maven central
- Stephen
---
Sent from my Android phone, so random spelling mistakes, random nonsense
words and other nonsense are a direct result of using swype to type on the
screen
On 5 Apr 2011 06:47, Mikael Wikblom mikael.wikb...@sitevision.se wrote:
Hi,
is there a maven repository where I
Okay, I see. But isn't there a big issue for scaling here ?
Imagine that I am the developper of a certain very successful website : At
year 1 I need 20 CF. I might need to have 8Gb of RAM. Year 2 I need 50 CF
because I added functionalities to my wonderful webiste will I need 20 Gb of
RAM ?
I think the key thing to remember is that compaction is performed on
*similar* sized sstables. so it makes sense that over time this will have a
cascading effect. I think by default it starts out with compacting 4
flushed sstables, then the cycle begins.
On Apr 4, 2011 3:42pm, shimi
Hi all,
We are running .6.12, is there any particular precaution to rename the
keyspace, is it enough to shutdown cassandra, update storag-conf.xml,
rename data directory and start cassandra again.
Thanks for your help.
Jean-Yves
Hi everyone. I'm having trouble while inserting big amounts of data into
cassandra. I'm getting this exception:
batch_mutate failed: out of sequence response
I'm gessing is due to very big mutates. I have made the batch mutates
smaller and it seems to be behaving. Can somebody shed some light?
That should work, but nodetool drain before shutdown to avoid
confusing the commitlog.
On Tue, Apr 5, 2011 at 3:56 AM, Jean-Yves LEBLEU jleb...@gmail.com wrote:
Hi all,
We are running .6.12, is there any particular precaution to rename the
keyspace, is it enough to shutdown cassandra, update
I too have seen the out of sequence response problem. My solution has just been
to retry and it seems to work. None of my mutations are THAT large ( 200
columns).
The only related information I could find points to a thrift/ubuntu bug of some
kind
sounds like they haven't been munmapped yet. try forcing a GC.
On Sat, Apr 2, 2011 at 5:38 AM, Roland Gude roland.g...@yoochoose.com wrote:
Hi,
The open file limit is 1024
Sstable count is somewhere around 20 or so thread count is in the same order
of magnitude I guess
But lsof shows
El mar, 05-04-2011 a las 09:35 -0400, Dan Hendry escribió:
I too have seen the out of sequence response problem. My solution has just
been to retry and it seems to work. None of my mutations are THAT large (
200 columns).
The only related information I could find points to a thrift/ubuntu
Oops, I saw EOFException and jumped to scrub.
But your EOF is coming from TCP. Something (almost certainly a
non-cassandra process) is connecting to the internal Cassandra
communication port (the one that defaults to 7000) and disconnecting.
On Mon, Apr 4, 2011 at 4:14 AM, Kazuo YAGI
You're right, the advice there is not helpful.
On Mon, Apr 4, 2011 at 10:13 AM, shimi shim...@gmail.com wrote:
It make sense to me that compaction should solved this as well since
compaction creates new index files.
Am I missing something here?
WARN [CompactionExecutor:1] 2011-04-04
Adjusting indexinterval is unlikely to be useful on very narrow rows.
(Its purpose is to make random access to _large_ rows doable.)
On Mon, Apr 4, 2011 at 8:38 PM, Chris Burroughs
chris.burrou...@gmail.com wrote:
I have a case with very narrow rows. As such I have a large row cache
that does
I've been seeing this EOF in my system.log file occasionally as well.
Doesn't seem to be causing harm:
ERROR [Thread-22] 2011-04-05 20:37:22,562 AbstractCassandraDaemon.java
(line 112) Fatal exception in thread Thread[Thread-22,5,main]
java.io.IOError: java.io.EOFException
at
I am considering treating the node as a dead node, delete it's data files and
bootstrap from scratch.
Is that a reasonable approach? Is there a way for me to identify the bad file/s
and remove it/them?
From: Or Yanay [mailto:o...@peer39.com]
Sent: Monday, April 04, 2011 7:19 PM
To:
On Tue, Apr 5, 2011 at 8:54 AM, Jonathan Ellis jbel...@gmail.com wrote:
Adjusting indexinterval is unlikely to be useful on very narrow rows.
(Its purpose is to make random access to _large_ rows doable.)
Whoops, that's column_index_size_in_kb.
I'd play w/ keycache before index_interval
On 04/05/2011 03:49 PM, Jonathan Ellis wrote:
Sounds like https://issues.apache.org/jira/browse/CASSANDRA-2324
Yes, that sounds like the issue I'm having. Any chance for a fix for
this being backported to 0.7.x?
Anyway, I guess I might as well share the test case I've used to
reproduce this
when doing a nodetool move , after about 15 minutes I got the below
exception. The cassandra log seems to indicate that the move is still
ongoing. Is this anything to worry about?
