Transaction Log Shipping Over WAN With Compression
Jan 18, 2006
Hi guys,
I have a server in a datacenter (SQL 2005 ent) that collects large quantities of data from our visitors. I need to set up a secondary database in our office (different geographic location) that will server 2 purposes, 1, a backup of the database and 2, allow us to perform complex queries on the data.
There is no updating of the data on the secondary server so no changes need to go back to the primary server. A database in standby mode is fine and users on the secondary server can be disconnected when it's being updated.
I have transaction log shipping working well in a staging environment (LAN). My first question is is there any reason why transaction log shipping would not work over a WAN with a VPN connection?
And my second question is can I compress the trn files for transport over the WAN. If I manually compress the files with winzip they compress by 98%. That translates into a huge saving when I am leasing a line to transport these files.
Thanks in advance
Stephen
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Jan 14, 2003
Has anyone tried compressing/uncompressing transaction log files when implementing log shipping?
I saw an article on SQL Lite Speed product, which supports compression with log shipping, I was trying to do it without any third party product.
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Feb 22, 2004
Hi,
We currently have a couple a large Databases running on SQL 2000 SP3 Clustered Windows 2000 SP3 environment.
Log Shipping is enabled for both databases shipping to a Standalone SQL 2000 SP3 Windows 2000 SP3 box.
Log Shipping occurs every 15 mins with the Transaction Files on average being no more than 500KB in size. However, every now and then a Transaction Log comes through and it can be as big as 3.52GB.
Not sure why this is happening. Anyone got any ideas?
Regards
Paul Towler
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Jul 23, 2005
I am going through a security audit on our servers. We use log shippingfor a standby database. One of the questions in the audit has melooking for answers."Are the transaction logs that are being shipped to the standbydatabase encrypted?"I am assuming no. However, I need to know definitively. I have not beenable to find an answer in BOL or in Google. If the logs are notencrypted, is there an option where I could send them encrypted, ifnecessary?Thanks,Jennie
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Dec 10, 2007
Greetings:
When I script out my log shipping configuration from the GUI and subsequently drop the log shipping and try to recreate it with the created script, the backup and restore functions do not seem to be working; please see script below. Is there an additional step (or steps) that the SSMS GUI does not output when it creates the script for log shipping? I noticed in the GUI after I run the script that the destination folder for copied files is blank as well.
Example error from backup/restore job - Error: The path is not of a legal form.(mscorlib)
-- Execute the following statements at the Primary to configure Log Shipping
-- for the database [rdevsql2].[SymbolLookUp],
-- The script needs to be run at the Primary in the context of the [msdb] database.
-------------------------------------------------------------------------------------
-- Adding the Log Shipping configuration
-- ****** Begin: Script to be run at Primary: [rdevsql2] ******
DECLARE @LS_BackupJobId AS uniqueidentifier
DECLARE @LS_PrimaryId AS uniqueidentifier
DECLARE @SP_Add_RetCode As int
EXEC @SP_Add_RetCode = master.dbo.sp_add_log_shipping_primary_database
@database = N'SymbolLookUp'
