What to look for when choosing a power server

It is not easy choosing a power server, we can’t ignore the truth that the power supply unit is about the most significant component in server computers. Almost every other component relies on the efficiency of the power server. Learning some valuable information will go a long way in helping you choose he right power server for your computer system.

You need to have in mind that a power server is a very complex connected device, you might not necessarily understand but they must locate the right amount of direct current among the entire server component. For server elements to work at full capacity, this unit must provide enough power, especially the motherboard and processor. To help give you a better idea of what to look for, here are things you need to look out for when choosing a good power server.

Server Power Supply Efficiency

The PSU efficiency explains the major difference between the amounts of AC power. It is practically only in ideal situations that we can expect the PSU to perform at 100%, which is almost impossible. However, modern PSU’s perform at about 70-98% efficiency. So when choosing a good power server, look out for the efficiency.

The Power Supply Output

This is also one of the things to look out for in choosing a good power server. This is the DC output, from which enough power can be supplied to different server components. Currently, IBM servers are some of the best on the market, especially the Power 7 servers.  If you want to read a great review of them, these are the best IBM Power7 Server Reviews available.  The most power-required unit, which is the motherboard and the central processor, is in need of the power supply output.

If you have an old power supply unit that can not cope with the fact that the CPU will consume more power when the load on it intensifies, then the server may just overheat and trip off.



Mean Time Between Failure

This is a way to measure the working capacity of the PSU in normal conditions. You can say that the “Mean Time Between Failure” calculates the lifespan of the PSU. Over time the PSU capacity will drop as a result of over working. The calculation of the Mean Time Between Failure would have to drop at that time. This is one thing you need to check out for when choosing the right power server.

The Power Supply Unit Weight

When we compare the former characteristics of a good power server, most people will not take this one into account.  But hold on a minute, the power supply unit weight is really important. This practically shows the direct evidence of the quality of the power server. For instance, taking two power servers and weigh them. The one that has a lighter weight is less quality that the one with a higher weight because it simply means that there is much more capacity in the one that weighs more. The manufacturer has reduced the capacity in the one that weighed less.

This is one of the reasons of overheating during a high workload. If proper care is not taken this may lead to some damage.

So when choosing the right power server, now you know what to look out for.


What does a traditional RDBMS programmer or architect need to understand to be productive with NoSQL (Not-only SQL technologies) and DCP (data caching platforms)?

I asked this question of our development team.

Here’s their list of things to know:

  1. Understand how ACID compares with BASE (Basically Available, Soft-state, Eventually Consistent)
  2. Understand persistence vs non-persistence, i.e., some NoSQL technologies are entirely in-memory data stores
  3. Recognize there are entirely different data models from traditional normalized tabular formats: Columnar (Cassandra) vs key/value (Memcached) vs document-oriented (CouchDB)  vs graph oriented (Neo4j)
  4. Be ready to deal with no standard interface like JDBC/ODBC or standarized query language like SQL; every NoSQL tool has a different interface
  5. Architects: rewire your brain to the fact that web-scale/large-scale NoSQL systems are distributed across dozens to hundreds of servers and networks as opposed to a shared database system
  6. Get used to the possibly uncomfortable realization that you won’t know where data lives (most of the time)
  7. Get used to the fact that data may not always be consistent; ‘eventually consistent’ is one of the key elements of the BASE model (I see this latency issue all the time in Twitter, in ‘Followers’ list)
  8. Get used to the fact that data may not always be available
  9. Understand that some solutions are partition-tolerant and some are not

These attributes vary from one system to another. It’s as important to understand the differences among NoSQL technologies as it is important to understand how they differ from a traditional RDBMS.

Here is a pretty good list of the many NoSQL products, from a respected member of the community, Alex Popescu.

Learn more about our performance monitoring solution for Java, NoSQL and web servers.

For cisco wireless access point and NoSQL. Visit http://evidentsoftware.com.



The Evident ClearStone Cassandra Management Pack enables comprehensive Cassandra NoSQL performance monitoring. ClearStone collects statistical data from all JVMs in a cluster, and reports key performance metrics, including:

  • Thread pool statistics
  • Column Family Store statistics
  • Commit Log statistics
  • Storage Proxy statistics
  • Storage Service statistics
  • Streaming Service statistics
  • JVM statistics

ClearStone can perform parallel JMX collections from all the Cassandra nodes in the Cassandra NoSQL cluster. The data from these nodes can be consolidated and aggregated into a logical cluster as defined in the collection configuration. This provides an aggregated view of the Cassandra NoSQL clusters. Users can utilize the pre-build perspectives in the Real-Time Dashboard to monitor Cassandra NoSQL performance and other activity characteristics. In addition, administrators can configure additional monitoring policies to alert operators when there are performance issues with the Cassandra JVMs, thread pools, column family stores, etc.

You can try ClearStone for Cassandra NoSQL free. Visit http://evidentsoftware.com.