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[John Buczkowski <jx...@tiac.net>]

From: eugene miretsky [mailto:eugene.miretsky@gmail.com] 
Sent: Thursday, April 06, 2017 4:36 PM
To: user@cassandra.apache.org
Subject: Why are automatic anti-entropy repairs required when hinted hand-off is enabled?

 

Hi, 

 

As I see it, if hinted handoff is enabled, the only time data can be inconsistent is when:

1.	A node is down for longer than the max_hint_window
2.	The coordinator node crushes before all the hints have been replayed

Why is it still recommended to perform frequent automatic repairs, as well as enable read repair? Can't I just run a repair after one of the nodes is down? The only problem I see with this approach is a long repair job (instead of small incremental repairs). But other than that, are there any other issues/corner-cases? 

 

Cheers,

Eugene 

Re: Unsubscribe

[Nate McCall <na...@thelastpickle.com>]

Hi John,
Please send an email to user-unsubscribe@cassandra.apache.org to
unsubscribe from this list.

On Fri, Apr 7, 2017 at 8:58 AM, John Buczkowski <jx...@tiac.net> wrote:

> *From:* eugene miretsky [mailto:eugene.miretsky@gmail.com]
> *Sent:* Thursday, April 06, 2017 4:36 PM
> *To:* user@cassandra.apache.org
> *Subject:* Why are automatic anti-entropy repairs required when hinted
> hand-off is enabled?
>
>
>
> Hi,
>
>
>
> As I see it, if hinted handoff is enabled, the only time data can be
> inconsistent is when:
>
>    1. A node is down for longer than the max_hint_window
>    2. The coordinator node crushes before all the hints have been replayed
>
> Why is it still recommended to perform frequent automatic repairs, as well
> as enable read repair? Can't I just run a repair after one of the nodes is
> down? The only problem I see with this approach is a long repair job
> (instead of small incremental repairs). But other than that, are there any
> other issues/corner-cases?
>
>
>
> Cheers,
>
> Eugene
>