,@backup_directory = N'm:ackups'
,@backup_share = N'\rdevsql2m$ackups'
,@backup_job_name = N'LSBackup_SymbolLookUp'
,@backup_retention_period = 60
,@monitor_server = N'RDEVSQL1'
,@monitor_server_security_mode = 1
,@backup_threshold = 60
,@threshold_alert_enabled = 1
,@history_retention_period = 60
,@backup_job_id = @LS_BackupJobId OUTPUT
,@primary_id = @LS_PrimaryId OUTPUT
,@overwrite = 1
,@ignoreremotemonitor = 1
IF (@@ERROR = 0 AND @SP_Add_RetCode = 0)
BEGIN
DECLARE @LS_BackUpScheduleUID As uniqueidentifier
DECLARE @LS_BackUpScheduleID AS int
EXEC msdb.dbo.sp_add_schedule
@schedule_name =N'LSBackupSchedule_rdevsql21'
,@enabled = 1
,@freq_type = 4
,@freq_interval = 1
,@freq_subday_type = 4
,@freq_subday_interval = 1
,@freq_recurrence_factor = 0
,@active_start_date = 20071207
,@active_end_date = 99991231
,@active_start_time = 0
,@active_end_time = 235900
,@schedule_uid = @LS_BackUpScheduleUID OUTPUT
,@schedule_id = @LS_BackUpScheduleID OUTPUT
EXEC msdb.dbo.sp_attach_schedule
@job_id = @LS_BackupJobId
,@schedule_id = @LS_BackUpScheduleID
EXEC msdb.dbo.sp_update_job
@job_id = @LS_BackupJobId
,@enabled = 1
END
EXEC master.dbo.sp_add_log_shipping_primary_secondary
@primary_database = N'SymbolLookUp'
,@secondary_server = N'RDEVSQL1'
,@secondary_database = N'SymbolLookUp'
,@overwrite = 1
-- ****** End: Script to be run at Primary: [rdevsql2] ******
-- ****** Begin: Script to be run at Monitor: [RDEVSQL1] ******
EXEC rdevsql1.msdb.dbo.sp_processlogshippingmonitorprimary
@mode = 1
,@primary_id = N'4d80db8c-e090-4dc0-8af6-d5f5802c4207'
,@primary_server = N'rdevsql2'
,@monitor_server = N'RDEVSQL1'
,@monitor_server_security_mode = 1
,@primary_database = N'SymbolLookUp'
,@backup_threshold = 60
,@threshold_alert = 14420
,@threshold_alert_enabled = 1
,@history_retention_period = 60
-- ****** End: Script to be run at Monitor: [RDEVSQL1] ******
-- Execute the following statements at the Secondary to configure Log Shipping
-- for the database [RDEVSQL1].[SymbolLookUp],
-- the script needs to be run at the Secondary in the context of the [msdb] database.
-------------------------------------------------------------------------------------
-- Adding the Log Shipping configuration
-- ****** Begin: Script to be run at Secondary: [RDEVSQL1] ******
DECLARE @LS_Secondary__CopyJobId AS uniqueidentifier
DECLARE @LS_Secondary__RestoreJobId AS uniqueidentifier
DECLARE @LS_Secondary__SecondaryId AS uniqueidentifier
DECLARE @LS_Add_RetCode As int
EXEC @LS_Add_RetCode = rdevsql1.master.dbo.sp_add_log_shipping_secondary_primary
@primary_server = N'rdevsql2'
,@primary_database = N'SymbolLookUp'
,@backup_source_directory = N'\rdevsql2m$ackups'
,@backup_destination_directory = N''
,@copy_job_name = N''
,@restore_job_name = N''
,@file_retention_period = 4320
,@monitor_server = N'RDEVSQL1'
,@monitor_server_security_mode = 1
,@overwrite = 1
,@copy_job_id = @LS_Secondary__CopyJobId OUTPUT
,@restore_job_id = @LS_Secondary__RestoreJobId OUTPUT
,@secondary_id = @LS_Secondary__SecondaryId OUTPUT
IF (@@ERROR = 0 AND @LS_Add_RetCode = 0)
BEGIN
DECLARE @LS_SecondaryCopyJobScheduleUID As uniqueidentifier
DECLARE @LS_SecondaryCopyJobScheduleID AS int
EXEC rdevsql1.msdb.dbo.sp_add_schedule
@schedule_name =N'DefaultCopyJobSchedule'
,@enabled = 1
,@freq_type = 4
,@freq_interval = 1
,@freq_subday_type = 4
,@freq_subday_interval = 15
,@freq_recurrence_factor = 0
,@active_start_date = 20071207
,@active_end_date = 99991231
,@active_start_time = 0
,@active_end_time = 235900
,@schedule_uid = @LS_SecondaryCopyJobScheduleUID OUTPUT
,@schedule_id = @LS_SecondaryCopyJobScheduleID OUTPUT
EXEC rdevsql1.msdb.dbo.sp_attach_schedule
@job_id = @LS_Secondary__CopyJobId
,@schedule_id = @LS_SecondaryCopyJobScheduleID
