clearly displayed and identified by standardized relationship indicators. My idea so far is to have one database in which every word is a table, and every table contains all words related to that word. e.g. Thesaurus(database) - happy(table) - excited(row)|cheerful(row)|lively(row) Is there are more efficient way to store words and their relationship to other words in a relational SQL database?

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  • MySQL replication Slave_IO_Running: No

    - by Christy
    Hi all, I have two servers that I am trying to get replication of one database between. I found a setup guide on sourceforge that I followed and I have tried various other settings since then, but no matter what I do, when I start the slave, the 'Slave_IO_Running' setting is always No.... I have no idea why or what to look at, any suggestions are appreciated. The slave setup was: CHANGE MASTER TO MASTER_HOST='myserver.mydomain.net', MASTER_USER='slave_user', 'MASTER_PASSWORD='mypassword', 'MASTER_LOG_FILE='mysql-bin.000011', MASTER_LOG_POS=1368363 (last data from today, trying to do setup again. I deleted and recreated the database on the slave from a new dump and tried to redo the setup.) I have slave_user setup for %, localhost, and the specific IP of the slave computer but nothing seems to be working... Thanks in advance for any advice or suggestions

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  • MySQL Replication Error

    - by Ian
    I recently updated my master server to 5.1.41 and noticed that the slave was no longer replicating. It was returning this erorr: 091208 12:53:31 [ERROR] Slave I/O: error connecting to master '[email protected]:3306' - retry-time: 10 retries: 86400, Error_code: 2026 091208 12:53:41 [ERROR] Slave I/O: error connecting to master '[email protected]:3306' - retry-time: 10 retries: 86400, Error_code: 1045 The first error is apparently an SSL error, followed by auth denied.. Thing is, I haven't touched my SSL key or user access in months (and the key is fine, since I'm using the same one on that machine to replicate from other master servers.. Any ideas? Edit: Months later, I've tried with 5.1.44 and the problem is persisting. When I roll back to 5.1.39 replication works great... I guess I can't use anything newer than 5.1.39....

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  • Replication in PG 9 between Windows and Linux boxes

    - by mlaverd
    I have PostgreSQL 9 running on Windows 2003 SP2. I am trying to replicate it on a Fedora 12 system running PostgreSQL 9 as well. I am hitting this error message: /usr/pgsql-9.0/bin/postgres -D /var/lib/pgsql/9.0/data/ -p 5432 2011-02-11 17:43:26 ISTFATAL: incorrect checksum in control file Because of firewall restrictions, I could not follow the official instructions to the letter. Instead, I zipped the contents of the data directory when the server was offline and copied that to the Linux box. I ran a sha1deep on both directories and there were no mismatches. I changed the rights so that only the postgres user and group had access to the files. Now, what can I do for replication to work? I tried with a 'pg_dumpall', but the system complains that the database IDs do no match.

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  • DFS replication initial step problem

    - by vn
    Heya, I just setup DFS on my network and it's working fine, and now I'm trying to setup DFS-R on a test folder, but then at the end of the procedure (all went fine, selected my 2 folders, primary folder, replication topology and such) I get this error message (roughly translated from french) : Unable to define security on the replicated folder. The shared administration folder doesn't exist. I'm also wondering if there's any required security on the folders to replicate so that DFS-R can access it. I was trying to add SYSTEM in the security, but it won't find it/allow me. The folder has many many files and folders on the primary DFS pointer, but none on the 2nd, just created it with quite the same rights. Note that the primary DFS pointer is on a 2008 server and the DFS service and the secondary DFS pointer are on a 2008r2. Any help is very appreciated, thanks.

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  • Using GlusterFS for simple replication

    - by k7k0
    Hi, newbie question. I need to build this: /shared folder ~500GB of files, ~1MB each one. Two boxes (server1 and server2) connected by a 1Gbs LAN Every box needs to get r/w access to the files, so their are both clients I want that the files replicated on both boxes, every time a file is written in one server the same file should be present in the other one. My questions regarding GlusterFS: It'll duplicate the files on the same box?. For example the files are on /shared and the mount in /mnt/shared. It'll take 1GB space on every server? Instead, should I use the filesystem directly, locally writing on /shared? Does the replication work in this way without mountin a client? Also, if anyone know any other way to acomplish this setup I'll be very grateful. Thanks in advance.

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  • Logging Apparently Not Working - Can't Set Configure Replication

    - by square_eyes
    I'm using a tutorial to set up a master (single) slave setup. When I run the command show master status; I get Empty set (0.00 sec). I have done a lot of research and believe that the log file I have set up isn't being used properly. The master is a Windows server, and I am administering it through workbench. The log file (log-bin.log) I have configured in the options exists, and is accessible by 'System'. But when I open it as a text file it doesn't have any data. So I'm assuming it's not getting used properly. How can I get the logging happening so I can finish setting up this replication? Edit: Purely for reference here is the tutorial. I followed all the steps and double checked everything up until show master status.

