I'm looking for a deeper understanding of how Cassandra interacts with the
system_auth keyspace to authenticate/authorize users.
Here is what I have pieced together. Please let me know if I am on the
right track.
A user attempts to connect to Cassandra. Cassandra checks against
system_auth for th
I
find it helpful to read the manual first. After review, I would be happy
to answer specific questions.
https://docs.datastax.com/en/cassandra/2.1/cassandra/tools/toolsRepair.html
*...*
*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872*
On Mon, Mar 13, 2017 at
I'm trying to change compaction strategy one node at a time. I'm using
jmxterm like this:
`echo 'set -b
org.apache.cassandra.db:type=ColumnFamilies,keyspace=my_ks,columnfamily=my_cf
CompactionParametersJson
\{"class":"TimeWindowCompactionStrategy","compaction_window_unit":"HOURS","compaction_windo
I understand that the nodetool command connects to a specific server and for
many of the commands, e.g. "info", "compactionstats", etc, the information is
for that specific node.
While for some other commands like "status", the info is for the whole cluster.
So is "nodetool repair" that operates
How about this tool?
https://github.com/instaclustr/cassandra-sstable-tools
> On 13 Mar 2017, at 17:56, Artur R wrote:
>
> Hello!
>
> I can't find where C* stores information about partitions size (if stores it
> at all).
> So, the questions;
>
> 1. How to obtain the size (in rows or in byt
It's possible that you're hitting
https://issues.apache.org/jira/browse/CASSANDRA-13009 .
In (simplified) summary, the read query picks the right number of endpoints
fairly early in its execution. Because the down node has not been detected
as down yet, it may be one of the nodes. When this node d
Hello!
I can't find where C* stores information about partitions size (if stores
it at all).
So, the questions;
1. How to obtain the size (in rows or in bytes - doesn't matter) of some
particular partition?
I know that there is *system.size_estimates* table with
*mean_partition_size*, but it's o
Just some more info, I've tried the same scenario on 2.0.14 and 2.1.15 and
didn't encounter such errors.
What I did find is that the timeout errors appear only until the node is
discovered as "DN" in nodetool status. Once the node is in DN status, the
errors stop and the data is retrieved.
Could t
> there are some nasty edge cases when you mix incremental repair and full
repair ( https://issues.apache.org/jira/browse/CASSANDRA-13153 )
mixing incremental and full repairs will just make that more likely to
happen, but although unlikely it's still possible for a similar condition
to happen eve
I'm reading the types in Cassandra, and I would like to use dates, The
documentations say that I can save the time as String with the following format:
https://docs.datastax.com/en/cql/3.3/cql/cql_reference/cql_data_types_c.html
So:
CREATE KEYSPACE IF NOT EXISTS newKeySpace WITH
On Mon, Mar 13, 2017 at 12:17 AM, benjamin roth wrote:
> @Dor,Jeff:
>
> I think Jeff pointed out an important fact: You cannot stop CS, swap
> binaries and start Scylla. To be honest that was AFAIR the only "Oooh :(" I
> had when reading the Scylla "marketing material".
>
If you're on 2.1.x you
Hi,
We did indeed consider support for a mixed cluster, but in the end
decided against it, for many reasons:
- the internode protocol is underdocumented and keeps changing, so it
would be hard to support it, and hard to test it
- it would limit the kind of optimizations we can do by redu
We came to the thread to provide technical answers about whether the
difference in performance arise from
C++ only or beyond. When the discussion included numa, we even dove deep
into the weeds. I think we provided enough answers and I respect all of the
opinions here and thus if someone has furthe
@Dor,Jeff:
I think Jeff pointed out an important fact: You cannot stop CS, swap
binaries and start Scylla. To be honest that was AFAIR the only "Oooh :(" I
had when reading the Scylla "marketing material".
If that worked it would be very valuable from both Scylla's and a users'
point of view. As
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