It depends a bit on the data and the query patterns.
* How many versions do you have ?
* How many names in each version ?
* When querying do you know the versions numbers you want to query from ? How
many are there normally?
* How frequent are the updates and the reads ?
I would lean towards
also, *please* upgrade to the latest 0.8 release.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 21/01/2012, at 4:31 PM, Maxim Potekhin wrote:
> Did you run repairs withing GC_GRACE all the time?
>
>
>
> On 1/20/2012 3:42 AM, Shammi Ja
If you want to keep the load out of the cassandra process and do the join to
sql off line, take a look at the bin/sstablekeys utility. This will let you
output the keys in an sstable. You will need to do it for every sstable on
every node, create the unique list and then check in your SQL db thi
On Fri, Jan 20, 2012 at 11:02 PM, Peter Schuller <
peter.schul...@infidyne.com> wrote:
> > The problem occurs when this thread is invoked for the second time.
> > In that step , it returns some of data that i already deleted in the
> third
> > step of the previous cycle.
>
> In order to get a gua
Setting a token outside of the partitioner range sounds like a bug. It's mostly
an issue with the RP, but I guess a custom partitioner may also want to
validate tokens are within a range.
Can you report it to https://issues.apache.org/jira/browse/CASSANDRA
Thanks
-
Aaron Morto
I second Peters point, big servers are not always the best.
My experience (using spinning disks) is that 200 to 300 GB of live data load
per node (including replicated data) is a sweet spot. Above this the time taken
for compaction, repair, off node backups, node moves etc starts to be a pain.
> 1. regarding time slicing, if at any point of time I am interested in what
> happened in the last T minutes, then I will need to query more than one row
> of the DimentionUpdates, right?
Yerp.
Sometimes that's is what's needed.
> 2. What did you mean by "You will also want to partition the
The columns are stored at the intersection of the row and the CF. So if you
read all the columns for a row in a CF you are only getting those ones.
Your hector code (using the range) looks correct to me.
Have fun.
Aaron
-
Aaron Morton
Freelance Developer
@aaronmorton
http://w
On Mon, Jan 23, 2012 at 2:10 PM, Shammi Jayasinghe wrote:
>
>
> On Fri, Jan 20, 2012 at 11:02 PM, Peter Schuller <
> peter.schul...@infidyne.com> wrote:
>
>> > The problem occurs when this thread is invoked for the second time.
>> > In that step , it returns some of data that i already deleted i
Hi,
We use Cassandra in a way we always want to range slice queries. Because,
of the tendency to create hotspots with OrderedPartioner we decided to use
RandomPartitioner. Then we would use, a row as an index row, holding values
of the other row keys of the CF.
I feel this has become a burden and
If I understand correctly this is due in Cassandra 1.1. Does anyone know when it
is planned to be released?
Thanks
Tamar
On January 23, 2012 at 11:13 AM Jawahar Prasad wrote:
> Hi..
> Yes there is. But just 2 days back, they have released a patch:
>
> https://issues.apache.org/jira/browse/CA
I am trying to integrate opscenter in our environment and I was
wondering if we can use PAM authentication instead of a password file
for opscenter authentication?
thanks
Ramesh
Hey,
Based on current discussions it looks like it will be in C* 1.1, but won't
be in the default cql package - you'll need to opt into cql3 driver as
there are some incompatible BC changes and they want to give an easier
migration. It will be in the default standard distribution in 1.2.
Alex.
O
On Mon, Jan 23, 2012 at 8:40 AM, Alex Major wrote:
> Based on current discussions it looks like it will be in C* 1.1, but won't
> be in the default cql package - you'll need to opt into cql3 driver as there
> are some incompatible BC changes and they want to give an easier migration.
> It will be
Hi guys,
I got an architectural question about how a write operation flows
through the nodes.
As far as I understand now, a client sends its write operation to
whatever node it was set to use and if that node does not contain the
data for this key K, then this node forwards the operation to the
Think there's some confusion as Tamar has two emails in the same thread
addressing two separate concerns.
