You can see where this might start to cause problems. Last week VMware released vSphere 6. In order to test this, our engineers decided to push the limits of the system. September 9, 1. With Hardware Assisted Locking, the ESX server will lock only the block s it's actually writing to , not the entire volume. To find out more, including how to control cookies, see here:
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By continuing to use this website, you agree to their use. They set up a single VMFS datastore on one of our arrays, spread across only five disk drives. It's always a bear to be perfectly honest since it encompasses all best practices but the blog can only buy me so much time before we need it in official form. At the moment, VAAI is only available for block-based storage i.
In so doing they offered users two option: I wrote a Dell EMC KB article last week about VAAI and SRDF performance considerations to assist customers in certain corner cases, but my support colleagues tell me they've had more than a few requests for the information, so I'm going to put most of it here as reference. September 24, 0.
Category: VAAI
Without VAAI, if the ESX server needed to write the same block 37 times in a row, it would send 37 identical blocks to the storage array. So in vSphere 6.
VMware is close to a fix, I've done some testing already. VAAI changes this dramatically.
VAAI – Dell EMC PowerMax with VMware
There e,c at least a hundred exciting things about this announcement, but to me, two things in particular go right to the top of the list: I'm finally allowed to talk about vSphere 4.
April 17, 5.
Rather than a checkbox, however, VMware has what appears to be a scale which would allow the user to decide how aggressive UNMAP should be. Last week VMware released vSphere 6.
On our storage array using pre-VAAI software, the results were, as you might imagine, not great.
The chances of a conflict increase, and in the event of a conflict, any given VM might have to wait for more than one write to complete before it gets its turn.
But it's not just about the greater efficiency, or ease of management you'll get from Hardware Assisted Locking. I've managed to get The difference is even more dramatic in our Storage vMotion example.
I'll give two examples: The issue occurs only when attempting to run May 8, 5.
VMware's vSphere is built on an open architecture of APIs Application Programming Interfaces that make it easy for partners' software to operate and interact with vSphere.
The VAAI paper mentions that there is a column available called "Extent Based Clone" which will display source or target depending on how the device is being used; but that has very limited I can't think of another application with this degree of storage-awareness built-in.
A new vSphere release always means lots of new features, and I'd be a fool to try to enumerate them seeing as there is a document for that.
It's powerful and fast, period. They then loaded VMs onto the datastore, and attempted to boot all of them. In order to test this, ec engineers decided to push the limits of the system. You can see where this might start to cause problems. To find out more, including how to control cookies, see here: Today VMware has posted the newest release of their flagship vSphere product, 6. July 5, 5.
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