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From Nicolas Guyomar <nicolas.guyo...@gmail.com>
Subject Re: Looking for advice and assistance upgrading from Cassandra 1.2.9
Date Wed, 18 Oct 2017 07:21:08 GMT
Hi David,

Last time I did such an upgrade, I got stuck in 2.1.x because of OpsCenter
5.2 :
http://docs.datastax.com/en/landing_page/doc/landing_page/compatibility.html#compatibility__opsc-compatibility
.
This might have change since, but I do not think C* 2.2 will work with
OpsCenter 5.2

If you are in the process of updating your cluster toward the v3 (or even
better wait for v4 to be stable) in a near future, I'd recommend getting
rid of OpsCenter to begin with, and build a monitoring stack that would
enable you to keep a close eye on your cluster during this while migration
(or use a saas monitoring like datadog etc )

Furthermore it wasn't necessary for me to migrate from thrift towards CQL,
but that was kind of a mistake because I wasn't getting the full
performance improvement of v2 version thanks to CQL => if you can afford
it, and are using thrift right now => go for CQL ;)

Have fun I hope ;)

On 18 October 2017 at 00:26, kurt greaves <kurt@instaclustr.com> wrote:

> +1 what Jon said
>
> On 18 Oct. 2017 06:38, "Jon Haddad" <jon@jonhaddad.com> wrote:
>
>> I recommend going all the way to 2.2.
>>
>> On Oct 17, 2017, at 12:37 PM, Jeff Jirsa <jjirsa@gmail.com> wrote:
>>
>> You’ll go from 1.2 to 2.0 to 2.1 - should be basic steps:
>> - make sure you have all 1.2 sstables by running upgradesstable
>> - one node at a time, swap the 1.2 binaries for latest in 2.0
>> - once all nodes are 2.0, run upgradesstables on each node (one at a time)
>> - one node at a, swap the 2.0 binaries for latest 2.1
>> - once all are 2.1, upgradesstables again
>>
>> You’ll want to read NEWS.txt for the versions as you upgrade in case
>> there are any changes to config yaml or intermediate steps -
>> https://github.com/apache/cassandra/blob/cassandra-1.2/NEWS.txt for 1.2
>>
>> Not a bad idea to find a consultant that does this often because they may
>> know of some rough edges in the process - this isn’t an endorsement, but I
>> imagine the folks at Pythian do this a lot, and Instaclustr / TheLastPickle
>> both have teams of consultants to help you along as well.
>>
>>
>>
>> On Oct 17, 2017, at 11:20 AM, David Ellis <david@ellisonline.ca> wrote:
>>
>> I have a large Cassandra 1.2.9 based enterprise application with a
>> considerable amount of data.
>>
>> I’d like to begin the process of upgrading my existing java application
>> and the database to Cassandra 2.1.
>>
>> Anyone have some suggestions where to begin? Any experts looking for some
>> consulting income :)
>>
>> David
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>>
>>

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