On Jul 27, 2010, at 12:23 AM, Jonathan Ellis wrote:
> Can you turn on debug logging and try this patch?
Yes, but..I am on vacation now, so it will be about 3 weeks from now.
On Jul 26, 2010, at 8:39 PM, Peter Schuller wrote:
>> Completely off topic from the list, but Jonathan do you (or others) by any
>> means know how to create an alias for 127.0.0.2 on a mac? Cause I used
>> 127.0.0.x on linux without a problem, but on my Mac, it seems to need some
>> config to
On Jul 26, 2010, at 3:25 AM, Jonathan Ellis wrote:
> I know on a mac you need to explicitly create an alias for 127.0.0.2
> before it can be used. Maybe something similar applies to Windows.
Completely off topic from the list, but Jonathan do you (or others) by any
means know how to create an
>> And when one of my non-seed nodes in my 3 node cluster is down, I do NOT get
>> the exception.
>> Anyway, guess I need to try and reproduce it in small scale.
>
>Does it return w/ UE immediately, or does it wait for RPCTimeout first?
It returns with UE immediately.
:34 AM, Per Olesen wrote:
> Hi,
>
> Think I might have found out the problem.
> I had only one seed node, and when that node is down, they all give
> UnavailableException. Guess at least one seed needs to be up then? Sounds
> fair.
>
>
> /Per
> _________
Hi,
Think I might have found out the problem.
I had only one seed node, and when that node is down, they all give
UnavailableException. Guess at least one seed needs to be up then? Sounds fair.
/Per
Fra: Per Olesen [...@trifork.com]
Sendt: 9. juli 2010
>I'm not entirely sure but I think you can only use get_range_slices
>with start_key/end_key on a cluster using OrderPreservingPartitioner.
>Dont know if that is intentional or buggy like Jonathan suggest but I
>saw the same "duplicates" behaviour when trying to iterate all rows
>using RP and start
>This is a bug. Can you submit a ticket with test data to reproduce?
Uuuh, maybe...:)
Right now it is happening on some life user data, that I am not sure I can
ship. Haven't tried if I can reproduce locally.
One question: We are running 0.6.2. Could this be fixed in 0.6.3? Not that big
a pr
Anyone?
-
Hi,
I was reading http://wiki.apache.org/cassandra/FAQ#iter_world and decided to
implement the get_range_slices method for listing all keys of a CF. Only thing
is, it doesn't work that well for me :-)
I do as it says (I think), and take KeyRanges of size N and use the key of
To method)
>
> someone please clarify
>
> Thanks
Med venlig hilsen/Best regards
Per Olesen, Developer
Trifork A/S
Spotorno Alle 4, DK-2630 Taastrup
Mobile: +45 23389581 - Mail: p...@trifork.com<mailto:p...@trifork.com>
Hi,
I was reading http://wiki.apache.org/cassandra/FAQ#iter_world and decided to
implement the get_range_slices method for listing all keys of a CF. Only thing
is, it doesn't work that well for me :-)
I do as it says (I think), and take KeyRanges of size N and use the key of the
last call as s
On Jul 9, 2010, at 11:11 AM, ChingShen wrote:
> Which client library do you use?
Direct on thrift api using thrift.jar, in version 917130.
Hi,
I am a bit confused about getting an UnavailableException when doing a QUORUM
write.
I have a 3 node cluster, with RF=3. When all 3 nodes are up, the QUORUM write
succeeds. When 1 of the 3 nodes are down, the QUORUM write fails with
UnavailableException. Shouldn't it be enough with 2 nodes
If new to cassandra, how it achieves its goals etc., I would recommend going
with the "raw" thrift API to start with, until you get a good understanding of
which API calls there are and how they work. I am sure there are nicer APIs,
but they also somewhat hide some of the complexity, that I thin
On Jun 14, 2010, at 6:29 PM, Benjamin Black wrote:
> On Mon, Jun 14, 2010 at 6:09 AM, Per Olesen wrote:
>>
>> So, in my use case, when searching on e.g. company, I can then access the
>> "DashboardCompanyIndex" with a slice on its SC and then grab all the uuids
Hi,
I have a question that relates to how to best model data. I have some pretty
simple tabular data, which I am to show to a large amount of users, and the
users need to be able to search some of the columns.
