> Can I just copy data files for the required keyspaces, create schema manually
> and run repair?
If you have something like RF 3 and 3 nodes then yes, you can copy the data
from one node in the source cluster to all nodes in the dest cluster and use
cleanup to remove the unneeded data. Because
Without vnodes the initial_token is stored in the yaml file, as well as the
system LocationInfo CF.
With vnodes the only place the tokens are stored is in the system KS. So moving
a node without it's system KS will cause it to generate new ones which will
mean data is moved around.
Cheers
-
Pls explain why and how.
On Mon, Jul 8, 2013 at 5:44 PM, Sylvain Lebresne wrote:
> If you do have blobs, the preferred way is to not encode them in strings
> at all, but rather to use prepared statement (which don't involve a
> conversion to string).
>
> --
> Sylvain
>
>
> On Mon, Jul 8, 2013 at
I dont know what exactly will happen. These are the things which might
happen
1) Commit log on disk gets recycled so I am assuming it might keep working.
2) SStable wont be able to create new files so it will see an IO exception.
On Mon, Jul 8, 2013 at 5:58 PM, Faraaz Sareshwala wrote:
> What
We have two clusters used by two different groups with vnodes enabled. Now
there is a need to move some of the keyspaces from cluster 1 to cluster 2.
Can I just copy data files for the required keyspaces, create schema manually
and run repair?
Anything else required? Please help.
--
Thanks,
What does cassandra do when it is at its data capacity (disk drives and memtable
is full) and writes continue to pour in? My intuition says that cassandra won't
be able to handle the new writes (they will either get silently dropped or
cassandra will hit an OOM -- does anyone know which one?). The
"Leaving the system keyspaces behind is OK if you are not using vnodes. "
Why is it different for vnodes?
On Mon, Jul 8, 2013 at 3:37 PM, aaron morton wrote:
> This might work for user created keyspaces but might not work for system
> keyspace
>
> Leaving the system keyspaces behind is OK if yo
> It started with Cassandra 1.1.10 and on Friday we've migrated to 1.2.6 and
> now we have the issue that flushes are no longer executed automatically - we
> have to do them every hour by hand (nodetool flush) in order to keep the
> nodes on an acceptable utilizatzion level. Without manual flush
Did you see the demo app ?
Seems to have a few examples of reading data.
https://github.com/mstump/libcql/blob/master/demo/main.cpp#L85
Cheers
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 9/07/2013, at 1:14 AM, Shubham
Glyn,
For tracking purposes could you create an issue on
https://issues.apache.org/jira/browse/CASSANDRA and link to the ticket your
raised.
Just incase something has to change when memmapping.
Cheers
-
Aaron Morton
Freelance Cassandra Consultant
New Zealan
> This might work for user created keyspaces but might not work for system
> keyspace
Leaving the system keyspaces behind is OK if you are not using vnodes.
Cheers
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 9/07/2013,
On Mon, Jul 8, 2013 at 2:39 PM, Tony Anecito wrote:
> I filed the issue in JIRA.
>
For those playing along at home :
https://issues.apache.org/jira/browse/CASSANDRA-5732
=Rob
"If RF=N or RF>N, you can just copy all SStables to all nodes, watching out
for name collision."
This might work for user created keyspaces but might not work for system
keyspace
On Mon, Jul 8, 2013 at 2:07 PM, Robert Coli wrote:
> On Fri, Jul 5, 2013 at 7:54 PM, srmore wrote:
>
>> RF of old
I will try the pre-prod environment to see what happens.
I filed the issue in JIRA.
Thanks!
From: Tony Anecito
To: Robert Coli ; "user@cassandra.apache.org"
Sent: Monday, July 8, 2013 3:18 PM
Subject: Re: Cassandra intermittant with query in 1.2.5...
Thanks Robert I will do that. I alre
Thanks Robert I will do that. I already filled out a question with the initial
info via the forum seeing if I was doing something wrong. I did see a reference
to the issue but it was not repeatable. I am thinking there is a very serious
bug that would worry all Cassandra users if they read this
On Sat, Jul 6, 2013 at 10:57 PM, Tony Anecito wrote:
> I better understand the issue now with secondary index query and Cassadra
> 1.2.5. not returnng rows.
>
> I did some more testng of the issue mentioned below and discovered a very
> repeatable sequence and it is as follows:
>
> 1. Starting st
On Fri, Jul 5, 2013 at 7:54 PM, srmore wrote:
> RF of old and new cluster is the same RF=3. Keyspaces and schema info is
> also same.
>
You have a cluster where RF=3 and N=2? Does it.. work?
What are the tokens of old and new nodes?
