Questions tagged [recovery]

Reconstructing a database.

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51
votes
3answers
83k views

How do I get back some deleted records?

I mistakenly deleted around 2,000,000 records from a remote SQL Server 2008 table. The server is not granting me access to the backup files on the server side. Is there any way to get back these ...
15
votes
1answer
55k views

Recover MySQL database from data folder without ibdata1 from ibd files

My WAMP directory accidentally get deleted by another user. Only data folder in MySQLis available. And, in that only database-folders (folders in "\bin\mysql\mysql5.6.12\data\" with name of databases) ...
8
votes
2answers
40k views

How can extract the table schema from just the .frm file?

I have extracted the data directory of mysql from a backup and need to get the schema from an old table, however it's a backup from a different machine. I have read a fair number of tutorials today ...
39
votes
1answer
72k views

SIMPLE or FULL recovery model for databases?

When should I use the full recovery model and when should I use the simple recovery model for databases? I always used the full recovery model because it is the default, but today i encountered this ...
10
votes
3answers
56k views

Restoring MySQL Tables from .ibd, .frm and mysqllogbin files

For some reason, when I try to open up my tables that are stored in .frm and .ibd files (whether on MySQL or phpmyadmin) it gives me a syntax error, or it says it does not exist. I've read the other ...
5
votes
3answers
26k views

ERROR Cannot find or open table?

MySQL version: 5.5.24 Due to the following problem: mysql> desc reportingdb.v3_zone_date_cpm7k; ERROR 1146 (42S02): Table 'reportingdb.v3_zone_date_cpm7k' doesn't exist /var/log/mysqld....
5
votes
1answer
17k views

The InnoDB log sequence number is in the future

Our site was getting intermittent database errors and I asked my webhost to check what's happening. After some inspection they found that the database has few issues and tried repairing it. Finally I ...
15
votes
3answers
27k views

Availability Group database stuck in Not Synchronizing / Recovery Pending mode

While upgrading the storage in a SQL Server 2014 SP1 (12.0.4422.0) instance we ran in to an issue where two of the databases would not start on the secondary after restarting SQL Server. The server ...
8
votes
1answer
13k views

How to output more than 4000 characters in sqlcmd

I've made a stored procedure restoredatabase that returns code to restore a database. The output script looks like this: restore database [DB] from disk='F:\FULL1.bak' with norecovery restore ...
11
votes
2answers
5k views

Contents of transaction log file in more detail

I have a question regarding transaction log (let’s just call it LDF for short) contents. I am assuming a database with full recovery model. I have read that LDF file contains (logs) each and every ...
0
votes
1answer
280 views

Oracle 11 rman db restore file corruption

First to mention that I came to the need of asking help after furious research I reattempts for about 3 weeks. I checked previous threads in Oracle community but nothing works for me. I am trying to ...
5
votes
2answers
5k views

Restore database to point in time from full backup only

I have a database with recovery mode set to FULL. It's a dev database and I have two full backups dated 19th and 27th i.e. latest. One of the developer did some changes on 26th and I want to rollback ...
5
votes
1answer
12k views

How to recover/restore corrupted Innodb data files?

A while ago, my Windows 7 system on which a MySQL Server 5.5.31 was running crashed and corrupted the InnoDB database. The weekly backup that's available does not cover all the tables that were ...
11
votes
2answers
6k views

Restore bak file to smaller mdf and ldf database files

I have a legacy database whose nightmarish lack of design I will not get into here, but the files on the server are (relatively) enormous. I have: MyDatabase.mdf: 24.8GB MyDatabase.ldf: 114.6GB This ...
2
votes
2answers
13k views

Unable to start Oracle database

We have an Oracle database, one data file (users tablespace) of the instance got corrupt and another data file (containing application data) was deleted due to some issue. The database is in ...
1
vote
2answers
2k views

MySQL Database and Table Loss

I have installed mysql and XAMPP on my system. I wanted to remove the mysql service of XAMPP. After removing it, I tried to install the new service for mysql using "MySQLInstanceConfig.exe". but now I ...
7
votes
2answers
1k views

Two Different Sources Taking Transaction Log Backups

I have inherited a database server with SQL Server 2005. The databases have full recovery mode with hourly transaction log backups. There are two sources taking full backups overnight and hourly ...
6
votes
1answer
5k views

Trying to solve “outside tablespace bounds” MySQL error, but recovering table with mysqldump fails

I am running MySQL on a Windows 2008 server. One of the tables (> 1 million records) seems to be corrupted. The mysql error log shows this: InnoDB: Error: trying to access page number 197105 in space ...
5
votes
2answers
16k views

Rollback Committed transaction in SQL Server

Is it possible to rollback a committed transaction? I have deleted all the data in a table. The delete statement is inside Begin Transaction and I have committed the transaction with a commit ...
21
votes
2answers
63k views

Rebuilding the transaction log

We have a very large database (~6TB), whose transaction log file was deleted (while SQL Server was shut down. We have tried: Detaching and reattaching the database; and Undeleting the transaction log ...
14
votes
5answers
18k views

Why is Mongo stuck in STARTUP2?

