I am delighted to share with you that we, the Apache Cassandra community,
in light of our success at last year at last year's conference, have been
given a three day track at this year's ApacheCon in New Orleans, LA, USA
[0].
The goal of this track is simple: we are going to get together to talk
a
Hello everyone,
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invitation to take the 2020 ASF Community Survey. Please take 15 minutes to
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Hi Folks,
The schedule is up for ApacheCon 2019, we could not be happier with the
Cassandra track we were able to put together.
https://www.apachecon.com/acna19/schedule.html
Huge thanks again to everyone that submitted talks. We had 3x the number of
submissions of any other project specific trac
Hi Folks,
I am delighted to share with you that we, the Apache Cassandra
community, have been given a two day track at this year's ApacheCon
North America.
The goal of this track is simple: we are going to get together to talk
about Apache Cassandra. As such, this will be the ideal place to
networ
Are you using queries with a large number of arguments to an IN clause
on a partition key? If so, the coordinator has to:
- hold open the client request
- unwind the IN clause into individual statements
- scatter/gathering those statements around the cluster (each at the
requested consistency level
At this point, query tracing is easier to do from the driver side.
Docs for python and java:
http://datastax.github.io/python-driver/api/cassandra/query.html#
https://github.com/datastax/java-driver/tree/3.x/manual/logging#logging-query-latencies
This has been completely redone in 4.0. For details
When it's ready :)
In all seriousness, the past two blog posts include some discussion on
our motivations and current goals with regard to 4.0:
http://cassandra.apache.org/blog/
On Wed, Oct 24, 2018 at 4:49 AM Abdul Patel wrote:
>
> Hi all,
>
> Any idea when 4.0 is planned to release?
--
We'll start publishing snapshot builds in the near future to ease
testing (support for such just added via CASSANDRA-12704).
On Sun, Sep 30, 2018 at 5:11 AM James Carman wrote:
>
> Okay, cool. So, 4.0.0-SNAPSHOT doesn’t have Java 11 support quite yet? No
> big deal. Just trying to get ahead of
> We only increased commitlog_total_space_in_mb so that Cassandra fully uses
> the dedicated disk, but that may be an error?
> The default value for this setting is (per the documentation):
>
> The default value is the smaller of 8192, and 1/4 of the total space of
> the commitlog volume.
>
>
> I have a cluster on v3.0.11 I am planning to upgrade this to 3.10.
> Is rolling back the binaries a viable solution?
What's the goal with moving form 3.0 to 3.x?
Also, our latest release in 3.x is 3.11.3 and has a couple of
important bug fixes over 3.10 (which is a bit dated at this point).
--
You can tell how psyched we are about it because we cross posted!
Seriously though - this is by the community for the community, so any
ideas - please send them along.
On Wed, Aug 8, 2018 at 1:53 PM, sankalp kohli wrote:
> Hi,
> Apache Cassandra Blog is now live. Check out the first blog po
Hi folks,
We just added a blog section to our site, with a post detailing
performance improvements of streaming coming in 4.0:
http://cassandra.apache.org/blog/2018/08/07/faster_streaming_in_cassandra.html
I think it's a good indicator of what we are going for that our first
author is not a commit
Due to how Spring Data binding works, you have to write queries
explicitly to use the "...FROM keyspace.table ..." in either the
template-method classes (CqlTemplate, etc) or via @Query annontations
to avoid the 'use keyspace' overhead. For example, a Repository
implementation for a User class (do
CVE-2018-8016 describes an issue with the default configuration of
Apache Cassandra releases 3.8 through 3.11.1 which binds an
unauthenticated JMX/RMI interface to all network interfaces allowing
attackers to execute arbitrary Java code via an RMI request. This
issue is a regression of the previous
e_date,
> for example, to reduce the partition size while not being too granular.
>
>
> On Tue, 17 Apr 2018, 22:17 Nate McCall, wrote:
>
>> Your table design will work fine as you have appropriately bucketed by an
>> integer-based 'create_date' field.
>>
e city,Luoyu Road,Wuhan,HuBei
>
> Mob: +86 13797007811|Tel: + 86 27 5024 2516
>
>
>
> *发件人:* Nate McCall
> *发送时间:* 2018年4月17日 7:12
> *收件人:* Cassandra Users
> *主题:* Re: Time serial column family design
>
>
>
>
>
> Select * from test where vin =“ZD41578123DSAF
>
>
> Select * from test where vin =“ZD41578123DSAFWE12313” and create_date in
> (20180416, 20180415, 20180414, 20180413, 20180412….);
>
> But this cause the cql query is very long,and I don’t know whether there
> is limitation for the length of the cql.
>
> Please give me some advice,t
>60535
>60536
>60548
>
> --- Enclosed is a copy of the bounce message I received.
>
> Return-Path: <>
> Received: (qmail 8848 invoked for bounce); 27 Mar 2018 14:22:11 -
> Date: 27 Mar 2018 14:22:11 -0000
> From: mailer-dae...@apache.org
> To: user-return-605...@cassandra.apache.org
> Subject: failure notice
>
>
>
>
> -
> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: user-h...@cassandra.apache.org
>
>
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
>
>
> - Heap size is set to 8GB
> - Using G1GC
> - I tried moving the memtable out of the heap. It helped but I still got
> an OOM last night
> - Concurrent compactors is set to 1 but it still happens and also tried
> setting throughput between 16 and 128, no changes.
>
That heap size is way to sm
is forsaken cluster is being autoculled in
> AWS.
>
> Is this possible? It is not marked volatile in the Config of the source
> code, so I doubt it.