Exception in thread main java.rmi.UnmarshalException: Error unmarshaling
return header; nested exception is:
On 04/05/2011 09:57 AM, Jonathan Ellis wrote:
On Tue, Apr 5, 2011 at 8:54 AM, Jonathan Ellis jbel...@gmail.com wrote:
Adjusting indexinterval is unlikely to be useful on very narrow rows.
(Its purpose is to make random access to _large_ rows doable.)
Whoops, that's column_index_size_in_kb.
I'm still running into problems. Now I don't write more than 100 columns
at a time, and I'm having lots of Stop-the-world gc pauses.
I'm writing into three column families, with memtable_operations = 0.3
and memtable_throughput = 64.
Is any of this wrong?
-Original Message-
From:
Update with more info:
I'm still running into problems. Now I don't write more than 100 columns
at a time, and I'm having lots of Stop-the-world gc pauses.
I'm writing into three column families, with memtable_operations = 0.3
and memtable_throughput = 64. There is now swapping, and full GCs
On Tue, Apr 5, 2011 at 12:01 AM, Maki Watanabe watanabe.m...@gmail.com wrote:
Hello,
On reading O'Reilly's Cassandra book and wiki, I'm a bit confusing on
nodetool repair and compact.
I believe we need to run nodetool repair regularly, and it synchronize
all replica nodes at the end.
AJ,
One issue that I found in using load balancer in front of cassandra nodes is
that a single node might become bogged down by compaction, or other actions
unrelated to the client. If the load balancer does not pick this up in
time, it might route client requests to the node that is temporarily
Can someone comment on this ? Or is the question too vague ?
Honestly yeah I couldn't figure out what you were asking ;) What
specifically about the diagram are you trying to convey?
--
/ Peter Schuller
Step 1: disable swap.
2011/4/5 Héctor Izquierdo Seliva izquie...@strands.com:
Update with more info:
I'm still running into problems. Now I don't write more than 100 columns
at a time, and I'm having lots of Stop-the-world gc pauses.
I'm writing into three column families, with
Other than you will have to watch log to know when it is done, no.
On Tue, Apr 5, 2011 at 9:54 AM, Jonathan Colby jonathan.co...@gmail.com wrote:
when doing a nodetool move , after about 15 minutes I got the below
exception. The cassandra log seems to indicate that the move is still
On Tue, Apr 5, 2011 at 9:50 AM, Jonathan Colby jonathan.co...@gmail.com wrote:
Hi experts,
We have a cluster of 4 nodes across 2 data centers and we are using
OldNetworkTopology to balance the replicas (RF=3).
Question: Can we afford to lose 1 node in a data center and still have
This is a minor followup to this thread which includes required context:
http://www.mail-archive.com/user@cassandra.apache.org/msg09279.html
I haven't solved the problem, but since negative results can also be
useful I thought I would share them. Things I tried unsuccessfully (on
individual
Hi Jonathan -
Would you recommend to disable system swap as a rule? I'm running on Debian
64bit and am seeing light swapping:
total used free sharedbuffers cached
Mem: 8003 7969 33 0 0 4254
-/+ buffers/cache:
Would you recommend to disable system swap as a rule? I'm running on Debian
64bit and am seeing light swapping:
I'm not Jonathan, but *yes*. I would go so far as to say that
disabling swap is a good rule of thumb for *most* production systems
that serve latency sensitive traffic. For a
I've seen the other posts about memory consumption, but I'm seeing some weird
behavior with 0.7.4 with 5 GB heap size (64 bit system with 8 GB ram
total)...
note the virtual mem used 20.6 GB ?! and Shared 8.4 GB ?!
PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND
note the virtual mem used 20.6 GB ?! and Shared 8.4 GB ?!
http://wiki.apache.org/cassandra/FAQ#mmap
--
/ Peter Schuller
Hi All,
Is there a way I can run compaction on the cassandra cluster from a
machine where cassandra is not installed.I have a cluster of 6 machines
but I want to run compaction on them from a different machine which does not
have cassandra installed.
Thanks
Anurag
- Different collectors: -XX:+UseParallelGC -XX:+UseParallelOldGC
Unless you also removed the -XX:+UseConcMarkSweepGC I *think* it takes
precedence, so that the above options would have no effect. I didn't
test. In either case, did you definitely confirm CMS was no longer
being used? (Should be
Is there a way I can run compaction on the cassandra cluster from a
machine where cassandra is not installed.I have a cluster of 6 machines
but I want to run compaction on them from a different machine which does not
have cassandra installed.
nodetool -h your-remote-host compact,
I added a node to the cluster and I am having a difficult time reassigning the
new tokens.
