This thread is no longer active. I moved issue to a new, cleaner thread named: How can I get Transactional Republishing to work?
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I've tried for more than a week to figure this one out, but have not found a solution. I'm missing some critical information that perhaps someone can share. I'm desperate and embarassed that this has kept me stuck for so long. Thanks for any assistance.
In my simplist scenario, I'm transactionally replicating a single table from database A to database B and then from database B to database C. All databases are on the same XP server (in this simplist version of the problem). This is SQL 2005 RTM. Publication A to B replicates fine. Publication B to C can't even get the snapshot to work because I get the error:
Command attempted:
drop Table "dbo"."MyReplTable"
(Transaction sequence number: 0x00004174000000E100A300000000, Command ID: 41)
Error messages:
Cannot drop the table 'dbo.MyReplTable' because it is being used for replication. (Source: MSSQLServer, Error number: 3724) Get help: http://help/3724 (fyi - there is no help here)
I have a simple example script where I've renamed real names to fake names, that is exactly what I run to simulate the problem. Obviously the script is wrong, but where? I used the wizard to create the whole script (I know that is my first mistake ;-) ). After I start the snapshot jobs, I get the error above.
I presume that the sp_addarticle option @.pre_creation_cmd = N'drop' is part of the problem. I don't have row filters. Also, I want to be able to replicate schema modifications when necessary (like add a column or drop a column)
Perhaps the sp_addpublication @.repl_freq = N'continuous' option in the AtoB publication prevents the BtoC publication from ever getting a chance to do anything, if it never lets go of the table.
If it helps, here is my script with hopefully helpfully renamed objects. My real world scenario has many articles, but this is a simple version - 2 publications each having 1 article (the same table).
/****** Scripting replication configuration for server MyInstance. Script Date: 3/14/2006 11:16:58 AM ******/
/****** Please Note: For security reasons, all password parameters were scripted with either NULL or an empty string. ******/
/****** Installing the server MyInstance as a Distributor. Script Date: 3/14/2006 11:16:58 AM ******/
use master
exec sp_adddistributor @.distributor = N'MyInstance', @.password = N''
GO
exec sp_adddistributiondb @.database = N'distribution', @.data_folder = N'C:\Program Files\Microsoft SQL Server\MSSQL.2\MSSQL\Data', @.data_file_size = 4, @.log_folder = N'C:\Program Files\Microsoft SQL Server\MSSQL.2\MSSQL\Data', @.log_file_size = 2, @.min_distretention = 0, @.max_distretention = 72, @.history_retention = 48, @.security_mode = 1
GO
use [distribution]
if (not exists (select * from sysobjects where name = 'UIProperties' and type = 'U '))
create table UIProperties(id int)
if (exists (select * from ::fn_listextendedproperty('SnapshotFolder', 'user', 'dbo', 'table', 'UIProperties', null, null)))
EXEC sp_updateextendedproperty N'SnapshotFolder', N'C:\ThisFolder\MY2005DBWorking\repldata', 'user', dbo, 'table', 'UIProperties'
else
EXEC sp_addextendedproperty N'SnapshotFolder', 'C:\ThisFolder\MY2005DBWorking\repldata', 'user', dbo, 'table', 'UIProperties'
GO
exec sp_adddistpublisher @.publisher = N'MyInstance', @.distribution_db = N'distribution', @.security_mode = 1, @.working_directory = N'C:\ThisFolder\MY2005DBWorking\repldata', @.trusted = N'false', @.thirdparty_flag = 0, @.publisher_type = N'MSSQLSERVER'
GO
use [DatabaseA]
exec sp_replicationdboption @.dbname = N'DatabaseA', @.optname = N'publish', @.value = N'true'
GO
-- Adding the transactional publication
use [DatabaseA]
