Viewing profile — aweisberg

I have the same grandfathered plan. I wish I had bought more storage when it was available. It looks like we aren't getting any upgrades not that I blame them.

I would be really surprised to find that a tree is faster then a fast cryptographic hash function like SIP hash. Cache misses to main memory are worth 10s of instructions and that …

This is actually an important topic for me. I am implementing a sharding distribution based on consistent hashing using MurmurHash3 as hash function. I am taking the first 4-bytes …

A secret seed is not sufficient to prevent DoS vulnerabilities. That is one of the things the creators of SIP hash demonstrated. You can create collisions with MurmurHash3 that wor…

For the last 18 years or so I have been taking some form of low cost Ritalin with a co-pay between 15-25 dollars. This ancient medication that is a generic costs 130 dollars a mont…

Is comparing a hex-core to a quad-core apples to apples? Haswell per core performance is still better although it will be a long time before we see a hex-core part.

The intent of the test was to measure throughput. Since the API is asynchronous that means the client was submitting as much work as would fit in the queues at both client and serv…

Neoview and Teradata are OLAP databases. OLTP is a different problem.

NoSQL doesn't mean NoDurability. Many of them offer better multi-datacenter durability and availability by dropping ACID for BASE. I suspect that most data by volume belongs in a B…

kbd+ is a column store (analytic database) and does not partition horizontally. The two things they have in common is that they are both in memory (and kdb+ not necessarily) and su…

Redis does not support partitioning so it is even more apples to oranges then VoltDB vs. Cassandra. Both VoltDB and Cassandra rely on adding nodes to scale.

VoltDB replicates synchronously.

MongoDB partitioning support is still under development. Probably more apple to oranges then VoltDB vs. Cassandra.

http://wiki.apache.org/cassandra/Durability "Cassandra's example configuration shows CommitLogSync set to periodic, meaning that we sync the commitlog every CommitLogSyncPeriodInMS…

"Cassandra writes to disk. VoltDB is an in-memory database. So I gave both systems plenty of RAM to hold the data set and turned Cassandra's consistency settings pretty low." So in…