How to migrate Datastax Cassandra to Open Source Apache Cassandra?
We need to add open source Apache node to dse cluster first. After the data sync is done, we can…
How to create user/permission with examples in Cassandra?
CREATE USER in Cassandra CREATE USER alice WITH PASSWORD ‘password_a’ SUPERUSER; CREATE USER bob WITH PASSWORD ‘password_b’ NOSUPERUSER; CREATE USER…
Fixing “No space left on device” When There Is Still Free Space
“No space left on device” (ENOSPC) usually means exactly what it says—the disk is full. But every so often you…
Rsync vs Scp – Which is Faster?
Rsync is a unique, full-featured file transfer facility. It can perform differential uploads and downloads (synchronization) of files across the…
14 Apache Cassandra best Practices for developers & Application Teams
No Load balancers in front of cassandra Cassandra distributes the data across the nodes and most of the cassandra drivers…
27 Cassandra Best Practices for Administrators / DBA team
Decrease the default read ahead values in unix/linux systems Most of the modern unix/linux systems use read ahead so that…
Cassandra error Unit cassandra.service entered failed state
We get this error when we start our Cassandra recently. New main PID x does not belong to service, and…
How to fix “WARNING: Your password has expired.” in Linux?
Sometimes when we ssh to Linux box, we get this error “WARNING: Your password has expired.” You must change your…
How does data distribution work in Cassandra?
Cassandra uses data partitions to distribute data to each node. Partitions are based on the partition keys. Partition function(partition key)…
How to backup Cassandra database ? 14348 Ratings
Apache Cassandra supports two kinds of backup strategies. A snapshot is a copy of a table’s SSTable files at a…