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Questions tagged [scylladb]

A Cassandra-compatible NoSQL data store.

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After nodetool refresh number of records in the source is much larger than in the target instance

Restore snapshots to another cluster (migration) source: Scylla v. 4.4.1 on Kubernetes, 4 nodes e.g. a1,a2,a3,a4 target: Scylla v. 5.4.6 - no Kubernetes installation 4 nodes e.g. b1,b2,b3,b4 Steps: ...
ania wieczorek's user avatar
1 vote
1 answer
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Is there a full copy of data on each node if RF=3 and DC has 3 nodes?

When backing up a Scylla cluster (or cassandra for that matter) I understand that its best practice to take a snapshot of every node. However if I have a 6 node distributed cluster spanning 2 ...
imbrian21's user avatar
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1 answer
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Is a multi-table batch within the same node atomic and isolated?

Im trying to understand this. cassandra batches are atomic always, and if the batch only modifies a single partition of a single table, then that batch is also isolated. but what about multi table ...
InglouriousBastard's user avatar
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Need help decoding compressed SSTable

It's certainly a dumb idea but I convinced myself to write a sstable decoder in Golang. I've read the spec here. Currently I can decode the Compression file. According to this file it's pretty clear ...
Raphaël MAZELIER's user avatar
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0 answers
7 views

How to restore a backup and incremental backup of scyllaDB

I am working on incremental backup and restore. When I am trying to restore the incremental backup, after restoration, I am getting an error on cqlsh shell. ReadFailure: Error from server: code=1300 [...
MANJESH H S's user avatar
0 votes
1 answer
88 views

How can I make (game_id, user_id) unique, yet (game_id, score) indexed/clustered, in ScyllaDB?

See this in ScyllaDB: CREATE TABLE scores_leaderboards ( game_id int, score int, user_id bigint, PRIMARY KEY (game_id, score, user_id) ) WITH CLUSTERING ORDER BY (score DESC); The ...
Nuno's user avatar
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1 vote
1 answer
272 views

How do I manage Cassandra/Scylla snapshots?

I am new to Scylla, and I'm looking to setup a proper Backup & Restore solution. I've just tested running nodetool snapshot -t my_backup, and see that what it does is create a snapshot folder ...
Nuno's user avatar
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2 votes
2 answers
480 views

Can you restore a ScyllaDB from only a backup of /var/lib/scylla/data folder?

I had a single node scyllaDB which was lost, but only a backup of the /var/lib/scylla/data folder was done. My question is, can a single node scylla be restored from only this backup? I already ...
perrohunter's user avatar
3 votes
2 answers
348 views

Implementating user notifications list using Aerospike

I need to choose the right DB for a notifications system that needs to handle billions of notifications. The record structure is as follows: [user_id, item_type, item_id, created_at, other_data] The ...
Kaplan Ilya's user avatar
3 votes
2 answers
312 views

Allocate space in Cassandra

We run a Cassandra cluster with 2 DC, 3 nodes each (2 RF). The state of the cluster is quite bad (never repaired) and the disks were getting full so we added additional nodes which after the bootstrap ...
Jibrilat's user avatar
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2 votes
2 answers
2k views

Correct way to perform backup of Cassandra/Scylladb

What's the correct(advisable) method to backup a cassandra or scylladb so that we can restore it on development environment with ease?
Kokizzu's user avatar
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