org.apache.cassandra.service.StorageService.shutdownClientServers(StorageService.java:362)
at
org.apache.cassandra.service.StorageService.access$000(StorageService.java:88)
at
org.apache.cassandra.service.StorageService$1.runMayThrow(StorageService.java:513)
Daning
?
Thanks,
Daning
lhost move
168755834953206242653616795390304335560
This node has more than one token and cannot be moved thusly
We don't want to use cassandra-shuffle, because it put too much load on the
server. we just want to move some tokens.
Thanks,
Daning
Thanks. actually I forgot to mention it is multi-center environment and we
have dynamic snitch disabled. because we saw some performance impact on the
multi-center environment.
On Wed, Oct 30, 2013 at 11:12 AM, Piavlo wrote:
> On 10/30/2013 02:06 AM, Daning Wang wrote:
>
>> We
hector on client side, and clients are connecting to all the
servers, we checked open connections on each server, the numbers are about
same.
What could cause this problem, how to debug this?
Thanks in advance,
Daning
We noticed that key cache could not be fully populated, we have set the key
cache size to 1024M.
key_cache_size_in_mb: 1024
But none of nodes showed the cache capacity is 1G, we have recently
upgraded to 1.2.5, could be an issue in that version?
Token: (invoke with -T/--tokens to see
How does dynamic snitch work with EC2MultiRegionSnitch? Can dynamic routing
only happen in one data center? We don't wan to have the requests routed to
another center even nodes are idle in other side since the network could be
slow.
Thanks in advance,
Daning
other DC is shutdown.
Thanks,
Daning
On Wed, Jun 12, 2013 at 7:48 AM, Sylvain Lebresne wrote:
>
> Is there something special of this kind regarding counters over multiDC ?
>>
>
> No. Counters behave exactly as other writes as far the consistency level
> is concerned.
>
ption replicate_on_write on table. If you turn that off for
counter might have better performance. but you are on high risk to lose
data and create inconsistency. I did not try this option.
Daning
On Sat, Jun 8, 2013 at 6:53 AM, srmore wrote:
> I am seeing the similar behavior, in my case I have 2
-- Address Load Tokens Owns (effective) Host ID
Rack
DN xx.xx.xx.19958.39 GB 256 50.0%
6954754a-e9df-4b3c-aca7-146b938515d8 rac1
DN xx.xx.xx..61 33.79 GB 256 50.0%
91b8d510-966a-4f2d-a666-d7edbe986a1c rac1
Thank you in advance,
Daning
We have multi-center deployment. data from some tables we don't want to
sync to other center. could we set replication factor to 0 on other data
center? what is the best to way for not syncing some data in a cluster?
Thanks in advance,
Daning
dress? or other solutions? Is that easy to
write a new Snitch for this?
Thanks,
Daning
On Thu, May 2, 2013 at 2:31 PM, aaron morton wrote:
> Look at the broadcast_address in the yaml file
> Cheers
> -
> Aaron Morton
> Freelance Cassandra Consultant
> New Z
know if there is other idea.
Thanks in advance,
Daning
Hi Guys,
What is the cassandra solution for remote backup besides multi-center? I
hope I can do incremental backup to remote database center.
Thanks,
Daning
before, please share some light,
Thanks in advance,
Daning
) Applying mutation
DEBUG [MutationStage:602] 2013-03-15 14:32:33,643
RowMutationVerbHandler.java (line 40) Applying mutation
DEBUG [MutationStage:602] 2013-03-15 14:32:33,643
AbstractSimplePerColumnSecondaryIndex.java (line 118) applying index row
us.countryproducts.safestchina.com
Thanks,
Daning
node".
>
> So I would let "#num_tokens" commented in the cassandra.yaml and would
> set the initial_token at the same value than in the pre-C*1.2.x-uprage
> configuration.
>
> Alain
>
>
> 2013/2/14 Daning Wang
>
>> Thanks Aaron and Manu.
>>
>> Si
Thanks Aaron and Manu.
Since we are using 1.1, there is no num_taken parameter. when I upgrade to
1.2, should I set num_token=1 to start up, or I can set to other numbers?
Daning
On Tue, Feb 12, 2013 at 3:45 PM, Manu Zhang wrote:
> num_tokens is only used at bootstrap
>
> I t
No, I did not run shuffle since the upgrade was not successful.
what do you mean "reverting the changes to num_tokens and inital_token"?
set num_tokens=1? initial_token should be ignored since it is not
bootstrap. right?
