Interesting thought, that should work indeed, I'll evaluate both options
and provide an update here once I have results.
Best regards,
Robin Verlangen
*Chief Data Architect*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
*What is CloudPelican? <http:
d from a C* point of view
this should work as it's write heavy. I add hundreds of thousands of
columns to a key, and then read them all at once (or maybe a few times with
pagination), and then remove the entire row by it's primary key.
Any other thoughts on this?
Best regards,
Robin Verla
g Cassandra for this? Or should we use a
different system, like Redis?
Thanks.
Best regards,
Robin Verlangen
*Chief Data Architect*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
*What is CloudPelican? <http://goo.gl/HkB3D>*
Disclaimer: The information co
in a row / SSTable.
Thank you in advance for your help.
Best regards,
Robin Verlangen
*Chief Data Architect*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
*What is CloudPelican? <http://goo.gl/HkB3D>*
Disclaimer: The information contained in this message and att
Not sure whether it's an option for you, but you might consider to do some
in-memory aggregation of counter values and flushing only once every X
updates / seconds. This will decrease both load, latency and throughput.
However this is not possible in every single use case.
Best regards,
Quite some time passed, but Alain, it worked. Thank you very much.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
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intended solely f
Hi Alain,
How can I access that? Web browser does not seem to work. Do I need any
software to login? If so, what is proper software for Windows?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
Disclaime
Hi there,
We have had a crashed node that is currently removed from the rack. However
when I try a schema upgrade / truncate operation it complains of the
unreachable node. I tried the removetoken, but that didn't resolve.
Any ideas on how to fix this?
Best regards,
Robin Verlangen
*Sof
n
top of C* is required.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
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I think I misunderstood your "all data in one location" note. I thought you
meant to store it all in one CF.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
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more nodes and
ever node contains a smaller piece of the cake (~ring).
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
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intended solely for the att
Every CF adds some overhead (in memory) to each node. This is something you
should really keep in mind.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
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what to do yet ...
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
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Do you have any ideas how to do this Vivek?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
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Some additional information: I already read about "Embedding"
http://wiki.apache.org/cassandra/Embedding however that doesn't seem a
rock solid solution to me. The word "volatile" is not really comforting me
;-)
Best regards,
Robin Verlangen
*Soft
ossible without messing around
in the Cassandra core.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
Disclaimer: The information contained in this message and attachments is
intended solely for the attention and use o
er I'm not sure whether
that's the best option.
I think you should stick with Cassandra counter column families.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
<http://goo.gl/Lt7BC>
Disclaimer: The information contained in t
u really bother you would prefer an overcount over
an undercount. If you're counting profit you would not want to measure more
than you actually made. However in all cases you'll want the rights
results: spot on without loss of precision.
Best regards,
Robin Verlangen
*Software engineer*
*
*
e highest of the
two inconsistent values."
I was aware of that. The repair of taking the highest value of two
inconsistent might cause getting higher values? Maybe even much higher
values if it takes place multiple times?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinve
about Cassandra internals can shed some light on this.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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@Rohit: We also use counters quite a lot (lets say 2000 increments / sec),
but don't see the 50-100KB of garbage per increment. Are you sure that
memory is coming from your counters?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
Discl
sues with JBOD, RAID or whatever. If you want to improve
throughput you might consider a RAID-0 setup.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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omehow using an other consistency level?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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confi
Hi Sergey,
That's exactly what I mean. I really hope that this will get released soon!
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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sure your data location is on the
right disk? Default is /var/lib/cassandra/data
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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intended solely for the attention and u
Robbit = Rohit of course, excuse me.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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Hi Robbit,
I think it's running out of disk space, please verify that (on Linux: df -h
).
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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intended solely fo
Hi Aaron,
Is this something that's worth becoming a feature in the future? Or should
I rework my data model? If so, do you have any suggestions?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
Disclaimer: The information contained in
Hi there,
Would it be possible to read only the column names, instead of the names
and values? I would like to store some in the value, but without the cost
of slowing down the reads of the column names (primary task).
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http
iterate through them and delete
> the items.
>
>
> Regards,
>
> Oleg
>
>
>
> On 2012-09-10 09:47:31 +, Robin Verlangen said:
>
>
> Hi there,
>
>
> I'm working on a project that might want to set TTL to roughly 7 years.
