Hi,
I am using JanusGraph along with Cassandra as the backend. I have created a
graph using JanusGraphFactory.open() method. I want to create one more
graph and traverse it. Can you please help me.
Regards,
Vinayak
Hi Stefan,
Hi John,
thanks for your answers, this helps me a lot.
@John: you are right, EJB does not bring any advantage in this case. I
will change my classes to simple CDI.
I will write a short blog about this solution after I finished.
Best regards
Ralph
On 12.06.19 07:58, Stefan
And once the cluster token map formation is done, it starts bootstrap and
we get a ton of these:
WARN [MessagingService-Incoming-/2406:da14:95b:4503:910e:23fd:dafa:9983]
2019-06-12 15:22:04,760 IncomingTcpConnection.java:100 -
UnknownColumnFamilyException reading from socket; closing
We only were able to scale out four nodes and then failures started
occurring, including multiple instances of nodes joining a cluster without
streaming.
Sigh.
On Tue, Jun 11, 2019 at 3:11 PM Carl Mueller
wrote:
> We had a three-DC (asia-tokyo/europe/us) cassandra 2.2.13 cluster, AWS,
> IPV6
>
One node at a time: yes that is what we are doing
We have not tried the streaming_socket_timeout_in_ms. It is currently 24
hours. (```streaming_socket_timeout_in_ms=8640```) which would cover
the bootstrap timeframe we have seen before (1-2 hours per node)
Since it joins with no data, it is
Is it correct to say that a lost node cannot be restored from backup? You must
either replace the node or evict/re-add (i.e., rebuild from other nodes).
Also, that snapshot, incremental, commitlog backups are relegated to
application keyspace recovery only?
How about recovery of the entire
We're getting
DEBUG [GossipStage:1] 2019-06-12 15:20:07,797 MigrationManager.java:96 -
Not pulling schema because versions match or shouldPullSchemaFrom returned
false
multiple times, as it contacts the nodes.
On Wed, Jun 12, 2019 at 11:35 AM Carl Mueller
wrote:
> We only were able to scale
Adding one node at a time – is that successful?
Check value of streaming_socket_timeout_in_ms parameter in cassandra.yaml and
increase if needed.
Have you tried Nodetool bootstrap resume & jvm option i.e. JVM_OPTS="$JVM_OPTS
-Dcassandra.consistent.rangemovement=false" ?
From: Carl Mueller
If I lose a node, does it make sense to even restore from
snapshot/incrementals/commitlogs?
Or is the best way to do an evict/re-add?
Thanks,
Alan.
NOTICE: This communication is intended only for the person or entity to whom it
is addressed and may contain confidential, proprietary, and/or
To avoid violating consistency guarantees, you have to repair the replicas
while the lost node is down
Once you do that it’s typically easiest to bootstrap a replacement (there’s a
property named “replace address first boot” you can google or someone can link)
that tells a new joining host to
I guess I’m considering this scenario:
· host and configuration have survived
· /data is gone
· /backups have survived
I have tested recovering from this scenario with an evict/re-add, which worked
fine.
If I restore from backup, the node will be behind the cluster –
Dear Apache Enthusiast,
(You’re receiving this message because you’re subscribed to one or more
Apache Software Foundation project user mailing lists.)
We’re thrilled to announce the schedule for our upcoming conference,
ApacheCon North America 2019, in Las Vegas, Nevada. See it now at
A host can replace itself using the method I described
> On Jun 12, 2019, at 7:10 AM, Alan Gano wrote:
>
> I guess I’m considering this scenario:
> · host and configuration have survived
> · /data is gone
> · /backups have survived
>
> I have tested recovering from
I’m not sure it is correct to say, “you cannot.” However, that is a more
complicated restore and more likely to lead to inconsistent data and take
longer to do. You are basically trying to start from a backup point and roll
everything forward and catch up to current.
Replacing/re-streaming is
100% agree with Sean. I would only use Cassandra backups in a case where
you need to restore from full cluster loss. Example: An entire DC burns
down, tornado, flooding.
Your routine node replacement after a failure should be
replace_address_first_boot.
To ensure this goes smoothly, run
Hi,
I am trying to run a repair for first time a specific column family in specific
keyspace and it seems that is going super slow.
I have 6 nodes cluster with 2 Datacenters (RF 2) and the repair is a non
incremental, DC parallel one. This column family is around 4 TB and it is
written
I posted a bug, cassandra-15155 :
https://issues.apache.org/jira/browse/CASSANDRA-15155?jql=project%20%3D%20CASSANDRA
It seems VERY similar to
https://issues.apache.org/jira/browse/CASSANDRA-6648
On Wed, Jun 12, 2019 at 12:14 PM Carl Mueller
wrote:
> And once the cluster token map formation is
Hello,
I have a Cassandra cluster running with 2.1.16 version of Cassandra, where
I have decommissioned few nodes from the cluster using "nodetool
decommission", but I see the node IPs in UNREACHABLE state in "nodetool
describecluster" output. I believe they appear only for 72 hours, but in
my
Few queries:
1. What is the cassandra version ?
2. is the size of table 4TB per node ?
3. What is the value of compaction_throughput_mb_per_sec and
stream_throughput_outbound_megabits_per_sec ?
On Thu, Jun 13, 2019 at 5:06 AM R. T.
wrote:
> Hi,
>
> I am trying to run a repair for first time a
19 matches
Mail list logo
