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From "Jens Rantil" <>
Subject Re: Cassandra use cases/Strengths/Weakness
Date Fri, 04 Jul 2014 19:45:03 GMT

I think you are asking the wrong first question. You should start with "What are my requirements?".
If you are only storing two items that are rarely ever modified, any database is a good approach.
We have no idea what your use case is. We could speculate about it, but really it all boils
down to one or multiple applications.

Don't use a hammer if don't know what to use it for.

As to your CTO, your answer to use database X should be "because it fits our requirements".
Simple as that.

My five cents,

Sent from Mailbox

On Fri, Jul 4, 2014 at 9:31 PM, Prem Yadav <> wrote:

> Thanks Manoj. Great post for those who already have Cassandra in production.
> However it brings me back to my original post.
> All the points you have mentioned apply to any big data technology.
> Storage- All of them
> Query- All of them. In fact lot of them perform better. Agree that CQL
> structure is better. But hive,mongo all good
> Availability- many of them
> So my question is basically to Cassandra support people e.g.- Datastax Or
> the developers.
> What makes Cassandra special.
> If I have to convince my CTO to spend million dollars on a cluster and
> support, his first question would be why Cassandra? Why not this or that?
> So I still am not sure about what special Cassandra brings to the table?
> Sorry about the rant. But in the enterprise world, decisions are taken
> based on taking into account the stability, convincing managers and what
> not. Chosen technology has to be stable for years. People should be
> convinced that the engineers are not going to do a lot of firefighting.
> Any inputs appreciated.
> On Fri, Jul 4, 2014 at 7:07 PM, Manoj Khangaonkar <>
> wrote:
>> These are my personal opinions based on few months using Cassandra. These
>> are my views. Others
>> may have different opinion
>> regards
>> On Fri, Jul 4, 2014 at 7:37 AM, Prem Yadav <> wrote:
>>> Hi,
>>> I have seen this in a lot of replies that Cassandra is not designed for
>>> this and that. I don't want to sound rude, i just need some info about this
>>> so that i can compare it to technologies like hbase, mongo, elasticsearch, solr,
>>> etc.
>>> 1) what is Cassandra designed for. Heave writes yes. So is Hbase. Or
>>> ElasticSearch
>>> What is the use case(s) that suit Cassandra.
>>> 2) What kind of queries are best suited for Cassandra.
>>> I ask this Because I have seen people asking about queries and getting
>>> replies that its not suited for Cassandra. For ex: queries where large
>>> number of rows are requested and timeout happens. Or range queries or
>>> aggregate queries.
>>> 3) Where does Cassandra excel compared to other technologies?
>>> I have been working on Casandra for some time. I know how it works and I
>>> like it very much.
>>> We are moving towards building a big cluster. But at this point, I am not
>>> sure if its a right decision.
>>> A lot of people including me like Cassandra in my company. But it has
>>> more to do with the CQL and not the internals or the use cases. Until now,
>>> there have been small PoCs and people enjoyed it. But a large scale
>>> project, we are not so sure.
>>> Please guide us.
>>> Please note that the drawbacks of other technologies do not interest me,
>>> its the strengths/weaknesses of Cassandra I am interested in.
>>> Thanks
>> --
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