HBase-Backup | Utility to backup and restore HBase tables | Continuous Backup library
kandi X-RAY | HBase-Backup Summary
kandi X-RAY | HBase-Backup Summary
This backup utility is based around HBASE-4618. We took the features we liked from the documents and implemented some generic tools that would work for us. This package comes equipped with three utilities: a backup tool to get snapshots of HFiles, an import/restore tool, and a tool to frequently copy HLogs. There is a fourth tool we use, but did not develop it ourselves so we have not included it in the our package. It's WALPlayer, and it is described in HBASE-5604. WALPlayer is in the 0.94.0RC version of HBase so we back ported the code to work with HBase 0.92.1, the current version we are using. It is important to point out that these tools, like any other HBase backup options at the moment, are relatively new. We are continually testing them and looking for any issues. We encourage people looking for backup solutions to try it out and send any feedback. To get more details about these tools, please take a look at the wiki page.
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Top functions reviewed by kandi - BETA
- Main entry point
- Performs a major copy of the given HBase HBase
- Method to verify the tables
- Returns the command line options supported
- Initialize the cluster
- Checks if the given table is valid for the given table
- Get a list of all tables available in this backup directory
- Returns the tableinfo path
- Flush a region
- Returns the original path of the given file
- Copy a file from source path to destination cluster
- Get a list of files for the given region
- Get list of files to copy
- Setup mapper
- Overrides the list of FileStatus objects
- Initialize the reader
- Read key value
- Get the oldest file start time
- Cleanup file
- Get the root table object
- Get HRegionInfo object from byte array
HBase-Backup Key Features
HBase-Backup Examples and Code Snippets
Community Discussions
Trending Discussions on Continuous Backup
QUESTION
ANSWER
Answered 2022-Feb-22 at 10:59I am not sure if you have seen this message in the portal when you created the account/also mentioned in the doc
"You will not be able to switch between the backup policies after the account has been created"
since you need to select either "Periodic" or "Continuous" at the creation of Cosmos Account, it becomes mandatory.
Update:
You will not see the above in portal anymore, you can Switch from "Periodic" to "Continous" on an existing account and that cannot be reverted. You can read more here.
QUESTION
What would be the consistency of the continuous backup of the write region if the database is using bounded staleness consistency? Will it be equivalent to strong consistent data assuming no failovers happened?
Thanks Guru
...ANSWER
Answered 2021-Nov-25 at 17:15Backups made from any secondary region will have data consistency defined by the guarantees provided by the consistency level chosen. In the case of strong consistency, all secondary region backups will have completely consistent data.
Bounded staleness will have data that may have stale or inconsistent data inside the defined staleness window (minimum 300 seconds or 100k writes). Outside of that staleness window the data will be consistent.
Data for the weaker consistency levels will have no guarantees for consistency from backups in secondary regions.
QUESTION
MongoDB has deprecated the continuous back up of data. It has recommended using CPS (Cloud provider snapshots). As far as I understood, snapshots isn't really going to be effective compared to continuous backup coz, if system breaks, then we can only be able to restore the data till the previous snapshot which isn't gonna make the database up-to-date or close to it atleast.
Am I missing something here in my understanding?
...ANSWER
Answered 2020-May-19 at 10:12Cloud provider snapshots can be combined with point in time restore to give the recovery point objective you require. With oplog based restores you can get granularity of one second.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install HBase-Backup
You can use HBase-Backup like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the HBase-Backup component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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