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  • Filtering columns in SQL Server replication - how?

    - by truthseeker
    Hi, I need to replicate some data from two tables in one database to another databases. I used snapshot replication. The issue is that I would like to replicate only some selected columns and the others should stay with untouched data. I don't want to loose their data. The sours of those columns is other system. So I need to replicate only data from my columns. Do anybody know how to achieve this?

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  • SQL Server 2008 Replication Promotion

    - by Stefan Mai
    I have a 4 node cluster, 1 subscriber and 3 publishers, all running SQL Server 2008 R2 Enterprise. The intention is that if the subscriber goes down, we can use one of the publishers to quickly build up its replacement. Our testing reveals a problem though: the subcriber databases all have Not For Replication set to Yes on the identity columns so that they can maintain the identity set in the subscriber. This causes a problem when they become subscribers because now we don't have identity insert functionality: we get a primary key error. Any way to "promote" a subscriber to publisher?

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  • DFS replication initial step problem

    - by vn.
    I just setup DFS on my network and it's working fine, and now I'm trying to setup DFS-R on a test folder, but then at the end of the procedure (all went fine, selected my 2 folders, primary folder, replication topology and such) I get this error message (roughly translated from french) : Unable to define security on the replicated folder. The shared administration folder doesn't exist. I'm also wondering if there's any required security on the folders to replicate so that DFS-R can access it. I was trying to add SYSTEM in the security, but it won't find it/allow me. The folder has many many files and folders on the primary DFS pointer, but none on the 2nd, just created it with quite the same rights. Note that the primary DFS pointer is on a 2008 server and the DFS service and the secondary DFS pointer are on a 2008r2. Any help is very appreciated, thanks.

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  • Active Directory replication failing with Access is Denied

    - by Justin Love
    I recently discovered that Active Directory replication started failing about a month ago. If I attempt to Replicate Now from the failing domain controller, I receive The following error occurred during the attempt to synchronize the domain controllers: Access is denied. It is between two servers at a remote site. One is Windows 2003 and the other is Windows 2000; the Windows 2000 machines is experiencing the errors. The domain is older OUR_DOMAIN style. Attempts so far: I disabled Kerberos service on the Windows 2000 server and restarted RPC and RPC locater services have expected settings HKEY_Local_Machine\Software\Microsoft\Rpc\ClientProtocols missing ncacn_nb_tcp on Windows 20003 server (added) Portqry reports okay Firewall disabled netdom resetpwd (and reboot) on Windows 2000 server.

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  • Active Directory Replication across Sites slow or not working

    - by neildeadman
    I've just inherited (isn't it always the way!) a Windows Domain. The domain is spread across 2 sites. Site01 has 3 DCs & Site02 has 2 DCs. If I create a user in either site, the other DCs in that site, immediately replicate and show the new user. The new user is not shown in the other site though. If I manually run the following command, everything syncs and the new user appears: repadmin /syncall issdc01 /APed In the Inter-Site Transports DEFAULTIPSITELINK the replicate every time value is set to 180 minutes. I thought this was the solution, but on another Windows Domain, this is the same, but replication takes place across sites immediately. What can I check to resolve this issue? We are running Windows Server 2008 Results of dcdiag /test:dns show a server that is no longer part of our domain: TEST: Delegations (Del) Error: DNS server: oldserver.win.domain.com IP: [Missing glue A record]

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  • LDAP replication breaking referrals

    - by MasterZ
    We have an issue that we believe is caused by ldap replication changing the port of the referal from 686 (secure) to 389 (unsecure). If we setup a new referral everything works, but then as soon as we change someone's password it changes on the master, and then the master replicates and the referral breaks. Any further attempts to modify someone's account give the error "PAM: Cannot connect to LDAP". We used snoop and monitored the firewall to see what was going on. The first password attempt (the one that works) goes over port 686 (as it is supposed to) but every subsequent attempt attempts to use port 389, and therefore fails. We only have 1 referral configured on the client, port 686

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  • Database – Beginning with Cloud Database As A Service

