As a Cassandra developer, I’m better at answering the other side of the question: Cassandra scales better. Cassandra is known to scale to over 400 nodes in a cluster; when Facebook deployed Messaging on top of HBase they had to shard it across 100-node HBase sub-clusters. Cassandra supports hundreds, even thousands of ColumnFamilies. “HBase currently … Read more
To remove all rows from a CQL Table, you can use the TRUNCATE command: TRUNCATE keyspace_name.table_name; Or if you are already using the keyspace that contains your target table: TRUNCATE table_name; Important to note, but by default Cassandra creates a snapshot of the table just prior to TRUNCATE. Be sure to clean up old snapshots, … Read more
@Schildmeijer is largely right, however port 7001 is still used when using TLS Encrypted Internode communication So my complete list would be for current versions of Cassandra: 7199 – JMX (was 8080 pre Cassandra 0.8.xx) 7000 – Internode communication (not used if TLS enabled) 7001 – TLS Internode communication (used if TLS enabled) 9160 – … Read more
The main difference is that document stores (e.g. MongoDB and CouchDB) allow arbitrarily complex documents, i.e. subdocuments within subdocuments, lists with documents, etc. whereas column stores (e.g. Cassandra and HBase) only allow a fixed format, e.g. strict one-level or two-level dictionaries.
The main differences are the data model and the querying capabilities. Key-value stores The first type is very simple and probably doesn’t need any further explanation. Data model: more than key-value stores Although there is some debate on the correct name for databases such as Cassandra, I’d like to call them column-family stores. Although key-value … Read more
One of our applications uses data that is stored into both Cassandra and ElasticSearch. We use Cassandra to access those records whenever we can, and have data duplicated into query tables designed to adhere to specific application-side requests. For a more liberal search than our query tables can allow, ElasticSearch performs that functionality nicely. We … Read more
A key-value store provides the simplest possible data model and is exactly what the name suggests: it’s a storage system that stores values indexed by a key. You’re limited to query by key and the values are opaque, the store doesn’t know anything about them. This allows very fast read and write operations (a simple … Read more
I sometimes also get this error when starting my gulp server. My workaround is to just run: npm rebuild node-sass And then gulp starts nicely afterward.
There is nothing like a silver bullet, everything is built to solve specific problems and has its own pros and cons. It is up to you, what problem statement you have and what is the best fitting solution for that problem. I will try to answer your questions one by one in the same order … Read more