[DRBD-user] How long does it take OOS to clear

[Digimer]

8.9.2 is the utils version, what is the kernel module version?
(8.3.x/8.4.x/9.0.x)?

It's possible something paused sync, but I doubt it. You can try
'drbdadm resume-sync all'. The oos number should change constantly, any
time a block changes it should go up and every time a block syncs it
should go down.

What protocol are you using? A, B or C?

digimer

On 2019-10-21 11:31 a.m., G C wrote:
> I'm seeing OOS not being cleared for many days if not weeks, i.e. the
> OOS number stays the same.
> 
> Is there a way to tell if the blocks that are OOS are changing or if
> it's the same ones that are just taking a very long time to sync with
> the secondary?
> 
> Version: 8.9.2
> 
> On Mon, Oct 7, 2019 at 7:55 AM Digimer <lists at alteeve.ca
> <mailto:lists at alteeve.ca>> wrote:
> 
>     Out of Sync is a question of what has changed locally versus what has
>     reached the peer. It seems like you're generating changes on the Primary
>     faster than the Secondary can receive them. So one answer is to speed up
>     your replication link and/or the speed of the storage on the Secondary,
>     depending on which is the bottle-neck.
> 
>     The other option is to switch to "Protocol C", which tells DRBD to not
>     consider a write complete until it has reached both nodes. This will
>     effectively slow down your Primary node's storage to whatever speed the
>     Secondary can be written to, however, and may not be acceptable in your
>     use case (see back to point 1 above).
> 
>     digimer
> 
>     On 2019-10-07 10:40 a.m., G C wrote:
>     > I have an instance that seems to get OOS down lower and once in a
>     while
>     > it hits 0 but not very often.  Typically my oos is about
>     180000-200000,
>     > is there a way to clear this outside of the verify which takes a long
>     > time?  Is there something deeper I can dig into that would stop
>     the oos
>     > from occurring?
>     >
>     > Thank you
>     >
>     >
>     >
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> 
>     -- 
>     Digimer
>     Papers and Projects: https://alteeve.com/w/
>     "I am, somehow, less interested in the weight and convolutions of
>     Einstein’s brain than in the near certainty that people of equal talent
>     have lived and died in cotton fields and sweatshops." - Stephen Jay
>     Gould
> 


-- 
Digimer
Papers and Projects: https://alteeve.com/w/
"I am, somehow, less interested in the weight and convolutions of
Einstein’s brain than in the near certainty that people of equal talent
have lived and died in cotton fields and sweatshops." - Stephen Jay Gould