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January 10th, 2018 21:00
read/write policy in a storage group
hello.it seems a very newbie question but i cant find the answer on net.
i make it simple.here is the situation.there is a LUN and two hosts in a storage group. host 1 and host 2. hosts have same authorities to access the LUN. my question is , what happens if host 1 delete something that is important for host 2? or host 2 write things in LUN which are not usable for host 1. my question is what will be the policy of read/write/delete in a storage group?
Rainer_EMC
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January 11th, 2018 02:00
SAN block storage is NOT like NAS file storage
a LUN is rarely used by two hosts at the same time.
IF it is then its the responsibility of the client operation system / Hypervisor to ensure consistency
the only use I know there its managed by a cluster file system
Usual case for two hosts (besides VMware) is cluster software where only one hosts access the LUN until there is a failover
kelleg
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January 24th, 2018 11:00
If two or more hosts have access to the same LUN, you must have clustering software running on the hosts. The array provides no protection in this case.
glen