Hi,
thanks for your answer.
We plan to use manual indexing too (with native C* indexing for other
cases).
So, for one index, we will get plenty of FK and a MultiGet call to get all
the associated entities, with RP, would then spread all the cluster.
As we don't know the cluster size yet, and as i
On Mon, 2012-10-01 at 10:45 +0200, Clement Honore wrote:
> We plan to use manual indexing too (with native C* indexing for other
> cases).
> So, for one index, we will get plenty of FK and a MultiGet call to get all
> the associated entities, with RP, would then spread all the cluster.
> As we don'
It's not about columns, it's about rows, see example statement.
In QueryProcessor#processStatement it reads rows into list, then does
list.size()
2012/10/1 aaron morton
> CQL will read everything into List to make latter a count.
>
>
> From 1.0 onwards count paginated reading the columns. What v
Hi all
we are running c* 1.0.8 and found some strange row level tombstone problems.
Some rows (~50 in around 2B keys) have markedForDeleteAt timestamps in
the future (so they 'drop' all writes) and 0 values as localDeletionTime.
A non-thorough check didn't bring up any code paths that could l
Since I was just fiddling around with sst2json: if you have row level
deletes you might get problems since row level deletion info is not
exported in at least 1.0.
But if you're not using those you might be fine.
Віталій Тимчишин wrote:
I suppose the way is to convert all SST to json, then i
I would be surprised if random partitioner hurt your performance. In general,
doing performance tests on a 6 node cluster with PlayOrm Scalable SQL, even
joins queries ended up faster as the parallel disks of reading all the rows was
way faster than reading from a single machine(remember, one d
Hi,
1) Yes. I'm using Random Partitioner
2) All 3 nodes in the cluster have used "auto_bootstrap" to acquire their
part of data (I really don't know if this is correct).
Regards.
On Sat, Sep 29, 2012 at 5:56 AM, Bradford Toney wrote:
> Are you using the random partitoner? Did you set up the tok
You should check the cassandra.yaml file. There is an initial_token in that
file that you should have set. The comment above that property reads
# You should always specify InitialToken when setting up a production
# cluster for the first time, and often when adding capacity later.
# The princi
Hi,
I wish to confirm whether the current mapping (storage) configuration
I have is suited to store data commonly extracted field data from Web
Pages.
My mapping can be seen here [0] which basically specifies three column
families e.g. parse (p), fetch (f) and super columns (sc) within the
webpag
When I execute the command "nodetool ring" the following output appears:
Address DC RackStatus State Load
Effective-Ownership Token
15977425217612630204561194765242499
10.36.214.118 datacenter1 rack1 Up Normal 16.62 GB
54.36% 8211980577784
Nodetool has a move command so you can move to a new better token. Read
up on the documentation there. I have not used it yet myselfŠ.good idea
to test it on your test cluster first.
Dean
On 10/1/12 8:03 AM, "Darvin Denmian" wrote:
>as you can see there is no "Zero Token". Maybe I did somethi
What is really going to matter is what is the applications trying to read?
That is really the critical piece of context. Without knowing what the
application needs to read, it is very hard to design.
One example from a previous post that was a great questions wasŠ
1. I need to get the last 100 r
Hello.
I'm trying to catch the serialized RowMutations from a CommitLogSegment to
capture the data change, but I don't have much idea about how to proceed.
Some one know a way of how to do it? I supposed that it would be kind of
simple.
Regards,
Felipe Mathias Schmidt
*(Computer Science UFRGS, RS
Yep Tyler is right
It seems I have trailing *\u* (null) characters , (one column name is
mymed_embrun.ma...@gmail.com the other mymed_embrun.ma...@gmail.com\u\u
for example)
I'm trying to know at what point they are created...
Thx
2012/9/21 Tyler Hobbs
> If you're seeing that in cas
Yep Tyler is right
It seems I have trailing *\u* (null) characters , (one column name is
mymed_embrun.ma...@gmail.com the other mymed_embrun.ma...@gmail.com\u\u
for example)
I'm trying to know at what point they are created...
