Hi Jason.
Moving from one node to two has exactly the same process as moving from 2
to 3 or any other +1 jump. Basically you configure the node and make it
join the ring and Cassandra will take care of assigning data and load to
that new node.
Regarding how much data your new node should have or
Hi,
Are there any links/resources which describe performance measurement (latency &
throughput) for a Cassandra Multi DC Active-Active setup across a WAN network
(20Gbps bandwidth) with 5 nodes in each DC.
Basically, I would like to know how to measure latency of writes when data is
replicat
I understand your point about the billing, but billing here was merely
the triggering factor that had me start analyzing the traffic in the first
place.
At the moment, I'm not considering the numbers on my bill anymore but
simply the numbers that I am measuring with iftop on each node of the
clust
Hi,
I just had a weird behaviour on one of our Cassandra nodes, which I would
like to share:
Short version:
My pending reads went up from ~0 to the hundreds when I reduced the
compactionthroughput from 16 to 2.
Long version:
One of our more powerful nodes had a few pending reads, while the oth
>
>
> Unfortunately, these numbers still don't match at all.
>
> And yes, the cluster is in a single DC and since I am using the EC2
> snitch, replicas are AZ aware.
>
>
Are repairs running on the cluster?
Other thoughts:
- is internode_compression set to 'all' in cassandra.yaml (should be 'all'
b
Thank you for your reply.
- Repairs are not running on the cluster, in fact we've been "slacking"
when it comes to repair, mainly because we never manually delete our data
as it's always TTLed and we haven't had major failures or outages that
required repairing data (I know that's not a good reaso
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Highlights:
* GemFire binding replaced with Apache Geode (incubating) binding
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* OrientDB binding improvements
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* Accumulo i
Hi,
I'm running a nodetool rebuild to include a new DC in my cluster.
My config is:
DC1, 2 nodes per rack (2 racks), 70gb each node
DC2, 2 nodes per rack (1 rack), 90gb each node
DC3, 2 nodes per rack (1 rack) (*THIS IS THE NEW DC*)
What I did was get the 2 nodes in DC3 up and running with bootst
Cassandra is streaming it at a near constant rate (if you had metrics for
network interface, you’d probably see that), but it doesn’t register in
nodetool status until it completes all of the sstables for a column family. At
that point, the -tmp–Data.db files get renamed to drop the –tmp, and th
Hi Jeff,
Thanks for the info, you're right!
Felipe Esteves
Tecnologia
felipe.este...@b2wdigital.com
Tel.: (21) 3504-7162 ramal 57162
2016-02-26 17:38 GMT-03:00 Jeff Jirsa :
> Cassandra is streaming it at a near constant rate (if you had metrics for
> network interface, you’d probably see th
Hi Chandra,
For write latency, etc. the tools are still largely the same set of tools
you'd use for single-DC- stuff like tracing, cfhistograms, cassandra-stress
come to mind. The exact results are going to differ based on your
consistency tuning (can you get away with LOCAL_QUORUM vs QUORUM?) and
Hi Jimmy,
If you sustain a long downtime, repair is almost always the way to go.
It seems like you're asking to what extent a cluster is able to
recover/resync a downed peer.
A peer will not attempt to reacquire all the data it has missed while being
down. Recovery happens in a few ways:
1) Hin
We just upgraded our cluster to version 3.3 and I am not able to run select or
delete statements using partial partition keys in where clause.
It asks me to provide all the partition keys.
But I have only partial partition key info (1 out of two columns) when running
a select.
Is there any wor
You wouldn't be able to do that query with that schema in any version of
Cassandra. Here's the output from 2.1:
cqlsh> create KEYSPACE test WITH replication = {'class': 'SimpleStrategy',
'replication_factor': 1};
cqlsh> use test;
cqlsh:test> create table if not exists persistent_map (
...
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