Hi everyone,
I'm a new user of Cassandra, and during my tests, I've encountered a problem
with deleting rows from CFs.
I use Cassandra 0.6.2 and coding in Java, using the native Java Thrift API.
The way my application works, I need to delete multiple rows at a time (just
like reads and writes).
Daniel:
Thanks. That thread helped me solve my problem.
I was able to run a 700k MySQL record import without a single memory error.
I changed the following sections in storage-conf.xml to fix the OutofMemory
errors:
DiskAccessModestandard/DiskAccessMode
Take a look at
https://issues.apache.org/jira/browse/CASSANDRA-494
https://issues.apache.org/jira/browse/CASSANDRA-1027
On 22.06.2010 19:00, Ron wrote:
Hi everyone,
I'm a new user of Cassandra, and during my tests, I've encountered a
problem with deleting rows from CFs.
I use Cassandra
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Dean Steele
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Hello!
I use OrderPreservingPartitioner and assign tokens manually.
Questions are:
1) Why range sorted in alphabetical order, not numeric order ?
It was ok with RandomPartitioner
Address Status Load Range
Ring
84
172.19.0.35
And this one is useful :
https://wiki.fourkitchens.com/display/PF/Using+Cassandra+with+PHP
2010/6/22 Shahan Khan cont...@shahan.me
The wiki is a great place:
http://wiki.apache.org/cassandra/FrontPage
Getting Started: http://wiki.apache.org/cassandra/GettingStarted
Cassandra
2010/6/22 Maxim Kramarenko maxi...@trackstudio.com:
Hello!
I use OrderPreservingPartitioner and assign tokens manually.
Questions are:
1) Why range sorted in alphabetical order, not numeric order ?
It was ok with RandomPartitioner
With RandomPartitioner, tokens are md5 hashes, thus number
What I would expect to have happen is for the removed node to
disappear from the ring and for nodes that are supposed to get more
data to start streaming it over. I would expect it to be hours before
any new data started appearing anywhere when you are anticompacting
80+GB prior to the streaming
right.
in other words, you can delete entire rows w/ batch_mutate in 0.6.3 or
trunk, but for 0.6.2 the best workaround is to issue multiple remove
commands.
On Tue, Jun 22, 2010 at 5:09 AM, Mishail mishail.mish...@gmail.com wrote:
Take a look at
sounds like a problem with your seed configuration
On Tue, Jun 22, 2010 at 3:06 AM, Anthony Ikeda
anthony.ik...@cardlink.com.au wrote:
I had to reconfigure my Cassandra nodes today to allow us to use Lucandra
and made the following changes:
· Shutdown ALL Cassandra instances
·
Why not just use version 1 UUIDs and TimeUUIDType?
On Tue, Jun 22, 2010 at 8:58 AM, David Boxenhorn da...@lookin2.com wrote:
I want to use UUIDs whose alphanumeric order is the same as their
chronological order. So I'm generating Version 4 UUIDs (
As I understand it, the string value of TimeUUIDType does not sort
alphanumerically in chronological order. Isn't that right?
I want to use these ids in Oracle as well as Cassandra, and I want them to
sort in chronological order. In Oracle they will have to be varchars (I
think).
Even in
Gary Dusbabek gdusbabek at gmail.com writes:
*Hopefully* fixed. I was never able to duplicate the problem on my
workstation, but I had a pretty good idea what was causing the
problem. Julie, if you're in a position to apply and test the fix, it
would help help us make sure we've got this
I don't mind missing data for a few hours, it's the weird behaviour of
get_range_slices that's bothering me. I added some logging to
ColumnFamilyRecordReader to see what's going on:
Split startToken=67160993471237854630929198835217410155,
endToken=68643623863384825230116928934887817211
...
Ah, that sounds like
https://issues.apache.org/jira/browse/CASSANDRA-1198. That it
happened after removetoken is just that that happened to change your
ring topology enough to make your queries start hitting it.
On Tue, Jun 22, 2010 at 10:39 AM, Joost Ouwerkerk jo...@openplaces.org wrote:
I
In my system, I have a Cassandra front end, and an Oracle back end. Some
information is created in the back end, and pushed out to the front end, and
some information is created in the front end and pulled into the back end.
Question: How do I locate new rows that have been crated in Cassandra,
On Tue, Jun 22, 2010 at 09:59, David Boxenhorn da...@lookin2.com wrote:
In my system, I have a Cassandra front end, and an Oracle back end. Some
information is created in the back end, and pushed out to the front end, and
some information is created in the front end and pulled into the back
Dop Sun su...@dopsun.com writes:
Updated.
the first Cassandra client lib to make it into the Maven repositories
will probably end up with a big audience. :-)
-Bjørn
On Tue, Jun 22, 2010 at 5:58 AM, David Boxenhorn da...@lookin2.com wrote:
I want to use UUIDs whose alphanumeric order is the same as their
chronological order. So I'm generating Version 4 UUIDs (
...