exec sp_addpublication @.publication = N'PubAtoB', @.description = N'Transactional publication of database ''DatabaseA'' from Publisher ''MyInstance''.', @.sync_method = N'concurrent', @.retention = 0, @.allow_push = N'true', @.allow_pull = N'true', @.allow_anonymous = N'true', @.enabled_for_internet = N'false', @.snapshot_in_defaultfolder = N'true', @.compress_snapshot = N'false', @.ftp_port = 21, @.ftp_login = N'anonymous', @.allow_subscription_copy = N'false', @.add_to_active_directory = N'false', @.repl_freq = N'continuous', @.status = N'active', @.independent_agent = N'true', @.immediate_sync = N'true', @.allow_sync_tran = N'false', @.autogen_sync_procs = N'false', @.allow_queued_tran = N'false', @.allow_dts = N'false', @.replicate_ddl = 1, @.allow_initialize_from_backup = N'false', @.enabled_for_p2p = N'false', @.enabled_for_het_sub = N'false'
GO
exec sp_addpublication_snapshot @.publication = N'PubAtoB', @.frequency_type = 1, @.frequency_interval = 0, @.frequency_relative_interval = 0, @.frequency_recurrence_factor = 0, @.frequency_subday = 0, @.frequency_subday_interval = 0, @.active_start_time_of_day = 0, @.active_end_time_of_day = 235959, @.active_start_date = 0, @.active_end_date = 0, @.job_login = null, @.job_password = null, @.publisher_security_mode = 1
use [DatabaseA]
exec sp_addarticle @.publication = N'PubAtoB', @.article = N'MyReplTable', @.source_owner = N'dbo', @.source_object = N'MyReplTable', @.type = N'logbased', @.description = null, @.creation_script = null, @.pre_creation_cmd = N'drop', @.schema_option = 0x000000000803509F, @.identityrangemanagementoption = N'manual', @.destination_table = N'MyReplTable', @.destination_owner = N'dbo', @.vertical_partition = N'false', @.ins_cmd = N'CALL sp_MSins_dboMyReplTable', @.del_cmd = N'CALL sp_MSdel_dboMyReplTable', @.upd_cmd = N'SCALL sp_MSupd_dboMyReplTable'
GO
--BEGIN: Script to be run at Publisher 'MyInstance'--
use [DatabaseA]
exec sp_addsubscription @.publication = N'PubAtoB', @.subscriber = N'MyInstance', @.destination_db = N'DatabaseB', @.subscription_type = N'Push', @.sync_type = N'automatic', @.article = N'all', @.update_mode = N'read only', @.subscriber_type = 0
exec sp_addpushsubscription_agent @.publication = N'PubAtoB', @.subscriber = N'MyInstance', @.subscriber_db = N'DatabaseB', @.job_login = null, @.job_password = null, @.subscriber_security_mode = 1, @.frequency_type = 64, @.frequency_interval = 0, @.frequency_relative_interval = 0, @.frequency_recurrence_factor = 0, @.frequency_subday = 0, @.frequency_subday_interval = 0, @.active_start_time_of_day = 0, @.active_end_time_of_day = 235959, @.active_start_date = 20060314, @.active_end_date = 99991231, @.enabled_for_syncmgr = N'False', @.dts_package_location = N'Distributor'
GO
--END: Script to be run at Publisher 'MyInstance'--
use [DatabaseB]
exec sp_replicationdboption @.dbname = N'DatabaseB', @.optname = N'publish', @.value = N'true'
GO
-- Adding the transactional publication
use [DatabaseB]
exec sp_addpublication @.publication = N'PubBtoC', @.description = N'Transactional publication of database ''DatabaseB'' from Publisher ''MyInstance''.', @.sync_method = N'concurrent', @.retention = 0, @.allow_push = N'true', @.allow_pull = N'true', @.allow_anonymous = N'true', @.enabled_for_internet = N'false', @.snapshot_in_defaultfolder = N'true', @.compress_snapshot = N'false', @.ftp_port = 21, @.ftp_login = N'anonymous', @.allow_subscription_copy = N'false', @.add_to_active_directory = N'false', @.repl_freq = N'continuous', @.status = N'active', @.independent_agent = N'true', @.immediate_sync = N'true', @.allow_sync_tran = N'false', @.autogen_sync_procs = N'false', @.allow_queued_tran = N'false', @.allow_dts = N'false', @.replicate_ddl = 1, @.allow_initialize_from_backup = N'false', @.enabled_for_p2p = N'false', @.enabled_for_het_sub = N'false'
GO
exec sp_addpublication_snapshot @.publication = N'PubBtoC', @.frequency_type = 1, @.frequency_interval = 0, @.frequency_relative_interval = 0, @.frequency_recurrence_factor = 0, @.frequency_subday = 0, @.frequency_subday_interval = 0, @.active_start_time_of_day = 0, @.active_end_time_of_day = 235959, @.active_start_date = 0, @.active_end_date = 0, @.job_login = null, @.job_password = null, @.publisher_security_mode = 1
