/*============================================================

// Source via Bradley Ball :: [email protected]

// MIT License

// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ""Software""), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY

==============================================================*/

/*

--Full Recovery and the transaction log

1. perform a full backup

2. perform a log backup

3. look at the log using dbcc sqlperf & dbcc loginfo

4. do an index rebuild

5. backup the log file

6. Look at the size of the log file & dbcc sqlperf

7. do an index rebuild

8. look at the used space in the using sqlperf

9. do a checkpoint

10. look at the used space using sql perf

11. do a full backup

12. look at the used space using sql perf

13. do a log backup

14. start a transaction to insert some rows

15. look at the log space using sql perf

16. do a log backup

17. look at sql perf again

18. commit the tran

19. look at sql perf

20. do a log backup

--Piecemeal recovery

1. do a full backup

2. restore fgs primary, 1, 2,3, 4

3. do a query that hits fg1, fg2, fg3, fg4,& fg5

4. finish the restore

*/

/*

Let's Take a full backup of

our Database in Full Recovery

and then take a log backup

*/

BACKUP DATABASE demoInternals_Partition TO DISK=N'/var/opt/mssql/data/demoInternals_Partition.bak' WITH INIT, stats=10

GO

BACKUP LOG demoInternals_Partition TO DISK=N'/var/opt/mssql/data/demoInternals_Partition1.trn' WITH INIT, stats=10

GO

/*

Look at the log

*/

DBCC SQLPERF(LOGSPACE)

GO

USE demoInternals_Partition

GO

DBCC LOGINFO

/*

Let's rebuild an index and create some logged records

*/

USE demoInternals_Partition

GO

DBCC SQLPERF(LOGSPACE)

GO

ALTER INDEX PK_myTable1_myID ON dbo.myTable1 REBUILD

GO

DBCC SQLPERF(LOGSPACE)

GO

/*

Backup the Log and check the sqlperf stats

*/

checkpoint

BACKUP LOG demoInternals_Partition TO DISK=N'/var/opt/mssql/data/demoInternals_Partition2.trn' WITH INIT, stats=10

GO

DBCC SQLPERF(LOGSPACE)

GO

/*

Rebuild the index and try a checkpoint

*/

ALTER INDEX PK_myTable1_myID ON dbo.myTable1 REBUILD

GO

DBCC SQLPERF(LOGSPACE)

GO

/*

let's see if a checkpoint will clear the log

*/

CHECKPOINT

GO

DBCC SQLPERF(LOGSPACE)

GO

/*

do I really need to to transaction log

backups can't I just do a full backup on the DB in full

recovery model and that will clear the log?

*/

BACKUP DATABASE demoInternals_Partition TO DISK=N'/var/opt/mssql/data/demoInternals_Partition.bak' WITH INIT, stats=10

GO

DBCC SQLPERF(LOGSPACE)

GO

/*

Backup our Log

*/

BACKUP LOG demoInternals_Partition TO DISK=N'/var/opt/mssql/data/demoInternals_Partition3.trn' WITH INIT, stats=10

GO

DBCC SQLPERF(LOGSPACE)

GO

/*

--EXECUTE IN ANOTHER WINDOW

--Imitate inserts or long running index rebuilds

DECLARE @i INT

SET @i=0

BEGIN TRAN

WHILE (@i<20000)

BEGIN

INSERT INTO myTable1 DEFAULT VALUES;

SET @i = @i +1

END

--COMMIT TRAN

*/

DBCC SQLPERF(LOGSPACE)

GO

BACKUP LOG demoInternals_Partition TO DISK=N'/var/opt/mssql/data/demoInternals_Partition3.trn' WITH INIT, stats=10

GO

DBCC SQLPERF(LOGSPACE)

GO

dbcc loginfo

/*

Commit the transaction on the

Other window

*/

DBCC SQLPERF(LOGSPACE)

GO

BACKUP LOG demoInternals_Partition TO DISK=N'/var/opt/mssql/data/demoInternals_Partition3.trn' WITH INIT, stats=10

GO

DBCC SQLPERF(LOGSPACE)

GO