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From Nitin Mehta <>
Subject Re: HA question
Date Thu, 28 Feb 2013 04:43:26 GMT
CS has its own HA logic and doesn't use the native HA of the HV and so the
question for enabling the HA for hosts doesn't arise. This is true for XS.
For Vmware and KVM, I will let the guru's speak :)

On 28/02/13 9:55 AM, "" <> wrote:

>Thanks that¹s awesome, but not quite the answer I was looking for.
>To better phrase my question, if the cluster is the basic unit of
>availability, when hosts are enabled for HA, must all hosts in the
>cluster be enabled? Or can the cluster exist with a non-uniform
>structure, having only some hosts enabled for HA?
>You partially answered it with the special reserve HA hosts, but I'm
>looking more in terms of general use.
>>-----Original Message-----
>>From: Hari Kannan []
>>Sent: Wednesday, February 27, 2013 8:21 PM
>>Subject: RE: HA question
>>Hi Kelsey,
>>HA is at 2 levels ­ VMs can be marked HA. In addition, you can mark some
>>hosts as reserved for ³Dedicated² HA hosts. Quoting from the manual, the
>>dedicated HA option is set through a special host tag when the host is
>>To allow the administrator to dedicate hosts to only HA-enabled VMs, set
>>global configuration variable ha.tag to the desired tag (for example,
>>"ha_host"), and restart the Management Server. Enter the value in the
>>Tags field when adding the host(s) that you want to dedicate to
>>From: Kelcey Damage (BT) []
>>Sent: Wednesday, February 27, 2013 8:00 PM
>>To: CloudStack dev list
>>Subject: RE: HA question
>>I can¹t remember, do we enable HA on a per host basis, or on a per
>>[cid:image001.png@01CE1524.FA0D61B0]Kelcey Damage Infrastructure
>>Systems Architect
>>address: 55 East 7th Ave, Vancouver, BC, V5T 1M4
>>tel: +1 604 713 8560 ext:114
>>fax: +1 604 605 0964
>>skype: kelcey.damage

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