Thx
2012/9/21 Tyler Hobbs
> If you're seeing that in cas
well don't know why I couldn't reply to the initial thread..
yep Tyler is right I have columns with trailing null chars
mycolumn, mycolumn\u\u prints the same in cassandra-cli, but not if
you write the output in a file
I haven't find where they come from, but no matters the architecture we
There are some interesting results in the benchmarks below:
http://www.slideshare.net/renatko/couchbase-performance-benchmarking
Without starting a flame war etc, I'm interested if these results should
be considered "Fair and Balanced" or if the methodology is flawed in some
way ? (for instance i
Here is my own experience testing couchdb versus cassandra for an
internal application.
My test wasn't some dummy test case, it was realistic workloads that
is 95% write and 5% read. We insert data in batches to maximize
throughput. The critical thing for my use case was to answer "when
does the s
Dean,
We have the same question...
We have thousands of separate feeds of data as well (20,000+). To
date, we've been using a CF per feed strategy, but as we scale this
thing out to accommodate all of those feeds, we're trying to figure
out if we're going to blow out the memory.
The initial doc
From their wiki: "The replication is an incremental one way process
involving two databases (a source and a destination).
The aim of the replication is that at the end of the process, all active
documents on the source database are also in the destination database and
all documents that were delete
Thanks. Do you want me to open a JIRA ticket?
On Oct 1, 2012, at 2:45 AM, Sylvain Lebresne wrote:
> Ok, I'll look what's wrong.
>
> --
> Sylvain
Hi Andy,
things I find odd:
- Replicacount=1 for mongo and couchdb. How is that a realistic benchmark?
I always want at least 2 replicas for my data. Maybe thats just me.
- On the Mongo Config slide they said they disabled journaling. Why do you
disable all safety mechanisms that you would want i
Hello all,
Work has begun on the second edition! Keep hitting me up with ideas.
In particular I am looking for someone who has done work with
flume+Cassandra and pig+Cassandra. Both of these things topics will be
covered to some extent in the second edition, but these are two
instances in which I
Sure.
On Mon, Oct 1, 2012 at 5:33 PM, Jonathan Rudenberg
wrote:
> Thanks. Do you want me to open a JIRA ticket?
>
> On Oct 1, 2012, at 2:45 AM, Sylvain Lebresne wrote:
>
>> Ok, I'll look what's wrong.
>>
>> --
>> Sylvain
Well, I am now thinking of adding a virtual capability to PlayOrm which we
currently use to allow grouping entities into one column family. Right
now the CF creation comes from a single entity so this then may change for
those entities that define they are in a single CF groupŠ.This should not
be
I know there is a 10 day limit if you have a node out of the cluster where you
better be running read-repair or you end up with forgotten deletes, but what
about on a clean cluster with all nodes always available? Shouldn't the
deletes eventually take place or does one have to keep running read
the 10 days is actually configurable... look into gc_grace.
Basically, you always need to run repair once per/gc_grace period.
You won't see empty/deleted rows go away until they're compacted away.
On Mon, Oct 1, 2012 at 6:32 PM, Hiller, Dean wrote:
> I know there is a 10 day limit if you have a
Hey,
now I got it. I'll try it this night :)
Thanks for all replies.
Regards.
On Mon, Oct 1, 2012 at 11:08 AM, Hiller, Dean wrote:
> Nodetool has a move command so you can move to a new better token. Read
> up on the documentation there. I have not used it yet myselfŠ.good idea
> to test it o
Thanks, (actually new it was configurable) BUT what I don't get is why I
have to run a repair. IF all nodes became consistent on the delete, it
should not be possible to get a forgotten delete, correct. The forgotten
delete will only occur if I have a node down and out for 10 days and it
comes ba
Oh, and I have been reading Aaron Mortan's article here
http://thelastpickle.com/2011/05/15/Deletes-and-Tombstones/
On 10/1/12 12:46 PM, "Hiller, Dean" wrote:
>Thanks, (actually new it was configurable) BUT what I don't get is why I
>have to run a repair. IF all nodes became consistent on the
inline...