Given this tabular data:
Company| Amount|...many more columns here
--
Can I expect batch_mutate to work in what I would think of as an atomic
operation?
That either all the mutations in the batch_mutate call are executed or none of
them are? Or can some of them fail while some of them succeeds?
> Why don't you run the benchmark contrib/stress.py to see what performance do
> you get ?
Didn't know about that one.
Will give it a try. Thanks.
On Jun 9, 2010, at 9:47 PM, li wei wrote:
> Thanks a lot.
> We are set READ one, WRITE ANY. Is this better than QUORUM in performance.
Yes, but less consistency safe.
> Do you think the cassandra Cluster (with 2 or nodes) should be always
> faster than Single one node in the reality and theo
Short question: Do cassandra only *really* shine when running a cluster with
lots of nodes?
Same question in a lengthy version:
If what I want to obtain from my cassandra cluster is given as this:
a) protection against data loss if nodes disk-crash
b) good uptime, if servers become unavailable o
Okay. Cool actually. That clears up quite a bit for me :)
On Jun 9, 2010, at 9:26 PM, Jonathan Ellis wrote:
> right
>
> On Wed, Jun 9, 2010 at 11:29 AM, Per Olesen wrote:
>>
>> On Jun 9, 2010, at 1:00 PM, Ben Browning wrote:
>>
>>> There really aren&#
> How to set "write and read with QUORUM"?
You set this through each thrift api call you are making through your java
code. See http://wiki.apache.org/cassandra/API
> They are run physically separate hw (But same since they are VM)
So they share disk.
I think this can have an influence. As I
On Jun 9, 2010, at 1:00 PM, Ben Browning wrote:
> There really aren't "seed nodes" in a Cassandra cluster. When you
> specify a seed in a node's configuration it's just a way to let it
> know how to find the other nodes in the cluster. A node functions the
> same whether it is another node's seed
Hi Wei,
> 1) I found this: the 2 node is slower (30%) than one node in both of write
> and select. Is this normal? (In theory, 2 nodes should be faster than one?).
> I monitroing the 2 nodes and found tehy are working and flush often (so, 2
> nodes works)
Which consistency level are you using
Hi,
Just a quick question on seed nodes and auto bootstrap.
Am I correct in that a seed node won't be able to AutoBootstrap? And if so,
will a seed node newly added to an existing cluster then not take long time
before it actually starts getting any work to it? I mean, if it doesn't start
with
On Jun 7, 2010, at 6:05 PM, Benjamin Black wrote:
> There is no 'master' so all copies are replicas. RF=1 means 1 node
> has the data, RF=2 means 2 do, etc.
>
Okay, thanks (and thanks to Ran also).
I guess 0 doesn't make sense then, and that RF=1 is a bad idea if I want some
protection again
Hi,
I am unclear about what the ReplicationFactor value means.
Does RF=1 mean that there is only one single node that has the data in the
cluster (actually no replication), or, does it mean, that there are two copies
of the data - one "actual" and one "replica" (as in "replicated one time")?
I
> Ben Browning wrote...
>
>[snip/]
>...
> I've been able to read columns out of Cassandra at
>an order of magnitude higher than what you're seeing here but there
>are too many variables to directly compare.
I've been reading with ConsistencyLevel QUORUM in my timings.
If I change to Consis
On Jun 4, 2010, at 5:19 PM, Ben Browning wrote:
> How many subcolumns are in each supercolumn and how large are the
> values? Your example shows 8 subcolumns, but I didn't know if that was
> the actual number. I've been able to read columns out of Cassandra at
> an order of magnitude higher than
On Jun 4, 2010, at 4:46 PM, Jonathan Ellis wrote:
> get_slice reads a single row. do you mean there are 23,000 columns,
> or are you running get_slice in a loop 23000 times?
Hi Jonathan, thanks for answering!
No, I do only one get_slice call.
There are 23.000 SUPER columns, which I read using
Are 6..8 seconds to read 23.000 small rows - as it should be?
I have a quick question on what I think is bad read performance for this simple
setup:
SCF:Dashboard
key:username1 -> {
SC:uniqStr1 -> { col1:val1, col2: val2, ... col8:val8 },
SC:uniqStr2 -> { col1:val1, col2: v
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