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Very Slow VMware Creation Times
Just purchased a Unity 600F and have it connected to our local vCenter. Under Storage | VMware | Datastores, we launch the wizard and then follow the steps to creating a 5TB volume. Once it is completed, it takes almost 1 hour to create the Datastore and then one by one rescan each host. We changed the name in Unity and it once again took almost an hour to change the name and rescan all 18 hosts.
Under VNX and CX4, you would create the LUN, slap it in a Storage Group and then rescan in VMware which took all of about 10 minutes, maybe.
With the inability to create multiple LUNs at once and the slow serial rescan of hosts, it has taken 5 hours to create 5 LUNs and rename one.
Is this normal?
Yes. It turns out that the Unity box performs a few extra rescans and discover per host and it does them serially and not in parallel. I can rescan all 21 hosts in VMware for a new LUN but when using the Unity to provision, it just takes a hour. Support has been made aware; hopefully we will see a code bump in the near future
odonovan_kevin
33 Posts
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Posted March 10th, 2017 03:00
Any luck with this one? I seem to have a similar issue, taking a long time creatng a VMware datastore on Unity, and seeing delays between the hosts which have access to it in the cemtracer_hosts.log file.
jmaguileramontero
2 Intern
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156 Posts
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Posted July 28th, 2017 10:00
Hello,
I have the same problem, create datastore from unity takes much times?
When I rescan LUN has the same problem.
DELL-Sam L
Community Manager
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8118 Posts
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34619 Points
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Posted February 13th, 2020 08:00
Hello SebasLag,
Here is a link to Dell EMC Unity: VMware vSphere Best Practices guide, where we have our best practices for Unity deployment & configuration. https://dell.to/38nrIyQ
Here is also the link to Configuring Hosts to Access VMware Datastores. https://dell.to/2HknBYf
Please let us know if you have any other questions.
Victor Wu
1 Rookie
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106 Posts
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Posted November 20th, 2016 08:00
Did you check the host compatibility with Unity systems, eg host HBA driver/firmware etc ?
Victor Wu, Chief Enterprise Architect