Thanks very much
-Original Message-
From: sc...@scode.org [mailto:sc...@scode.org] On Behalf Of Peter Schuller
Sent: Friday, January 14, 2011 4:40 PM
To: user@cassandra.apache.org
Subject: Re: about the data directory
as a administrator, I want to know why I can read the data from any
Not exactly. You mean one data will be put in four nodes which have 25%? If
does, how about two replica?
From: Viktor Jevdokimov [mailto:viktor.jevdoki...@adform.com]
Sent: Thursday, January 13, 2011 2:59 PM
To: user@cassandra.apache.org
Subject: RE: about the data directory
I have 4 nodes
I have 4 nodes, then I I create one keyspace (such as FOO) with replica
factor =1 and insert an data, why I can see the directory of
/var/lib/Cassandra/data/FOO in every nodes? As I know, I just have one replica
The schema (keyspaces and column families) are global across the
cluster
Subject: Re: about the data directory
I have 4 nodes, then I I create one keyspace (such as FOO) with replica
factor =1 and insert an data, why I can see the directory of
/var/lib/Cassandra/data/FOO in every nodes? As I know, I just have one replica
The schema (keyspaces and column families
I agree with you totally. but I want to know which node is the data kept? I
mean which way to know the actual data kept?
If you're just doing testing, you might 'nodetool flush' each host and
then look for the sstable being written. Prior to a flush, it's going
to sit in a memtable in memory
@cassandra.apache.org
Subject: Re: about the data directory
I agree with you totally. but I want to know which node is the data kept? I
mean which way to know the actual data kept?
If you're just doing testing, you might 'nodetool flush' each host and
then look for the sstable being written
So you mean just the replica node 's sstable will be changed ,right?
The data will only be written to the nodes that are part of the
replica set fo the row (with the exception of hinted handoff, but
that's a different sstable).
If all the replica node broke down, whether the users can read the
] On Behalf Of Peter Schuller
Sent: Friday, January 14, 2011 1:19 AM
To: user@cassandra.apache.org
Subject: Re: about the data directory
So you mean just the replica node 's sstable will be changed ,right?
The data will only be written to the nodes that are part of the
replica set fo the row
@cassandra.apache.org
Subject: Re: about the data directory
On Thu, Jan 13, 2011 at 7:56 PM, raoyixuan (Shandy)
raoyix...@huawei.com wrote:
I have some confused, why do the users can read the data in all nodes? I mean
the data just be kept in the replica, how to achieve it?
-Original Message-
From
I have 4 nodes, then I I create one keyspace (such as FOO) with replica
factor =1 and insert an data,
why I can see the directory of /var/lib/Cassandra/data/FOO in every nodes? As
I know, I just have one replica
So why do you have installed 4 nodes, not 1?
They're for your data to be
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