Here are some notes from the DataStax Enterprise Best Practices White Paper:
Upgrading from DataStax Community (DSC) or Apache Cassandra to DSE is just like
upgrading
from one version to another. Before upgrading to DSE, DataStax recommends
upgrading to the
version of Cassandra contained in th
Thanks Robert.
On Fri, Jun 27, 2014 at 2:21 PM, Robert Coli wrote:
> On Fri, Jun 27, 2014 at 10:57 AM, Pavel Kogan
> wrote:
>
>> So basically when I rename all files during merge of keyspaces, I will
>> substitute dest keyspace, column family is the same cause it is same
>> scheme, and I will
We tried using HAProxy (to force connections to the closest datacenter)
instead of relying on Hector to do the right thing and had problems with
it. The client libraries we have used are smart enough to handle the node
up/down case, and in most scenarios, if there is a slow node, they will
route ar
I have our application code deployed in two data centers, DC1 and DC2 and
Cassandra nodes are also in DC1 and DC2 making a single cluster.
Our application servers in DC1 are communicating to DC1 Cassandra nodes
which I verified with "netstat -a | grep 9042"
But somehow internally DC1 Cassandra n
On Fri, Jun 27, 2014 at 10:57 AM, Pavel Kogan
wrote:
> So basically when I rename all files during merge of keyspaces, I will
> substitute dest keyspace, column family is the same cause it is same
> scheme, and I will chose arbitrary number just to avoid collision, correct?
> What is the range? I
Thanks Robert.
When I look at column families files it seems like the format is:
[keyspace]-[cf]-jb-[number]-CompressionInfo.db
[keyspace]-[cf]-jb-[number]-Data.db
[keyspace]-[cf]-jb-[number]-Filter.db
[keyspace]-[cf]-jb-[number]-Index.db
[keyspace]-[cf]-jb-[number]-Statistics.db
[keyspace]-[cf]-
I think you are going to be creating problems that the drivers were designed
to avoid, it is not a good idea in general.
/je
On Jun 27, 2014, at 11:28 AM, Serge Fonville wrote:
> Hector is same way, if any node is slow to responds, times out or dies hector
> will remove it from the pool leavin
On Fri, Jun 27, 2014 at 8:28 AM, Pavel Kogan
wrote:
> I want to merge one keyspace (A) data into another (B) with exactly same
> scheme. The partition keys of all records are unique in both keyspaces. Can
> I just copy all files under keyspace A column families into keyspace B
> column families f
>
> Hector is same way, if any node is slow to responds, times out or dies
> hector will remove it from the pool leaving making it look like cluster
> dead. The entire fault tolerant part of cassandra would be lost.
Does this still apply if all nodes contain all data?
Kind regards/met vriendelijk
Hector is same way, if any node is slow to responds, times out or dies hector
will remove it from the pool leaving making it look like cluster dead. The
entire fault tolerant part of cassandra would be lost.
Chris
On Jun 27, 2014, at 11:00 AM, Michael Dykman wrote:
> NO, really it can't. I k
NO, really it can't. I know little of Hector, but when using the
datastax driver, Cassandra provides a highly available set of
connections; a single Cassandra session will have explicit connections
to all of the node which make up a given cluster.
The Cassandra server itself relies on a lot of cr
Hi all,
I want to merge one keyspace (A) data into another (B) with exactly same
scheme. The partition keys of all records are unique in both keyspaces. Can
I just copy all files under keyspace A column families into keyspace B
column families folders, after running nodetool flush? Is filenames
co
Hi Jack
Thanks for the reply .
I am looking to migrate from raw Cassandra to the DSE enterprise ?
i) is migrating as simple as downloading the DSE binaries and a restart maybe
ii) any configurations that I need to modify in yaml
iii) I am on raw version 1.25. Do I need to get this to a particu
Are you asking how to do a fresh DSE install, or how to migrate from raw
Cassandra to DSE? Or, are you asking about DataStax Community Edition?
DataStax Enterprise:
http://www.datastax.com/download
DataStax Community Edition:
http://planetcassandra.org/cassandra/
AFAIK, there is no puppet suppo
Can a Cassandra client such as Hector operate successfully behind a HA
Proxy where the cluster is represented by a single IP Address?
Regards
Hi
How and where do we include these binaries in a apache cassandra installation .
I would like to include these in a puppet configuration.
Where was the 09_09 column inserted from? Are you sure whatever did the insert
is doing a local_quorum on the same DC the cli is in? It may return before all
the nodes get response back (ie 2 of the 3 in local DC) which report not having
the data. After all the nodes respond it will check the
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