use [DatabaseB]
exec sp_addarticle @.publication = N'PubBtoC', @.article = N'MyReplTable', @.source_owner = N'dbo', @.source_object = N'MyReplTable', @.type = N'logbased', @.description = null, @.creation_script = null, @.pre_creation_cmd = N'drop', @.schema_option = 0x000000000803509F, @.identityrangemanagementoption = N'manual', @.destination_table = N'MyReplTable', @.destination_owner = N'dbo', @.vertical_partition = N'false', @.ins_cmd = N'CALL sp_MSins_dboMyReplTable', @.del_cmd = N'CALL sp_MSdel_dboMyReplTable', @.upd_cmd = N'SCALL sp_MSupd_dboMyReplTable'
GO
--BEGIN: Script to be run at Publisher 'MyInstance'--
use [DatabaseB]
exec sp_addsubscription @.publication = N'PubBtoC', @.subscriber = N'MyInstance', @.destination_db = N'DatabaseC', @.subscription_type = N'Push', @.sync_type = N'automatic', @.article = N'all', @.update_mode = N'read only', @.subscriber_type = 0
exec sp_addpushsubscription_agent @.publication = N'PubBtoC', @.subscriber = N'MyInstance', @.subscriber_db = N'DatabaseC', @.job_login = null, @.job_password = null, @.subscriber_security_mode = 1, @.frequency_type = 64, @.frequency_interval = 0, @.frequency_relative_interval = 0, @.frequency_recurrence_factor = 0, @.frequency_subday = 0, @.frequency_subday_interval = 0, @.active_start_time_of_day = 0, @.active_end_time_of_day = 235959, @.active_start_date = 20060314, @.active_end_date = 99991231, @.enabled_for_syncmgr = N'False', @.dts_package_location = N'Distributor'
GO
--END: Script to be run at Publisher 'MyInstance'--
The reason I ask this is because transactional replication is not designed for a republishing scenario. It can be done, but it involves a lot of hacks and so forth. Merge replication is typically used, and designed, for republishing scenario.
Maybe I should ask what your business needs are, and then we can discuss a solution.
|||This is the nature of the system I've inherited. I'll represent the A,B,C level as servers because in reality, they often are a server with a single database.
The process thinking is that multiple Level B servers on other servers, spread the processing burden of moving the data from A to C. The C servers generally are physically clustered in the same general geographic area as the B server from which they source their data. Realistically, the A server might be feeding data to multiple B servers which in turn feed multiple C servers.
I hope that clarifies it for you. You can see that my little test scenario is much simplified from the physical reality. Our existing SQL 2000 replication makes use of both transactional and merge replication in this environment. I've only had light experience with transactional replication and not with either merge or republishing.
|||Hi,
From your description, I assume you saw the error message from distribution agent, when replicating from B to C. Because you set @.pre_creation_cmd = N'drop', distribution agent needs to drop the table at C because it can replicate other transactions. But for some reason, this table is marked published.
So my question is: have you use DatabaseC as publisher? If it is the case, this may be the reason.
Peng
|||Peng,
For the moment, I'm back to working on my actual script (vs the sample one). I can tell you that I do not have DatabaseC as a publisher in my actual script. However, I will need to make it a publisher because there is one more replication layer that I did not mention. Practically every table will be transactionally replicated to another server (DatabaseD) to support another process.
This is the way we are actually doing things in production now, in SQL 2000, without error.
Paul
|||I've just discovered that SQL 2000 replication was probably interfering with my SQL 2005 replication, so I removed SQL 2000 from my workstation (except for Virtual PC) and will try to work on this again tomorrow to see if anything has changed.
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