On Mon, Feb 1, 2021 at 8:37 PM Gianluca Cecchi
<[email protected]> wrote:
>
>
>
> On Mon, Feb 1, 2021 at 6:51 PM David Teigland <[email protected]> wrote:
>>
>> On Mon, Feb 01, 2021 at 07:18:24PM +0200, Nir Soffer wrote:
>> > Assuming we could use:
>> >
>> >     io_timeout = 10
>> >     renewal_retries = 8
>> >
>> > The worst case would be:
>> >
>> >  00 sanlock renewal succeeds
>> >  19 storage fails
>> >  20 sanlock try to renew lease 1/7 (timeout=10)
>> >  30 sanlock renewal timeout
>> >  40 sanlock try to renew lease 2/7 (timeout=10)
>> >  50 sanlock renewal timeout
>> >  60 sanlock try to renew lease 3/7 (timeout=10)
>> >  70 sanlock renewal timeout
>> >  80 sanlock try to renew lease 4/7 (timeout=10)
>> >  90 sanlock renewal timeout
>> > 100 sanlock try to renew lease 5/7 (timeout=10)
>> > 110 sanlock renewal timeout
>> > 120 sanlock try to renew lease 6/7 (timeout=10)
>> > 130 sanlock renewal timeout
>> > 139 storage is back
>> > 140 sanlock try to renew lease 7/7 (timeout=10)
>> > 140 sanlock renewal succeeds
>> >
>> > David, what do you think?
>>
>> I wish I could say, it would require some careful study to know how
>> feasible it is.  The timings are intricate and fundamental to correctness
>> of the algorithm.
>> Dave
>>
>
> I was taking values also reading this:
>
> https://access.redhat.com/solutions/5152311
>
> Perhaps it needs some review?

Yes, I think we need to update the effective timeout filed. The value
describe how sanlock and multipath configuration are related, but it
does not represent the maximum outage time.
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