Questions tagged [recovery]

Reconstructing a database.

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109 views

Fast recovery vs Accelerated database recovery in SQL server 2019

while comparing the features available in different SQL server editions, i see that Fast recovery and Accelerated Database recovery are 2 separate features. I am unable to find any documentation ...
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galera_new_cluster hangs with galera_recovery

My cluster crashed and i cannot restart the first node with galera_new_cluster. The nodes are distributed geographically in France with medium latency of 12ms. It remains on /usr/bin/galera_recovery ...
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SQL Server - Restore only primary Filegroup but bring the database online

I'm trying to find out if it's possible to bring a SQL Server 2016 Enterprise database online by restoring only the primary Filegroup. My scenario is, we have a fairly large OLTP database, of around ...
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Which folder I use for recovery mysql database

Accidently deleted mysql database and reload again.But ı cant find my old database and no have backup.This is picture that mysql ProgramData folder. Which folder should ı use for recovery? Thanks ...
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How to repair a block based Rocksdb sst file with corrupt masked crc32 checksum in that case? [closed]

Environment I'm using the Ethereum cryptocurrency in a way which requires something called full Ethererum archival node where each new blocks (somewhat a batch of recent transactions) is added to the ...
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1answer
31 views

Recover dropped mysql sys schema

I dropped the sys schema while tinkering around mysql 8(current version). Is there a way to recover it. I am using ubuntu 20.04. I tried using the mysql documentation but I couldn't find anything ...
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1answer
22 views

How to set up mysql docker container with existing ib* files?

Related to a previous issue, I'm trying to recover some data from existing ib* files from a crashed server. The database version is 5.1.69, so quite old. One of the responses was to install MySQL 5.5, ...
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1answer
35 views

How to use wal_level in Postgres to set the recovery mode to simple for a database like how Microsoft SQL Server does it?

In Microsoft SQL Server, ALTER DATABASE CURRENT SET RECOVERY SIMPLE WITH NO_WAIT; will set the recovery mode for a database to simple, so the transaction log file space can be re-used. In Postgres, ...
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3answers
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when we restore and when we recover a database?

Restoring involves copying backup files from a secondary storage (backup media) to disk. This can be done to replace damaged files or to copy/move a database to a new location. Recovery is the process ...
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How to properly cut/filter binlog file to perform single table PIT?

I've been trying to perform a single table PIT. After cutting off a dump the portion related to the table I want to restore in time, I've been trying to do a similar operation with the binlog file ...
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1answer
222 views

How crash recovery process works in SQL Server?

I would like to ask a question regarding recovery process while restoring database operation. Let's say I restored a full backup with NORECOVERY followed by restoring two t-log backups with NORECOVERY....
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How to perform partial PIT Recovery without using a staging database in MySQL? [duplicate]

I have a full physical backup and binlogs available for my MySQL instance. Is there a way to perform a partial point in time recovery (meaning restoring in time a subpart of the whole database, i.e. ...
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Point-In-Time Recovery of a single table having full physical backup in MySQL?

I need to do a point-in-time recovery, having a full physical backup and the bin-logs available. One way is for sure by mean of an external instance where one can restore the full database and then ...
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Mysql trying to drop table and how to recover data?

I have on lamp setup where suddenly I see all the database files are missing and gone and when I checked the error logs I can see few of this lines. InnoDB: Error: table `com`.`#sql` does not exist in ...
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1answer
53 views

RMAN Restore control file and SP File

I need to perform an incomplete recovery. We keep 7 days of backups, and I want to restore the database as it was 7 days ago. I've not done this before. My question is: I can use the SET UNTIL TIME ...
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How to restore a MySQL InnoDB with ONLY .ibd files?

I had a Bitnami Joomla! stack running on a computer that suddenly kicked the bucket. I had neglected to make a back-up before this happened so I do not have any dumps or backed up files, but was able ...
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1answer
78 views

Databases missing after exporting server and rebuilding master DB

We had a server running Microsoft SQL Server 2014 databases on Hyper-V. I exported it (with C: and D: drives) and opened on other machine. I could not start the MSSQLSERVER service because it said the ...
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1answer
48 views

Cannot restore data using Postgres WAL files

I'm a newbie at PostgreSQL. I'm trying to setup a streaming replication (postgresql 9.1). And I want to test backup & restore on local. I also made backup files successfully (I think so) by using ...
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1answer
24 views

Latest version to support MySQL 5.1.69 ib* files

Would like to recover InnoDB data from a crashed server. The last backup indicated it was running MySQL server 5.1.69. When doing a recovery, the log files show that the current MySQL won't support ib*...
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1answer
384 views

Corruption of files in postgres: The database subdirectory “base/13067” is missing

Right, my PostgreSQL database 11.1 is on top of a GlusterFS. My GlusterFS break, my backup was being done on another table and I don't have backups anymore. I started the database on a docker ...
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131 views

SQL Server 2019 Database stuck In Recovery state after restart [duplicate]

SQL Server was restarted by mistake, when it came online, database came back in "In Recovery" mode. Check from error it says "Recovery of database 'DB1' (5) is 8% complete (...
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mongo replica is down

I have A mongo replica with 6 nodes, not sure why but 4 of them went down and two entered to recovery state. each time I tried to start the service of one of the down nodes it fails with error there ...
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1answer
146 views

What is difference between starting Instance with -T3608 and with -f?

I simulated a corruption of model database on test environment just for learning purposes. While reading others blogs and articles about it I stuck on the question, what is difference between starting ...
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1answer
87 views

SQL Server database tries to restore itself automatically (and gets stuck)

I currently run into an issue, that a SQL Server Database has the state 'recovery pending' every morning. No one has started a database recovery, the server itself decides to do it. The recovery ...
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1answer
71 views

Oracle 12c recovery without system file

Scenario: Deleted system files (dbf files); and trying to recover database back to normal using available control files, and some redo logs. Backup is not available, nor are archived redo log files ...
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1answer
28 views

Does SQL Server perform instance recovery after clean shutdown compared to Oracle Database?

