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  • SQL Server 2008 Replication: Snap Shot Agent timing out on a specific table

    - by Nai
    Hi all, I am going through the process of setting up a transactional replication on my set up. However, I am unable to generate a full snap shot of my database. I keep getting stuck at the same particular point of the process. From snapshot agent: [46%] The process is running and is waiting for a response from the server Other sources have mentioned increasing the timeout period but I do not think this is the problem as this occurs at around the 10 min mark, way within the default value of 1800s. So, I removed that article/table from the snapshot, and lo and behold, it works. So I was looking at the Schema of the table and in my identity column, the NOT FOR REPLICATION was set to TRUE. All my other tables have it set to FALSE. Could this be the source of the error? Also, I tried changing this to false via the GUI but got received a timeout error. Is there a script that allows me to change this? Thanks all.

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  • Merge sort versus quick sort performance

    - by Giorgio
    I have implemented merge sort and quick sort using C (GCC 4.4.3 on Ubuntu 10.04 running on a 4 GB RAM laptop with an Intel DUO CPU at 2GHz) and I wanted to compare the performance of the two algorithms. The prototypes of the sorting functions are: void merge_sort(const char **lines, int start, int end); void quick_sort(const char **lines, int start, int end); i.e. both take an array of pointers to strings and sort the elements with index i : start <= i <= end. I have produced some files containing random strings with length on average 4.5 characters. The test files range from 100 lines to 10000000 lines. I was a bit surprised by the results because, even though I know that merge sort has complexity O(n log(n)) while quick sort is O(n^2), I have often read that on average quick sort should be as fast as merge sort. However, my results are the following. Up to 10000 strings, both algorithms perform equally well. For 10000 strings, both require about 0.007 seconds. For 100000 strings, merge sort is slightly faster with 0.095 s against 0.121 s. For 1000000 strings merge sort takes 1.287 s against 5.233 s of quick sort. For 5000000 strings merge sort takes 7.582 s against 118.240 s of quick sort. For 10000000 strings merge sort takes 16.305 s against 1202.918 s of quick sort. So my question is: are my results as expected, meaning that quick sort is comparable in speed to merge sort for small inputs but, as the size of the input data grows, the fact that its complexity is quadratic will become evident? Here is a sketch of what I did. In the merge sort implementation, the partitioning consists in calling merge sort recursively, i.e. merge_sort(lines, start, (start + end) / 2); merge_sort(lines, 1 + (start + end) / 2, end); Merging of the two sorted sub-array is performed by reading the data from the array lines and writing it to a global temporary array of pointers (this global array is allocate only once). After each merge the pointers are copied back to the original array. So the strings are stored once but I need twice as much memory for the pointers. For quick sort, the partition function chooses the last element of the array to sort as the pivot and scans the previous elements in one loop. After it has produced a partition of the type start ... {elements <= pivot} ... pivotIndex ... {elements > pivot} ... end it calls itself recursively: quick_sort(lines, start, pivotIndex - 1); quick_sort(lines, pivotIndex + 1, end); Note that this quick sort implementation sorts the array in-place and does not require additional memory, therefore it is more memory efficient than the merge sort implementation. So my question is: is there a better way to implement quick sort that is worthwhile trying out? If I improve the quick sort implementation and perform more tests on different data sets (computing the average of the running times on different data sets) can I expect a better performance of quick sort wrt merge sort? EDIT Thank you for your answers. My implementation is in-place and is based on the pseudo-code I have found on wikipedia in Section In-place version: function partition(array, 'left', 'right', 'pivotIndex') where I choose the last element in the range to be sorted as a pivot, i.e. pivotIndex := right. I have checked the code over and over again and it seems correct to me. In order to rule out the case that I am using the wrong implementation I have uploaded the source code on github (in case you would like to take a look at it). Your answers seem to suggest that I am using the wrong test data. I will look into it and try out different test data sets. I will report as soon as I have some results.

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  • mail merge e-mail in Word 2007 with attachment

    - by kevyn
    Is there a simple way to mail merge with Word 2007 and add an attachment? I've searched google, and all results point to pasting in VB code. I want to a small team of novice users to be able to mail merge e-mails and add attachments. Does anyone know a simple way of doing this without code?

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  • Recommendations of mail merge freeware?

    - by Chris
    At work (Exchange server) our team often needs to send emails to 500+ partners. It's currently a very dull job, so I've tried the merge features in Office 2007. However, it can't: Include a merge field in the subject ("Regarding your account: ") Send to semi-colon separated addresses (one line might be "[email protected];[email protected];[email protected]") Send from a particular mailbox account, and store all the sent mails in Outlook. Can anyone recommend any free/affordable software which will work with Exchange and can be used commercially?

