Hello,
I have a question concerning count in cassandra, as I would like to count
the rows of a CF:
- is it mandatory to specify a range?
- what is the cost of a count operation on a CF?
Thanks in advance for the answers
Sebastien
Hi there,
Where can I find information regarding secondary indexes? Spent the
past 2 days looking for some good details.
http://wiki.apache.org/cassandra/SecondaryIndexes doesn't yet exist,
althought it's referenced from
http://wiki.apache.org/cassandra/StorageConfiguration
Trying to
http://www.datastax.com/blog/whats-new-cassandra-07-secondary-indexes
On Fri, Jan 28, 2011 at 7:15 AM, Sasha Dolgy sasha.do...@gmail.com wrote:
Hi there,
Where can I find information regarding secondary indexes? Spent the
past 2 days looking for some good details.
Thank you. So, after reading, I'm still unsure if this feature will
afford me a larger benefit when compared to an inverted index
solution.
Has anyone done a pros / cons ?
-sd
On Fri, Jan 28, 2011 at 3:22 PM, Jake Luciani jak...@gmail.com wrote:
Hi Victor,
In my research and playing around with nosql, specifically cassandra,
I see the true benefit in defining search requirements and then
creating CF's and the hierarchy based on this. So for me, I see quite
a bit of simplicity in defining alternate CF's to allow me to
efficiently find a
On Thu, Jan 27, 2011 at 12:23 PM, Chris Burroughs chris.burrou...@gmail.com
wrote:
java -version
java version 1.6.0_20
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01, mixed mode)
cmd line arg (paths edited):
On 01/28/2011 10:51 AM, sridhar basam wrote:
On Thu, Jan 27, 2011 at 12:23 PM, Chris Burroughs chris.burrou...@gmail.com
wrote:
java -version
java version 1.6.0_20
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01, mixed mode)
cmd line
As far as I know, there are no aggregate operations built into Cassandra,
which means you'll have to retrieve all of the data to count it in the
client. I had a thread on this topic 2 weeks ago. It's pretty bad.
--
View this message in context:
Buddasystem is right.
A count returns columns to the client which count it. My advice : do not
count big columns / supercolumns. People in the dev team are trying to
develop distributed counters but I don't know the state of this research.
Best regards,
Victor Kabdebon
http://www.voxnucleus.fr
Are you using a row cache? if so what is it set too? in general it should
not be a percentage.
On Thu, Jan 27, 2011 at 12:23 PM, Chris Burroughs chris.burrou...@gmail.com
wrote:
We have a 6 node Cassandra 0.6.8 cluster running on boxes with 4 GB of
RAM. Over the course of several weeks
On 01/28/2011 11:29 AM, Jake Luciani wrote:
Are you using a row cache? if so what is it set too? in general it should
not be a percentage.
ColumnFamily CompareWith=UTF8Type Name=mycolumnfamily
KeysCached=0 KeyCacheSavePeriodInSeconds=0
RowsCached=40
batch_mutate doesn't guarantee consistency. each mutation in the batch
is guaranteed to be consistent based on your CL, but if it returns an
error it means that it couldn't complete all mutations ... but the
converse isn't true. it may have successfully completed some
mutations. if you get
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On Fri, Jan 28, 2011 at 6:28 PM, Eric Evans eev...@rackspace.com wrote:
Unsubscribing from this is list is easy, provided you read the
What about your permgen usage? Do you track that? Use something like jstat
-gc -t pid 5s 100 to track it. Or turn up verbose GC on your command
line options to what is happening.
Sridhar
On Fri, Jan 28, 2011 at 11:38 AM, Chris Burroughs chris.burrou...@gmail.com
wrote:
On 01/28/2011
Hi,
I have two kinds of data that I would like to fit in one super column
family; I am trying this, for the reasons of implementing fast
database retrievals by combining the data of two rows into just one
row.
First kind of data, in supercolumn family, is named with timeUUIDs as
supercolumn
any word on when to expect 0.7.1? lots of good fixes we need. trying
to decide if i should apply patches or wait.
thx!
Eric just posted to -dev that he's putting a new set of artifacts
together for vote.
On Fri, Jan 28, 2011 at 12:48 PM, B. Todd Burruss bburr...@real.com wrote:
any word on when to expect 0.7.1? lots of good fixes we need. trying to
decide if i should apply patches or wait.
thx!