Thanks,
Daning
On Tue, Feb 12, 2013 at 10:52 AM, aaron mo
373 rack1
UN 10.210.101.12045.43 GB 256 0.4%
0fd912fb-3187-462b-8c8a-7d223751b649 rack1
UN 10.210.101.11127.08 GB 256 0.4%
bd4c37bc-07dd-488b-bfab-e74e32c26f6e rack1
What was wrong? please help. I could provide more information if you need.
Thanks,
Daning
On Mon, Feb
We have 8 nodes cluster in Casandra 1.1.0, with replication factor is 3. We
found that when you just insert data, not only WriteCount increases, the
ReadCount also increases.
How could this happen? I am under the impression that readCount only counts
the reads from client.
Thanks,
Daning
hange the
num_token
http://www.datastax.com/docs/1.2/install/upgrading
Is there other doc about this upgrade path?
Thanks,
Daning
ou are not using QUOURM / QUOURM you maybe getting inconsistent results
> now.
>
> Cheers
>
> -
> Aaron Morton
> Freelance Cassandra Developer
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 29/01/2013, at 9:51 AM,
cql.cassandra.ttypes.AuthenticationException:
AuthenticationException(why="User doesn't exist - create it with
CREATE USER query first")
What does "create it with CREATE USER query first" mean?
I put debug information in SimpleAuthenticator class, that showed
authentication is passed in the authenticate() method.
Thanks,
Daning
I add a new node to ring(version 1.1.6), after more than 30 hours, it is
still in the 'Joining' state
Address DC RackStatus State Load
Effective-Ownership Token
141784319550391026443072753096570088105
10.28.78.123datacenter1 rack1 Up Normal
Thanks guys.
Aaron, I am confused about this. from wiki
http://wiki.apache.org/cassandra/ReadRepair, looks for any consistency
level. Read Repair will be done either before or after responding data.
>Read Repair does not run at CL ONE
Daning
On Wed, May 23, 2012 at 3:51 AM, Viktor Jevdoki
to go to another hop to get data if RF=4, but it would do
more work on read repair in the background.
Can you share some insights about this?
Thanks in advance,
Daning
Thanks Aaron! We will upgrade to 1.0.9.
Just curious, you said "removing the HintedHandoff files from data/system",
what do the HintedHandoff files look like?
Thanks,
Daning
On Wed, May 16, 2012 at 2:32 AM, aaron morton wrote:
> Looks like this https://issues.apache.org/jira/bro
ffManager.java:344)
at
org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpoint(HintedHandOffManager.java:248)
at
org.apache.cassandra.db.HintedHandOffManager.access$200(HintedHandOffManager.java:84)
at
org.apache.cassandra.db.HintedHandOffManager$3.runMayThrow(HintedHandOffManager.java:418)
Thanks,
Daning
gt; 0 0
>
> Looks fine.
>
> Hope that helps.
>
>
> -
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 10/04/2012, at 8:08 AM, Daning Wan
gt; Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 6/04/2012, at 5:30 AM, Daning Wang wrote:
>
> > Hi all,
> >
> > We are using Hector and ofter we see lots of timeout exception in the
> log, I know that the hector can failover to othe
Hi all,
We are using Hector and ofter we see lots of timeout exception in the log,
I know that the hector can failover to other node, but I want to reduce the
number of timeouts.
any hector parameter I should change to reduce this error?
also, on the server side, any kind of tunning need to do f
We upgraded to 1.0.8, and looks the problem is gone.
Thanks for your help,
Daning
On Sun, Mar 25, 2012 at 9:54 AM, aaron morton wrote:
> Can you go to those nodes and run describe cluster ? Also check the logs
> on the machines that are marked as UNREACHABLE .
>
> A node will
10.28.20.200datacenter1 rack1 Up Normal 5.51 GB
16.67% 85070591730234615865843651857942052863
10.123.83.114 datacenter1 rack1 Up Normal 5.49 GB
16.67% 113427455640312821154458202477256070484
10.240.113.171 datacenter1 rack1 Up Normal 5.43 GB
16.67% 14178
ponse.java:113)
at
org.apache.cassandra.db.ReadResponseSerializer.deserialize(ReadResponse.java:82)
at
org.apache.cassandra.service.AbstractRowResolver.preprocess(AbstractRowResolver.java:64)
Daning
and we are on 0.8.6.
On Wed, Mar 21, 2012 at 10:24 AM, Daning Wang wrote:
> Hi All,
>
>
> We got lots of Exception in the log, and later the server crashed. any
> idea what is happening and how to fix it?
>
> ERROR [RequestResponseStage:4] 20
at
org.apache.cassandra.service.RowRepairResolver.resolve(RowRepairResolver.java:85)
at
org.apache.cassandra.service.AsyncRepairCallback$1.runMayThrow(AsyncRepairCallback.java:54)
at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
... 3 more
Thank you in advance,
Daning
hosts every xx seconds and recover connection.
