As you may have noticed, there is no publicly available Sizing Spreadsheet for the newly released D6 yet. It is my understanding that they are still collecting data and refining it so that they have a high enough level of confidence to back it. However, I was able to get a draft copy recently and I wanted to share some observations.
And no, I cannot send you a copy. If you need one, contact your EMC Account Representative.
When reading these, keep in mind that I didn’t do a full analysis. I just moved my sizing data from the latest 5.3 spreadsheet to the D6 spreadsheet. Also note that this is a DRAFT. The publicly released version may give different results if they make refinements.
- No change to the Full Text sizing. No surprise there as the engine is the same.
- The Content Server requires almost 3 times the amount of RAM. This is due to the increased overhead of WebLogic versus Tomcat. It isn’t an unreasonable amount. It just means that you actually need to look at that field now.
- Only two User Interfaces were listed, Webtop and TaskSpace on the data collection. I’m assuming that is because if you are using something like Web Publisher, then your Web Application overhead will be the same as if you use Webtop. Obviously Web Publisher users are more likely to be heavy users, so that will change, but there are places for that as always.
- The database usage seemed to require almost 60% less RAM, regardless of choosing Oracle or SQL Server. In fact, it seems like a large chunk, but I don’t have any metrics to back that feeling up.
- There doesn’t seem to be a difference between JVM versions. I think that this is because they only support one version for this release so it doesn’t matter. I expect this will change over time.
Things I’d Like to See
There are a few things I’d like to see in the Spreadsheet. These comments are not specific to the D6 version.
- SQL Server 2000 and 2005 as options. Right now only SQL Server is an option, and I believe that it is still using SQL Server 2000 performance data as it is not dissimilar from older spreadsheets. Check the EMC White Paper, or read my post on SQL Server 2005 for some hints on the differences.
- A better understanding of the usage of the RAM. There is a certain amount of overhead with the application. Then you add the variable components on top of that. Say, for instance, your Content Server. What is the basic “turn-it-on” cost, the user cost, and the Indexer cost?
- It would be nice if there was one spreadsheet that let you pick the version that you were using of Documentum. I know this makes it much more complicated, but it allows me to keep track of only one.
- In addition to Webtop and TaskSpace, how about a column for DFS? This may be a metric collection issue at this point. However, it is a data point that I know I need.