VSAN question

Hi all

i am reading about VSAN Architecture and i want to understand how VSAN will behave for hardware failure
so what i found

1- A magnetic disk failure : it is look like no big performance or timeout issue
 If there is a read I/O targeted as the magnetic disk fails, the I/O is intercepted at the VSAN layer, which then redirects the read I/O to other replicas

2- A flash device failure : this  will bring performance issue because of reads that were serviced from the active dataset in the flash device, will now actually need to be fetched from the magnetic disk

3- A host failure : The virtual machines are restarted on other hosts in the cluster while VSAN ensures object availability . Then VSAN initiates the 60 minute timer. If the host returns within this threshold, the components resync with their counterparts to ensure that there is no delta. Beyond 60 minutes, component regeneration is initiated. The failed host may still return to the cluster,

the questions is

1- can i change this time from 60 min to something ells
2- in case the host problem only network or power supply also in this case after 60 min if we bring the host back the VSAN will regenerate the data
3- in which case, VSAN decides whether to pursue component regeneration or delta resync with the returned host.

please i need clear information about VSAN behavior once we have hardware issues

thanks
Sword
LVL 1
sword12Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

sword12Author Commented:
i found the answer

when a host fails VSAN typically does not know why this happened, or even what has happened exactly. Is it a host failure, a network failure, is it transient
or permanent, and so on. Should this occur, the affected components are said to be in an “absent” state. Let’s say that we have suffered a permanent host
failure in this scenario.
As soon as VSAN realizes the component is absent, a timer of 60 minutes will start. If the component comes back within those 60 minutes, VSAN will
synchronize the replicas. If the component doesn’t come back, VSAN will create a new replica,
Note that you can decrease this time-out value by changing the advanced setting called VSAN.ClomRepairDelay on each of your ESXi hosts in the
Advanced Settings section. If you want to change this advanced setting, we highly recommend ensuring consistency across all ESXi hosts in the cluster by
scripting the required change and to monitor on a regular basis for consistent implementation to avoid inconsistent behavior.

thanks
sword
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
VMware

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.