It seems after a while nothing shows up in the new node's logs and it just
stays in status Leaving. nodetool netstats on all nodes shows Nothing
streaming to/from.
There is no activity in the other
Well, since my last post, about 10 minutes later, the node goes into bootstrap
mode. It's kind of worrying that a lot of time goes by where it seems like
nothing is happening, then all of a sudden things get going again.
22,584 keys. Time: 20,276ms.
INFO [HintedHandoff:1] 2011-04-05
If you can reach your jmx ip/port, you can use any jmx client to start a
compaction. Use jconsole to connect to your jmx ip/port and then navigate to
mbeans-org.apache.cassandra.db-columnfamilies- -operations
Underneath there you can invoke a bunch of methods including compaction.
Sridhar
Anyone know if 0.7.4 will work with thirft 0.6? Or do I have to keep
thrift 0.5 around to use it?
Thanks!
Jeremiah Jordan
Application Developer
Morningstar, Inc.
Morningstar. Illuminating investing worldwide.
+1 312 696-6128 voice
Hi,
I am thinking about using Cassandra for our research project, and we
are thinking about one interesting feature.
Our setup has multiple datacenters located in different geography
locations. Data is accessed with predictable patterns. Think of
something like Craigslist, data objects
0.6 should be wire-compatible with 0.5 -- i.e., go ahead and build
your clients with it.
there's a few changes needed though if you want to build the server
against 0.6: https://issues.apache.org/jira/browse/CASSANDRA-2412
On Tue, Apr 5, 2011 at 4:28 PM, Jeremiah Jordan
You'd really want https://issues.apache.org/jira/browse/CASSANDRA-2369
to control per-row. Let me know if you'd like to help tackle that.
On Tue, Apr 5, 2011 at 5:05 PM, Yudong Gao st...@umich.edu wrote:
Hi,
I am thinking about using Cassandra for our research project, and we
are thinking
Pelops raises a RuntimeException? Can you provide more info please?
--
Dan Washusen
Make big files fly
visit digitalpigeon.com
On Tuesday, 5 April 2011 at 11:43 PM, Héctor Izquierdo Seliva wrote:
El mar, 05-04-2011 a las 09:35 -0400, Dan Hendry escribió:
I too have seen the out of sequence
Hi All,
I had written code for cassandra 0.6.3 using JMX to call
compaction,when I try to use that code to connect to 0.7.3 I get the
following
error
Exception in thread main java.rmi.ConnectException: Connection refused to
host: 127.0.0.1; nested exception is:
Thanks for the reply, Jonathan!
This per-row control is exactly what I need. I will be happy to help
tackle it in the long term. Is there some further information or plan
for this issues?
One thing I am worrying about is how to maintain the location
information for each row. The current
On Tue, Apr 5, 2011 at 8:37 PM, Yudong Gao st...@umich.edu wrote:
One thing I am worrying about is how to maintain the location
information for each row. The current partitioner maps a key to MD5
hash, and it is almost impossible to control the hashed token by
manipulating the value of the
Thanks Sylvain, it's very clear.
But should I still need to force major compaction regularly to clear tombstones?
I know that minor compaction clear the tombstones after 0.7, but
maximumCompactionThreshold limits the maximum number of sstable which
will be merged at once, so to GC all tombstones
On Tue, Apr 5, 2011 at 9:59 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Tue, Apr 5, 2011 at 8:37 PM, Yudong Gao st...@umich.edu wrote:
One thing I am worrying about is how to maintain the location
information for each row. The current partitioner maps a key to MD5
hash, and it is almost
On Tue, Apr 5, 2011 at 10:45 PM, Yudong Gao st...@umich.edu wrote:
A better solution would be to just push the DecoratedKey into the
ReplicationStrategy so it can make its decision before information is
thrown away.
I agree. So in this case, I guess the hashed based token ring is still
Hi Aaron,
I failed to mention that my queries have very high frequency so this is not
a data analytics problem.
That's the reason I wanted to reduce transferring a lot of data to client or
using standard map/reduce solutions that can do the job but add too much
latency.
Pig or hive are
I think you need to specify the port in the JMXServiceURL. The exception
indicates there is no service listening on given host and port. Also, I
guess, based on 127.0.0.1, you are running the client on same m/c as
Cassandra. If that is not the case then fix the host as well. You might want
to look
Cassandra 0.7.4
# nodetool -h localhost getcompactionthreshold Keyspace1 Standard1
min=4 max=32
# nodetool -h localhost setcompactionthreshold Keyspace1 Standard1 0 0
# nodetool -h localhost getcompactionthreshold Keyspace1 Standard1
min=0 max=0
Now the thresholds have changed on the JMX pannel,
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