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  • Database Replication check script not running

    - by Tarun
    I'm trying to create a Database Replication checking script but I'm getting error while executing it. Here is the script #!/bin/bash PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin export PATH #Server Name Server="Test Server" #My Sql Username and Password User=root Password="a" #Maximum Slave Time Delay Delay="60" #File Path to store error and email the same Log_File=/tmp/replicationcheck.txt #Email Settings Subject="$Server Replication Error" Sender_Name=TestServer Recipients="[email protected]" #Mail Alert Function mailalert(){ sendmail -F $Sender_Name -it <<END_MESSAGE To: $Recipients Subject: $Subject $Message_Replication_Error `/bin/cat $Log_File` END_MESSAGE } #Show Slave Status Show_Slave_Status=`echo "show slave status \G;" | mysql -u $User -p$Password 2>&1` #Getting list of queries in mysql $Show_Slave_Status | grep "Last_" > $Log_File #Check if slave running $Show_Slave_Status | grep "Slave_IO_Running: No" if [ "$?" -eq "0" ]; then Message_Replication_Error="$Server Replication error please check. The Slave_IO_Running state is No." mailalert exit 1 else $Show_Slave_Status | grep "Slave_IO_Running: Connecting" if [ "$?" -eq "0" ]; then Message_Replication_Error="$Server Replication error please check. The Slave_IO_Running state is Connecting." mailalert exit 1 fi fi #Check if replication delayed Seconds_Behind_Master=$Show_Slave_Status | grep "Seconds_Behind_Master" | awk -F": " {' print $2 '} if [ "$Seconds_Behind_Master" -ge "$Delay" ]; then Message_Replication_Error="Replication Delayed by $Seconds_Behind_Master." mailalert else if [ "$Seconds_Behind_Master" = "NULL" ]; then Message_Replication_Error="$Server Replication error please check. The Seconds_Behind_Master state is NULL." mailalert fi fi

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  • Subversion - Do I need to reintegrate if I don't merge from trunk

    - by user314584
    Hi, I have read quite a bit about the need to re-integrate when you merge from a branch back to the trunk in SVN (This article was really helpful http://blogs.open.collab.net/svn/2008/07/subversion-merg.html). The problem seems to come from the fact that people are regularly updating the branch from the trunk which means that the final merge back is reflective. In my use-case, we want to create a release branch which will live for as long as it takes to stabilise the branch and fix any bugs. To maintain stability we don't want to merge up from the trunk but we do want to regularly merge fixes down from the release branch so that trunk gets all the bug fixes for free. We also don't want to wait until the end of QA to merge back to trunk. We therefore want to: 1.) Create the branch 2.) Make regular changes to the branch (and trunk) 3.) Merge back to trunk regularly (daily perhaps) Since we will never merge up from trunk I don't think that we need to worry about the problems that re-intergrating is designed to fix. Can anyone see a problem with this approach? Cheers, Matt

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  • MySQL Master-Master replication generating thousands of log files

    - by Andrew
    Today, I checked the /var/lib/mysql/ directory of a server in a master-master replication setup and noticed there were about 3,600 slave-relay.00xxxx files in there (where "xxxx" is an incrementing integer). They appear to be binary log files and don't take up much space (only about 42K), but are they an indication that something is wrong? They range in date from August until today with about 25 per day. Thanks for any help.

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  • Licensing for SQL Server Merge Replication via Web Syncronization

    - by user43330
    I am planning to implement a Sales force automation software where there will be 50 PDA devices having sql server CE 3.5 connecting via web sync merge replication to central SQL Server 2005 main Database via a IIS server. 1) IIS Server Win 2003 Server 2) SQL Server 2005 Standard 3) SQL CE 3.5 having in 50 PDA Devices. How many licenses are required for each Servers ? What is the licencing model

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  • SQL 2008 Replication

    - by sevenlamp
    I have replicated two database in SQL2008. The last two days the distribution database from publisher server changed to Suspect Mode and the replication process is down. I read a lot from Google and tried to repair, but without success. During my repairing process, the Distribution Database is has changed to Emergency mode. Can anyone please kindly suggest any solutions?

