Hello tony,
I couldnt reply earlier because I've been decorating over the weekend so
have been a bit busy.
Let me know what's happens.
Out of couriosity why are you using and not a cql3 native driver?
Thanks
Jabbar Azam
On 24 Jun 2013 00:32, Tony Anecito adanec...@yahoo.com wrote:
Hi
We would be very very interested in your results. We currently run 10M but
have heard of 256M sizes as well.
Please let us know what you find out.
Thanks,
Dean
From: Andrew Bialecki
andrew.biale...@gmail.commailto:andrew.biale...@gmail.com
Reply-To:
I haven't seen this error in a long time. We just received the below error in
production when rebuilding a node…any ideas on how to get around this? We had
rebuilt 3 other nodes already I think(we have been swapping hardware)
ERROR 06:32:21,474 Exception in thread Thread[ReadStage:1,5,main]
Ah, so digging deeper, it is not bootstrapping. How do I force the node
to bootstrap? (this is version 1.2.2 and the other nodes somehow knew to
bootstrap automatically but this one I need to force for some reason). I
remember there was a property for this.
NOTE: I enabled some debug logs and
Oh shoot, this is a seed node. Is there documentation on how to bootstrap
a seed node? If I have seeds of A, B, C for every machine on the ring and
I am bootstrapping node B, do I just modify cassandra.yaml and remove node
B from the yaml file temporarily and boot it up (Note, I still received
For ease of use, we actually had a single cassandra.yaml deployed to every
machine and a script that swapped out the token and listen address. I had seed
nodes ip1,ip2,ip3 as the seeds but what I didn't realize was then that these
nodes had themselves as seeds. I am assuming that should never
Hi Jabbar,
I am using JDBC driver because almost no examples exist about what you mention.
Even most of the JDBC examples I find do not work because they are incomplete
or out of date. If you have a good reference about what you mentioned I can try
it.
As I menioned I got selects to work
Hi ,
The seeds are only used when a node appears in the cluster. At this moment
it chooses a seed (in the same dc) in order to have some information.
So, the most secure way is to write all your other nodes as seed, but in
fact you need only one up.
if you think that you will never have 3 node
Hello Tony,
This came out recently
http://www.datastax.com/doc-source/developer/java-driver/index.html
I can't vouch for performance but the documentation is ok and it works. I'm
using it on a side project myself.
There is also astyanax by netflix and it also supports CQL 3
I'm having problems with Hadoop job failures on a Cassandra 1.2 cluster due to
Caused by: TimedOutException()
2013-06-24 11:29:11,953 INFO Driver -at
org.apache.cassandra.thrift.Cassandra$get_range_slices_result.read(Cassandra.java:12932)
This is running on a 6-node cluster,
On Sun, Jun 23, 2013 at 2:31 AM, Ananth Gundabattula
agundabatt...@threatmetrix.com wrote:
Looks like the cause of the error was because of not specifying num_tokens
in the cassandra.yaml file. I was under the impression that setting a value
of num_tokens will override the initial_token value .
On Mon, Jun 24, 2013 at 6:04 AM, Hiller, Dean dean.hil...@nrel.gov wrote:
Oh shoot, this is a seed node. Is there documentation on how to bootstrap
a seed node? If I have seeds of A, B, C for every machine on the ring and
I am bootstrapping node B, do I just modify cassandra.yaml and remove
Hello Rob,
I ran into the stack trace when the situation was :
num_tokens unset ( by this I mean not specifying anything ) and
initial_token set to some value.
I was initially under the impression that specifying num_tokens will over
ride the initial_token value and hence left num_tokens blank.
I have got bitten by it once. At least there should be a message saying, there
is no streaming data since it's a seed node.
I searched the source code, the message was there and it got removed at certain
version.
-Wei
From: Robert Coli rc...@eventbrite.com
Hi All
I have a requirement where I need to have my columns sorted by the creation
time. However I would like to have my own naming scheme for the columns and
not use TimeUUID as column names. Please advice as to how I can achieve
this in Cassandra as this has been pretty confusing to me.
Yes, it would be nice at startup just to say don't list your seed node as this
node and then fail out and we would have known this a long long time ago ;).
Dean
From: Wei Zhu wz1...@yahoo.commailto:wz1...@yahoo.com
Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
Send the naming scheme you desire. Is long time since epoch ok? Or a
composite name of time since epoch + (something else)
Dean
From: Bill Hastings bllhasti...@gmail.commailto:bllhasti...@gmail.com
Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
Here is the line in the source code for 1.1.0:
https://github.com/apache/cassandra/blob/cassandra-1.1.0/src/java/org/apache/cassandra/service/StorageService.java#L549
And it's refactored later to this, and the message was removed.
