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StarWind VSAN Free: L2 Cache and Node-Majority with PS

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StarWind VSAN Free: L2 Cache and Node-Majority with PS

Postby alexfersh » Sun Jan 06, 2019 6:43 pm

Hello dear StarWind Team!

A lot of thanks for your wonderful product - StarWind VSAN!
I've been using it for Hyper-Converged POC in 2-node and 3-node design, and strongly consider buying the commercial version in the nearest future to use in the production environment.

Could you please clarify the following aspects:

1. In the latest StarWind VSAN builds - 8.0.12585 and 8.0.12658 - is it possible to configure L2 write-through cache with PowerShell scripts (VSAN Free license), and if it is, then how?
I've tried to do this according to the "Adding, Changing and removing L2 cache" guidance, but with no success. L1 RAM cache can be configured and works without issues though.

2. Is it possible and how to configure SW VSAN cluster in Node-Majority mode with a Witness node with PowerShell (VSAN Free license, builds 8.0.12585 and 8.0.12658)?

Looking forward for your kind reply.
Thank you very much in advance.

Best regards,
Alex Fershtein
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Re: StarWind VSAN Free: L2 Cache and Node-Majority with PS

Postby Boris (staff) » Tue Jan 08, 2019 3:12 pm

alexfersh,

When speaking about L2 cache, do you mean the normal L2 cache or Log Write-structured Cache? (LWC) that was introduced in those builds? Ordinary L2 cache functionality is added as instructed in https://knowledgebase.starwindsoftware. ... dance/661/ If LWC was meant, then the answer is "It's not yet possible with PowerShell, but will be added in future releases".
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Re: StarWind VSAN Free: L2 Cache and Node-Majority with PS

Postby alexfersh » Tue Jan 08, 2019 3:56 pm

Hello Boris,

Thank you for the answer.

In fact, I mean a regular L2 cache on SSD.
I've strictly followed recommendations as per the guidance you've mentioned, but haven't succeeded.
Anyway, this is a method of adding L2 cache with editing header files manually, not via Powershell.
Is there any possibility to accomplish the same then creating HA image device(s) with Powershell?

And what about creating VSAN HA devices with Node-Majority failover strategy and Witness node via Powershell?

A lot of thanks in advance.

Kind regards,
Alex Fershtein
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Re: StarWind VSAN Free: L2 Cache and Node-Majority with PS

Postby Boris (staff) » Tue Jan 08, 2019 3:57 pm

As for your second question, Node Majority is not available for configuration with PowerShell yet.
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Re: StarWind VSAN Free: L2 Cache and Node-Majority with PS

Postby Boris (staff) » Tue Jan 08, 2019 4:52 pm

You can configure L1 cache when creating HA devices via PowerShell, but not L2 cache.
I would just advise you to go through the guide once again and make sure you do everything as described. Also, make sure that IDs of the disks do not get duplicates. Each ID should be unique (L1 / L2 / actual data .img file).
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Re: StarWind VSAN Free: L2 Cache and Node-Majority with PS

Postby umate » Tue Feb 12, 2019 8:58 pm

Hello Boris,

are there any plans for adding node majority to PS anytime soon? Heartbeat failover doesn't fail over automatically in my test when the SYNC network goes down first and the heartbeat network second.

Greetings,

Mate

Boris (staff) wrote:As for your second question, Node Majority is not available for configuration with PowerShell yet.
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Re: StarWind VSAN Free: L2 Cache and Node-Majority with PS

Postby Oleg(staff) » Thu Feb 14, 2019 10:25 am

Unfortunately, this option is under development.
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