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  • Replication - between pools in the same system

    - by Steve Tunstall
    OK, I fully understand that's it's been a LONG time since I've blogged with any tips or tricks on the ZFSSA, and I'm way behind. Hey, I just wrote TWO BLOGS ON THE SAME DAY!!! Make sure you keep scrolling down to see the next one too, or you may have missed it. To celebrate, for the one or two of you out there who are still reading this, I got something for you. The first TWO people who make any comment below, with your real name and email so I can contact you, will get some cool Oracle SWAG that I have to give away. Don't get excited, it's not an iPad, but it pretty good stuff. Only the first two, so if you already see two below, then settle down. Now, let's talk about Replication and Migration.  I have talked before about Shadow Migration here: https://blogs.oracle.com/7000tips/entry/shadow_migrationShadow Migration lets one take a NFS or CIFS share in one pool on a system and migrate that data over to another pool in the same system. That's handy, but right now it's only for file systems like NFS and CIFS. It will not work for LUNs. LUN shadow migration is a roadmap item, however. So.... What if you have a ZFSSA cluster with multiple pools, and you have a LUN in one pool but later you decide it's best if it was in the other pool? No problem. Replication to the rescue. What's that? Replication is only for replicating data between two different systems? Who told you that? We've been able to replicate to the same system now for a few code updates back. These instructions below will also work just fine if you're setting up replication between two different systems. After replication is complete, you can easily break replication, change the new LUN into a primary LUN and then delete the source LUN. Bam. Step 1- setup a target system. In our case, the target system is ourself, but you still have to set it up like it's far away. Go to Configuration-->Services-->Remote Replication. Click the plus sign and setup the target, which is the ZFSSA you're on now. Step 2. Now you can go to the LUN you want to replicate. Take note which Pool and Project you're in. In my case, I have a LUN in Pool2 called LUNp2 that I wish to replicate to Pool1.  Step 3. In my case, I made a Project called "Luns" and it has LUNp2 inside of it. I am going to replicate the Project, which will automatically replicate all of the LUNs and/or Filesystems inside of it.  Now, you can also replicate from the Share level instead of the Project. That will only replicate the share, and not all the other shares of a project. If someone tells you that if you replicate a share, it always replicates all the other shares also in that Project, don't listen to them.Note below how I can choose not only the Target (which is myself), but I can also choose which Pool to replicate it to. So I choose Pool1.  Step 4. I did not choose a schedule or pick the "Continuous" button, which means my replication will be manual only. I can now push the Manual Replicate button on my Actions list and you will see it start. You will see both a barber pole animation and also an update in the status bar on the top of the screen that a replication event has begun. This also goes into the event log.  Step 5. The status bar will also log an event when it's done. Step 6. If you go back to Configuration-->Services-->Remote Replication, you will see your event. Step 7. Done. To see your new replica, go to the other Pool (Pool1 for me), and click the "Replica" area below the words "Filesystems | LUNs" Here, you will see any replicas that have come in from any of your sources. It's a simple matter from here to break the replication, which will change this to a "Local" LUN, and then delete the original LUN back in Pool2. Ok, that's all for now, but I promise to give out more tricks sometime in November !!! There's very exciting stuff coming down the pipe for the ZFSSA. Both new hardware and new software features that I'm just drooling over. That's all I can say, but contact your local sales SC to get a NDA roadmap talk if you want to hear more.   Happy Halloween,Steve 

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  • Robust fault tolerant MySQL replication

    - by Joshua
    Is there any way to get a fault tolerant MySQL replication? I am in an environment that has many networking issues. It appears that replication gets an error and just stops. I need it to continue to work and recover from these faults. There is some wrapper software that checks the state of replication and restarts it in the case of losing its log position. Is there an alternative? Note: Replication is done from an embedded computer with MySQL 4.1 to a external computer that has MySQL 5.0.45

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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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  • SVN Merge Question

    - by SVN
    Suppose that I have two massive folders in SVN: test and prod. I'm trying to use the following svn command to merge the content from test into prod: svn merge ./prod@HEAD ./test@HEAD ./prod However, my SVN repository is huge and this process takes an enormous amount of time. Is there any way that I can make a simpler merge statement which will be more processor friendly? Perhaps a server-URL based merge? Any insight is appreciated....

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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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  • Setting up MySQL database replication [without restarting mysql]

    - by FunkyChicken
    I'm trying to setup MySQL db replication, it seems pretty straight forward. I was using this tutorial: http://www.howtoforge.com/mysql_database_replication Now I run a rather large MySQL database for a very large website, and in this tutorial it asks me to restart MySQL to apply the new settings in the /etc/my.cnf file. I'm try to avoid that step at all costs, as I know that restarting MySQL can take a few minutes on my machine (due to large logs/dbs), and I don't want any downtime. Is there a way to apply the necessary settings WITHOUT fully restarting Mysql?

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