DECLARE @LS_SecondaryRestoreJobScheduleUID As uniqueidentifier
DECLARE @LS_SecondaryRestoreJobScheduleID AS int
EXEC rdevsql1.msdb.dbo.sp_add_schedule
@schedule_name =N'DefaultRestoreJobSchedule'
,@enabled = 1
,@freq_type = 4
,@freq_interval = 1
,@freq_subday_type = 4
,@freq_subday_interval = 15
,@freq_recurrence_factor = 0
,@active_start_date = 20071207
,@active_end_date = 99991231
,@active_start_time = 0
,@active_end_time = 235900
,@schedule_uid = @LS_SecondaryRestoreJobScheduleUID OUTPUT
,@schedule_id = @LS_SecondaryRestoreJobScheduleID OUTPUT
EXEC rdevsql1.msdb.dbo.sp_attach_schedule
@job_id = @LS_Secondary__RestoreJobId
,@schedule_id = @LS_SecondaryRestoreJobScheduleID
END
DECLARE @LS_Add_RetCode2 As int
IF (@@ERROR = 0 AND @LS_Add_RetCode = 0)
BEGIN
EXEC @LS_Add_RetCode2 = rdevsql1.master.dbo.sp_add_log_shipping_secondary_database
@secondary_database = N'SymbolLookUp'
,@primary_server = N'rdevsql2'
,@primary_database = N'SymbolLookUp'
,@restore_delay = 0
,@restore_mode = 0
,@disconnect_users = 0
,@restore_threshold = 45
,@threshold_alert_enabled = 1
,@history_retention_period = 60
,@overwrite = 1
END
IF (@@error = 0 AND @LS_Add_RetCode = 0)
BEGIN
EXEC rdevsql1.msdb.dbo.sp_update_job
@job_id = @LS_Secondary__CopyJobId
,@enabled = 1
EXEC rdevsql1.msdb.dbo.sp_update_job
@job_id = @LS_Secondary__RestoreJobId
,@enabled = 1
END
-- ****** End: Script to be run at Secondary: [RDEVSQL1] ******
help is much appreciated,
Derek
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Aug 7, 2015
Log shipping was configured 6 months back. A Transaction log file got corrupted today. How to resolve this?
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Sep 21, 2007
Hello,
We have log-shipping set up between a source and 3 destination SS 2000 databases. Two of the destination servers actually perform their log restores across the network from the other secondary server. This allows us to only copy the files once from a remote location. All three servers stay caught up within 15 minutes of each other.
Recently, I added a fourth server to this that has SS 2005 SP2 (X64). I wrote a stored procedure that restores log backups from the same single location as the maintenance plan jobs. The problem that I'm experiencing is that this fourth server is not keeping up with the other three. It seems to take longer to restore the same log backups. The destination servers are all on the same domain. This fourth server was previously part of the same maintenance plan configuration as the others prior to rebuilding it for SS 2005 SP2 (X64). During that time, it stayed caught up with the other servers. There is another database on the new server that I am log-shipping to in the same manner and it stays caught up, though, for the most part, the log backups are smaller. There is a file on the fourth server with a ckp extension for the database in question that doesn't seem to exist for the other databases on this server and the other servers.
Any information on this behavior would be appreciated.
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Apr 23, 2008
I am new to this environment and was asked to ensure that the transaction log shipping for SQL 2005 on W2K3 boxes is working properly. I noticed the db's on the secondary server are show "Restoring..." I am not sure if these were set up in No Recover Mode or Standby Mode. I have no access to the secondary db's. I get an error message when trying to access them (error 927). Monitoring was not set up initially and as you may or may not know can't be turned on after the fact...unless you delete the job and start over.
My question is is "Restoring..." normal and what does it indicate?
