Hi,
I am using counter tables in Cassandra and I want to understand how the
concurrent updates to counter table are handled in Cassandra.
There are more than one threads who are responsible for updating the
counter for a partition key. Multiple threads can also update the counter
for the same
Hello,
Does sstableloader works between datastax and Apache cassandra. I'm trying
to migrate dse 5.0.7 to Apache 3.11.1 ?
Thank you Alain.
Nodetool describecluster shows some nodes unreachable, different output from
each node.
Node1 can see all 4 nodes up.
Node 2 says node 4 and node 5 unreachable
Node 3 complains about node node 2 and node 1
Nodetool status shows all nodes up and read writes are working for most
Hello Nitan,
1. Can sstable corruption in application tables cause schema mismatch?
>
I would say it should not. I could imagine in the case that the corrupted
table hits some 'system' keyspace sstable. If not I don' see how corrupted
data can impact the schema on the node.
> 2. Do we need to
Hi,
Two questions:
1. Can sstable corruption in application tables cause schema mismatch?
2. Do we need to disable repair while adding storage while Cassandra is down?
Regards,
Nitan
Cell: 510 449 9629
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This may sound a bit harsh, but I teach my developers that if they are trying
to use ALLOW FILTERING – they are doing it wrong! We often choose Cassandra for
its high availability and scalability characteristics. We love no downtime.
ALLOW FILTERING is breaking the rules of availability and
This is a stretch, but are you using authentication and/or authorization? In my
understanding the queries executed for you to do the authentication and/or
authorization are usually done at LOCAL_ONE (or QUORUM for cassandra user), but
maybe there is something that is changed in the security
Hello,
I have struggled with the following problem for last a couple of days. First of
all I am using cqlsh 5.0.1 ,Cassandra 3.11.1 and CQL spec 3.4.4.
What I am trying to do is creating a materialized view, named income_periods
from a table named income. The problem is, i am able to create
Hi Shalom,
Thanks for your notes! So you also experienced this thing... fine
Then maybe the best rules to follow are these:
a) never(!) run a query "ALLOW FILTERING" on a Production cluster
b) if you need these queries build a test cluster (somehow) and mirror
the data (somehow) OR add
Hi Attila,
I'm definitely no guru, but I've experienced several cases where people at
my company used allow filtering and caused major performance issues.
As data size increases, the impact will be stronger. If you have large
partitions, performance will decrease.
GC can be affected. And if GC
Hi Gurus,
Looks we stopped this thread. However I would be very much curious
answers regarding b) ...
Anyone any comments on that?
I do see this as a potential production outage risk now... Especially as
we are planning to run analysis queries by hand exactly like that over
the cluster...
Thanks for open-sourcing your work! Looks very promising.
/pelle
From: sebastien.allam...@orange.com
Sent: den 27 maj 2019 08:13
To: user@cassandra.apache.org; attila.wind@swf.technology
Subject: Re: CassKop : a Cassandra operator for Kubernetes developped by Orange
Hello Atilla,
The CassKop
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