Hi,
We are working with a two DCs Cassandra cluster (EU and US), so that the
distance is over 160 ms between them. I've added a new DC to this cluster,
modified the keyspace's replication factor and trying to rebalance it with
repair but the repair is very slow (over 10-15 minutes per node per
key
When you say you’re running repair to “rebalance” do you mean to populate
the new DC? If so, the normal/correct procedure is to use nodetool rebuild
rather than repair. See
https://docs.datastax.com/en/cassandra/2.1/cassandra/operations/ops_add_dc_to_cluster_t.html
for
the full details.
Cheers
Ben
Hi there,
Im running a java process on a 4 node cassandra 3.9 cluster on EC2 (instance
type t2.2xlarge), the process running separately on each of the nodes (i.e. 4
running JVMs).
The process is just doing reads from Cassandra and building a SOLR index and
using the java driver with consistency
LOCAL_ONE just means local to the datacenter by default the tokenaware
policy will go to a replica that owns that data (primary or any replica
depends on the driver) and that may or may not be the node the driver
process is running on.
So to put this more concretely if you have RF 2 with that 4 no
Jacob, seems you are on the right track however my understanding is that
only the user that was auth'd has their permissions/roles/creds cached.
Also. Cassandra will query at QUORUM for the "cassandra" user, and at
LOCAL_ONE for *all* other users. This is the same for creating users/roles.
>
> Here is what I have pieced together. Please let me know if I am on the
> right track.
You're more or less right regarding the built in
authenticator/authorizer/role manager (which are usually referred to as
"internal" as they store their data in Cassandra tables). One important
thing to note
The rogue pending task is likely a non-issue. If your jmx command went
through without errors and you got the log message you can assume it
worked. It won't show in the schema unless you run the ALTER statement
which affects the whole cluster.
If you were switching from STCS then you wouldn't expe
Thanks for reply. Much appreciated.
I should have included more detail. So I am using replication factor 2, and the
code is using a token aware method of distributing the work so that only data
that is primarily owned by the node is read on that local machine. So i guess
this points to the logi
Cassandra uses the IP address for more or less everything. It's possible to
change it through some hackery however probably not a great idea. The nodes
system tables will still reference the old IP which is likely your problem
here.
On 14 March 2017 at 18:58, George Sigletos wrote:
> To give a c
I don't see what getPolicy is retrieving but you want to use TokenAware
with the shuffle false option in the ctor, it defaults to shuffle true so
that load is spread when people have horribly fat partitions.
On Wed, Mar 15, 2017 at 9:41 AM, Frank Hughes
wrote:
> Thanks for reply. Much appreciate
I've actually changed the ip address quite a bit (gossip complains on
startup and happily picks up the new address), I think this maybe easier
such as..can those ip addresses route to one another ?
As in can the first node with 192.168.xx.xx hit the node with 10.179.xx.xx
on that interface?
On W
Thanks Ryan, appreciated again. getPolicy just had this:
Policy policy = new TokenAwarePolicy(DCAwareRoundRobinPolicy.builder().build());
so i guess i need
Policy policy = new TokenAwarePolicy(DCAwareRoundRobinPolicy.builder().build(),
false);
Frank
On 2017-03-15 13:45 (-), Ryan Svihla
On Tue, Mar 14, 2017 at 12:04 PM, daemeon reiydelle wrote:
> Am I unreasonable in expecting a poster to have looked at the documentation
> before posting? And that reposting the same query WITHOUT reading the
> documents (when pointed out to them) when asked to do so is not appropriate?
It may be
give it a try see how it behaves
On Mar 15, 2017 10:09 AM, "Frank Hughes" wrote:
> Thanks Ryan, appreciated again. getPolicy just had this:
>
> Policy policy = new TokenAwarePolicy(DCAwareRoundRobinPolicy.
> builder().build());
>
> so i guess i need
>
> Policy policy = new
> TokenAwarePolicy(DC
Thank you Eric for helping out.
The reason I sent the question a second time is because I did not see my
question and the first reply from the usergroup.
After I sent the question a second time, I got a personal flame from somebody
else too and so examined my "spam" folders and that's where I fou
This question came up today:
OK, say you mock, how do you construct a working multi-process
representation of how C* actually works from within a unit test without
running the code that actually constructs the cluster?
1) Don't do that (construct a multinode cluster in a test) just mock the
crap
+1. Would be awesome if this could be mocked / tested.
On Thu, Mar 16, 2017 at 3:47 AM, Edward Capriolo
wrote:
> This question came up today:
>
> OK, say you mock, how do you construct a working multi-process
> representation of how C* actually works from within a unit test without
> running the
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