> However it might
?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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intended solely for the attention and use of the named addressee and may be
confidential. If you are not the intended rec
Deleting the commitlog files is harmless. It's just a tool that tries to
keep Cassandra more in-sync with the other nodes. A standard repair will
fix all problems that a commitlog replay might do too.
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
It's also some kind of OS (link: http://www.helenos.org/ ), not a really
unique name. However the software looks nice!
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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@Yang: Sounds legit, as internal is not the same as external. Beware of the
fact that internal traffic is only free when it's in the same availability
zone. In the same region is charged with a small amount (~ $0.01).
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W
. Then manually delete columns
from that queue-row.
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
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intended solely for the attention and use of the named addressee and
"What this means is that eventually you will have 1 row in the secondary
index table with 350K columns"
Is this really true? I would have expected that Cassandra used internal
index sharding/bucketing?
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverl
@Brian: You're missing PhpCassa (PHP library)
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
Disclaimer: The information contained in this message and attachments is
intended solely for the attention and use of the named addresse
Hi Nick,
I'm talking about the total writes/reads in the dashboard (left graph). It
exactly tripled during our update. I guess this is a change because of the
fact we also replicate with RF=3. Is that true?
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W
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
Everything still runs smooth. It's really plausible that the 1.1.3 version
resolved this bug.
2012/8/13 Robin Verlangen
> 3 hours ago I finished the upgraded of our cluster. Currently it runs
> quite smooth. I'll give an update within a week if this really solved our
>
3 hours ago I finished the upgraded of our cluster. Currently it runs quite
smooth. I'll give an update within a week if this really solved our issues.
Cheers!
2012/8/13 Robin Verlangen
> @Tyler: We were already running most of our machines in 64bit JVM (Sun,
> not the OpenJDK).
smaller.
> Of course the question remains why an append-only commitlog needs to be
> mmap'ed in the first place, especially for writing..
>
> -h
>
>
>
--
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
Disclaimer: T
>> MessagingService.java (line 534) Waiting for messaging service to quiesce
>> *
>> * INFO [ACCEPT-/85.17.231.89] 2012-08-11 18:05:46,066
>> MessagingService.java (line 690) MessagingService shutting down server
>> thread.*
>> *ERROR [Thrift:1532] 2012-08-11 18:05:
*at
org.apache.cassandra.thrift.Cassandra$Processor$batch_mutate.getResult(Cassandra.java:3164)
*
*at
org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)*
*at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
*
*at
org.apache.cassandra.thrift.Custo
ate the data to Oracle.
> https://github.com/hmsonline/cassandra-triggers/
>
> Let us know if you get things setup with a direct connection.
> We'd be *very* interested int helping out if you find a way to do it.
>
> -brian
>
>
> On Fri, Jul 6, 2012 at 5:31 AM, Robi
Hi Ben,
The amount of keyspaces is not the problem: the amount of column families
is. Each column family adds a certain amount of memory usage to the system.
You can cope with this by adding memory or using generic column families
that store different types of data.
With kind regards,
Robin
Hi there,
Is there anyone out there who's using Tableau in combination with a
Cassandra cluster? There seems to be no standard solution to connect, at
least I couldn't find one. Does anyone know how to tackle this problem?
With kind regards,
Robin Verlangen
*Software engineer*
> Is this still an issue ?
>
> It looks like something shut down the messaging service. Was there
> anything else in the logs ?
>
> Cheers
>
> -
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 28/
zones in case of failure, but establish a high
> level of read or write consistency within a single availability zone.
>
> I appreciate your responses,
> Thanks,
> -Mike
>
>
>
>
--
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E r
r machines with their cpu stuck at 100%. so i went to restart each
> cassandra node one by one. i did node with token id 0 first. i came back
> but doesn't look like it doing anything. once i thought it was up i went
> and restarted the next. this one got stuck on the AMI init star
>
> Please help me to find an answer to this.
>
> Thanks,
> Eran Chinthaka Withana
>
--
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
Disclaimer: The information contained in this message and attachments is
intended
everal
>> people added content to the first edition and it would be great to see
>> that type of participation again.
>>
>> Thank you,
>> Edward
>>
>
>
--
With kind regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro..
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
Source)
at java.lang.Thread.run(Unknown Source)
Is this a common bug in 1.1.1, or did I get a "race" condition?
--
With kind regards,
Robin Verlangen
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