Questions tagged [snapshot]

The processes of creating a point in time copy of data.

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249 views

Transaction Replication Issue

I am trying to set up a Transaction Replication. I encountered error when i created a Publisher.While creating publisher i gave SQL Server agent accounts for Snapshot Agent and Log Reader Agent. When ...
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Script to find unused indexes over a period of time doesn't work in Oracle 11g

The statspack_unused_indexes.sql script described in this page would be incredibly useful to me, but it has been coded for an earlier version of Oracle. When I try to run it on 11g, I get the ...
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MongoDB fsyncUnlock won't unlock occasionally on Windows

We have a MongoDB replica set installed on Windows servers, with a scheduled backup job. MongoDB is configured to use journaling. The job runs db.fsyncLock() via script on MongoDB (primary server), ...
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Processing data while keeping frozen frontend database online

What is the best approach at having a "frontend" database online and working, while processing and generating new data in the back? I have an scenario that some tables and even whole databases data ...
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Replication Data Issue

After configuring replication all the data from tables has replicated from publisher to subscriber. Now my requirement is whenever I insert new record in publisher only that record should replicate ...
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Strategy for multiple distinct databases in PostgreSQL

I have a 30 gb db in PostgreSQL 9.2. Running On Amazon Linux on an ec2 (web virtual machine), with the data directory mounted from its own drive (EBS). I'll call the database db30. On production it'...
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478 views

Transactional Replication times-out with Database Snapshot on subscription

I have a VLDB that is being replicated using transnational replication. The performance has been terrible, and the process frequently times out. After much investigation, including Service Packs and ...
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1answer
1k views

Merge replication - can't create snapshot – timeout

I have a SQL Server 2008 database, and I need a merge replication because I want to sync with mobile devices afterwards. So I created a replication but when it comes to start the snapshot agent, the ...
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3answers
2k views

Backup standby database using LVM snapshot

Objective: Backup standby database (synchronous streaming replication) using LVM snapshot. When running pg_start_backup: postgres=# SELECT pg_start_backup('label'); ERROR: recovery is in progress ...
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1answer
757 views

READ_COMMITTED_SNAPSHOT support in SQL Server 2005 Express

I wonder if SSE 2005 supports the READ_COMMITTED_SNAPSHOT database option. What I found is this article: Features Supported by the Editions of SQL Server 2005. It states that SSE 2005 supports ...
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1answer
38 views

Are there open source RDBMS that support non-backup snapshots? [closed]

I'm not looking for point-in-time backups but some kind of "time machine" read-only functionality. For example when running a SELECT query I would like to tell the database to run it on the data as ...
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1answer
960 views

Restoring multiple snapshots with SQL Server 2008

I noticed I cannot have multiple snapshots of a SQL Server database and then restore from one of them (without I believe, deleting all but the one I want to restore). Is there a way to keep multiple ...
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1answer
986 views

ADDM report dba_hist_snapshot

How does ADDM report work? When I take two snapshots one for START: 05-OCT-2011 09:00:00, END : 05-OCT-2011 10:00:00 and another one for START: 06-OCT-2011 09:00:00, END : 06-OCT-2011 10:00:...
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1answer
25 views

Are snapshots generated for each sub query inside a Postgres READ_COMMITTED transaction?

From what I understand - in a READ_COMMITTED Postgres transaction “the transaction obtains a snapshot whenever an SQL command is executed” source. Does this mean a snapshot will be obtained for each ...
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2answers
66 views

Creating a database snapshot for every previous month

I am new to SQL Server, I got a task to create a snapshot of existing database for every previous month until current month and do a snapshot once a month from now on. I created a job to make ...
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1answer
737 views

Is it possible to support multiple snapshots / store a snapshot / restore from a snapshot to a state with another snapshot?

So, I would like to have a snapshot structure like the following: A snapshot 1 is taken. Some code is run, then a snapshot 2 is taken. Then some more code is run, and the database is reverted to ...
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231 views

Unpredictable performance of queries against snapshot

I've got a basic reporting solution working where we have a collection of views that get exported to CSV files on a daily basis. For numerous reasons, we don't run the reports against the ...
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1answer
1k views

Global Read Lock for Snapshot of MySQL Data

I have a database that is entirely comprised of MyISAM tables(yes, I did not create it). I need to create a slave and start replication so we could point read-only queries there. Here is my idea: ...
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2answers
951 views

Is possible do an online snapshot backup , without archive logs at Oracle Database?