I have a Mongo replica set with a few secondaries. A box, which hosts a secondary instance, crashed and lost the database. I started the secondary Mongo instance again and now it's stuck in STARTUP2 ...
6
votes
3answers
28k views

How to repair, or drop/create a corrupted table in mysql?

Situation: I have a MySQL database with 104 tables, running locally on XAMPP on windows 7. All the tables have InnoDB engine. XAMPP MySQL is running as windows service. As front end I have PHP (...
4
votes
4answers
28k views

Recover from Postgres FATAL: could not open file pg_tblspc/

I have a pretty big PostgreSQL 9.1.3 running on Ubuntu 10.04. The data is spread over multiple tablespaces = physical drives. One of these drives is gone, so the directory of that tablespace doesn't ...
7
votes
1answer
6k views

Why does database recovery take so long?

On my SQL Server 2012 x64 Std instance I had a large transaction fail due to the transaction log filling up yesterday, it couldn't be rolled back and SQL Server has restarted the specific DB to ...
6
votes
2answers
6k views

Recover accidentally deleted rows from a table

My client has accidentally deleted all the records of a table from a test database. This test database is in SQL Server 2005 Express and we don't have a backup. Is it possible to restore the deleted ...
4
votes
1answer
1k views

Understanding Transaction Recovery

In the following reference, there is an algorithm outlining a transaction recovery algorithm using redo and undo. The algorithm is as follows: UNDO and REDO: lists of transactions UNDO = all ...
2
votes
1answer
3k views

How to get back the PostgreSQL database to a specific point in time?

I was running a batch script in a PostgreSQL database which inserted values in different tables between 10:40 and 11:00. Later I came to know that the script was executed mistakenly. How can I get ...
1
vote
2answers
1k views

Transaction recovery and rollback

As I understand: UNDO: Undoing a write item operation consists of examining its log entry [write_item, T, X, old_value, new_value] and setting the value of item X in the database to old_value. UNDO ...
9
votes
3answers
19k views

Transaction Log maintenance when switching to Simple Recovery

Background: I recently inherited 50+ SQL Servers with 450+ databases. The nightly backups are roughly 8TB and, needless to say, we're using more disk space than we'd like. All of the databases are ...
5
votes
1answer
1k views

Differential/T-Log LSN question

So, this is now my third question on this topic. I just keep finding more and more than i want to know and understand about how FULL recovery works. We transitioned a database to FULL yesterday by ...
4
votes
2answers
4k views

Recover deleted records [duplicate]

Possible Duplicate: How do I get back some deleted records? Our C#.NET application mistakenly deleted all records from all tables of its database. The application automatically takes backups, and ...
3
votes
1answer
2k views

mysql Wrong bytesec: 0-0-0 at linkstart: 0

I have several MySQL (MyISAM) tables that have been corrupted. Running CHECK TABLE mytable returns: > +-----------------+-------+----------+----------------------------------- | > clldata....
2
votes
1answer
4k views

Import .frm and .ibd files into a new instance of MySQL

I have the .frm and .ibd files from an old, non-working MySQL server (on Windows). I took out the hard drive and was able to get the data directory copied to my machine. How would I get them into ...
2
votes
1answer
3k views

MySQL: Recover Master from Slave after failover

I have replication running between two MySQL instances on two separate servers. Let's say M is the master and S is the slave. It's setup as one way replication M->S. I currently have S as read only ...
1
vote
2answers
53 views

Is it possible to restore a database with database backups starting on top of a restored server point in time snapshot that is out of date?

If I regularly backup my whole server where a SQL instance and database lives, and restore it to a different machine, can I use the database backups that have occurred (on the original server) after ...
1
vote
1answer
2k views

Recovering a dropped column?

I have a PostgreSQL table: CREATE TABLE essays ( id serial primary key, content text ); I inserted a few rows, then ran: ALTER TABLE essays DROP COLUMN content; How can I recover the data? ...
1
vote
3answers
25k views

Recover deleted table from the database

Currently I deleted one table from the database. But now I want some of the information from that table. Please suggest how to restore or get back the table. I am using SQL Server 2008 R2.
1
vote
1answer
326 views

Master updates Slave but not Master itself

I have a setup master/slave in which applications are pointed only to master. Yesterday Master had got crashed due to "multi bit error on dimm detected" in Front indication panel in orange color. ...
0
votes
0answers
708 views

How to do point in time recovery of binary log files into .sql file

I have written a shell script to do an incremental backup of MySQL database. For point in time recovery I'm using the binary logs generated in /var/lib/mysql directory. For point-in-time recovery, Im ...
0
votes
1answer
703 views

Recover a mongo database deleted by rm

My developer accidentally lost our database by a bash script, which turned out to run rm -rf /* (see this thread). Thanks to extundelete, he just recovered the /data/db/ folder: However, he could not ...