This is new for the upcoming Version 3 from BVQ (Nov 13)
BVQ can now scan on 1 minutes interval. It is incredible who much detail becomes uncovered when you scan on 1 minute.
Why does this matter?
A smaller scan interval will allow even deeper looks into the system.
The possibility to change these settings on the fly without any interrupt supports normal ands deep analysis mode.
To switch from 5 minutes to 1 minute is easy and does not need any special activity!
You just change the timing of the statistics... [More]
We had a very interesting month. We have fixed performance problems on 3 different V7000 Systems in Europe - all of them are running much better now. The problems have been found in very different places: SAN, Cache Overload, Compression, ...
In no case we had to extend a system - all was solved with changes in setup only.
Do not hesitate to call us when you have performance problems with a Storwize or with a SVC. We will use BVQ to locate the reason for it. No risk for you, no purchase obligation.
Call us:... [More]
This was a very exiting and successful week!
This is a customer success story where BVQ helped to fix performance issues in a Red Hat Enterprise Virtualization (RHEV) environment with IBM Storwize V7000 storage. The Red Hat environment is set up with six storage volumes which have been thin provisioned and compressed to optimize the capacity efficiency.
Unacceptable performance of the RHEV
The situation in the beginning of the project was that the performance of the RHEV environment was reduced due... [More]
A very useful method is the analytical storage planning based on measurement data. In the following example, the MS Exchange-area of a company was analyzed to determine the required supply power.
see attached picture
Fig 2: measured values allow a very precise planning of power consumption and thereby reduce purchasing costs and operating costs. Another positive effect is the safety which results from this planning. These measurements show exactly how much power is needed for an environment. If this demand is covered by the... [More]
Overview: cost savings potential with BVQ
There are several areas in which BVQ can help to reduce procurement costs, operating costs and operating risks.
This document describes these areas where BVQ helps to save costs.
Reduction of purchasing costs
With measurements and appropriate presentation of results in the form of treemaps associated with IO density colorations, BVQ provides an excellent base to obtain a better assessment about the required amount of performance. In most cases this leads... [More]
In this customer example we had the opportunity that two identical managed disk groups with easy tier did perform completely different.
The Target was to understand why and to find ways to improve the situation.
Both managed disk groups have the same technical setup.
V7000 -1 (Cluster 1) we found that the improvements which have been expected by Easy Tier have not been achieved
V7000- 2 (Cluster 2) showed much better results for Easy Tier
Click here to open the analysis
it is now much easier to perform BVQ demo installation.
Just send us a mail, we will organize everything needed to start a successful demo.
You can also combine this demo with a SVC / Storwize system check.
Request a BVQ Demo
or just send us a mail to
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