On Mon, Jan 23, 2012 at 9:20 PM, Guy Incognito dnd1...@gmail.com wrote:
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
No, you will need to filter client side.
Can you do it in a single row ?
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 24/01/2012, at 10:00 AM, Eric Martell wrote:
HI,
I am trying to create a keys list which I will fetch the key
When the default compaction strategy the SSTables are grouped into buckets,
where the size of every sstable int he bucket is within 50% of the average size
of files in the bucket. There is also a catch all first bucket for all files
less than 50MB (by default).
The min_compaction_threshold CF
Nothing I can thin of other than making the keys uniform.
Having a single index row with the RP can be a pain. Is there a way to
partition it ?
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 23/01/2012, at 11:42 PM, Tharindu Mathew
yeah, well main question remains then, is the node receiving the request
from the client called the coordinator (even if it is not responsible
for that key)?
Or will that node forward the call to the first responsible node who
does the coordinating stuff? (as the cassandra and dynamo paper state)
On Tue, Jan 24, 2012 at 9:57 AM, Peter Dijkshoorn
peter.dijksho...@adyen.com wrote:
yeah, well main question remains then, is the node receiving the request
from the client called the coordinator (even if it is not responsible
for that key)?
Yes.
Or will that node forward the call to the
If you would like to index your rows in an index-row, you could also
choose for indexing the index-rows. This will scale up for any needs and
create a tree structure.
2012/1/24 aaron morton aa...@thelastpickle.com
Nothing I can thin of other than making the keys uniform.
Having a single index
FYI... we finally got around to releasing a version of Virgil that includes
the ability to deploy jobs to remote Hadoop clusters running against
Cassandra Column Families.
http://brianoneill.blogspot.com/2012/01/virgil-remote-hadoop-job-deployment-via.html
This has enabled an army of people to
Hi All,
I've been writing a OSX cassandra data browser, and found that later versions
now only work using the FramedTransport.
As a result I've created a Framed Transport for the thrift cocoa library, and
created a JIRA THRIFT-1503.
Cheers,
--
Jools Enticknap
Thanks Aaron.
How do I implement that in the row? Does row will not have any tombstones?
Please let me know.
Thanks and Regards.
--- On Tue, 1/24/12, aaron morton aa...@thelastpickle.com wrote:
From: aaron morton aa...@thelastpickle.com
Subject: Re: Return list by limit 1 which is NOT null
To:
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Is there a command in cqlsh or cassandra CLI that can display the
various values of the configuration parameters at use.
I am particularly interested in finding the value of ' commitlog_sync'
that the current session is using ?
Thanks.
AJ
Hello
I try to log thrift log message (this need to us for solve communicate
problem between Cassandra daemon and php client ), so in
log4j-server.properties i write follow lines:
log4j.logger.org.apache.thrift.transport=DEBUG,THRIFT
log4j.appender.THRIFT=org.apache.log4j.RollingFileAppender
a) I hate to break it to you, but 6GB x 4 cores != 'high-end machine'.
It's pretty much middle of the road consumer level these days.
b) Hosting the client and Cassandra on the same node is a Bad Idea. It
will depend on what exactly the client will do, but in my experience it
won't work too
Pick a custom loglevel and redirect them with the /etc/syslog.conf ?
2012/1/24 ruslan usifov ruslan.usi...@gmail.com
Hello
I try to log thrift log message (this need to us for solve communicate
problem between Cassandra daemon and php client ), so in
log4j-server.properties i write follow
This email was sent to you by Thomson Reuters, the global news and information
company. Any views expressed in this message are those of the individual
sender, except where the sender specifically states them to be the views of
Thomson Reuters.
Tombstoned rows are returned without any columns.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 25/01/2012, at 4:37 AM, Eric Martell wrote:
Thanks Aaron.
How do I implement that in the row? Does row will not have any tombstones?
Nothing through those API's, can you check the yaml file ?
