Eric,
Jonathan is suggesting the approach Jeremiah was using.
Calculate the tokens the nodes in each DC independantly, and then add 1
to the tokens if there are two nodes with the same tokens.
In your case with 2 DC's with 2 nodes each.
In DC 1
node 1 = 0
node 2 =
Jonathan is suggesting the approach Jeremiah was using.
Calculate the tokens the nodes in each DC independantly, and then add
1 to the tokens if there are two nodes with the same tokens.
In your case with 2 DC's with 2 nodes each.
In DC 1
node 1 = 0
node 2 =
D2R2
8 D1R2 D2R2
9 D1R2 D2R2
Each node is responsible for half of the ring in its own DC.
- Original Message -
From: Eric tamme eta...@gmail.com
To: user@cassandra.apache.org
Sent: Wednesday, May 4, 2011 1:58:19 PM
Subject: Re: Replica data distributing between racks
Jonathan
On Wed, May 4, 2011 at 10:09 AM, Konstantin Naryshkin
konstant...@a-bb.net wrote:
The way that I understand it (and that seems to be consistent with what was
said in this discussion) is that each DC has its own data space. Using your
simplified 1-10 system:
DC1 DC2
0 D1R1 D2R2
1
I've been digging into this and worked was able to reproduce something, not
sure if it's a fault and I can't work on it any more tonight.
To reproduce:
- 2 node cluster on my mac book
- set the tokens as if they were nodes 3 and 4 in a 4 node cluster, e.g. node 1
with
Right, when you are computing balanced RP tokens for NTS you need to
compute the tokens for each DC independently.
On Tue, May 3, 2011 at 6:23 AM, aaron morton aa...@thelastpickle.com wrote:
I've been digging into this and worked was able to reproduce something, not
sure if it's a fault and I
Subject: Re: Replica data distributing between racks
Right, when you are computing balanced RP tokens for NTS you need to compute
the tokens for each DC independently.
On Tue, May 3, 2011 at 6:23 AM, aaron morton aa...@thelastpickle.com wrote:
I've been digging into this and worked was able
On Tue, May 3, 2011 at 10:13 AM, Jonathan Ellis jbel...@gmail.com wrote:
Right, when you are computing balanced RP tokens for NTS you need to
compute the tokens for each DC independently.
I am confused ... sorry. Are you saying that ... I need to change how
my keys are calculated to fix this
Jonathan,
I think you are saying each DC should have it's own (logical) token
ring. Which makes sense as the only way to balance the load in each dc. I think
most people assume (including me) there was a single token ring for the entire
cluster.
But currently two endpoints
On Tue, May 3, 2011 at 2:46 PM, aaron morton aa...@thelastpickle.com wrote:
Jonathan,
I think you are saying each DC should have it's own (logical) token
ring.
Right. (Only with NTS, although you'd usually end up with a similar
effect if you alternate DC locations for nodes in a ONTS
On Tue, May 3, 2011 at 4:08 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Tue, May 3, 2011 at 2:46 PM, aaron morton aa...@thelastpickle.com wrote:
Jonathan,
I think you are saying each DC should have it's own (logical) token
ring.
Right. (Only with NTS, although you'd usually end up
That appears to be working correctly, but does not sound great.
When the NTS selects replicas in a DC it orders the tokens available in the
DC, then (in the first pass) iterates through them placing a replica in each
unique rack. e.g. if the RF in each DC was 2, the replicas would be put on
On Mon, May 2, 2011 at 2:18 PM, aaron morton aa...@thelastpickle.com wrote:
When the NTS selects replicas in a DC it orders the tokens available in the
DC, then (in the first pass) iterates through them placing a replica in each
unique rack. e.g. if the RF in each DC was 2, the replicas
On Mon, May 2, 2011 at 3:22 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Mon, May 2, 2011 at 2:18 PM, aaron morton aa...@thelastpickle.com wrote:
When the NTS selects replicas in a DC it orders the tokens available in the
DC, then (in the first pass) iterates through them placing a replica
My bad, I missed the way TokenMetadata.ringIterator() and firstTokenIndex()
work.
Eric, can you show the output from nodetool ring ?
Aaron
On 3 May 2011, at 07:30, Eric tamme wrote:
On Mon, May 2, 2011 at 3:22 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Mon, May 2, 2011 at 2:18 PM,
On Mon, May 2, 2011 at 5:59 PM, aaron morton aa...@thelastpickle.com wrote:
My bad, I missed the way TokenMetadata.ringIterator() and firstTokenIndex()
work.
Eric, can you show the output from nodetool ring ?
Here is output from nodtool ring - ip addresses changed obviously.
Address
On Mon, May 2, 2011 at 5:59 PM, aaron morton aa...@thelastpickle.com wrote:
My bad, I missed the way TokenMetadata.ringIterator() and firstTokenIndex()
work.
Eric, can you show the output from nodetool ring ?
Sorry if the previous paste was way to unformatted, here is a
pastie.org link
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