e).
I will proceed with rebuilding nodes on new DC.
Thanks,
Vijay
On 5 April 2016 at 18:56, Alain RODRIGUEZ wrote:
> Hi Vijay.
>
> After completing step 7.a (which is altering keyspace with desired
>> replication factor for new DC) data automatically starts syncing from
>>
es in both DC's and I am using
GossipingPropertyFileSnitch.
Regards,
Vijay
: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but
class was expected
Thanks,
Vijay
FYI,
Not sure about this particular problem,
https://github.com/Vijay2win/flume-cassandra-sink supports latest flume
version, if you want to try it out.
Regards,
On Sun, Jan 27, 2013 at 8:05 PM, Sri Ramya wrote:
> hi,
>
> I am storing flume events in to cassandra by using simpleCassandraSink
Just FYI,
For one of the projects, i got around the NTP Drift problem by always
reading more than i need,
For example i want to read all the messages before x seconds then i would
query cassandra for (x seconds + 500ms) then filter the duplicates in the
client.
Yes it does more network and yes cli
Hi Manu,
Glad that you have the issue resolved.
If i understand the issue correctly
Your cassandra installation had RandomParitioner but the bulk loader
configuration (cassandra.yaml) had Murmur3Partitioner?
By fixing the cassandra.yaml for the bulk loader the issue got resolved?
If not then
Yes,
If you are using 1.1 take a look at:
dclocal_read_repair_chance
and
read_repair_chance
CF settings.
Regards,
On Sun, Sep 16, 2012 at 5:03 PM, Raj N wrote:
> Hi,
>I have a 2 DC setup(DC1:3, DC2:3). All reads and writes are at
> LOCAL_QUORUM. The question is if I do reads at LOCAL_
You might want to show us the GC log's... if there are promotion failures,
count on the objects which you can get by inspecting the heapdumps etc, I
am kind of assuming stuff :)
Regards,
On Thu, Jun 28, 2012 at 11:01 PM, Gurpreet Singh
wrote:
> Vijay,
> Thanks for the suggestion
to hold all
the objects. (If you are using the visualVM try to see the object counts).
Regards,
On Thu, Jun 28, 2012 at 3:40 PM, Gurpreet Singh wrote:
> Vijay,
> I am running into an issue right now, not sure if its related to this one.
>
> My cassandra 1.1 was running fine for a we
in 1.1 we dont calculate the Key size accurately, hence we have the fix in
https://issues.apache.org/jira/browse/CASSANDRA-4315
Regards,
On Thu, Jun 28, 2012 at 11:25 AM, Gurpreet Singh
wrote:
> anyone have an explanation for this?
> This kinda screws up memory calculations.
>
> /G
>
> On Mon
Can you attach the cassandra logs? How was it restored? Priam chunks and
compresses before uploading it to S3 and when you restore you have to go
thought Priam to restore...
Regards,
On Thu, May 24, 2012 at 3:58 AM, Jose Flexa wrote:
> Hi all,
>
> Having issues with cassandra 1.0.8 on AWS EC
I would rather set the Keyspace setting min_compaction_threshold
and max_compaction_threshold to be a higher number and once i am ready i
will put the value back... This way i dont need to restart.
Having said that why not set the compaction throughput to 1 (low enough to
not have contention) and c
The incremental backups are generated when the flush is complete (Only
during the flush), If the node crash before the flush completes then the
commit logs in the local node's backup for the data in memory.
It wouldn't help to copy the Commit log across because they are not
immutable (They are recy
opped Mutations/Messages. I
> do see HintedHandoff messages.
>
> Bill
>
>
> On Tue, May 8, 2012 at 11:15 PM, Vijay wrote:
>
>> What is the version you are using? is it Multi DC setup? Are you seeing a
>> lot of dropped Mutations/Messages? Are the nodes going
What is the version you are using? is it Multi DC setup? Are you seeing a
lot of dropped Mutations/Messages? Are the nodes going up and down all the
time while the repair is running?
Regards,
On Tue, May 8, 2012 at 2:05 PM, Bill Au wrote:
> There are no error message in my log.
>
> I ended u
Can you send us the stack trace which you can find in the hs_err_pid*.log?
is the system memory all used up (free)? any errors in the logs just before
the crash?
Regards,
On Mon, Mar 26, 2012 at 12:35 AM, Maciej Miklas
wrote:
> I have row cache - it's about 20GB big in this case.
> The proble
Can you check if the ports are open and you are able to communicate?
UNKNOWN-DC is printed when it is not gossiping with the other node.
I would check the security group settings and verify if the telnet to the
targe port is working as expected.
