Small correction:
The token range for each node is (Previous_token, My_Token].
( means exclusive and ] means inclusive.
So N1 is responsible from X+1 to A in following case.
maki
2012/1/11 Roland Gude :
>
>
> Each node in the cluster is assigned a token (can be done automatically –
> but usually
I'm trying to port the Hadoop InputFormat to Peregrine (another map reduce
impl I'm working on) …
http://peregrine_mapreduce.bitbucket.org/
The problem is that I can't get it to work with my config because the
documentation is a bit sparse.
I could probably spend a ton of time tracking this down
Is anyone familiar with any tools that are already available to allow for
configurable synchronization of different clusters?
Specifically for purposes of development, i.e. Dev, staging, test, and
production cassandra environments, so that you can easily plug in the
information that you want to fi
Thanks, this makes sense. I'll try that.
Maxim
On 1/6/2012 10:51 AM, Vitalii Tymchyshyn wrote:
Do you mean on writes? Yes, your timeouts must be so that your write
batch could complete until timeout elapsed. But this will lower write
load, so reads should not timeout.
Best regards, Vitalii T
> What we want is to partition the cluster with respect to key spaces.
Why do you want to do this ? (It's probably a bad idea)
Background in here on the partitioner, placement strategy and the snitch
http://thelastpickle.com/2011/02/07/Introduction-to-Cassandra/
Now here's how to do it….
Use t
> * Grab the system sstables from one of the 0.7 nodes and spin up a temp
> 1.0 machine them, then use the command.
>
Grab the *system* tables Migrations , Schema etc. in cassandra/data/system
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpick
Inspired by twitter's rainbird project, Countandra is a hierarchical
distributed counting engine at scale.
It provides a complete http based interface to both posting events and
getting queries. The syntax of a event posting is done in a FORMS
compatible way. The result of the query is emitted in
Each node in the cluster is assigned a token (can be done automatically - but
usually should not)
The token of a node is the start token of the partition it is responsible for
(and the token of the next node is the end token of the current tokens
partition)
Assume you have the following nodes/
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In each node of the ring has a unique Token which representing the node's
logical position in the cluster.
When you perform an operation on a row is calculated a token based on this row
... the node-token "closest" to the row-token will store the data (and also the
RF-1 remaining nodes) -- thi
Hi!
Thank you for your last reply. I'm still wondering if I got you right...
> ...
> A partitioner decides into which partition a piece of data belongs
Does your statement imply that the partitioner does not take any decisions at
all on the (physical) storage location? Or put another way: What
Hi,
i think everything is called a replica so if data is on 3 nodes you have 3
replicas. There is no such thing as an original.
A partitioner decides into which partition a piece of data belongs
A replica placement strategy decides which partition goes on which node
You cannot suppress the part
* Grab the system sstables from one of the 0.7 nodes and spin up a temp
1.0 machine them, then use the command.
Probably I'm still sleeping but I can't get what I want! :-(
I've copied the SSTables of a node to my own computer where I installed a
Cassandra 1.0 just for the purpose.
I
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