sword12
asked on
VSAN migration
Dear Vmware Experts
We have VSAN Hybrid cluster 18 nodes with around 370 VMs
Every server has 2 ports every port 10 G
Our core switches has 40 G speed
Right now we have some performance issues most of the performance issues related to the Storage and network performance
So we are going to buy a new 6 servers and we are going to build all Flash VSAN cluster
The new servers will have 2 ports 10 G each and 2 ports 40 G each
Both cluster new one and the old one will be managed under the Vcenter (( we are using VMware distributed switch ))
After we build the new cluster we will start to migrate the most critical VMs from the old cluster to the new cluster one
And here my questions
1- Using V motion changing host and data store between two clusters it will work without issues?
2- When I V motion a VM like file server 40 TB can our user still use this file server or this not possible due to performance issues
My main concern for such plan the effect for availability and performance for the VMs which I want to V motion between the two cluster
Do you have any recommendations to achieve such target with fewer end users interruptions
Kindly advice
We have VSAN Hybrid cluster 18 nodes with around 370 VMs
Every server has 2 ports every port 10 G
Our core switches has 40 G speed
Right now we have some performance issues most of the performance issues related to the Storage and network performance
So we are going to buy a new 6 servers and we are going to build all Flash VSAN cluster
The new servers will have 2 ports 10 G each and 2 ports 40 G each
Both cluster new one and the old one will be managed under the Vcenter (( we are using VMware distributed switch ))
After we build the new cluster we will start to migrate the most critical VMs from the old cluster to the new cluster one
And here my questions
1- Using V motion changing host and data store between two clusters it will work without issues?
2- When I V motion a VM like file server 40 TB can our user still use this file server or this not possible due to performance issues
My main concern for such plan the effect for availability and performance for the VMs which I want to V motion between the two cluster
Do you have any recommendations to achieve such target with fewer end users interruptions
Kindly advice
1. Yes.
2. Yes. to "When I V motion a VM like file server 40 TB can our user still use this file server "
there are no end user interruptions, otherwise the only other method is emergency downtime, and move with the VMs Powered OFF, which is then a migration with downtime, and not a vMotion.
Which will then affect service ?
But you first add....
So something is wrong with the current environment, and how do you know the new environment which you are migrating to, to get away from the issue, is going to fix it.
and if you have something WRONG with current environment, we cannot guarantee that your Storage vMotion's of VMs, is going to go well.
If you already have performance issues, storage vmotion may make the performance on the old cluster even worse, storage vMotions may fail, end user may experience more issues before you've even moved VMs to new cluster.
Have you been advised and had your vSAN design verified by VMware ? Most of the issues with vSAN is the hardware is no vSAN Ready Node approved.
I remember you implementing vSAN....
2. Yes. to "When I V motion a VM like file server 40 TB can our user still use this file server "
Do you have any recommendations to achieve such target with fewer end users interruptions
there are no end user interruptions, otherwise the only other method is emergency downtime, and move with the VMs Powered OFF, which is then a migration with downtime, and not a vMotion.
Which will then affect service ?
But you first add....
Right now we have some performance issues most of the performance issues related to the Storage and network performance
So something is wrong with the current environment, and how do you know the new environment which you are migrating to, to get away from the issue, is going to fix it.
and if you have something WRONG with current environment, we cannot guarantee that your Storage vMotion's of VMs, is going to go well.
If you already have performance issues, storage vmotion may make the performance on the old cluster even worse, storage vMotions may fail, end user may experience more issues before you've even moved VMs to new cluster.
Have you been advised and had your vSAN design verified by VMware ? Most of the issues with vSAN is the hardware is no vSAN Ready Node approved.
I remember you implementing vSAN....
ASKER
Hi Alex
As long as it's configured correctly yes, your host server needs access to both datastores, That's the only requirement.
here the question as i said it is two VSAN clsuters
two VSAN data store
so how can i give an access the old Hybird VSAN cluster hosts to the new all FLASH VSAN cluster data store ?
As long as it's configured correctly yes, your host server needs access to both datastores, That's the only requirement.
here the question as i said it is two VSAN clsuters
two VSAN data store
so how can i give an access the old Hybird VSAN cluster hosts to the new all FLASH VSAN cluster data store ?
Good point, well presented.
ASKER
as we all know the only wayes to let a vsphere host to see data store
1- directly attched storage
2- NFS
3- FC
4- ISCSI
5- VSAN data sstore
so here my issue how can i let the old VSAN cluster hosts be able to see the new VSAN data store
so i can start VMs Vmotins to change hosts and data stores
should i use iscsi ?
1- directly attched storage
2- NFS
3- FC
4- ISCSI
5- VSAN data sstore
so here my issue how can i let the old VSAN cluster hosts be able to see the new VSAN data store
so i can start VMs Vmotins to change hosts and data stores
should i use iscsi ?
ASKER
as i said before because we are using VMware distributed switch
so the hosts which member's in the old VSAN cluster will be able to see the hosts in the new VSAN cluster
so all hosts connected on network level
now my question which i am thinking about how can i or which approach i have to take to let the old VSAN cluster hosts be able to access the new VSAN data store
if i found the right approach then i can make vmotion to our production VMs
about performance issues (( it just because the old cluster over loaded )) so in worst case i can shutdown our test systems to reduce the load
but now i need an advice about my question
thnaks
so the hosts which member's in the old VSAN cluster will be able to see the hosts in the new VSAN cluster
so all hosts connected on network level
now my question which i am thinking about how can i or which approach i have to take to let the old VSAN cluster hosts be able to access the new VSAN data store
if i found the right approach then i can make vmotion to our production VMs
about performance issues (( it just because the old cluster over loaded )) so in worst case i can shutdown our test systems to reduce the load
but now i need an advice about my question
thnaks
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
As long as it's configured correctly yes, your host server needs access to both datastores, That's the only requirement.
2- When I V motion a VM like file server 40 TB can our user still use this file server or this not possible due to performance issues.
In theory it won't be an issue, from my understanding as long as the host server has access to both the source and destination datastores, it'll move the changed files as expected.
Realistically though, I'd configure this for an OOH migration just to be on the safe side, I doubt it's needed though.