    - by Pinal Dave
    I love my weekend projects. Everybody does different activities in their weekend – like traveling, reading or just nothing. Every weekend I try to do something creative and different in the database world. The goal is I learn something new and if I enjoy my learning experience I share with the world. This weekend, I decided to explore Cloud Database As A Service – Morpheus. In my career I have managed many databases in the cloud and I have good experience in managing them. I should highlight that today’s applications use multiple databases from SQL for transactions and analytics, NoSQL for documents, In-Memory for caching to Indexing for search.  Provisioning and deploying these databases often require extensive expertise and time.  Often these databases are also not deployed on the same infrastructure and can create unnecessary latency between the application layer and the databases.  Not to mention the different quality of service based on the infrastructure and the service provider where they are deployed. Moreover, there are additional problems that I have experienced with traditional database setup when hosted in the cloud: Database provisioning & orchestration Slow speed due to hardware issues Poor Monitoring Tools High network latency Now if you have a great software and expert network engineer, you can continuously work on above problems and overcome them. However, not every organization have the luxury to have top notch experts in the field. Now above issues are related to infrastructure, but there are a few more problems which are related to software/application as well. Here are the top three things which can be problems if you do not have application expert: Replication and Clustering Simple provisioning of the hard drive space Automatic Sharding Well, Morpheus looks like a product build by experts who have faced similar situation in the past. The product pretty much addresses all the pain points of developers and database administrators. What is different about Morpheus is that it offers a variety of databases from MySQL, MongoDB, ElasticSearch to Reddis as a service.  Thus users can pick and chose any combination of these databases.  All of them can be provisioned in a matter of minutes with a simple and intuitive point and click user interface.  The Morpheus cloud is built on Solid State Drives (SSD) and is designed for high-speed database transactions.  In addition it offers a direct link to Amazon Web Services to minimize latency between the application layer and the databases. Here are the few steps on how one can get started with Morpheus. Follow along with me.  First go to http://www.gomorpheus.com and register for a new and free account. Step 1: Signup It is very simple to signup for Morpheus. Step 2: Select your database   I use MySQL for my daily routine, so I have selected MySQL. Upon clicking on the big red button to add Instance, it prompted a dialogue of creating a new instance.   Step 3: Create User Now we just have to create a user in our portal which we will use to connect to a database hosted at Morpheus. Click on your database instance and it will bring you to User Screen. Over here you will notice once again a big red button to create a new user. I created a user with my first name.   Step 4: Configure your MySQL client I used MySQL workbench and connected to MySQL instance, which I had created with an IP address and user.   That’s it! You are connecting to MySQL instance. Now you can create your objects just like you would create on your local box. You will have all the features of the Morpheus when you are working with your database. Dashboard While working with Morpheus, I was most impressed with its dashboard. In future blog posts, I will write more about this feature.  Also with Morpheus you use the same process for provisioning and connecting with other databases: MongoDB, ElasticSearch and Reddis. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: MySQL, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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  • Should database-models (conceptual or physical) be reviewed by DBAs?

    - by user61852
    Where I work, new applications that are being developed that will use their own relational database, must have their database-models (conceptual, then physical ) reviewed and aproved by DBAs. Things looked after are normalization, antipatterns, table and column naming standards, etc. Is this really a DBA's responsability to do this ? or should it be, in a greater extend, the responsability of app designers and architects ?

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  • What would a database look like if it were normalized to be completely abstracted? lets call it Max(n) normal form

    - by Doug Chamberlain
    edit: By simplest form i was not implying that it would be easy to understand. For instance, developing in low level assembly language is the simplest way to can develop code, but it is far from the easiest. Essentially, what I am asking is in math you can simplify a fraction to a point where it can no longer be simplfied. Can the same be true for a database and what would a database look like in its simplest, form?

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  • How should I copy the "mysql" database to my new server using PHPMyAdmin

    - by undefined
    My new webhosting company has set up a MySQL database for me and it has the tables MySQL and Information_schema already there. I want to copy my existing database from another server (a) to the new one (b). I assume I need to overwrite the 'mysql' database on server (b) with the one from my existing server (a) or atleast copy over the permissions. 1) What information does the mysql database hold? users and permissions I can see, does it have the login info for phpMyAdmin? I dont want to overwrite that obviously. 2) Should I drop the table on server (b) and import my original? 3) Should I just copy the users table? 4) Do I need to worry about the information_schema table? should I copy this over too? thanks

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  • SQL Server 2005 Merge Replication to SQL Server CE 3.5

    - by user33067
    Hi, In my organization, we have a SQL Server 2005 database server (DBServer). Users of an application will normally be connected to DBServer, but, occasionally, would like to disconnect and continue their work on a laptop using SQL Server Compact Edition 3.5 (SQLCE). Due to this, we have been looking into using Merge Replication between the DBServer and SQLCE. From what I have read about this process, IIS must be installed on "the server"... yet, I have found no indication to whether this is talking about DBServer or SQLCE. I had assumed the documentation was referring to DBServer and proposed this to our networking staff. That idea was quickly put to rest as it is not our policy to install IIS on an internal server. This is where our SQL Server 2005 web server (WebServer) entered the picture. The idea being that IIS would be installed on WebServer and would be the conduit for DBServer and SQLCE to communicate. This sounded like a good idea at first, until I started looking for documentation on this type of setup. Everything I have been able deals with a DBServer -- SQLCE -- DBServer setup... nothing on DBServer -- WebServer -- SQLCE -- WebServer -- DBServer. Questions: Is going with a 3 server setup ideal? Does anyone have documentation on this type of setup? Does IIS even need to be running on one of the big servers, or can it just run off the laptop with SQLCE on it? (I'd really like this option ;))