Thank you Robert and others for answering my questions.
I started to play with nodetool and I have few more questions.
Does nodetool cleanup run synchronously or asynchronously ?
If it is running asynchronously is there any way to monitor the progress ?
Thank you
Emalayan
Assuming that database migration is a one time and rare operation, why
don't you try to grab a lock for a short time. If you are able to grab it,
then you can renew it for a longer time. This will make sure that in case
of collision, all contenders wont be locked out for long time.
You can use
Also CAS is in 2.0 which is not production ready so I am not sure how you
will use it.
On Mon, Jun 24, 2013 at 4:35 PM, sankalp kohli kohlisank...@gmail.comwrote:
Assuming that database migration is a one time and rare operation, why
don't you try to grab a lock for a short time. If you are
Yes, that makes sense and that article helped a lot, but I still have a few
questions...
The created_at in our answers table is basically used as a version id.
When a user updates his answer, we don't overwrite the old answer, but
rather insert a new answer with a more recent timestamp (the
No deletes. In my test, I am just writing and reading data.
There is a lot of GC, but only on the younger generation. Cassandra terminates
before the GC for old generation kicks in.
I know that our queries are reading an unusual amount of data. However, I
expected it to throw a timeout
I have a loop that reads a counter, increments it by some integer, then goes
off and does about 500ms of other work. After about 10 iterations of this loop,
the counter value *sometimes* appears to be corrupted.
Looking at the logs, a sequence that just happened is:
Read counter - 15000
I normally have migrations run at server startup and depending upon the
complexity, they could run for a while if they need to do per-row data
transformations. I don't get the point regarding collisions, somebody
is going to be locked out for a while, so getting the lock for a short
period
Our product is in development now so we don't plan on going into
production later when 2.0.0 is out.
Blair
On 06/24/2013 01:36 PM, sankalp kohli wrote:
Also CAS is in 2.0 which is not production ready so I am not sure how
you will use it.
On Mon, Jun 24, 2013 at 4:35 PM, sankalp kohli
Hi Josh,
are you looking at the read counter produced by cfstats?
If so it is not for a CF, but the entire KS and not tied to a specific
operation, but rather per the entire lifetime of JVM.
Just in case, some supporting info:
How does one do an atomic update in a column family with a single column?
I have a this CF
CREATE TABLE schema_migrations (
version TEXT PRIMARY KEY,
) WITH COMPACTION = {'class': 'LeveledCompactionStrategy'};
that records which database migrations have been applied. I want to do
a
Looking at the CAS unit tests [1], if one does a CAS UPDATE to create a ROW:
UPDATE test SET v1 = 2, v2 = 'foo' WHERE k = 0 IF NOT EXISTS
there isn't a CAS DELETE FROM that only uses the partition key. You can
do this to delete the row using CAS:
DELETE FROM test WHERE k = 0 IF v1 =
On 06/24/2013 11:23 PM, Blair Zajac wrote:
CAS UPDATE
Since when C* has IF NOT EXISTS in DML part of CQL?
--
Regards,
Arthur
I have a scenario here. I have a cluster A and cluster B running on cassandra
1.1. I need to copy data from Cluster A to Cluster B. Cluster A has few
keyspaces that I need to copy over to Cluster B. What are my options?
Thanks,SC
On 06/24/2013 11:35 PM, S C wrote:
I have a scenario here. I have a cluster A and cluster B running on
cassandra 1.1. I need to copy data from Cluster A to Cluster B.
Cluster A has few keyspaces that I need to copy over to Cluster B.
What are my options?
Thanks,
SC
I am thinking of
Hi Dean,
Does this handle rollup aggregates along with the time series data ?
I had a quick look at the links and could not see anything.
Cheers
Aaron
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmorton
http://www.thelastpickle.com
On
so I am just wondering if this means the hinted handoffs are also updated to
reflect the new Cassandra node uuid.
Without checking the code I would guess not.
Because it would involve a potentially large read / write / delete to create a
new row with the same data. And Hinted Handoff is an
Hi Arthur,
This is actually for a column in a counter column family, i.e.
CounterColumnType. Will check out that thread though, thanks.
Best,
Josh
--
Josh Dzielak
VP Engineering • Keen IO
Twitter • @dzello (https://twitter.com/dzello)
Mobile • 773-540-5264
On Monday, June 24, 2013 at
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