Regards,
On Thu, Mar 8, 2012 at 11:41 AM, Todd N
Fixing the CC list
Regards,
On Tue, Jan 31, 2012 at 5:40 PM, Vijay wrote:
> http://techblog.netflix.com/2012/01/announcing-astyanax.html
> *
> *
> *What is Astyanax?*
> Astyanax is a Java Cassandra client. It borrows many concepts from Hector
> but diverges in t
http://techblog.netflix.com/2012/01/announcing-astyanax.html
*
*
*What is Astyanax?*
Astyanax is a Java Cassandra client. It borrows many concepts from Hector
but diverges in the connection pool implementation as well as the client
API. One of the main design considerations was to provide a clean
a
+ I would also check the GC settings :) and full gc events in the logs.
Regards,
On Wed, Jan 25, 2012 at 9:52 AM, aaron morton wrote:
> Am I missing data here?
>
> Yes, but you can repair it with nodetool.
>
> Is this means that my cluster is too loaded?
>
> yes.
>
> http://spyced.
I had the following writeup when i did the KS and TS creation... Hope this
helps
*Step 1:* Download your Organisation Cert/Cert Chain/Generate one.
*Step 2:* Login to any of one machine do the following to create p12
# openssl pkcs12 -export -in cassandra-app.cert -inkey cassandra-app.key
-certf
http://www.datastax.com/docs/0.8/install/install_ami
Image is the best way to go find a public AMI for 1.0
Are there any known issues when running C* on EC2?
- Not that i know of but we prefer Ephimeral drives rather than EBS
when using local storage on EC2 since local storage is gone at that poi
You can add a DNS entry with multiple IP's or something like a elastic ip
which will keep switching between the active machines. or you can also
write your custom seed provider class. Not sure if you will get a quorum
when there dev's are on vacation :)
Regards,
On Thu, Dec 8, 2011 at 11:05 AM
In addition to the below i would also think of rebooting one at a time,
just to be safe... folks in my corp are seeing the reboot fail because of
EBS or S3 dependencies while booting the image.
Regards,
On Thu, Dec 8, 2011 at 3:04 AM, Peter Sanford
wrote:
> Just rebooting a machine with ephem
My wish list:
1) Conditional updates: if a column has a value then put column in the
column family atomically else fail.
2) getAndSet: on counters: a separate API
3) Revert the count when client disconnects or receives a exception (so
they can safely retry).
4) Something like a freeze API for upda
https://issues.apache.org/jira/browse/THRIFT-106 seems to be the right way
to go but the cassandra server needs to support too which we might want
to add
Regards,
On Thu, Aug 11, 2011 at 2:54 PM, Chris Marino wrote:
> Hello, is there any consensus on how to secure client/cluster
> co
intend
to make it complicated i thought the operations part is what you have to be
worried about... (Change the Security group in both the regions to allow the
Public IP's)
Regards,
On Fri, Jul 29, 2011 at 4:37 PM, Chris Marino wrote:
> Thanks Vijay, that helps a lot.
>
> FY
"So, my question is: If we use the EC2 Snitch patch to set up across
regions, will the instance's private IP/interface *ever* be used? Or will
all traffic always go in and out of the public interface?? Using the public
interface is slower and more expensive that the private interface. "
If you use
How about GC logs, what are your pause times? JVM settings might help
If you are not sure how to enable GC logs check cassandra.yaml look
for application pause times. it is highly recommended not to swap -- include
JNA jar.
Regards,
On Thu, Jul 14, 2011 at 1:42 AM, Donna Li wrote:
> All
Use describe keyspace and see the settings are right.
Check the logs on all the servers, Make sure you dont see errors... Check
JNA jar in all the servers.
Regards,
On Wed, Jul 13, 2011 at 1:29 PM, Raj N wrote:
> How do I ensure it is indeed using the SerializingCacheProvider.
>
> Thanks
> -
You might want to watch https://issues.apache.org/jira/browse/CASSANDRA-47
Regards,
On Tue, Jun 21, 2011 at 5:14 AM, Timo Nentwig wrote:
> Hi!
>
> Just wondering why this doesn't already exist: wouldn't it make sense to
> have
> decorating data types that compress (gzip, snappy) other data ty
only assume for now that "the ring" referred to is the "local" ring
> of the first data center.
>
>
>
> On 6/15/2011 5:51 PM, Vijay wrote:
>
> No it wont it will assume you are doing the right thing...
>
> Regards,
>
>
>
>
> On Wed, J
No it wont it will assume you are doing the right thing...
Regards,
On Wed, Jun 15, 2011 at 2:34 PM, AJ wrote:
> Vijay, thank you for your thoughtful reply. Will Cass complain if I don't
> setup my tokens like in the examples?
>
>
> On 6/15/2011 2:41 PM, Vijay wrot
1 : token 8..
DC2 Node 1 : token 7..
