“Is cassandra only for use cases with data load > 100TB and massive user
counts?”
I wouldn’t make that extreme a statement! There are plenty of more moderate use
cases for Cassandra. For example, a dozen nodes with 300 GB per node for just a
few million users and their interactions and transact
I've seen a lot of deployments, and I think you captured the scenarios and
reasoning quite well. You can apply other nuances and details to #2 (e.g.
segment based on SLA or topology), but I agree with all of your reasoning.
-Tupshin
-Global Field Strategy
-Datastax
On Jul 8, 2014 10:54 AM, "Jeremy
I've used various databases in production for over 10 years. Each has
strengths and weaknesses.
I ran Cassandra for just shy of 2 years in production as part of both
development teams and operations, and I only hit 1 serious problem
that Rob mentioned. Ideally C* would have guarded against it, b
On Fri, Jul 4, 2014 at 2:10 PM, DuyHai Doan wrote:
> c. operational simplicity due to master-less architecture. This feature
> is, although quite transparent for developers, is a key selling point.
> Having suffered when installing manually a Hadoop cluster, I happen to love
> the deployment sim
On Tue, Jul 8, 2014 at 5:31 AM, Bryon Spahn wrote:
> FSReadError in /mnt/data/cassandra/COMPANY/crmFieldInfo/COMPANYFieldInfo-
> jb-710-Data.db
>
>
FSReadError seems relatively likely to be a problem on the underlying
filesystem, though I don't have a sec right now to grep and check.
> 08 05:00
Ah.. I think that's what I was hoping for!
On Tue, Jul 8, 2014 at 9:05 AM, DuyHai Doan wrote:
> If you are using CQL3, the meta data are stored in system tables
>
>
> On Tue, Jul 8, 2014 at 5:38 PM, Kevin Burton wrote:
>
>> Are there any easy/elegant ways to compare dev schema to production
>>
Do you prefer purpose-specific Cassandra clusters that support a single
application's data set, or a single Cassandra cluster that contains column
families for many applications? I realize there is no ideal answer for
every situation, but what have your experiences been in this area for
cluster pla
Thanks Mark. Yes the 1024 is the limit. I haven't changed it as per the
recommended production settings.
But I am wondering why does Cassandra need to keep 3000+ commit log segment
files open?
Regards,
Bhaskar
On Tuesday, 8 July 2014 1:50 PM, Mark Reddy wrote:
Hi Bhaskar,
Can you check
If you are using CQL3, the meta data are stored in system tables
On Tue, Jul 8, 2014 at 5:38 PM, Kevin Burton wrote:
> Are there any easy/elegant ways to compare dev schema to production
> schema. I want to find if there are any rows/columns we need to add.
>
> I could try to format the output
I'd suggest looking at the system keyspace. Like schema_columns
On Jul 8, 2014 9:39 AM, "Kevin Burton" wrote:
> Are there any easy/elegant ways to compare dev schema to production
> schema. I want to find if there are any rows/columns we need to add.
>
> I could try to format the output and just
Are there any easy/elegant ways to compare dev schema to production schema.
I want to find if there are any rows/columns we need to add.
I could try to format the output and just use 'diff' … but with the table
options that isn't super clean either.
--
Founder/CEO Spinn3r.com
Location: *San
Hi All,
When i query the cassandra, it creates a cartesion produt on my input
request (row keys * column keys). Is there any way to query cassandra with
map kind of input as below.
current scenarios
5 row keys, 5 column keys as below = result data with 25 (if data is
available).
example
rowkey
Robert,
New development today:
FSReadError in
/mnt/data/cassandra/COMPANY/crmFieldInfo/COMPANYFieldInfo-jb-710-Data.db
at
org.apache.cassandra.io.compress.CompressedRandomAccessReader.reBuffer(CompressedRandomAccessReader.java:95)
at
org.apache.cassandra.io.compress.Compress
Hi Bhaskar,
Can you check your limits using 'ulimit -a'? The default is 1024, which
needs to be increased if you have not done so already.
Here you will find a list of recommended production settings:
http://www.datastax.com/documentation/cassandra/2.0/cassandra/install/installRecommendSettings.h
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