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Aug 21, 2007
Hi,
I currently have a 2000 Ent. production server and a stand by server ready for transaction log shipping.
Is it possible to setup transaction log shipping on a live environment without any interruptions?
I'm currently backing up the log every 1 hour, I'd like to increase to 15 minutes.
Any help would greatly be appreciated.
Thanks,
- Gary
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Feb 4, 2008
Hi,
Im in the process of setting up logshipping on sqlserver 2005 enterprise edition.
My scenario is like this:
My Avg size of my tlog is 500MB and im planning to set the log shipping at 30mins interval(ie backup job schedule,Copy,restore job schedule).But at some part of the day the Tlog suddenly increases up to 1.5GB - 2 GB .So i wanted to know, wht if that 1.5GB-2GB tlog file is unable to get backed up,copy and restore at 30mins interval?.How to deal with this kind of issues where the size of tlogs are increased suddenly.I cannot do it at15mins interval due to some network restrictions at my office.
i have One more doubt about the setting on Logshipping screen:
Now let us suppose my settting on log shipping screen 'Alert if no restore occurs within' is set to '180mins', then does this setting mean that the restore job will keep on looking for the copied file in the folder on secondary for next 90mins and if its not able to find any, it will generate an alert after 90mins ??? or it will generate an error if its nt able to find any copied file after the first restore job execution.???
in the same way,
Thnx in advance for any help.
Regards
Arvind L
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Jun 23, 2007
I'm experiencing a weird problem with log shipping in SQL 2005.
I've setup Log Shipping for a production database between two sites. The standby database is being updated correctly and everything seems to be working as expected but for one detail: the name of the transaction log backups are generated with an UTC timestamp instead of my local timezone.
The the data below extracted from the backup history:
2007-06-23 17:30:00.000 D:BackupDatabasesmydbmydb_20070623073000.trn
2007-06-23 17:15:00.000 D:BackupDatabasesmydbmydb_20070623071500.trn
2007-06-23 17:00:00.000 D:BackupDatabasesmydbmydb_20070623070000.trn
2007-06-23 16:45:00.000 D:BackupDatabasesmydbmydb_20070623064500.trn
My timezone here is GMT+10.
Although it's not affecting Log Shipping, it's very confusing as the full backups have a timestamp in the local timezone!
Has anyone seen experienced something similar to this? Please see below my SQL details:
1 ProductName NULL Microsoft SQL Server
2 ProductVersion 589824 9.00.3042.00
3 Language 1033 English (United States)
4 Platform NULL NT AMD64
5 Comments NULL NT AMD64
6 CompanyName NULL Microsoft Corporation
7 FileDescription NULL SQL Server Windows NT - 64 Bit
8 FileVersion NULL 2005.090.3042.00
9 InternalName NULL SQLSERVR
10 LegalCopyright NULL © Microsoft Corp. All rights reserved.
11 LegalTrademarks NULL Microsoft® is a registered trademark of Microsoft Corporation. Windows(TM) is a trademark of Microsoft Corporation
12 OriginalFilename NULL SQLSERVR.EXE
13 PrivateBuild NULL NULL
14 SpecialBuild 199360512 NULL
15 WindowsVersion 248381957 5.2 (3790)
16 ProcessorCount 4 4
17 ProcessorActiveMask 4 f
18 ProcessorType 8664 NULL
19 PhysicalMemory 4095 4095 (4294037504)
20 Product ID NULL NULL
Thanks,
André
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Oct 12, 2015
I've got log shipping set up, and everything seems to be working fine, but the log files are not being deleted from the primary server despite configuring log shipping to retain them for 3 days. Â I see no errors concerning the log shipping, but did not configure a monitor. What process is responsible for deleting the older log backups, and how can I look for errors. Â I could simply set up a jog to delete the older files, but that will only mask the issue.
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Jul 16, 2015
Out of using stored procedure, reports and all this staff, I want to know the possible way to make sure that the data inside my Secondary Server Read only database are same as data in my primary server database.
