Another Question on node density, in this scenario:
1. we should keep time series data of some years for a heavy write system in
Cassandra (> 10K Ops in seconds)
2. the system is insert only and inserted data would never be updated
3. in partition key, we used number of months since 1970, so da
Hey Kenneth,
I think it’s great that you’re working on improving the Cassandra
documentation. As a user, I thank you. This really is a pain point.
I have one suggestion: I feel like the process of improving that
documentation belongs on the dev mailing list, and the end-result belongs
on user. Th
Hello Akash,
Depends what you mean by downsampling: for example if you have time as
clustering key in your table you can order data DESC inside partitions and
then just do a select with per partition limit ( last 10 entries in each
partition for example).
But if you would like to extract a totally
These nine web pages on the Apache Cassandra web site have blank To Do
sections. Most of the web pages are completely blank. Mind you there is a
lot of hard work already done on the documentation. I'll make JIRA's for
any of the blank sections where there is not already a JIRA. Then it will
be
.
On Feb 21, 2018 1:29 PM, "Fred Habash" wrote:
> One node at a time
>
> On Feb 21, 2018 10:23 AM, "Carl Mueller"
> wrote:
>
>> What is your replication factor?
>> Single datacenter, three availability zones, is that right?
>> You removed one node at a time or three at once?
>>
>> On Wed, Feb
To the amazing people of DataStax,
The DataStax website is a little unwieldy as it tries to support open source
Cassandra and DataStax's version. Meanwhile some of that information would
help fill in the Apache Cassandra web site. If you would like to work on
this, I'm up for it.
Kennet
Hi Valentina,
In that case, are there any well defined ways on how to do downsampling of
data in C*?
thanks!
On Fri, Feb 23, 2018 at 11:36 AM, Valentina Crisan <
valentina.cri...@gmail.com> wrote:
> Hello,
>
> as far as I know it is not intended for MV's to have a different TTL than
> the base
Hello,
as far as I know it is not intended for MV's to have a different TTL than
the base tables. There was patch released at some point to not allow TTL
setting on MV (https://issues.apache.org/jira/browse/CASSANDRA-12868). MV's
should inherit the TTL of the base table.
Valentina
On Fri, Feb 23
It comes up from time to time. Rob Coli spent years arguing that this
behavior was confusing (
https://issues.apache.org/jira/browse/CASSANDRA-5836 ) , especially in the
"I'm replacing a failed seed" sense. It also comes up when you're adding
the first few hosts to a new DC (where they're new, but
Three quick and easy JIRA's to begin work on the documentation. I awake
your feedback.
https://issues.apache.org/jira/browse/CASSANDRA-14257
Add a separate Installing Cassandra section on the menu and move the content
there
https://issues.apache.org/jira/browse/CASSANDRA-14256
Renaming
In my opinion and experience, this isn’t a real problem, since you define a
list of seeds as the first few nodes you add to a cluster. When would you add
a node to an existing cluster and mark itself as a seed? It’s neither
practical or something you’d do by accident.
> On Feb 23, 2018, at
On Fri, Feb 23, 2018 at 10:12 AM, Oleksandr Shulgin <
oleksandr.shul...@zalando.de> wrote:
> On Fri, Feb 23, 2018 at 7:02 PM, Jeff Jirsa wrote:
>>
>> Yes, seeds don't bootstrap. But why? I don't think I ever seen a
>>> comprehensive explanation of this.
>>>
>>> The meaning of seed in the most c
On Fri, Feb 23, 2018 at 7:02 PM, Jeff Jirsa wrote:
>
> Yes, seeds don't bootstrap. But why? I don't think I ever seen a
>> comprehensive explanation of this.
>>
>> The meaning of seed in the most common sense is "connect to this host,
> and use it as the starting point for adding this node to th
On Thu, Feb 22, 2018 at 11:06 PM, Oleksandr Shulgin <
oleksandr.shul...@zalando.de> wrote:
> On Thu, Feb 22, 2018 at 5:42 PM, Jonathan Haddad
> wrote:
>
>> If it's a new cluster, there's no need to disable auto_bootstrap.
>>
>
> True.
>
>
>> That setting prevents the first node in the second DC f
A sincere thank you for everyone that replied. I will heavy lift the docs for
a while, do my Slender Cassandra reference project and then I’ll try to find
one or two areas where I can contribute code to get going on that.
I'll have a few JIRA's started by the end of the workday.
Kenneth Brot
Hi,
I had a couple of questions:
1. Can I create a materialized view on a table with a TTL longer than the
base table? For ex: my materialized view TTL is 1 month while my base table
TTL is 1 week.
2. In the above scenario, since the data in my base table would be gone
after a week, would it imp
Hi,
Check the value of "concurrent_materialized_view_writes" in the
cassandra.yaml file.
/Tommy
On 2018-02-23 12:11, Jonathan Baynes wrote:
Hi Community,
Can anyone give me some pointers where to look, or start to look for
where this issue is coming from?
On startup I get this in the l
I'm not sure, but from what I've seen in the Code, I would assume that
something is wrong with your config file (cassandra.yaml)
Maybe there is an earlier error/warning in your logs.
2018-02-23 12:11 GMT+01:00 Jonathan Baynes :
> Hi Community,
>
>
>
> Can anyone give me some pointers where to loo
Hi Community,
Can anyone give me some pointers where to look, or start to look for where this
issue is coming from?
On startup I get this in the logs and my service goes into a failed state.
Active(exited)
ERROR [main] 2018-02-23 09:56:36,267 CassandraDaemon.java:710 - Exception
encountered
A very interesting and detailed article, thank you DuyHai. I think this should
be part of general Cassandra documentation.
--
Jacques-Henri Berthemet
From: DuyHai Doan [mailto:doanduy...@gmail.com]
Sent: Thursday, February 22, 2018 7:04 PM
To: user
Subject: Re: Secondary Indexes C* 3.0
Read th
On Fri, Feb 23, 2018 at 8:32 AM, Oleksandr Shulgin <
oleksandr.shul...@zalando.de> wrote:
>
> This is important, because if you would like to use it on 3.0, it will not
> work unless you make sure that auto_boostrap is *not* set to false. This
> is not critical when creating DCs from scratch, but
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