Re: [MooseFS-Users] Fwd: CHUNKS_LOOP_MAX_CPS clarification

[Davies L. <dav...@gm...>]

It's checked on every chunk server, also configurable (HDD_TEST_FREQ),
so it's possible to check all the chunks in 2 months
(HDD_TEST_FREQ=1). If you have more chunk servers, it will be faster.

On Fri, May 11, 2018 at 7:34 AM, Gandalf Corvotempesta
<gan...@gm...> wrote:
> Clear
> So, CRC testing is almost useless, because one chunk every 10 sec, would
> need years to fully test a cluster
>
> Il ven 11 mag 2018, 00:53 Davies Liu <dav...@gm...> ha scritto:
>>
>> This loop only check status and goals of chunks, no CRC. CRC is
>> randomly tested by chunk server (1 in every 10 seconds).
>>
>> On Fri, May 11, 2018 at 1:19 AM, Gandalf Corvotempesta
>> <gan...@gm...> wrote:
>> > Yes, sorry, my mistake but is still impossibile to scan 4.000.000 chunks
>> > checking for CRC, in 300 seconds.
>> >
>> >
>> >
>> > Il gio 10 mag 2018, 18:35 Davies Liu <dav...@gm...> ha scritto:
>> >>
>> >> max(40, 300) = 300
>> >>
>> >> 2018-05-11 0:17 GMT+08:00 Gandalf Corvotempesta
>> >> <gan...@gm...>:
>> >> > Il giorno gio 10 mag 2018 alle ore 16:50 Davies Liu
>> >> > <dav...@gm...>
>> >> > ha scritto:
>> >> >> max(N/CHUNKS_LOOP_MAX_CPS, CHUNKS_LOOP_MIN_TIME)
>> >> >
>> >> > So,
>> >> > N=4000000
>> >> > CHUNKS_LOOP_MAX_CPS = 100000
>> >> > CHUNKS_LOOP_MIN_TIME = 300
>> >> >
>> >> > to scan 4.000.000 chunks, I need
>> >> >
>> >> > max(4000000/100000, 300) = 40 seconds ?
>> >> >
>> >> > That's impossible.
>> >>
>> >>
>> >>
>> >> --
>> >>  - Davies
>>
>>
>>
>> --
>>  - Davies



-- 
 - Davies