So what is the simple way to do this check?
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Jun 18, 2015
I received an alert from one of my two secondary servers (all servers are running 2012 SP1):
File 'E:SQLMS SQL ServerMSSQL11.MSSQLSERVERMSSQLDATAMyDatabaseName_DateTime.tuf' is not a valid undo file for database 'MyDatabaseName (database ID 8). Verify the file path, and specify the correct file.
The detail in the job step shows this additional information:
*** Error: Could not apply log backup file 'MyDatabaseName_DateTime.trn' to secondary database 'MyDatabaseName'.(Microsoft.SqlServer.Management.LogShipping) ***
*** Error: Table error: Page (0:0). Test (m_headerVersion == HEADER_7_0) failed. Values are 0 and 1.
Table error: Page (0:0). Test ((m_type >= DATA_PAGE && m_type <= UNDOFILE_HEADER_PAGE) || (m_type == UNKNOWN_PAGE && level == BASIC_HEADER)) failed. Values are 0 and 0.
Table error: Page (0:0). Test (m_freeData >= PageHeaderOverhead () && m_freeData <= (UINT)PAGESIZE - m_slotCnt * sizeof (Slot)) failed. Values are 0 and 8192.
Starting a few minutes later, the Agent Job named LSRestore_MyServerName_MyDatabaseName fails every time it runs. The generated log backup, copy, and restore jobs run every 15 minutes.
I fixed the immediate problem by running a copy-only full backup on the primary, deleting the database on the secondary and restoring the new backup on the secondary with NORECOVERY. The restore job now succeeds and all seems fine. The secondaries only exists for DR purposes - no one runs reports against them or uses them at all. I had a similar problem last weekend on a different database that is also replicated between the same servers. I've been here for over a year, and these are the first instances of this problem that I've seen. However, I've now seen it twice in a week on the same server.
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Oct 2, 2014
I have a scenario where a customer is going to be using Log Shipping to the DR site; however, we need to maintain the normal backup strategy on the current system. (i.e. Nightly Full, Every 6 Hour Differential and Hourly Transaction Log backup)I know how to setup Transaction Log Shipping and Fail-over to DR and backup but now the local backup strategy is going to be an issue. I use the [URL] .... maintenance solution currently.
Is it even possible to do regular backups locally keeping data integrity for your backup strategy with Transaction Log Shipping enabled?
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May 13, 2007
Hi
I could not able to find Forums in regards to 'Log Shipping' thats why posting this question in here. Appriciate if someone can provide me answers depends on their experience.
Can we switch database recovery model when log shipping is turned on ?
We want to switch from Full Recovery to Bulk Logged Recovery to make sure Bulk Insert operations during the after hours load process will have some performance gain.
Is there any possibility of loosing data ?
Thanks
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Apr 2, 2004
Hello,
I have been wanting to compress my database. I am not really sure how this is done. I was looking on Enterprise Mangr. and if you right click on the db and go to all tasks, there is an option to shrink database. Is this the way you would compress your database, or are there other ways of doing this?
Thanks for all the help.
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Jan 17, 2001
Does DTS do any data compression when transferring data from a table on Server A to another table on server B?
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Can anyone tell me whether there is any data compression in SQL6.5. Have concerns with network traffic, and was wondering if data compression was a function SQL6.5, or if the data compression have to be coded into the actual database?
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Apr 10, 2008
Hi all,
My application send/retrieve large data from and to the database over the internet. Is there anyway or method that i can compress the query before submit to database server? really appreciate any advice and comments.
regards
Desmond
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Sep 15, 2005
We have run some tests on our application. Average message is about 2.5 MB. Messages are send once every 30 minutes. This is 3.5 Gb per month for one site. Now we already have three sites that will be sending this messages. This will be VERY high load on the WAN channel, and will cost us a LOT of money .
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Does SQL Server replication impliment any kind of compression? It seems to me that this would be very helpful for congested WAN links and costly merge replication.