--
nodetool remotetoken or nodetool decommission
http://wiki.apache.org/cassandra/Operations#Removing_nodes_entirely
Hope that helps
Aaron
On 28 Jan 2011, at 11:30, buddhasystem wrote:
OK, after running repair and waiting overnight the rebalancing worked and
now 3 nodes share the load as I
Sorry Aaron but this doesn't help. As I said, machine is dead, kaput,
finished. So I can't do decommission. I can remove token to any other
node, but -- the dead machine is going to hang around in my ring reports
like a zombie.
--
View this message in context:
It seems like it was just earlier this week that we announced the
release of 0.6.10. Oh wait, it was. In the time since though,
CASSANDRA-2058[1] was found and fixed, and that seemed like reason
enough to fast-track a new release.
Source and binary archives are available from the Downloads
+1
On Fri, Jan 28, 2011 at 3:13 PM, Eric Evans eev...@rackspace.com wrote:
It seems like it was just earlier this week that we announced the
release of 0.6.10. Oh wait, it was. In the time since though,
CASSANDRA-2058[1] was found and fixed, and that seemed like reason
enough to
Err. I mean't, thanks Evan for getting this released so fast :)
On Fri, Jan 28, 2011 at 3:18 PM, Chris Goffinet c...@chrisgoffinet.comwrote:
+1
On Fri, Jan 28, 2011 at 3:13 PM, Eric Evans eev...@rackspace.com wrote:
It seems like it was just earlier this week that we announced the
Hi!
Trying to test the 0.7 release with some offbeat settings to check the
behavior.
- Single node cluster
- Key_cache_size - default
- Row_cache_size - default
- Min/max compaction threshold - 0 (so this is disabled)
- Disk_access_mode :
On Fri, Jan 28, 2011 at 1:51 PM, buddhasystem potek...@bnl.gov wrote:
I can remove token to any other
node, but -- the dead machine is going to hang around in my ring reports
like a zombie.
If you remove token on the other nodes and the dead machine hangs
around, that sounds like a bug? I
Requesting too much data in a single request is user error. That is
why you have start columns/rows, so you can page through a large set.
On Fri, Jan 28, 2011 at 6:48 PM, Rajat Chopra rcho...@makara.com wrote:
Hi!
Trying to test the 0.7 release with some offbeat settings to check the
Thanks Jonathan.
But the read fails in all cases, even when start_column/end_column span is 10
columns here, and even when column_count is set appropriately. Or did I miss
what you said?
The trace seems to suggest an entire super_column is being deserialized.
Rajat
-Original Message-
It does remove tokens, and the ring shows that the problematic node owns 0
tokens, which is OK. However, it's still there, listed.
It's not a bug but kind of like a feature -- you can move that node back in
two days later and move tokens in same or different way.
What I wish happened was that
On 01/28/2011 12:42 PM, sridhar basam wrote:
What about your permgen usage? Do you track that? Use something like jstat
-gc -t pid 5s 100 to track it. Or turn up verbose GC on your command
line options to what is happening.
http://img59.imageshack.us/img59/1056/permgen.png
This is over
On 01/28/2011 04:12 AM, Zhu Han wrote:
Chris,
Somebody else and I have the same problem as you, and reported it here:
http://www.apacheserver.net/Very-high-memory-utilization-not-caused-by-mmap-on-sstables-at1082970.htm
[NB: It is not solved although the titles said so. Some response from
http://wiki.apache.org/cassandra/CassandraLimitations
Any request for a subcolumn deserializes _all_ the subcolumns in that
supercolumn, so you want to avoid a data model that requires large
numbers of subcolumns.
On Fri, Jan 28, 2011 at 7:40 PM, Rajat Chopra rcho...@makara.com wrote:
Thanks
Next week is the Strata conference and not one, not two, but five
Cassandra events!
In chronological order:
1. My Strata Cassandra tutorial Tuesday afternoon:
http://strataconf.com/strata2011/public/schedule/detail/16911
2. Cassandra Meetup organized by Jeremy Hanna Tuesday evening:
HelloNo India-based Cassandra / NoSQL events? :-( :-)
On Sat, Jan 29, 2011 at 8:31 AM, Jonathan Ellis jbel...@gmail.com wrote:
Next week is the Strata conference and not one, not two, but five
Cassandra events!
In chronological order:
1. My Strata Cassandra tutorial Tuesday afternoon:
web site says sold out, too bad for me ;)
On 01/28/2011 07:01 PM, Jonathan Ellis wrote:
Next week is the Strata conference and not one, not two, but five
Cassandra events!
In chronological order:
1. My Strata Cassandra tutorial Tuesday afternoon:
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