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From "Sibbald, Charles" <>
Subject Re: Store data with cassandra
Date Fri, 20 Mar 2015 16:07:33 GMT
Sounds like this is a job for jackrabbit ?

From: Ali Akhtar <<>>
Reply-To: "<>" <<>>
Date: Friday, 20 March 2015 15:58
To: "<>" <<>>
Subject: Re: Store data with cassandra

( I apologize, I'm only joking. To answer your question, Cassandra tends to cache the first
300MB or so of data in memory, only when it grows beyond that does it start to write it to
files. But, Cassandra is not the write choice for storing files. In the screenshot you linked,
its only storing the filenames, not the actual contents of the files).

On Fri, Mar 20, 2015 at 8:54 PM, Ali Akhtar <<>>
It has been decided that the file cannot be allowed to be stored, sorry. However, if a sacrifice
to the gods is prepared, it may be possible to change things.

On Fri, Mar 20, 2015 at 8:49 PM, jean paul <<>>
i'd like to store MyFile.txt using cassandra (replicat = 2) and see on what node the file
and its replicas  are stored on my cluster of 10 nodes
it is a simple file with simple content (text)

is that possible ?

2015-03-20 16:44 GMT+01:00 Ali Akhtar <<>>:
The files you store have to personally be vetted by the cassandra community. Only if they're
found to not contain anything inappropriate, does cassandra let you store them. (A 3/4 majority
vote is necessary).

Please send your files for approval to<>

On Fri, Mar 20, 2015 at 8:41 PM, jean paul <<>>
What about this so
i read also some documents about storing blob with cassandra !!

2015-03-20 15:04 GMT+01:00 Michael Dykman <<>>:
You seem to be missing the point here.

Cassandra does not manage files, it manages data in a highly distributed cluster.  If you
are attempting to manage files, you are quite simply using the wrong tool and Cassandra is
not for you.

On Fri, Mar 20, 2015 at 9:10 AM, jean paul <<>>
I have used this tutoriel to create my data base

/var/lib/cassandra/data# ls
demo  system  system_traces
:/var/lib/cassandra/data# cd demo/
:/var/lib/cassandra/data/demo# ls
:/var/lib/cassandra/data/demo# cd users/
:/var/lib/cassandra/data/demo/users# ls

i find nothing in /var/lib/cassandra/data/demo/users!

2015-03-20 13:06 GMT+01:00 jean paul <<>>:
Hello All;
i have created this table.

lastname | age | city          | email               | firstname ----------+-----+---------------+---------------------+-----------
      Doe |  36 | Beverly Hills |<> |   
  Jane     Byrne |  24 |     San Diego |<>
|       Rob     Smith |  46 |    Sacramento |<>
|      John

So, my question, where this data is saved ? in ./var/lib/cassandra/data ?

My end goal is to store afile with cassandra and to see on which node my file is stored ?

thanks a lot for help
Best Regards.

 - michael dykman

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