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Dec 19, 2006
Hi, I was looking for a column compression functionality in SQL Server Compact and it seems that it doesn't exist (maybe I'm wrong?). I wonder if the SQL Server Team plan to implement column compression and if yes, when can we expect it?Thank you for your help!
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Jun 8, 2006
Hi,
I 'm sure I am missing something obvious, hopefully someone could point it out. After a failover log shipping, I want to fail back to my inital Primary server database; however, my database is marked as loading. How can I mark it as normal?
I did the failover as follow:
I did a failover log shipping from the 2 server Sv1 (Primary) and Sv2 (Secondary) by doing the following
1) Stop the primary database by using sp_change_primary_role (Sv1)
2) Change the 2nd server to primary server by running sp_change_secondary_role (Sv2)
3) Change the monitor role by running sp-change_monitor_role (Sv2)
4) Resolve the log ins - (Sv2)
5) Now I want to fail back - I copy the TRN files to Sv1 - use SQL Ent to restore the database at point in time. The task is done; however, the database is still mark as loading. I could not use sp_dboption.
I appreciate any suggestion.
Thanks in advance
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Jun 19, 2007
Hi All
I have a database which is 72GB, which is backed up every night as part of the maintenance plan. I have plenty of storage space, and the server that runs the database is fairly powerful (quad-processor 3.2ghz, 64bit, 48GB RAM) and is part of an active-passive cluster. The database backup is also copied to a SAN location.
My issue is with the size of the backup file. As part of the Disaster Recovery plan, I need to copy this database backup file accross the network to a remote site, so that in the event of a disaster at the site, business can continue at the remote site after restoring the database backup file. However, my database backup file is so big that I cannot copy it accross the network in time for the next morning. I have tried using WinRar and have managed to achieve a file about 20% of its original size, but it takes 2 hours to produce this file.
Is there any recommended reeading for this type of issue? Log shipping / mirroring has been investigated and will be part of the DR model but the 'powers that be' insist on having a full copy performed to the remote site.
Any suggestions? Thanks in advance guys n gals :-)
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Jul 26, 2015
I am wanting to use backup compression on a few sql servers (2008R2 and 2012). I have never touched compression before and always just gone with the default.I use Ola Hallengren's scripts to do the backups which, if not specifically specified, will use the server default.Backups (FULL and LOG) have been happening successfully on these servers for years.SQL won't care that the previous backup in the set was uncompressed or that the hourly transaction log backups previously taken were uncompressed?Restore statements (T-SQL) will be identical?From everything I am reading it is simply a case of setting the configuration and acting like nothing changed but I just wanted to be 100% certain.1 of the servers is a SharePoint backend.All of the backup files from all servers are picked up by Commvault backup system.
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Dec 14, 2006
I have a report being utilized for return address labels, conforming to Avery 5167. I have tried designing both as a table and as data in rectangles. Since these are return labels their is only one instance of data replicated for all textboxes, therefore the columns are of consistant length.
The report has seven columns of precise measurement, the data filled colums are set as 1.75in, 0.25in, and between the data columns are blank columns set to .3125in, 0.25in. I have also tried to fill data into the blank colums and set the font color to white. All report margins are set to 0in and the table location is 0.04167in, 0.125in. all textboxes have the properties for increase/decrease to accomadate turned off.
The biggest issue I am having is in printing from the deployed report versus printing while designing. I have adjusted for the glitch in margins for RS2005 and have printed succussfully prior to deployment to adhere to the specific measures for the label, report margins and textbox height and width and blank column spacing.
However, after deploying the report the data spacing seems to be compressed when printed. I am not getting the same measure between data fields as I had when designing the report. The entire printout seems to be slightly compressed.
When printed from design colums 1,3,5, and 7 start respectively at .3125in,2.375in,4.3756in,6.4375in from the edge of the page.
When printed fromt he deployed report columns 1,3,5 and7 start respectively at .3125in,2.3125in,4.28125in,6.28125in.
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