Database Repair Options in Cassandra

0 votes
What are the different approaches to Repair a NoSQL Database like Cassandra?
Need Help
Jun 28, 2018 in Database by shams
• 3,670 points
2,073 views

1 answer to this question.

0 votes
  • Anti Entropy: Anti-entropy Repair is a process of comparing the data of all replicas and updating them with the newest version of data using Merkle Tree. Anti-entropy repair is triggered manually. It has two phases to the process:
    • Building a Merkle tree for each replica
    • Comparing the Merkle trees to discover differences

        Anti-entropy repair is very useful and is often recommended to run periodically to keep data in sync.

  • Read Repair: Read Repair is the process of fixing inconsistencies among the replica nodes at the time of read request. In a read operation, if some nodes respond with data that is inconsistent with the response of newer nodes, a Read Repair is performed on the old nodes. It ensures consistency throughout the node ring. Done by pulling all of the data from the node and performing a merge, and then writing it back to the nodes that were out of sync.
  • Nodetool Repair: Nodetool repair command against a node, initiates repair for some range of tokens. The range being repaired depends on what options are specified. The default options, just calling “nodetool repair”, initiate a repair of every token range owned by the node
  • Full Repair:  Full Repairs operate over all of the data in the token range
  • Incremental Repair: Incremental Repair only repairs the data that’s been written since the previous incremental repair. Incremental repairs are the default repair type, and if run regularly, can significantly reduce the time and I/O cost of performing a repair. It splits the data into repaired and unrepaired SSTables, and only repairs unrepaired data.Once an incremental repair marks data as repaired, it won’t try to repair it again. Incremental Repair is not recommended instead Full Repair should be performed.

Hope this helps!!

Join our Cassandra course online to learn more.

Thanks.

answered Jun 28, 2018 by kurt_cobain
• 9,390 points

Related Questions In Database

0 votes
2 answers

Types of relationships in Database

There are 3 types of relationships in ...READ MORE

answered Aug 17, 2018 in Database by zombie
• 3,790 points
2,752 views
0 votes
1 answer

Indexes in Database

The index is a data structure that ...READ MORE

answered Aug 20, 2018 in Database by DataKing99
• 8,250 points
911 views
0 votes
1 answer

Atomicity and Aggregation in Database

Atomicity is the condition where either all the ...READ MORE

answered Aug 22, 2018 in Database by DataKing99
• 8,250 points
2,954 views
0 votes
1 answer

Fragmentation in Database

Fragmentation is a feature which controls the ...READ MORE

answered Sep 4, 2018 in Database by Sahiti
• 6,370 points
533 views
0 votes
1 answer

Different partitoners in Cassandra

Murmur3Partitioner is the default partitioner. It is ...READ MORE

answered Jun 27, 2018 in Big Data Hadoop by kurt_cobain
• 9,390 points
627 views
0 votes
1 answer

Logging Levels in Cassandra

ALL: All levels including custom levels TRACE: Designates finer-grained informational ...READ MORE

answered Jun 28, 2018 in Database by shams
• 3,670 points
658 views
0 votes
2 answers

Durable Writes in Cassandra

When Cassandra write: 1. memtable (in memory) 2. commit ...READ MORE

answered Nov 25, 2018 in Database by Amit
• 180 points
7,311 views
0 votes
1 answer

Secondary index in Cassandra

Secondary indexes are indexes built over column ...READ MORE

answered Aug 21, 2018 in Database by kurt_cobain
• 9,390 points
884 views
0 votes
1 answer

Tunable Consistencies in Cassandra

Tunable Consistency is a phenomenal characteristic that ...READ MORE

answered Aug 21, 2018 in Database by kurt_cobain
• 9,390 points
992 views
0 votes
1 answer

Management Tools in Cassandra

DataStaxOpsCenter: internet-based management and monitoring solution for ...READ MORE

answered Aug 21, 2018 in Database by kurt_cobain
• 9,390 points
1,023 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP