Cassandra supports various strategies to partition data across nodes in a cluster. User can choose available strategies as required by an a...| distributeddatastore.blogspot.com
In a distributed system like Cassandra, data replication enables high availability and durability. Cassandra replicates rows in a column family on to multiple endpoints based on the replication strategy associated to its keyspace. The endpoints which store a row are called replicas or natural endpoints for that row. Number of replicas and their location are determined by replication factor and replication strategy. Replication strategy controls how the replicas are chosen and replication fact...| Key Concepts
SSTable is an abbreviation for Sorted String Table. It is the fundamental storage building block in few of the modern Log Structured Merge Tree(LSM) based distributed database systems and key-value stores. It is used in Cassandra, BigTable and other systems. SSTable stands for Sorted Strings Table which stores a set of immutable row fragments or partitions in sorted order | Key Concepts
Cassandra's AntiEntropy service uses Merkle trees to detect the inconsistencies in data between replicas. Merkle tree is a hash tree where leaves contain hashes of individual data blocks and parent nodes contain hashes of their respective children. It provides an efficient way to find differences in data blocks stored on replicas and reduces the amount of data transferred to compare the data blocks. | Key Concepts
After the fall of Troy, Cassandra was taken as Agamemnon's "pallake" (concubine) and taken to Mycenae, where she was killed by Clytemnestra, Agamemnon's wife. The destiny of prophetesses is never so bright, especially when they turn out to have been right. Something similar, although fortunately much less tragic, happened to my Cassandra blog, censored on Facebook by the powers that be. So, it is time to call it quits. But Cassandra is not dead! She reincarnated in the form of the Roman philo...| Cassandra's Legacy
And now, no more shall my prophecy peer forth from behind a veillike a new-wedded brideBut it will rush upon me clear as a fresh wind | Cassandra's Legacy
Professor Sabine Hossenfelder engages in a performance about Cassandra. Nice song, well sung, and it catches something of Cassandra's story and character. Although I am reasonably sure that Cassandra would not wear that kind of clothes. | Cassandra's Legacy
Summer walks have me thinking about worm sex. I witnessed it in Brooklyn, but never in Wisconsin, where I now reside. Enjoy this post from 2012. It’s timeless because, well, worm sex is timeless. | The Last Word On Nothing
In 2018, I wrote the post below about bedtime procrastination. The term was new to me, the concept was not. I was a bedtime procrastinator. And, spoiler alert, I still am a bedtime procrastinator. Zero improvement. | The Last Word On Nothing
Netflix has released over 100 new Original series so far in 2025 - these are our picks of the best of the best.| What's on Netflix
From fantastic sci-fi to teary goodbyes to feel-good dramas, there's something for everyone this month.| What's on Netflix
An Excerpt From Bluetiger’s Aenar’s Aeneid, Part II – “Of Arms and the Man I Sing”, Published in Polish at FSGK on June 29, 2019 Translated and Published Here As: The Name “Valyria” From Chapter III: “Targaryens were rightly regarded as being closer to gods than the common run of men” Aeneas’ wife Creusa was Cassandra’s sister, … Continue reading The Name “Valyria”| The Tolkienic Song of Ice and Fire
In the previous post I showed how to use asynchronous Rust to measure throughput and response times of a Cassandra cluster. That approach works pretty well o...| pkolaczk.github.io
Performance of a database system depends on many factors: hardware, configuration, database schema, amount of data, workload type, network latency, and many ...| pkolaczk.github.io