Thank you very much!
*Tamar Fraenkel *
Senior Software Engineer, TOK Media
[image: Inline image 1]
ta...@tok-media.com
Tel: +972 2 6409736
Mob: +972 54 8356490
Fax: +972 2 5612956
On Thu, Aug 16, 2012 at 12:11 AM, aaron morton aa...@thelastpickle.comwrote:
Is there anything to do
Hi all,
bloom filter for row keys is always in RAM. What about SSTable index, and
Metadata?
Is it cached by Cassandra, or it relays on memory mapped files?
Thanks,
Maciej
ERROR 09:02:38,614 Error in ThreadPoolExecutor
java.lang.RuntimeException: java.io.EOFException: unable to seek to
position 93069003 in /opt/analytics/analytics/chart-hd-104-Data.db
(65737276 bytes) in read-only mode
This one looks like an error.
Can you run nodetool with
Yes, the synch may work, and no, I do not want a transaction…I want a
different kind of eventually consistent
That might work.
Let's say server 1 sends a mutation (65 is the pk)
Remove: bill65 Add tim65
Server 2 also sends a mutation (65 is the pk)
Remove: bill65 Add mike65
What everyone does
Hi,
I am trying to run query on cassandra cluster with predicate on row key.
I have column family called Users and rows with row key like
projectid_userid_photos. Each user within a project can have rows like
projectid_userid_blog, projectid_userid_status and so on.
I want to retrieve all
Maybe this would be a special type of column family that could contain
these as my other tables definitely don't want the feature below by the
way.
Dean
On 8/16/12 6:29 AM, Hiller, Dean dean.hil...@nrel.gov wrote:
Yes, the synch may work, and no, I do not want a transactionŠI want a
different
Occasionally as I'm doing my regular anti-entropy repair I end up with a
node that uses an exceptional amount of disk space (node should have about
5-6 GB of data on it, but ends up with 25+GB, and consumes the limited
amount of disk space I have available)
How come a node would consume 5x its
Hi
I have a cluster of 7 nodes:
- Windows Server 2008
- Cassandra 0.7.10
- The nodes are identical (hardware, configuration and client request load)
- Standard batch file with 8GB heap
- I use disk_access_mode = standard
- Random partitioner
- TP stats shows no problems
- Ring command shows no
Hi there,
I just upgraded to opscenter 2.1 (from 1.3). It appears that my writes
have tripled. Is this a change in the display/measuring of opscenter?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
Disclaimer: The information contained in
Hi All,
I am using C++ client libQtCassandra. I have two questions.
1) I want to bulk load data into cassandra through C++ interface. It is
required by my group where i am doing internship. I could bulk load using
sstableloader as specified in Datastax
Hi
If I have a WHERE clause in CQL with several 'AND' and each column is
indexed, which index(es) is(are) used ?
Just the first field in the where clause or all the indexes involved
in the clause ?
Also is index used only with an equality operator or also with greater
than /less than comparator
Hi, I have a cassandra cluster where I'm seeing a lot of thread trashing
from the mutation pool.
MutationStage:72031
Where threads get created and disposed in 100's batches every few minutes,
since it's a 16 core server concurrent_writes is set in 100 in the
cassandra.yaml.
concurrent_writes:
What about SSTable index,
Not sure what you are referring to there. Each row has a in a SStable has a
bloom filter and may have an index of columns. This is not cached.
See http://thelastpickle.com/2011/07/04/Cassandra-Query-Plans/ or
ERROR 09:02:38,614 Error in ThreadPoolExecutor
java.lang.RuntimeException: java.io.EOFException: unable to seek to
position 93069003 in /opt/analytics/analytics/chart-hd-104-Data.db
(65737276 bytes) in read-only mode
This one looks like an error.
Can you run nodetool with
Which nodetool command are you referring to? (info, cfstats, ring,….)
My bad. I meant to write sstableloader
Do I modify the log4j-tools.properties in $CASSANDRA_HOME/conf to set the
nodetool logs to DEBUG?
You can use the --debug option with sstableloader to get a better exception
message.
I want to retrieve all the photos from all the users of certain project. My
sql like query will be select projectid * photos from Users. How can i run
this kind of row key predicate while executing query on cassandra?
You cannot / should not do that using the data model you have. (i.e. you
I am not sure synchronization fixes thatŠŠIt would be kind of
nice if the column bill65 would not actually be removed until after
all servers are eventually consistent...
Not sure thats possible.
You can either serialise updating your custom secondary index on the client
site or resolve
What version are using ? There were issues with repair using lots-o-space in
0.8.X, it's fixed in 1.X
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 17/08/2012, at 2:56 AM, Michael Morris michael.m.mor...@gmail.com wrote:
Occasionally
You may have better luck on the Data Stax forums
http://www.datastax.com/support-forums/
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 17/08/2012, at 4:36 AM, Robin Verlangen ro...@us2.nl wrote:
Hi there,
I just upgraded to
But i couldn't find any information on bulk loading using C++ client
interface.
You cannot.
To bulk load data use the sstableloader, otherwise you need to use the RPC /
CQL API.
2) I want to retrieve all the result of the query(not just first 100 result
set) using C++ client. Is there
Hello all,
I've noticed that when performing a SELECT statement with a list of
columns specified, Cassandra returns all columns in the resulting
row(s) even if they have no value. This creates an apparently
considerable amount of transport and deserialization overhead,
particularly in one use
If I have a WHERE clause in CQL with several 'AND' and each column is
indexed, which index(es) is(are) used ?
The most selective based on the average number of columns per row
https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/index/keys/KeysSearcher.java
Also is
Upgraded to 1.1.3 from 1.0.8 about 2 weeks ago.
On Thu, Aug 16, 2012 at 5:57 PM, aaron morton aa...@thelastpickle.comwrote:
What version are using ? There were issues with repair using lots-o-space
in 0.8.X, it's fixed in 1.X
Cheers
-
Aaron Morton
Freelance Developer
That's some pretty old code. I would guess it was done that way to conserve
resources. And _i think_ thread creation is pretty light weight.
Jonathan / Brandon / others - opinions ?
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On
Hi,
We have a Cassandra 1.0 cluster that we run with RF=3 and perform
operations using a consistency level of quorum. We use batch_mutate for all
inserts and updates for atomicity across column families with the same row
key, but use the thrift interface remove API call in C++ to delete a row so
On Thu, Aug 16, 2012 at 9:08 PM, Terry Cumaranatunge cumar...@gmail.comwrote:
We have a Cassandra 1.0 cluster that we run with RF=3 and perform
operations using a consistency level of quorum. We use batch_mutate for all
inserts and updates for atomicity across column families with the same row
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