You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by K F <kf...@yahoo.com> on 2015/06/12 02:01:34 UTC
Question about consistency in cassandra 2.0.9
Hi,
I am running a cassandra cluster with 4 dcs. Out of 4 dcs, I have 3 DCs returning right data but 1 dc where I had 1 node down, the data didn't return correct records.
So, e.g. DC1 - 386 records (single-token based DC)DC2 - 386 records (vnode based DC)DC3 - 386 records (vnode based DC)DC4 - 178 records (vnode based DC)
In DC4 I had one node down due to hardware failures and was getting another spare node bootstrapped. Then why would during bootstrapping process or when 1 node is down in DC4, I would get incorrect records.
Thanks
Regards,Ken
Re: Question about consistency in cassandra 2.0.9
Posted by K F <kf...@yahoo.com>.
So, here is the configuration
DC 1 - 32 single tokenDC 2 - 32 nodes configured as vnodesDC 3 - 32 nodes configured as vnodesDC 4 - 32 nodes configured as vnodes
Write CL just 2 days backs was one and it was changed to LOCAL_QUORUMRead CL has always been ONE
I am running on 2.0.9 version of cassandra.
Regards,Ken
From: graham sanderson <gr...@vast.com>
To: user@cassandra.apache.org; K F <kf...@yahoo.com>
Sent: Thursday, June 11, 2015 8:14 PM
Subject: Re: Question about consistency in cassandra 2.0.9
It looks (I’m guessing with entirely not enough info) that you only have two nodes in DC4, and are probably writing at QUORUM reading at LOCAL_ONE. But please specify your configuration
On Jun 11, 2015, at 7:01 PM, K F <kf...@yahoo.com> wrote:
Hi,
I am running a cassandra cluster with 4 dcs. Out of 4 dcs, I have 3 DCs returning right data but 1 dc where I had 1 node down, the data didn't return correct records.
So, e.g. DC1 - 386 records (single-token based DC)DC2 - 386 records (vnode based DC)DC3 - 386 records (vnode based DC)DC4 - 178 records (vnode based DC)
In DC4 I had one node down due to hardware failures and was getting another spare node bootstrapped. Then why would during bootstrapping process or when 1 node is down in DC4, I would get incorrect records.
Thanks
Regards,Ken
Re: Question about consistency in cassandra 2.0.9
Posted by graham sanderson <gr...@vast.com>.
It looks (I’m guessing with entirely not enough info) that you only have two nodes in DC4, and are probably writing at QUORUM reading at LOCAL_ONE. But please specify your configuration
> On Jun 11, 2015, at 7:01 PM, K F <kf...@yahoo.com> wrote:
>
> Hi,
>
> I am running a cassandra cluster with 4 dcs. Out of 4 dcs, I have 3 DCs returning right data but 1 dc where I had 1 node down, the data didn't return correct records.
>
> So, e.g.
> DC1 - 386 records (single-token based DC)
> DC2 - 386 records (vnode based DC)
> DC3 - 386 records (vnode based DC)
> DC4 - 178 records (vnode based DC)
>
> In DC4 I had one node down due to hardware failures and was getting another spare node bootstrapped. Then why would during bootstrapping process or when 1 node is down in DC4, I would get incorrect records.
>
> Thanks
>
> Regards,
> Ken