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sword12

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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
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sword12

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