Great! Thanks for these suggestions. I'll look into these tomorrow.
Tim
Sent from my iPhone
> On Nov 28, 2014, at 10:31 PM, Jason Wee wrote:
>
> There are two examples of hadoop with cassandra in the examples codes,
> https://github.com/apache/cassandra/tree/trunk/examples/hadoop_word_count
There are two examples of hadoop with cassandra in the examples codes,
https://github.com/apache/cassandra/tree/trunk/examples/hadoop_word_count
https://github.com/apache/cassandra/tree/trunk/examples/hadoop_cql3_word_count
Does these help?
Jason
On Sat, Nov 29, 2014 at 2:30 AM, Tim Dunphy wro
I should note that the young gen size is just a tuning suggestion, not directly
related to your problem at hand.
You might want to make sure you don’t have issues with key/row cache.
Also, I’m assuming that your extra load isn’t hitting tables that you wouldn’t
normally be hitting.
> On Nov 28
Your GC settings would be helpful, though you can see guesstimate by eyeballing
(assuming settings are the same across all 4 images)
Bursty load can be a big cause of old gen fragmentation (as small working set
objects tends to get spilled (promoted) along with memtable slabs which aren’t
flush
@Jens,
> will "inactive" CFs be released from C*'s memory after i.e. a few days
> or when under resource pressure?
No, certain memory structures are allocated and will remain resident on
each node for as long as the table exists.
> These CFs are used as "time buckets", but are to be kept for spe
The underlying write time is still tracked for each value in the collection
- it's part of how conflict resolution is managed - but it's not exposed
through CQL.
On Fri Nov 28 2014 at 4:18:47 AM Batranut Bogdan wrote:
> Hello all,
>
> If one has a table like this:
> id text,
> ts timestamp
> val
Hello,
This is a recurrent behavior of JVM GC in Cassandra that I never completely
understood: when a node is UP for many days (or even months), or receives a
very high load spike (3x-5x normal load), CMS GC pauses start becoming very
frequent and slow, causing periodic timeouts in Cassandra. Tryi
Hey all,
I have a 3 node Cassandra cluster I would like to hook into hadoop for
processing the information in the Cassandra DB. I know that Datastax
version of Cassandra includes support for Hadoop right out of the box. But
I've been googling around and I don't see any good information on how to
I would suggest that dynamic table creation is, in general, not a great idea,
regardless of the database. I would seriously consider altering your approach
to use a fixed set of tables.
On Nov 28, 2014, at 1:53 AM, Marcus Olsson
mailto:marcus.ols...@ericsson.com>> wrote:
Hi,
We encountered th
Planet Cassandra has some resource pages related to migrations to Cassandra.
For HBase:
http://planetcassandra.org/hbase-to-cassandra-migration/
There are pages for migration from Oracle, MySQL, MongoDB, and Redis, as well.
-- Jack Krupansky
From: Akshay Ballarpure
Sent: Friday, November 28, 2
Hello all,
If one has a table like this:id text,ts timestampvalues list
PK (id,ts)
How will the DTCS work? I am asking this because the writeTime() function does
not work on collections.
Hi,
We encountered the same problem and created a JIRA for it:
https://issues.apache.org/jira/browse/CASSANDRA-8387 .
/Marcus O
On 11/27/2014 04:19 PM, DuyHai Doan wrote:
Hello Peter
For safe concurrent table creation, use CREATE TABLE xxx IF NOT
EXISTS. It will use light weight transacti
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