I checked and /etc/security/limits.conf on redhat supports zero (0) to
mean unlimited. Here is the sample from the man page. Notice the
soft core entry.
EXAMPLES
These are some example lines which might be specified in
/etc/security/limits.conf.
* soft
Hi,
Recently I downloaded Cassandra v0.7.0 rc1. When I try to run cassandra
it ends with the following logging:
INFO 09:17:30,044 Enqueuing flush of
memtable-locationi...@839514767(643 bytes, 12 operations)
INFO 09:17:30,045 Writing memtable-locationi...@839514767(643 bytes, 12
operations)
Hi guys,
I am trying to run word_count example from contrib directory (0.7 beta
3 and 0.7.0 rc 1).
It works fine in a single-node configuration, but fails with 2+ nodes.
It fails in the assert statement, which caused problems before
(https://issues.apache.org/jira/browse/CASSANDRA-1700).
Here's
Hi community,
during my tests i had several OOM crashes.
Getting some hints to find the problem would be nice.
First cassandra crashes after about 45 min insert test script.
During the following tests time to OOM was shorter until it started to crash
even in idle mode.
Here the facts:
-
Hi everyone, we are working on a Java product based on Cassandra since 0.5, and
Cassandra made a very huge change in 0.7 beta 2, which changes all byte array
into ByteBuffers, and we found this problem which confuses us a lot, here's the
detail about what happened:
The multiget_slice method
You should start by trying 0.7 RC1. Some bugs with the use of
ByteBuffers have been corrected since beta2.
If you still have problem, then it's likely a bug, the byteBuffer
should not be changed from under you.
If it still doesn't work with RC1, it would be very helpful if you can
provide a
Windows is notoriously bad about hanging on to file handles. Make
sure there are no explorer windows or command line windows open to
d:\cassandra\data\system\, and then hope for the best.
Gary.
On Mon, Nov 29, 2010 at 02:49, Ramon Rockx r.ro...@asknow.nl wrote:
Hi,
Recently I downloaded
Please report a bug at https://issues.apache.org/jira/browse/CASSANDRA
On Mon, Nov 29, 2010 at 2:49 AM, Ramon Rockx r.ro...@asknow.nl wrote:
Hi,
Recently I downloaded Cassandra v0.7.0 rc1. When I try to run cassandra
it ends with the following logging:
INFO 09:17:30,044 Enqueuing flush of
Is there anyway to use DIH to import from Cassandra? Thanks
This isn't a first time Cassandra has I/O issues on Windows.
I think it's not easy to review source code and eliminate such issues, but
would like developers to keep in mind such issues in the future.
We're also running a Cassandra cluster on Windows, but 0.7 beta1 (with similar
issue, but for
I've run into this as well. Having confirmed that there are no handles on the
file (it's only ever created and used by Cassandra), and having stepped through
the code, I've concluded that something in the io (not sure if it's the jvm or
the os) stack is lazy about releasing the file handle for
Roman:
I logged a jira ticket about this for further investigation, if you'd like to
follow that.
https://issues.apache.org/jira/browse/CASSANDRA-1787
On Nov 29, 2010, at 3:14 AM, RS wrote:
Hi guys,
I am trying to run word_count example from contrib directory (0.7 beta
3 and 0.7.0 rc 1).
What does the current line(s) in limits.conf look like?
On Mon, Nov 29, 2010 at 2:01 AM, jasonmp...@gmail.com wrote:
I checked and /etc/security/limits.conf on redhat supports zero (0) to
mean unlimited. Here is the sample from the man page. Notice the
soft core entry.
EXAMPLES
Roman:
I commented on the ticket - would you mind answering on there?
https://issues.apache.org/jira/browse/CASSANDRA-1787
Tx,
Jeremy
On Nov 29, 2010, at 3:14 AM, RS wrote:
Hi guys,
I am trying to run word_count example from contrib directory (0.7 beta
3 and 0.7.0 rc 1).
It works fine
So final answer - known issue with RC1 -
https://issues.apache.org/jira/browse/CASSANDRA-1781 - that should be fixed
before 0.7.0 is completed.
On Nov 29, 2010, at 11:31 AM, Jeremy Hanna wrote:
Roman:
I logged a jira ticket about this for further investigation, if you'd like to
follow
* - memlock 0
On Tue, Nov 30, 2010 at 4:40 AM, Nate McCall n...@riptano.com wrote:
What does the current line(s) in limits.conf look like?
On Mon, Nov 29, 2010 at 2:01 AM, jasonmp...@gmail.com wrote:
I checked and /etc/security/limits.conf on redhat supports zero
Ok, I was able to reproduce this with 0 as the value. Changing it to
unlimited will make this go away. A closer reading of the
limits.conf man page seems to leave some ambiguity when taken with the
examples:
All items support the values -1, unlimited or infinity indicating no
limit, except for
Awesome thanks will make the changes
So is the man page inaccurate? Or is jna doing something wrong?
Sent from my iPhone
On Nov 30, 2010, at 7:28, Nate McCall n...@riptano.com wrote:
Ok, I was able to reproduce this with 0 as the value. Changing it to
unlimited will make this go away. A
Sounds like you need to increase the Heap size and/or reduce the memtable_throughput_in_mb and/or turn off the internal caches. Normally the binary memtable thresholds only apply to bulk load operations and it's the per CF memtable_* settings you want to change. I'm notfamiliarwith lucandra
I did a talk last week at the Wellington Rails User Group as a basic introduction to Cassandra. The slides are herehttp://www.slideshare.net/aaronmorton/well-railedcassandra24112010-5901169if anyone is interested.CheersAaron
That is a lot of slides. :) Nice work!