>
> Regards,
> Maciej
>
>
> On Mon, Mar 5, 2012 at 8:13 PM, Daning Wang wrote:
>
>> I just got this error ": All host pools marked down. Retry burden pushed
>> out to client." in a few clients recently, client co
r
was busy. But I think client should recover after server load was down.
Any bug reported about this? I did search but could not find one.
Thanks,
Daning
Thank you guys. very appreciated.
How about just pulling the slow machines out of cluster? I think the most
of reads should already from fast machine right now because of dynamic
snitch. so removing two machines should not add much loads on the remaining
nodes.
How do you think?
Thanks,
Daning
hanks in advance,
Daning
Thanks for your reply.
Nodes are equally balanced. and it is RandomPartitioner. I think that
machine is slower, Are you saying it is IO issue?
Daning
On Fri, Jan 6, 2012 at 10:25 AM, Mohit Anchlia wrote:
> Are all your nodes equally balanced in terms of read requests? Are you
>
ATION 0
REQUEST_RESPONSE 0
Thanks you in advance.
Daning
? Your help is much appreciated.
Daning
11g *S 66.9 65.5 338:02.72 java
Thank you in advance,
Daning
Sylvain - We have similar problem but the discrepancy is not that big.
Do we have to do major compaction to fix it? We did not do 'nodetool
compact', just did repair regularly, which triggers minor compaction.
Thanks,
Daning
On 10/26/2011 03:23 AM, Sylvain Lebresne wrote:
The es
meter
DoConsistencyChecksBoolean(http://www.datastax.com/dev/blog/whats-new-cassandra-066)
to disable read repair, what is the proper way to do it?
I am on 0.8.6.
Thank you in advance,
Daning
Thanks. Do you have plan to improve this? I think tombstone should be
separated with live data since it serves different purpose, built in
separate SSTable or indexed differently. It is pretty costly to do
filtering while reading.
Daning
On 10/04/2011 01:34 PM, aaron morton wrote:
I would
nding deleted data will be
synced back. In this case my data will be processed twice and it will
not be a big deal to me.
Thanks,
Daning
On 10/04/2011 01:27 AM, aaron morton wrote:
Yes that's the slice query skipping past the tombstone columns.
Cheers
-
Aaron Morton
gt; Cheers
>
>
> -
> Aaron Morton
> Freelance Cassandra Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 30/09/2011, at 3:27 AM, Daning Wang wrote:
>
> Jonathan/Aaron,
>
> Thank you guy's reply, I will change GCGracePeriod
an do repair first to make sure the
consistency before purging.
Thanks,
Daning
On Wed, Sep 28, 2011 at 5:22 PM, aaron morton wrote:
> if I had to guess I would say it was spending time handling tombstones. If
> you see it happen again, and are interested, turn the logging up to DEBUG
>
6.
Thanks,
Daning
Thanks Peter. I saw cpu was shooting much higher. I am not sure if
frequent GCs are caused by improperly sized generations. I'd like to get
some tunning tips, or good document about Cassandra tuning.
Daning
On 09/22/2011 12:23 PM, Peter Schuller wrote:
We are testing Cassandra with p
GCInspector.java (line
122) GC for ParNew: 534 ms for 1 collections, 3308763856 used; max is
8015314944
Thanks in advance.
Daning
Thank you guys. I don't think have permission issue or out of space.
might be ulimit set to low(1024), we will change ulimit -Hn and unlimit
-Sn to see if that could solve the problem.
Daning
On 09/22/2011 01:12 AM, aaron morton wrote:
It's in the yaml file…
# directories where
Thanks Jonathan. where is the data directory configured? since I did not
any permission problem.
Daning
On 09/21/2011 11:01 AM, Jonathan Ellis wrote:
Means Cassandra couldn't create an empty file in the data directory
designating a sstable as compacted. I'd look for permission
Thank you in advance.
Daning
data to all 4
nodes, that could avoid hot spot, right?
Thank you in advance,
Daning
for other designs. I want to know if anybody has implemented a large
ordered queue successfully.
Let me know if you have suggestion,
Thank you in advance.
Daning
Avg(ms) Min Max Std
Dev 95th Count
(PeriodicalLog.java:221) INFO Thread-53040 2011-09-09 13:24:03,291
(
We have tried to set log4j like this but that does not work,
log4j.logger.com.ecyrd.speed4j.log.PeriodicalLog=ERROR
Thanks,
Daning
query is not supported, and what's the good
work around for it? At this moment my workaound is to create a column
which is exactly same as key.
Thanks,
Daning
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