>>
> tokens for old cluster ( 2-node )
>
If RF=N or RF>N, you
On Sat, Jul 6, 2013 at 1:50 PM, Rodrigo Felix <
rodrigofelixdealme...@gmail.com> wrote:
>
>- Is it normal to take about 9 minutes to add a new node? Follows the
>log generated by a script to add a new node.
>
> Sure.
>
>- Is there a way to reduce the time to start cassandra?
>
> Not u
Another new release is up in maven repos…
- Astyanx is upgraded to 1.56.42
- Hbase support is almost done(barring those few test cases)
- And following issues are fixed: Thanks to snazy and hsn10 :)
https://github.com/deanhiller/playorm/issues/80
https://github.com/deanhiller/playorm/issues/81
h
Hi Peter,
Can you describe your environment, # of documents and what kind of usage
pattern you have?
On Mon, Jul 8, 2013 at 2:06 PM, Peter Lin wrote:
> I regularly store word and pdf docs in cassandra without any issues.
>
>
>
>
> On Mon, Jul 8, 2013 at 1:46 PM, S Ahmed wrote:
>
>> I'm gues
I regularly store word and pdf docs in cassandra without any issues.
On Mon, Jul 8, 2013 at 1:46 PM, S Ahmed wrote:
> I'm guessing that most people use cassandra to store relatively smaller
> payloads like 1-5kb in size.
>
> Is there anyone using it to store say 100kb (1/10 of a megabyte) and
100kb should be fine. For larger values, there's been a lot of people
doing "file chunking" for a while now. The Astyanax folks have a
recipe for this:
https://github.com/Netflix/astyanax/wiki/Chunked-Object-Store
The DataStax Enterprise CassandraFileSystem impl works similarly.
Your intuition is
I'm guessing that most people use cassandra to store relatively smaller
payloads like 1-5kb in size.
Is there anyone using it to store say 100kb (1/10 of a megabyte) and if so,
was there any tweaking or gotchas that you ran into?
On Sun, Jul 7, 2013 at 8:26 PM, casablinca126.com wrote:
> unsubscribe
>
http://wiki.apache.org/cassandra/FAQ#unsubscribe
=Rob
Hi,
Yes, this continues without the JNA jar.
In fact, the only thing which cured it was a reboot (!)
Some serious dark magic going on there, as there were no Java processes running
and nothing held the cassandra files open.
I found a couple of Java dump texts, and opened an Java bug with one
Thanks Petrov I will read what you sent a link to. I am trying to find out what
capability CQL wise is truely available in order to determine my end state for
my data model.
Last night after I discovered the cashing issues that affected queries I was
able to create two queries one to get a lis
Hi,
I found out that there exist a C++ client libcql for cassandra but its
github repository just provides the example on how to connect to cassandra.
Is there anyone who has written some code using libcql to read and write
data to a cassandra DB, kindly share it.
Thanks
Hi Tony, you can check out a guide here:
http://clojurecassandra.info/articles/kv.html which explains pretty most of
things you need to know about queries for starters.
It includes CQL code examples, just disregard Clojure ones, there's nothing
strictly Clojure-driver specific in that guide.
On
> If you do have blobs, the preferred way is to not encode them in strings
at all, but rather to use prepared statement (which don't involve a
conversion to string).
Awesome.
Thanks.
On Mon, Jul 8, 2013 at 1:44 PM, Sylvain Lebresne wrote:
> If you do have blobs, the preferred way is to not enc
If you do have blobs, the preferred way is to not encode them in strings at
all, but rather to use prepared statement (which don't involve a conversion
to string).
--
Sylvain
On Mon, Jul 8, 2013 at 11:07 AM, Pavel Kirienko <
pavel.kirienko.l...@gmail.com> wrote:
> Hi all,
>
> I am curious why t
The heap size is 3GB and the GC has to run only every 30 minutes... I'm
pretty sure increasing heap won't help.
Am 08.07.2013 11:15, schrieb Radim Kolar:
Without manual flush the CPU goes mad after a couple of hours on each
instance.
increase heap size
--
Steffen Rusitschka
CTO
MegaZebra
Without manual flush the CPU goes mad after a couple of hours on each
instance.
increase heap size
Hi all,
I am curious why there is BLOB datatype that accepts HEX strings only.
HEX encoding requires twice as much space as original data, thus it is
rather ineffective. Instead, base64 encoding with ASCII datatype seems more
effective in terms of space, and I believe it doesn't impose noticeable
Hi cassandra list,
we are having in issue in one of our Cassandra clusters where all 3
nodes with RF 3 have 22 pending tasks (nodetool compactionstats) since
mid of April that are never be executed. Even after a restart they show up.
It started with Cassandra 1.1.10 and on Friday we've migrat
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