If Oracle detects that an instance recovery is needed (like issuing shutdown abort command or crash happens), it will initialize recovery process. What about SQL Server? Does it behave in the same way?...
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PITR Restore on Postgresql Windows

I have Postgresql 11 running on Windows server and master/slave replication working perfectly. I have enable the wal_archiving and also i have enabled automatic backups using pg_dump I need to ask if ...
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103 views

Database in suspect mode

I'm experiencing a tough issue for me. When I was updating some columns into the database I have previously installed, the main memory corruption led the database jump into the suspect mode. I follow ...
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Point-In-time-recovery in Greenplum Database

We have recently setup greenplum. Now the major concern is to setup strategy for PITR. Postgres provides PITR capability but I am a little confused as how will it work in greenplum as each segment ...
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22 views

High RAM usage during Postgres PITR

We're currently running Postgres 10 in our infrastructure with Barman managing weekly full backups and holding onto the WALs. Because of the size of our DB, the WAL volume, and resource constraints ...
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1answer
146 views

Postgres Server staying in read only mode after a barman recover command is executed

All, I am trying to perform a PITR restore using barman using recover command. The problem is that the server remains in the read-only state once the barman recover is done. Is there a way by which ...
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Database cannot be opened. It is in the middle of a restore

I have executed these two commands: USE master GO RESTORE DATABASE test FROM Kingston WITH NORECOVERY GO USE master GO RESTORE LOG test FROM Kingston WITH STOPAT = '2020-05-13 14:05:25', RECOVERY; ...
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Why recovery took longer time even though analysis phase is not that long

We are doing Volume Snapshot restoration from Production to Warm Stand-By Server on daily basis. Daily it takes around 10 mins for DB to recover. But yesterday it took 44 mins to recover. I am ...
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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 ...
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617 views

Why can mysqlfrm not read from my .frm file? See debug output

I'm working on a project at home and learning databases as I go. Because of my inexperience I've just learned the hard way that cut/pasting .ibd files is an extremely bad idea. The tables have ...
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2answers
62 views

Associate BAK file with SQL Server database

One of our users deleted a lot of data from one of our database applications, and I need to find a way to restore it. I have a bak file and full recovery mode, but there is a catch. This bak file is ...
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1answer
88 views

Is accelerated database recovery available in SQL Server 2019?

SQL Server 2019 CTP introduced a new feature – accelerated database recovery. But then something strange started to happen: If we look at doc page about this feature, we would see no mention of SQL ...
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2answers
68 views

Why does SQL Server start REDO phase from minLSN instead of last CHECKPOINT?

while reading an article from BOL, I stuck on the picture which explains the recovery process of database (without ADR): Shouldn't Phase 2:Redo start from Last CHECKPOINT as till that point ...
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1answer
29 views

Recover raw Databases from corrupted MySQL 8 + Windows Server Implementation

I have a (Virtualized/Hyper-V) MySQL 8 (8.0.16.0) DB server whose installation has become corrupt and will no longer start the service, or report any errors as to why it won't start (this is a virtual ...
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214 views

Import Sybase SQL Anywhere 8 DB into SQL Server without access to Sybase

This is my first post here and its a doosy. I am facing what seems to be a unique situation at the moment. I am in the process of moving my client to a new environment which includes decommissioning ...
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3answers
121 views

Why does InnoDB corrupt tables upon recovery?

When setting innodb_fast_shutdown=0 MySQL drops all incomplete transactions before shutting down/crash. The default value is 1, which is understandable to preserve incomplete transactions. However, ...
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534 views

How to restart MS SQL server right, what is best practice to do that?

I`m quite new to DB administration. I have a problem when I restart SQL server, one of the databases goes into Recovery mode and automatically repairs the DB in 30 min. I don't know why this happens....
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104 views

Attempting to Restore Database From ibd Files but Receiving Errors on Tablespace Import

Recently, a customer (who didn't take backups of their system for whatever reason) had a database disaster so their production database had all of its files removed EXCEPT its ibd files. I have ...
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5answers
588 views

Is there a way to reduce the amount of time spent on a point in time recovery?

I'm pretty sure I know the answer to this, but the limitations of a point in time recovery blows my mind. Say I have a 2TB database set to FULL recovery mode. I diligently take weekly full backups, ...
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1answer
133 views

How to resynchronize replica in Postgresql

I have a server with Centos6 and Postgresql 9.2, I have set up a replica in postgresql to another server of the same characteristics, today in the morning I have an error in the archiver process on ...
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314 views

SQLite: Extract data from the `-wal` file

Yesterday I accidentally deleted an SMS banking notification thread on my Android device. A classic case: I didn't backup the messages for very long time. After flashing the recovery and rooting the ...
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1answer
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Deleted oradata folder under oracle home by accident

While setting up a new server, I accidentally deleted the oradata folder in the working Database server. I have no backup of the working database, I googled and found flashback option to recover, but ...
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1answer
287 views

Oracle Can a Dropped View Be Recovered?

I dropped a view 20 minutes ago. Can I recover it? If yes, how?
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1answer
94 views

Restore from .db folder for Analysis Services

There is an objective to recover cube from long time ago retired MSAS instance. Issue I'm currently standing with is that actual .abf backups are now in a cold storage and recovering them would take a ...
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1answer
122 views

Decrypt T-SQL log backup header and read LSN

For some reason I need to read the LSN from the T-SQL logs backups without restoring them or even their headers (I assume even restoring only their headers will change the LSN on the database side too,...

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