Kurt,
I cloned the original ticket. The new one is:
https://issues.apache.org/jira/browse/CASSANDRA-14691
I can’t change the Assignee resp. unassign it.
Thanks,
Thomas
From: kurt greaves
Sent: Dienstag, 14. August 2018 04:53
To: User
Subject: Re: Data Corruption due to multiple Cassandra 2.1
Hi all ,
Me new to Cassandra , i was asked to migrate data from Oracle to Cassandra.
Please help me giving your valuable guidance.
1) Can it be done using open source Cassandra.
2) Where should I start data model from?
3) I should use java, what kind of jar/libs/tools I need use ?
4) How I decide
> Hi all ,
> Me new to Cassandra , i was asked to migrate data from Oracle to Cassandra.
> Please help me giving your valuable guidance.
> 1) Can it be done using open source Cassandra.
> 2) Where should I start data model from?
> 3) I should use java, what kind of jar/libs/tools I need use ?
> 4)
3 starting points:
- DO NOT migrate your tables as they are in Oracle to Cassandra. In
most cases, you need a different model for Cassandra
- DO take the (free) DataStax Academy courses to learn much more about
Cassandra as you dive in. It is a systematic and bite-size approac
All of Sean's points are good, a few more:
- Apache Cassandra (free, open source, official) is usually sufficient. DSE
may be faster, but really it's about whether or not you're willing to pay
for support. If you're trying to stop paying Oracle, I suspect you'd
probably not want to start paying so
The biggest issue you’ll have is that “migration” from a relational to
Cassandra is not a 1 to 1. The schemas will have to change.
DSE has other technology that is a little more useful - such as Spark / Spark
SQL / Solr that is built in which helps meet the needs which Oracle was
previously pro
Look here for some “migration” or data modeling articles.
https://anant.github.io/awesome-cassandra/
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Sep 5,
Thank you all very much.
Migration is due to Oracle not scaling as expected.
Sure I will be posting my queries and doubts time to time for your guidance.
Thank you.
Shyam
On Wed, 5 Sep 2018, 21:28 Rahul Singh, wrote:
> Look here for some “migration” or data modeling articles.
>
> *https://ana
Hi all,
Sir how should I keep track of the data which is moved to Cassandra , what
are the best strategies available?
Regards,
Shyam
On Wed, 5 Sep 2018, 18:51 sha p, wrote:
>
> Hi all ,
>> Me new to Cassandra , i was asked to migrate data from Oracle to
>> Cassandra.
>> Please help me giving yo
It very much depends on your application. You'll PROBABLY want to double
write for some period of time - start writes to both Cassandra and Oracle,
and then ensure they're both in sync. Once you're sure they're both in
sync, move your reads from Oracle to Cassandra.
On Wed, Sep 5, 2018 at 8:58
Hi Shyam,
Those are big questions! The book *Cassandra: The Definitive Guide *is a
good place to start, it will walk you through a little bit of each of those
questions. It should be a challenging project. Look around at
http://cassandra.apache.org/ and Datastax has some good tutorials and
video
Cassandra Community,
For those of you who don't follow the dev@ list, the Cassandra developers
have frozen trunk for 4.0 (
https://lists.apache.org/thread.html/18c76129a4fe6785a51dad7500e04ee13a407a7f7ac5c8f9a3d83c87@%3Cdev.cassandra.apache.org%3E
and
https://lists.apache.org/thread.html/494c3ced9
Hi all,
What would be the best way to migrate from DSE to Apache C*
1.) It is ok to add Apache C * DC in DSE cluster and once data is
replicated and repaired decommission DSE DC ??
2.) Does SStable loader wrk to migrate data between DSE to Apache C*
3.) Do we need to write an app or sarl job to
Hello,
is it a known issue / limitation that cleanup compactions aren't counted in the
compaction remaining time?
nodetool compactionstats -H
pending tasks: 1
compaction type keyspace table completed totalunit
progress
CleanupXXX YYY
Probably worth a JIRA (especially if you can repro in 3.0 or higher, since
2.1 is critical fixes only)
On Wed, Sep 5, 2018 at 10:46 PM Steinmaurer, Thomas <
thomas.steinmau...@dynatrace.com> wrote:
> Hello,
>
>
>
> is it a known issue / limitation that cleanup compactions aren’t counted
> in the
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