Are log records removed from ldf file for rollbacks?

Posted by TiborKaraszi on SQL Blog See other posts from SQL Blog or by TiborKaraszi
Published on Mon, 22 Mar 2010 09:34:00 GMT Indexed on 2010/03/22 14:11 UTC
Read the original article Hit count: 292

Filed under:

backup

|

Transaction log

Seems like a simple enough question, right? This question (but more targeted, read on) was raised in an MCT forum. While the discussion was on-going and and I tried to come up with answers, I realized that this question are really several questions. First, what is a rollback? I can see three different types of rollbacks (there might be more, of course): Regular rollback, as in ROLLBACK TRAN (or lost/terminated connection) Rollback done by restore recovery. I.e., end-time of backup included some transaciton...(read more)

© SQL Blog or respective owner

Related posts about backup

backup exec - backup to disk offline

as seen on Server Fault - Search for 'Server Fault'
Hi We are running backup exec 9.1 doing a backup to disk to portable hard disk drives. When we run the backup manually it works fine. But when the backup is setup to run in the evening on a schedule it does not run as the backup to disk folders goes offline and therefore has to be switched back… >>> More
Ideal backup appliance for backup software like Bacula?

as seen on Server Fault - Search for 'Server Fault'
I'm at a small company and we (the IT department of two) manage <100 client computers and a handful of servers. Currently we're using a company's appliance to handle backup; it does a small backup every night and a full backup every weekend, and a guy comes on Wednesday to take an offsite backup… >>> More
Symantec Backup Exec Error on backup

as seen on Server Fault - Search for 'Server Fault'
Recently we have moved some of servers from real servers- into virtual servers. Since then, we are getting errors like the following: Error category : Resource ErrorsError : e000fed1 - A failure occurred querying the Writer status. For additional information regarding this error refer… >>> More
Windows Server Backup - Recover only shows the latest backup

as seen on Server Fault - Search for 'Server Fault'
We're having quite some trouble at work using Windows Server Backup. We have a HyperV server (Win 2008) running 8 virtual web servers, these are running a variety of OS'es: Win 2003, Win 2008 and a lone Debian. Each virtual server has a separate partition on the physical HyperV server, so e.g. E:… >>> More
Failed Backup Job With Backup Exec 12 and AOFO

as seen on Server Fault - Search for 'Server Fault'
I am backing up a Windows 2003 Small Business Server with SP2. We are running Backup Exec 12 with SP4. Recently the backup job started failing on backing up the system state with the following error: V-79-57344-34110 - AOFO: Initialization failure on: "System?State". Advanced Open File Option… >>> More

Related posts about Transaction log

Protecting against transaction concurency (Transaction type; Transaction IsolationLevel)

as seen on Stack Overflow - Search for 'Stack Overflow'
Middle-tier component will execute the data access routines in application. The component will call several SQL Server stored procedures to perform database updates. All of these procedure calls run under the control of a single transaction. The code for the middle-tier will implement the following… >>> More
Commit in SQL

as seen on Oracle Blogs - Search for 'Oracle Blogs'
SQL Transaction Control Language Commands (TCL) (COMMIT) Commit… >>> More
Logrotate not doing any rotation

as seen on Super User - Search for 'Super User'
I just set up LogRotate on my RHEL6 server so that it rotates my custom Apache log files. However, it doesn't do anything when i try manually running it. I expect it to rotate the log files "access.log" and "err.log". They have been there for a few days and need to be rotated. Here is the output: [root@pc1… >>> More
ORA-03113 in code. In addition, TNS-12535 and ORA-03137 in alert file

as seen on Stack Overflow - Search for 'Stack Overflow'
I've got an exception that contain ORA-03113: (SiPPSS.GetPrintWorkDirectDetail) - ERR:ORA-03113: end-of-file on communication channel Process ID: 7448 Session ID: 30 Serial number: 9802 ?????:12110937 ????:T855 Oracle.DataAccess.Client.OracleException ORA-03113: end-of-file on communication channel… >>> More
PostgreSQL 8.4 won't start after blackout

as seen on Server Fault - Search for 'Server Fault'
I have problem with starting PostgreSQL 8.4 on Ubuntu 9.10 Server after blackout. When I try to connect to the database it says: psql: server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request. When I try to start it by… >>> More