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  • How to enable telnet with port 3306 during Master to master replication on MySQL Server

    - by Mainio
    I am trying to do Master to Master Replication in Windows Server 2008. I am successfully able to replicate all the database of Master 1 to Master 2. But I am unable to replicate the changes made on Master 2 to Master 1. Later on I found that, I can telnet to Master 1 from Master 2 with port 3306 but I am not able on telnet from Master 1 to Master 2. When I check netstat on both Master. I found the following result. I couldn't publish my public IP so I put name as Master 1 and Master 2 for their respective IP Master 1 C:\Users\XXXXX>netstat Active Connections Proto Local Address Foreign Address State TCP Master 1:3306 Master 2:61566 ESTABLISHED TCP Master 1:3389 My remote:56053 ESTABLISHED TCP 127.0.0.1:3306 Master 1:60675 ESTABLISHED TCP 127.0.0.1:3306 Master 1:60712 ESTABLISHED TCP 127.0.0.1:60675 Master 1:3306 ESTABLISHED TCP 127.0.0.1:60712 Master 1:3306 ESTABLISHED Master 2 C:\Users\XXXX>netstat Active Connections Proto Local Address Foreign Address State TCP Master 2:3389 My remote:56124 ESTABLISHED TCP Master 2:61566 Master 1:3306 ESTABLISHED TCP Master 2:61574 bil-sc-cm02:http ESTABLISHED TCP 127.0.0.1:3306 Master 2:61562 ESTABLISHED TCP 127.0.0.1:3306 Master 2:61563 ESTABLISHED TCP 127.0.0.1:61562 Master 2:3306 ESTABLISHED TCP 127.0.0.1:61563 Master 2:3306 ESTABLISHED TCP 127.0.0.1:61573 Master 2:3306 TIME_WAIT All shows that In my master 2, port 3306 is not activate. Now I need solution over here. How can I figure it. Your small suggestion would be million for me. Thank you Regards, Udhyan

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  • HAproxy with MySQL Master-Master Replication incredibly slow

    - by Yayap
    I have two MySQL servers in multi-master mode, with an HAproxy machine for simple load balancing/redundancy. When I am connected to one of the servers directly and try to update about 100,000 entries, it is completed including replication in about half a minute. When connecting through the proxy it takes usually over three whole minutes. Is it normal to have that type of latency? Is something amiss with my proxy configuration (included below)? This is getting really frustrating as I assumed the proxy would do some sort of load balancing, or at least have little to no overhead. #--------------------------------------------------------------------- # Example configuration for a possible web application. See the # full configuration options online. # # http://haproxy.1wt.eu/download/1.4/doc/configuration.txt # #--------------------------------------------------------------------- #--------------------------------------------------------------------- # Global settings #--------------------------------------------------------------------- global # to have these messages end up in /var/log/haproxy.log you will # need to: # # 1) configure syslog to accept network log events. This is done # by adding the '-r' option to the SYSLOGD_OPTIONS in # /etc/sysconfig/syslog # # 2) configure local2 events to go to the /var/log/haproxy.log # file. A line like the following can be added to # /etc/sysconfig/syslog # # local2.* /var/log/haproxy.log # log 127.0.0.1 local2 # chroot /var/lib/haproxy # pidfile /var/run/haproxy.pid maxconn 4096 user haproxy group haproxy daemon #debug #quiet # turn on stats unix socket stats socket /var/lib/haproxy/stats #--------------------------------------------------------------------- # common defaults that all the 'listen' and 'backend' sections will # use if not designated in their block #--------------------------------------------------------------------- defaults mode tcp log global #option tcplog option dontlognull option tcp-smart-accept option tcp-smart-connect #option http-server-close #option forwardfor except 127.0.0.0/8 #option redispatch retries 3 #timeout http-request 10s #timeout queue 1m timeout connect 400 timeout client 500 timeout server 300 #timeout http-keep-alive 10s #timeout check 10s maxconn 2000 listen mysql-cluster 0.0.0.0:3306 mode tcp balance roundrobin option tcpka option httpchk server db01 192.168.15.118:3306 weight 1 inter 1s rise 1 fall 1 server db02 192.168.15.119:3306 weight 1 inter 1s rise 1 fall 1

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