I was referring to the discussion over Composite Key support that Tamar
quoted in his second email (the one that I replied to and quoted), not his
first/original question about JDBC.
Unless I
Thanks.
Tamar
On January 23, 2012 at 11:24 AM aaron morton wrote:
> The columns are stored at the intersection of the row and the CF. So if you
> read all the columns for a row in a CF you are only getting those ones.
>
> Your hector code (using the range) looks correct to me.
>
> Have
Your first thought was pretty much correct:
1. The node which is called by the client is the coordinator
2. The coordinator determines the nodes in the ring which can handle the
request ordered by expected latency (via snitch). The coordinator may or may
not be part of these nodes
3. Given the c
Ouch :-) you were asking write ...
Well kind of similar
1. Coordinator calculates all nodes
2. If not enough (according to CL) nodes are alive it throughs unavailable
3. If nodes are down it writes and hh is enabled it writes a hint for that row
4. It sends write request to all nodes (including
Unfortunately the current method using a password file is the only
option for authentication in OpsCenter at the moment. I've noted PAM
authentication as a feature request though.
On Mon, Jan 23, 2012 at 8:16 AM, Ramesh Natarajan wrote:
> I am trying to integrate opscenter in our environment and
Hi,
I'm trying to experiment with Hive using Data in Cassandra. Brisk looks
good, but I'm interested in running the map reduce jobs on HDFS not on CFS.
I'm taking a look at [1], but couldn't figure out how to run it with a
Cassandra cluster. I was wondering is there a simple word count example
si
Take a look at http://wiki.apache.org/cassandra/HadoopSupport and in the source
download of cassandra there's a contrib/pig section that has a wordcount
example.
On Jan 23, 2012, at 1:16 PM, Tharindu Mathew wrote:
> Hi,
>
> I'm trying to experiment with Hive using Data in Cassandra. Brisk look
Hi Jeremy,
Thanks for the reply.
I was looking for a similar sample for Hive. I've already gone through the
Pig sample. I probably wasn't clear about this in my initial mail.
On Tue, Jan 24, 2012 at 12:55 AM, Jeremy Hanna
wrote:
> Take a look at http://wiki.apache.org/cassandra/HadoopSupport an
hi all,
having read: http://wiki.apache.org/cassandra/FAQ#batch_mutate_atomic
i would like some clarification:
is a write to a single row key in a single column family atomic in the
sense that i can do a batch mutate where i
1) write col 'A' to key 'B'
2) write 'col 'C' to key 'B'
and eithe
HI,
I am trying to create a keys list which I will fetch the key and then delete
the same key in the subsequent call.
When I use the CLI list, It always returns first row due to tombstone. Is there
a way I can specify to use the limit 1 and return NOT null value.
Please let me now.
Thanks an
On Mon, Jan 23, 2012 at 10:49 AM, Alex Major wrote:
> Think there's some confusion as Tamar has two emails in the same thread
> addressing two separate concerns.
>
> I was referring to the discussion over Composite Key support that Tamar
> quoted in his second email (the one that I replied to and
Can you elaborate on to what exactly you were testing on the Cassandra
side? It sounds like what this post refers to as "node" encryption
corresponds to enabling "internode_encryption: all", but I couldn't
guess what your client encryption is since Cassandra doesn't support
that out of the box yet
Hi Jonathan, yes, when I say 'node encryption' I mean inter-Cassandra node
encryption. When I say 'client encryption' I mean encrypted traffic from
the Cassandra nodes to the clients. For these benchmarks we used the stress
test client load generator.
We ran test with no encryption, then with 'nod
Any idea whether the hive functionality will be merged to the Cassandra
source?
On Tue, Jan 24, 2012 at 1:00 AM, Tharindu Mathew wrote:
> Hi Jeremy,
>
> Thanks for the reply.
>
> I was looking for a similar sample for Hive. I've already gone through the
> Pig sample. I probably wasn't clear about
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