Regards,
On Wed, Jun 15, 2011 at 12:28 PM, AJ wrote:
> On 6/15/2011 12:14 PM, Vijay wrote:
>
> Correction
>
> "The problem in the above approach is you have 2 nodes between 12 to 4 in
> DC1 but from 4 to 12 you just have 1&
Regards,
On Wed, Jun 15, 2011 at 11:10 AM, Vijay wrote:
> The problem in the above approach is you have 2 nodes between 12 to 4 in
> DC1 but from 4 to 12 you just have 1 (Which will cause uneven
> distribution of data the node)
> It is easier to think of the DCs as ring and spl
any drawbacks to this?
>
>
>
> On 6/14/2011 6:10 PM, Vijay wrote:
>
> Yes... Thats right... If you are trying to say the below...
>
> DC1
> Node1 Owns 50%
>
> (Ranges 8..4 -> 8..5 & 8..5 -> 0)
>
> Node2 Owns 50%
>
> (Ranges 0 -> 1 & 1
Yes... Thats right... If you are trying to say the below...
DC1
Node1 Owns 50%
(Ranges 8..4 -> 8..5 & 8..5 -> 0)
Node2 Owns 50%
(Ranges 0 -> 1 & 1 -> 8..4)
DC2
Node1 Owns 50%
(Ranges 8..5 -> 0 & 0 -> 1)
Node2 Owns 50%
(Ranges 1 -> 8..4 & 8..4 -> 8..5)
Regards,
On Tue, Jun 14, 2011 a
We are using this patch in our multi-region testing... yes this approach is
going to be integrated into
https://issues.apache.org/jira/browse/CASSANDRA-2491 once it is committed
(you might want to wait for that). Yes this fix the Amazon infrastructure
problems and it will automatically detect the D
We are planning to use EIP's +
https://issues.apache.org/jira/browse/CASSANDRA-2452 for AWS multi region
deployment.
Regards,
On Thu, May 5, 2011 at 5:01 PM, aaron morton wrote:
> There have been some recent discussions about different EC2 deployments,
> may be be exactly what you are looking
Are you saying you dont like the idea of the co-ordinator node being in the
same ring? if yes have you looked at the cassandra "fat client" in contrib?
Regards,
On Fri, Mar 18, 2011 at 6:55 PM, Jason Harvey wrote:
> Hola everyone,
>
> I have been considering making a few nodes only manage 1
"Cassandra requires the schema to be defined before the database starts,
MongoDB can have any schema at run-time just like a normal database."
This is changing in 0.7
Regards,
On Wed, May 12, 2010 at 7:25 PM, Jonathan Shook wrote:
> You can choose to have keys ordered by using an
> OrderPre
But the
> results will not be ordered?
>
> Please answer one of the following:
>
> True True
> True False
> False False
>
> Explain?
>
> Thanks!
>
>
> On Sun, May 9, 2010 at 8:27 PM, Vijay wrote:
>
>> True, The Range slice support was enabled in R
True, The Range slice support was enabled in Random Partitioner for the
hadoop support.
Random partitioner actually hash the Key and those keys are sorted so we
cannot have the actual key in order (Hope this doesnt confuse you)...
Regards,
On Sun, May 9, 2010 at 12:00 AM, David Boxenhorn
Probably only me... but we have seen a higher latencies when using VMWare,
also i think it depends on the H/W and VM configuration I have to figure
out why (You might also try to mix the application's which runs on the
hw) i think there are people who run it on Amazons EC.
Regards,
On
I would rather be interested in Tree type structure where supercolumns have
supercolumns in it. you dont need to compare all the columns to find a
set of columns and will also reduce the bytes transfered for separator, at
least string concatenation (Or something like that) for read and write
co
What I did for one of our project was similar Use super col to strore
files and dir metadata use another row(Key UUID) to store the dir
contents (Files and subdirectory). we used UUID instead of paths because
there will be rename or move store the small files in cassandra
We used I
Yes a super column can only have columns in it.
Regards,
On Wed, Apr 14, 2010 at 10:28 PM, Christian Torres wrote:
> I'm defining a ColumnFamily (Table) type Super, It's posible to have a
> SuperColumn inside another SuperColumn or SuperColumns can only have normal
> columns?
>
> --
> Christi
>> This assumes the key is always sorted. Is it true?
yes, keys are always sorted within a column family,
>> How do you translate the starting row number to a string key?
handled via client, you might need to store the last key which was returned
and start from there to fetch the next set Fir
What version do you use? i think that bug was fixed in .6
https://issues.apache.org/jira/browse/CASSANDRA-703
Regards,
On Sat, Apr 3, 2010 at 5:27 AM, Arash Bazrafshan wrote:
> ello.
>
> A bug occurs for me when working with Cassandra.
>
> With this e-mail I intend to show what I do to
+1 for renaming the S Column/Column as a atomic operation :)
Regards,
On Thu, Mar 18, 2010 at 9:50 AM, Jonathan Ellis wrote:
> -1 on adding a special case for this.
>
> 2010/3/18 Ted Zlatanov :
> > I find it useful in one particular schema to have SuperColumns with
> > specific names and ren
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