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 25/01/2012, at 10:10 AM, A J wrote:
Is there a command in cqlsh or cassandra CLI that can display the
various values of the
Do you want to log from inside the thrift code or from the cassandra thrift
classes ?
if it's the later try
log4j.logger.org.apache.thrift=DEBUG,THRIFT
org.apache.thrift.transport is part of thrift proper.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
The issue with major / manual compaction is that it creates a one file. One big
old file.
That one file will not be compacted unless there are (min_compaction_threshold
-1) other files of a similar size. So thombstones and overwrites in that file
may not be purged for a long time.
If you
2012/1/25 aaron morton aa...@thelastpickle.com
Do you want to log from inside the thrift code or from the cassandra
thrift classes ?
Exceptions happens inside thrift, so inside thrift:-)))
if it's the later try
log4j.logger.org.apache.thrift=DEBUG,THRIFT
org.apache.thrift.transport is
No argument there. Thanks for explaining what you were doing to
encrypt client traffic!
On Mon, Jan 23, 2012 at 10:11 PM, Chris Marino ch...@vcider.com wrote:
Hi Jonathan, yes, when I say 'node encryption' I mean inter-Cassandra node
encryption. When I say 'client encryption' I mean encrypted
Shen Sizhong
在 2012-1-25，上午8:57，Eric Hunt eric.o.h...@gmail.com 写道：
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So I decided that it would be beneficial to use batching in my application
since I am doing many, many inserts. When I implemented batching in CQL
using 'BEGIN BATCH'..'APPLY BATCH' I saw a significant decrease in the
speed of inserts, no matter the number of insert statements I included
between
Yes, I can see the yaml files. But I need to confirm through some
database query that the change in yaml on node restart was picked up
by the database.
On Tue, Jan 24, 2012 at 7:07 PM, aaron morton aa...@thelastpickle.com wrote:
Nothing through those API's, can you check the yaml file ?
Cheers
You provide zero information on what you are planning to do with the data.
Thus, your question is impossible to answer.
On 1/24/2012 9:38 PM, francesco.tangari@gmail.com wrote:
Do you think that for a standard project with 50.000.000 of rows on
2-3 machines cassandra is appropriate
or i
Standard analysis, display or aggregate some rows
or standard operations that i can do on a normal dbms
--
francesco.tangari@gmail.com
Inviato con Sparrow (http://www.sparrowmailapp.com/?sig)
Il giorno mercoledì 25 gennaio 2012, alle ore 04.26, Maxim Potekhin ha scritto:
You
I was able to make Cassandra beat MySQL MyISAM (~10k inserts/s against 6k
inserts/s) using two physical machines (laptops) - one the client, and the
other one the server, with 50 inserting threads.
I don't know exactly why yet, but the high-level client that I was using to
C# (Aquiles) was taking
I suppose that a CF Comparator type is used to sort the columns based on
its type, right?
So, let's suppose I have two columns: 1, 3. If I insert column 2 I will end
up with 1, 2, 3, ok?
I'm using the default BytesType as the Comparator type to store time series
columns (actually the value is a
That's for sure not much.
Your rdbms can probably hold the entire dataset in memory, and you can do
all kinds for queries that you want. Cassandra is for some very specific
use cases.
If you really need a cluster, have you thought about MySQL Cluster?
2012/1/25 francesco.tangari@gmail.com
make example of cases please?
--
francesco.tangari@gmail.com
Inviato con Sparrow (http://www.sparrowmailapp.com/?sig)
Il giorno mercoledì 25 gennaio 2012, alle ore 05.29, Gustavo Gustavo ha
scritto:
That's for sure not much.
Your rdbms can probably hold the entire dataset in memory,
There are few slight differences in the execution paths, nothing jumps out (it
*looks* like the authorization to write to the CF is checked for each statement
in the batch, not sure how heavy that is.).
If you send a batch with more statements that concurrent_writers in the yaml
some of those
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