Is there anything wrong with this idea?
If you want to keep it completely ordered, it's
A little bit of time fuzziness on the order of a few milliseconds is fine
with me. This is user-generated data, so it only has to be time-ordered at
the level that a user can perceive.
I have no worries about my solution working - I'm sure it will work. I just
wonder if TimeUUIDType isn't
This node's load is now growing at a ridiculous rate. It is at 105GB, with
the next most loaded node at 70.63GB.
Given that RF=3, I would assume that the replicas' nodes would grow
relatively quickly too?
On Mon, Jun 21, 2010 at 6:44 AM, aaron morton aa...@thelastpickle.comwrote:
According to
On 6/22/10 10:07 AM, James Golick wrote:
This node's load is now growing at a ridiculous rate. It is at 105GB,
with the next most loaded node at 70.63GB.
Given that RF=3, I would assume that the replicas' nodes would grow
relatively quickly too?
What Replica Placement Strategy are you using
RackUnaware, currently
On Tue, Jun 22, 2010 at 1:26 PM, Robert Coli rc...@digg.com wrote:
On 6/22/10 10:07 AM, James Golick wrote:
This node's load is now growing at a ridiculous rate. It is at 105GB, with
the next most loaded node at 70.63GB.
Given that RF=3, I would assume that the
Converting a Forum application to cassandra's data model.
Tables:
Posts [postID, threadID, userID, subject, body, created, lastmodified]
So this table contains the actual question subject and body.
When a user logs in, they want to see a list of their questions, and also
order by the
rate = operations / latency
On Tue, Jun 22, 2010 at 2:50 PM, Mubarak Seyed se...@apple.com wrote:
How to find out the performance metrics such as write rate per second, and
read rate per second. I could not find out from tpstats and cfstats command.
Are there any attributes in JMX? Can
Not having an index doesn't matter if you're going to read all the
subcolumns back at once, which IIANM is the idea here.
On Mon, Jun 21, 2010 at 12:20 PM, hu wei whtiand...@gmail.com wrote:
in datamodel wiki:
You can think of each super column name as a term and the columns within as
the
I looked at the thrift service implementation and got it working.
(Much faster import!)
Thanks!
On Mon, Jun 21, 2010 at 13:09, Oleg Anastasjev olega...@gmail.com wrote:
Torsten Curdt tcurdt at vafer.org writes:
First I tried with my one cassandra -f instance then I saw this
requires a
On Tue, Jun 22, 2010 at 9:12 AM, David Boxenhorn da...@lookin2.com wrote:
A little bit of time fuzziness on the order of a few milliseconds is fine
with me. This is user-generated data, so it only has to be time-ordered at
the level that a user can perceive.
Ok, so mostly ordered. :-)
I have
I'm having a little block in converting an existing SQL Server schema that we
have into Cassandra Keyspace(s). The whole key-value thing has just not
clicked yet. Do any of you know of any good examples that are more complex
than the example in the readme file?
We are looking to report on
Gary Dusbabek gdusbabek at gmail.com writes:
*Hopefully* fixed. I was never able to duplicate the problem on my
workstation, but I had a pretty good idea what was causing the
problem. Julie, if you're in a position to apply and test the fix, it
would help help us make sure we've got this
Turns out that this is due to a larger proportion of the wide rows in the
system being located on that node. I moved its token over a little to
compensate for it, but it doesn't seem to have helped at this point.
What's confusing about this is that RF=3 and no other node's load is growing
as
On Tue, Jun 22, 2010 at 4:08 PM, James Golick jamesgol...@gmail.com wrote:
Turns out that this is due to a larger proportion of the wide rows in the
system being located on that node. I moved its token over a little to
compensate for it, but it doesn't seem to have helped at this point.
What's
It's compacting at a ridiculously fast rate. The pending compactions have
been growing for a while.
It's also flushing memtables really quickly for a particular CF. Like,
really quickly. Like, one every minute. I increased the thresholds by 10x
and it's still going fast.
On Tue, Jun 22, 2010 at
Hi,
Please confirm if this is an issue and should be reported or I am doing
something wrong. I could not find anything relevant on JIRA:
Playing with 0.7 nightly (today's build), I setup a 3 node cluster this way:
- Added one node;
- Loaded default schema with RF 1 from YAML using JMX;
-
Where can i find the java doc for Hector java client? Do i need to build one
from source?
--
Thanks,
Mubarak Seyed.
We had to take a node down for an upgrade last night. When we brought it
back online in the morning, it got slammed by HH data all day so badly that
it was compacting near constantly, and the pending compactions pool was
piling up. I shut most of the writes down to let things catch up, which they
I couldn't find the docs online but the Ant build script here in the source:
http://github.com/rantav/hector/blob/master/build.xml
has a javadoc target you can run to generate them... hope that helps...
Jon.
On 22 June 2010 21:25, Mubarak Seyed mubarak.se...@gmail.com wrote:
Where can i find
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