)
at
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
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 lolitus...@gmail.com wrote:
On 10/30/2013 02:06 AM, Daning Wang wrote
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
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 sylv...@datastax.comwrote:
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.
Technically
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 comom...@gmail.com wrote:
I am seeing the similar behavior, in my case I
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
this before, please share some light,
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
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 owenzhang1...@gmail.com wrote:
num_tokens is only used
#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 dan...@netseer.com
Thanks Aaron and Manu.
Since we are using 1.1, there is no num_taken parameter. when I upgrade
to 1.2
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 morton aa
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 4, 2013 at 9
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
the
num_token
http://www.datastax.com/docs/1.2/install/upgrading
Is there other doc about this upgrade path?
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
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
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 Jevdokimov
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 aa...@thelastpickle.comwrote:
Looks like this https://issues.apache.org
)
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
Developer
@aaronmorton
http://www.thelastpickle.com
On 10/04/2012, at 8:08 AM, Daning Wang wrote:
Thanks Aaron! Here is the exception, is that the timeout between nodes?
any parameter I can change to reduce timeout?
me.prettyprint.hector.api.exceptions.HectorTransportException
://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 other node, but I want to
reduce the number of timeouts.
any hector parameter I should change to reduce
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
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 aa...@thelastpickle.comwrote:
Can you go to those nodes and run describe cluster ? Also check the logs
on the machines that are marked as UNREACHABLE .
A node
:113)
at
org.apache.cassandra.db.ReadResponseSerializer.deserialize(ReadResponse.java:82)
at
org.apache.cassandra.service.AbstractRowResolver.preprocess(AbstractRowResolver.java:64)
Daning
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% 141784319550391026443072753096570088105
Daning
On Thu, Mar 22, 2012
)
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
and we are on 0.8.6.
On Wed, Mar 21, 2012 at 10:24 AM, Daning Wang dan...@netseer.com 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] 2012-03-21 04:16:30,482
. 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
in advance,
Daning
0
REQUEST_RESPONSE 0
Thanks you 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 mohitanch...@gmail.comwrote:
Are all your nodes equally balanced in terms of read requests
11g *S 66.9 65.5 338:02.72 java
Thank you in advance,
Daning
this? Your help is much appreciated.
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 estimate
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
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
Freelance
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
@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 to 1 day to see what
will happen.
Is there a way to purge tombstones at anytime? because if tombstones affect
performance, we want them
,
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 Cassandra
GCInspector.java (line
122) GC for ParNew: 534 ms for 1 collections, 3308763856 used; max is
8015314944
Thanks in advance.
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 pretty
Thank you in advance.
Daning
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 permissions
problems
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
data to all 4
nodes, that could avoid hot spot, right?
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
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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