I just found this vmware knowledge base article in the web
Slow performance during Storage vMotion, Clone, and Snapshot consolidation operations in various storage systems (2007723)
I think one of the solutions to this problem can be found in the behavior that we have described here
The bad thing for this is - you will probably not see this problem when you cannot go deeper into the system.
Performance Analysis VAAI undercover write operations
Performance Bottleneck Analysis- VAAI undercover... [More]
This is a small history of changes we saw in a customer situation with several performance issues in a VMware environment.
In the beginning the customer had Buffer Credit Waits of more than 51%.
This means that in the timeframe (5 minutes every morning – see needles) the SAN was only available half of the time to accept writes.
We gave the customer 3 tips to improve this situation
Rebalance the load on the node ports
Reduce SAN traffic between the SVC nodes – do... [More]
I'm really excited about this next option in our mdisk group analysis section. It is the first time that we can analyse into the internal SVC queues down to the storage system.
With this new option we get a much better view of the performance problems of the storage system.
It is obvious that this backend storage system was in deep performance troubles from 5 am to 6:30 am.
Have a look to this:
The picture belongs to this whitepaper
Sometimes dead links happen - we had 2 dead links on the page which have been fixed right now!
The german version of the article was missing.
The external connection to searchstorage was broken rue to the fact that they have been renamed to datacenter.insider.de - I still have an issue because the first half ot the article is still mjissing. I am in contact with them to fix this.
BVQ Use Case: Performance Bottleneck Analysis on IBM SVC and IBM Storwize
With using min and max cache fullness values one can better analysis what is going on in the SVC or Storwize cache. This is espacially helpful when you want to find the root causes of performance bottleneck.
This document belongs to the BVQ Use Case Performance Analysis
We finally added the flyer for the German Post Reference Story "V7000 with BVQ"
An interesting point for this Reference is that German Post did a pre project with the existing SVN environment with BVQ performance monitoring.
With the measured data from their old system the Customer was able to taylor the new storage system exactly to their needs.
During a technical pre-project using the previous SVC... [More]
I really like the idea of having a turbo option on the Storwize V3700, to quickly solve performance restrictions.
But I also learned that many performance issues cannot be solved with only adding more performance power to the system. When you do so then it might happen that you see some improvements but you will be in the same situation again after some time.
Whats coming next? Next size storage system?
So I think it makes sense to better first analyze and find the reason for the performance issue. Even more, when I... [More]
In this example we will see that the usage of the VAAI is somehow hidden from ordinary monitoring methods because the VAAI data streams are not visible on the top SCSI layers. So it might look like a system reacts overloaded without any reason but the reason can be uncovered when you look deeper into the system when your analysis tool is tailored good enough to SVC/Storwize and enables you to see needed the performance indicators.
You find more detail here : full document
Edge 2013 Ambuj Goyal GM Storage & Networking IBM mentioned BVQ in the opening session, as an example for extending Storwize/SVC with analytics
"… 2nd generation SDS was,to convert Storwize to industry led innovations, by extending with open standards.. so any company can write capabilities on it … SVA doing analytics … " he talked about BVQ from SVA
We had some time now, were we helped the IBM labs to test BVQ as an extension to Storwize and it worked.
Future thinking - why... [More]
last week I had a discussion with one of our customers - we were talking about sens and nonsense of monitoring.What is the difference between monitoring and analysis?
The reason for this discussion was again an article in the web with an performance analysis which stopped at the point where the problem became visible in the graphs but there was no further step to deeper understand an solve this problem.
The main reason for this was, that there was no tool which allowed to do an deeper analysis.
This analysis tool was a... [More]
Avoid mission critical security vulnerabilities with Service
Level Management a practical approach
We mirror storage volumes, especially in mission critical environments, to avoid that a simple technical failure leads to application downtime and loss of production.
With SVC or Storwize it is very easy to migrate volumes between different storage systems, and with this it may happen that two sides of a mirror are moved to the same site or even worse to the same storage system.
Highly explosive to this situation is, that SVC or... [More]
I finished the translation of the BVQ Accounting Package specs
With the BVQ Accounting Package, BVQ can work with organizational objects such as cost centers, application groups, applications and volume groups. The SVC/Storwize volumes can be assigned to these organizational units, which then can be used for chargeback and different monitoring purposes.
These new organizational objects are also included in the BVQ Treemap - without restrictions and in the same way as any other SVC storage object - to display capacity and... [More]
We actually run a program that we call the HKC Analysis or more simple health check.
One part of this analysis is to check the SVC for typical performance risks.
I have collected some principal steps of this kind of analysis.
We call this part of the HKC analysis the "performance risk analysis".
If you are interested in this kind of analysis
you will find more informations here: HKC Analysis Checklist
or send a mail for more information to email@example.com
We have more and more people installing BVQ by themselves - I am happy that this is working fine.
If you want to do this then you find all needed informations and the code here:
BVQ Releases and Downloads (download page)
BVQ Installation Manual (how to install)
BVQ Releases und Downloads
There are some steps needed to understand and customize BVQ
I collect this information here: