Hi,
I'm pretty new to Cassandra and am currently doing a proof of concept, and
thought it would be a good idea to ask if my data model is sane . . .
The data I have, and need to query, is reasonably simple. It consists of
about 10 million entities, each of which have a set of key/value
We put a bunch of effort into reducing GC pauses in 1.0, which worked
great on our synthetic benchmarks but I don't have much data on how
well that's working in practice, on real-world workloads.
If you're running a Cassandra app in production or testing, I'd
appreciate it if you could send me
Sounds like you need to increase sysctl vm.max_map_count
On Fri, Feb 3, 2012 at 7:27 PM, Ajeet Grewal asgre...@gmail.com wrote:
Hey guys,
I am getting an out of memory (mmap failed) error with Cassandra
1.0.2. The relevant log lines are pasted at
http://pastebin.com/UM28ZC1g.
Cassandra
Thanks Andrey and Chris. It sounds like we don't necessarily have to use
composite columns. From what I understand about dynamic CF, each row may
have completely different data from other rows; but in our case, the data
in each row is similar to other rows; my concern was more about the
I also made something like this a while ago. I decided to go for the
2-rows-solution: by doing that you don't have the need for super columns.
Cassandra is really good at reading, so this should not be an issue.
Cheers!
2012/2/4 Yiming Sun yiming@gmail.com
Thanks Andrey and Chris. It
Interesting idea, R.V. But what did you do with the row keys?
On Sat, Feb 4, 2012 at 2:29 PM, R. Verlangen ro...@us2.nl wrote:
I also made something like this a while ago. I decided to go for the
2-rows-solution: by doing that you don't have the need for super columns.
Cassandra is really
On 02/04/2012 12:05 PM, Andrea Loggia wrote:
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Il giorno sabato 4 febbraio 2012, alle ore 23.17, Mr.Quintero ha scritto:
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I just kept both row keys the same. This was very trivial for fetching them
both. When you have A, you can fetch B, and vice versa.
2012/2/4 Yiming Sun yiming@gmail.com
Interesting idea, R.V. But what did you do with the row keys?
On Sat, Feb 4, 2012 at 2:29 PM, R. Verlangen
I've used special values which still comply with the Composite
schema for the metadata columns, e.g. a column of
1970-01-01:{accountId} for a metadata column where the Composite is
DateType:UTF8Type.
Jim
On Sat, Feb 4, 2012 at 2:13 PM, Yiming Sun yiming@gmail.com wrote:
Thanks Andrey and
R.V., I am a little confused. I was under the impression that you cannot
have two rows with the same key - unless you were referring to two
different CFs?
On Sat, Feb 4, 2012 at 6:11 PM, R. Verlangen ro...@us2.nl wrote:
I just kept both row keys the same. This was very trivial for fetching
Interesting idea, Jim. Is there a reason you don't you use
metadata:{accountId} instead? For performance reasons?
On Sat, Feb 4, 2012 at 6:24 PM, Jim Ancona j...@anconafamily.com wrote:
I've used special values which still comply with the Composite
schema for the metadata columns, e.g. a
On Sat, Feb 4, 2012 at 4:17 PM, Mr.Quintero quinteros8...@gmail.com wrote:
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