VoltDB

Kyle Kingsbury looks at VoltDB:

Unlike most SQL databases, which default to weaker isolation levels for performance reasons, VoltDB chooses to provide strong serializable isolation by default: the combination of serializability’s multi-object atomicity, and linearizability’s real-time constraints.

Serializability is the strongest of the four ANSI SQL isolation levels: transactions must appear to execute in some order, one at a time. It prohibits a number of consistency anomalies, including lost updates, dirty reads, fuzzy reads, and phantoms.

If you use VoltDB, it sounds like upgrading to 6.4 is a good idea.

Related Posts

Thoughts On Exactly-Once Processing And First-In First-Out

Kevin Sookocheff looks into Amazon’s Simple Queue Service and explains some concepts of distributed messaging systems in the process: In an ideal scenario, the five minute window would be a complete non-issue. Unfortunately, if you are relying on SQS’s exactly-once guarantee for critical use cases you will need to account for the possibility of this […]

Read More

Isolation Level Basics

Randolph West describes the primary isolation levels in SQL Server: There are four isolation levels in SQL Server (as quoted from SQL Server Books Online): Read uncommitted (the lowest level where transactions are isolated only enough to ensure that physically corrupt data is not read) Read committed (Database Engine default level) Repeatable read Serializable (the highest level, where transactions […]

Read More

Categories

July 2016
MTWTFSS
« Jun Aug »
 123
45678910
11121314151617
18192021222324
25262728293031