On Mon, Nov 29, 2010 at 3:11 PM, Aaron Morton aa...@thelastpickle.com wrote:
I did a talk last week at the Wellington Rails User Group as a basic
introduction to Cassandra. The slides are
here
Hi,
Thanks for that your suggestions worked a treat. I created a new
cassandra user and set the value to unlimited
and I get the desired log:
INFO 08:49:50,204 JNA mlockall successful
On Tue, Nov 30, 2010 at 7:56 AM, Jason Pell jasonmp...@gmail.com wrote:
Awesome thanks will make the
Hi,
I am using Cassandra 0.7 beta3 and Hector.
I create a mutation map. The mutation involves adding few columns for a
given row. After that I use batch_mutate API to send the changes to
Cassandra.
Question:
If there are multiple column writes on same row in a mutation_map, does
Cassandra show
The DataSource subclass route is what I will probably be interested in.
Are there are working examples of this already out there?
On 11/29/10 12:32 PM, Aaron Morton wrote:
AFAIK there is nothing pre-written to pull the data out for you.
You should be able to create your DataSource sub class
Using batch_mutate on a single row will count as 1 write operation, even if
you mutate multiple columns. Using batch_mutate on N rows will count as N
write operations.
- Tyler
On Mon, Nov 29, 2010 at 5:58 PM, Narendra Sharma
narendra.sha...@gmail.comwrote:
Hi,
I am using Cassandra 0.7 beta3
It occurs in 0.7 beta 3 and 0.7.0 rc 1.
Thank you, Jeremy. I will follow the ticket.
-Roman
On Tue, Nov 30, 2010 at 2:50 AM, Jeremy Hanna
jeremy.hanna1...@gmail.com wrote:
Roman:
I commented on the ticket - would you mind answering on there?
try the OrderPreservingPartitioner
2010-11-30
Bingbing Liu
发件人： RS
发送时间： 2010-11-30 09:14:38
收件人： user
抄送：
主题： Re: word_count example fails in multi-node configuration
It occurs in 0.7 beta 3 and 0.7.0 rc 1.
Thank you, Jeremy. I will follow the ticket.
-Roman
On Tue, Nov 30, 2010
Is there any documentation available on what is possible with secondary
indexes? For eg
- Is it possible to define secondary index on columns within a SuperColumn?
- If I define a secondary index at run time, does Cassandra index all the
existing data or only new data is indexed?
Some
On Mon, Nov 29, 2010 at 7:59 PM, Narendra Sharma
narendra.sha...@gmail.com wrote:
Is there any documentation available on what is possible with secondary
indexes?
Not yet.
- Is it possible to define secondary index on columns within a SuperColumn?
No.
- If I define a secondary index at run
Thanks Jonathan.
Couple of more questions:
1. Is there any technical limit on the number of secondary indexes that can
be created?
2. Is it possible to execute join queries spanning multiple secondary
indexes?
Thanks,
Naren
On Mon, Nov 29, 2010 at 6:02 PM, Jonathan Ellis jbel...@gmail.com
On Mon, Nov 29, 2010 at 11:26 PM, Narendra Sharma
narendra.sha...@gmail.com wrote:
Thanks Jonathan.
Couple of more questions:
1. Is there any technical limit on the number of secondary indexes that can
be created?
Just as with traditional databases, the more indexes there are the
slower
On Mon, Nov 29, 2010 at 9:32 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Mon, Nov 29, 2010 at 11:26 PM, Narendra Sharma
narendra.sha...@gmail.com wrote:
Thanks Jonathan.
Couple of more questions:
1. Is there any technical limit on the number of secondary indexes that
can
be
The 'employees with age = 35' scenario is exactly what they are useful for.
There's a quick section in the pycassa documentation that might be useful:
http://pycassa.github.com/pycassa/tutorial.html#indexes
On Mon, Nov 29, 2010 at 11:41 PM, Narendra Sharma narendra.sha...@gmail.com
wrote:
In this case, it sounds like you should combine columns A and B if you
are writing them both at the same time, reading them both at the same
time, and need them to be consistent.
Obviously, you're probably dealing with more than two columns here, but
there's generally not any value in splitting
What error are you getting?
Remember, get_count() is still just about as much work for cassandra as
getting the whole row; the only advantage is it doesn't have to send the
whole row back to the client.
If you're counting 3+ million columns frequently, it's time to take a look
at counters.
-
Are you sure you're using the same key for batch_mutate() and get_slice()?
They appear different in the logs.
- Tyler
On Thu, Nov 25, 2010 at 10:14 AM, Michael Fortin mi...@m410.us wrote:
Hello,
I forked Cascal (Scala based client for cassandra) and I'm attempting to
update it to cassandra
Hi All
I was wondering if it is possible to match keys partially while
searching in Cassandra.
I have a requirement where I'm storing a large number of records, the
key being something like A|B|T where A and B are mobile numbers and
T is the time-stamp (the time when A called B). Such format
Really great introduction, thanks Aaron.Bookmarked for the team.
J.
Sent from my iPhone
On 29 Nov 2010, at 21:11, Aaron Morton aa...@thelastpickle.com wrote:
I did a talk last week at the Wellington Rails User Group as a basic
introduction to Cassandra. The slides are here
Yes, you can basically do this two ways:
First, you can use an OrderPreservingPartitioner. This stores your keys in
order, so you can grab the range of keys that begin with 'A|B'. Because of
the drawbacks of OPP (unbalanced ring, hotspots), you almost certainly don't
want to do this.
Second,
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