Using Oracle Database Standard Edition 11r2 . I'm looking a way to backup the database with zero downtime , using a snapshot of datafiles (LVM snapshots) and without need backup de archive logs. ...
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168 views

EC2 and setting up MYSQL Replication

my database size is very big around 100gb and when I restore it takes 3 days to restore. I am using amazon ec2. My question is I want to setup a new slave to MYSQL master, can I take a snapshot of ...
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1answer
188 views

DB2 Transaction Logs - can they be COPY-PASTE on another Disaster Recovery Server?

We have Server1 with Online Backup1, Archive Logs 1,2,3 for example and Transaction Logs from 1 to 10. We are interested in next scenario: If Server1 fails completely and we want to move everything ...
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1answer
39 views

Is it possible to restore a database snapshot from a 64 bit system to a 32 bit one?

I would like to perform a restoration test on a snapshot backup of my MariaDB database using a test server running on a 32-bit OS. My production server is a 64-bit system. I would like to know if the ...
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1answer
165 views

quick checkpoints for development mode

i'm a programmer, not a dba. i need a mechanism to quickly make a snapshot of a database (oracle 11g XE) before i run migration. migration changes data, grants, DDL (tables, triggers, lexers, views ...
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1k views

Taking hot backup of slave node in postgres (master-slave config with repmgr)

I have a postgresql setup with master-slave configuration using repmgr. I'm struggling with taking a consistent snapshot backup (pg_start_backup) of the slave node, this is due the fact that the slave ...
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1answer
771 views

Drop & re-add subscribers to transactional replication

I'm trying to get stored procedures to execute on the subscribers, as seems to be best practice. I already have transactional replication running happily. I add a new stored procedure, and set ...
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1answer
480 views

Should I keep pg_xlog on the same disk as data if using disk snapshotting?

We're running on EBS volumes on EC2. We're interested in leveraging EBS snapshotting for backups. However, does this mean we'd need to ensure our pg_xlog is on the same EBS volume as our data? (I ...
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13 views

Restore mongodb database from blockstore snapshot backup

I have a situation where I need to restore the mongodb database from the blockstore snapshot backup taken from the ops manager which is used to manage 3 node replica set. I need to restore this backup ...
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1answer
47 views

What kind of changes does snapshot file store?

Assume that I created a database called [DBS] and inside that database I created a table called [products]. Then I inserted 4 rows into [products]. Afterwards I took a snapshot of [DBS]. As a result,...
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1answer
266 views

how to change the publication settings via T-SQL?

I set up a new server to host some database publications. On the same server I set the distributor db. All goes on well, then while running a snapshot of a publication on transactional replication: ...
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25 views

Snapshot replication from SQL Server 2012 to SQL Server 2008R2

We are using snapshot replication as a standby to replicate prod data for a month from 2012 to 2008R2 after migration from 8R2 to 2012, just as a rollback process. Using snapshot replication for 10 ...
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1answer
472 views

Best way to create a daily snapshotted read-only db in RDS?

We have a PostgreSQL db instance in RDS. In our application we need to run a daily export in the early hours of every day, the export and transformation may take some time and one issue we've found is ...
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1answer
28 views

Help with updating and archiving data

I'm building a MySQL database and a frontend. One function of the database application is to make an invoice. I'm looking for a way to archive all of the data that went onto the invoice so that if ...
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1answer
236 views

Can't bring up slave from ec2-consistent-snapshot due to uncommitted prepared transaction

I'm struggling with bringing up a slave instance using a snapshot created by ec2-consistent-snapshot, in my log it's describing the fact that an unprocessed transaction exists, but isn't that what ec2-...
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bcp copy from snapshot failed due to snap being in transition

We have a SQL job that runs each night to perform a data extract and import function. The job performs against a snapshot and copies from several tables in a serial loop. Today the job reported the ...
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1answer
149 views

Group Policy - replication snapshot

Has anyone seen a domain Group Policy stop a transactional replication snapshot from being configured and executed "A required privilege is not held by the client". To cut a long story short... I am ...
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699 views

Transactional Replication Snapshots causing serious locking after 2012 upgrade

I am experiencing serious locking when adding new articles to an existing transactional replication publication, which is hanging the website. This is the first time I have attempted this since I ...
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1answer
406 views

snapshot too old : roll back segment number with name too small error doubt

recently, i have been facing snapshot too old error. So, i tried to understand the why this is happening. Link to the snapshot too old article Still, i have some doubts regarding the error. If i ...

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