On Mon, Oct 1, 2012 at 7:46 PM, Hiller, Dean wrote:
> Thanks, (actually new it was configurable) BUT what I don't get is why I
> have to run a repair. IF all nodes became consistent on the delete, it
> should not be possible to get a forgotten delete, correct. The forgotten
> delete w
Created https://issues.apache.org/jira/browse/CASSANDRA-4742
Any clue regarding the first question in this thread (key cache > number of
keys in CF, and not many deletes on that CF)?
Thanks,
*Tamar Fraenkel *
Senior Software Engineer, TOK Media
[image: Inline image 1]
ta...@tok-media.com
Tel:
Brian,
On Mon, Oct 1, 2012 at 4:22 PM, Brian O'Neill wrote:
> We haven't committed either way yet, but given Ed Anuff's presentation
> on virtual keyspaces, we were leaning towards a single column family
> approach:
> http://blog.apigee.com/detail/building_a_mobile_data_platform_with_cassandra_-_
Its just a convenient way of prefixing:
http://hector-client.github.com/hector/build/html/content/virtual_keyspaces.html
-brian
On Mon, Oct 1, 2012 at 4:22 PM, Ben Hood <0x6e6...@gmail.com> wrote:
> Brian,
>
> On Mon, Oct 1, 2012 at 4:22 PM, Brian O'Neill wrote:
>> We haven't committed either wa
That looks like it may be a bug, can you create a ticket on
https://issues.apache.org/jira/browse/CASSANDRA ?
Thanks
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 28/09/2012, at 7:50 AM, William Oberman wrote:
> I don't want to switch my cassa
I assume you have resolved this but if someone else is looking…
You can stop a validation compaction with nodetool stop
AFAIk the only way to stop streaming is to restart the node.
You can also use nodetool setstreamthroughput to reduce the streaming
throughput.
Cheers
-
Aa
> The other nodes may be trying to connect to it - it may be listed as a
> seed node on the other machines?
The other nodes will be looking for it.
Change the Cluster Name in the yaml file.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On
On Mon, Oct 1, 2012 at 9:38 PM, Brian O'Neill wrote:
> Its just a convenient way of prefixing:
> http://hector-client.github.com/hector/build/html/content/virtual_keyspaces.html
So given that it is possible to use a CF per tenant, should we assume
that there at sufficient scale that there is less
You cannot (and probably do not want to) sort continually when the voting is
going on.
You can store the votes using CounterColumnTypes in column values. When someone
votes you then (somehow) queue a job that will read the vote counts for the
post / comment, pivot and sort on the vote count, a
> It's not about columns, it's about rows, see example statement.
My bad, misread the CQL.
My jira search fu is poor, but I could not find an open ticket for paging row
counts. Could you create one ?
https://issues.apache.org/jira/browse/CASSANDRA
Cheers
-
Aaron Morton
Freela
We are trying to setup a Cassandra cluster and have low read latency
requirements. Running some tests, we do not see the performance that we were
hoping for. Wanted to check if anyone has thoughts on:
1. If these are expected latency times for the data/machine config, etc
2. If not
Hi ,
To explain my suggestions - my thoughts were
a) you need to store entity type information about a comment like date created,
comment text, commented by etc. I cant think of any other master information
for a comment, but in general one starts with entities in a standard static
column fam
Thanks Aaron. That's what I did.
Also, how do I lookup the current value of the setstreamthroughput.
On Mon, Oct 1, 2012 at 2:32 PM, aaron morton wrote:
> I assume you have resolved this but if someone else is looking…
>
> You can stop a validation compaction with nodetool stop
>
> AFAIk the onl
> It looks like what I need. Couple questions.
> Does it work with RandomPartinioner only? I use ByteOrderedPartitioner.
I believe it should work with BOP based on cursory re-examination of
the patch. I could be wrong.
> I don't see it as part of any release. Am I supposed to build my own
> versi
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