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
> Hi,
> We got a requirement to migrate only one keyspace data from one cluster to
> other cluster. And we no longer need the old cluster anymore. Can you
> suggest what are the best possible ways we can achieve it.
>
> Regards
> Goutham Reddy
>
Temporarily treat the new cluster as a new datacent
> We do archiving data in Order to make assumptions on it in future. So, yes
> we expect to grow continously. In the mean time I learned to go for
> predictable grow per partition rather than unpredictable large
> partitioning. So today we are growing 250.000.000 Records per Day going
> into a sing
vice holding:
/var/lib/cassandra/hints?
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
>
>
> Another was the crazy idea I started with of setting min_index_interval to
> 1. My guess was that this would cause it to read all index entries, and
> effectively have them all cached permanently. And it would read them
> straight out of the SSTables on every restart. Would this work? Other t
> Thanks a lot for that explanation Jeff!! I am trying to see if there is
> any JIRA ticket that talks about incorporating LWT in scenarios you
> mentioned?
>
https://issues.apache.org/jira/browse/CASSANDRA-10699
>
> We use Oracle jdk1.8.0_152 on all nodes and as I understand oracle use a
> dot in the protocol name (TLSv1.2) and I use the same protocol name and
> cipher names in the 3.0.14 nodes and the one I try to upgrade to 3.11.1.
>
I agree with Stefan's assessment and share his confusion. Would you be
ol access instead
of relying on per-node configuration.
--
-----
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
ads
and concurrent_writes back to their defaults.
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
bout pg_bouncer for Postgresql, I am thinking something
> similar to that.
> Have anyone worked in such a project? Can you please share some idea?
>
> Thanks.
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
>
>
> The message in the debug log is
>
> DEBUG [GossipStage:1] 2017-09-21 09:19:52,627 FailureDetector.java:456 -
> Ignoring interval time of 2000275419
>
>
>
Did you truncate the log message? There should be and "for [endpoint]" on
the end which should help you narrow things down to a set of prob
Regardless, if you are not modifying users frequently (with five you most
likely are not), make sure turn the permission cache wyyy up.
In 2.1 that is just: permissions_validity_in_ms (default is 2000 or 2
seconds). Feel free to set it to 1 day or some such. The corresponding
async update para
ot been able to identify what might be the cause for this
> as nothing (at least I could not find anything relevant on the timestamps)
> in the cassandra debug and system logs.
>
> Could you share some insight on this ? What to check and where to start
> from , in order to troubleshoot this.
>
> Thanks !
> Ivan
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
On Sat, Jul 15, 2017 at 6:37 AM, Felipe Esteves <
felipe.este...@b2wdigital.com> wrote:
>
> One point I've noticed, is that Opscenter show "OS: Disk Latency" max with
> high values when the problem occurs, but it doesn't reflect in server
> directly monitoring, in these tools the IO and latency of
You wouldnt have a build file laying around for that, would you?
On Tue, Jul 11, 2017 at 3:23 PM, Nate McCall wrote:
> On Tue, Jul 11, 2017 at 3:20 AM, Avi Kivity wrote:
>
>>
>>
>>
>> [1] https://github.com/avikivity/shardsim
>>
>
> Av
On Tue, Jul 11, 2017 at 3:20 AM, Avi Kivity wrote:
>
>
>
> [1] https://github.com/avikivity/shardsim
>
Avi, that's super handy - thanks for posting.
>
>
> We're running with 128G memory and 30G heap size. Maybe it's good idea
> to increase the commitlog_total_space. On the other hand, even with 8G
> commitlog_total_space, replaying CL after restart takes more than 5
> minutes.
>
> In our case, the actual problem is it's causing lots of read re
> We have CL.TWO.
>
>
>
This was actually the original motivation for CL.TWO and CL.THREE if memory
serves:
https://issues.apache.org/jira/browse/CASSANDRA-2013
>
>
> So, for the quorum, what we really want is that there is one overlap among
>> the nodes in write path and read path. It actually was my assumption for a
>> long time that we need (N/2 + 1) for write and just need (N/2) for read,
>> because it's enough to provide the strong consistency.
>>
>
>
tency.
>
You are write about strong consistency with that calculation, but if I want
to issue a QUORUM read just by itself, I would expect a majority of nodes
to reply. How it was written might be immaterial to my use case of reading
'from a majority.'
--
-
Nate McCa
ell as it has
quite an elegant paradigm for the use case you describe, particularly if
you need to combine batching with streaming. (FYI, their "CassandraIO" is
about to be merged in master:
https://github.com/apache/beam/pull/592#issuecomment-306618338).
--
-
Na
our 3.10 development cluster.
>>
>> we are doing regular repairs with thelastpickle's fork of creaper.
>> sometimes the repair (it is a full repair in that case) hangs because
>> of a stuck validation compaction
>>
>> nodetool compactionstats gives me
>> a1bb45c0-1fc6-11e7-81de-0fb0b3f5a345 Validation bds ad_event
>> 805955242 841258085 bytes 95.80%
>> we have here no more progress for hours
>>
>> nodetool tpstats shows
>> alidationExecutor1 1 16186 0
>>0
>>
>> i checked the logs on the affected node and could not find any
>> suspicious errors.
>>
>> anyone that already had this issue and knows how to cope with that?
>>
>> a restart of the node helps to finish the repair ... but i am not sure
>> whether that somehow breaks the full repair
>>
>> bg,
>> roland
>>
>>
>>
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
To unsubscribe from this list, please send an email to
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Thanks!
On Wed, Apr 12, 2017 at 6:37 AM, Lawrence Turcotte <
lawrence.turco...@gmail.com> wrote:
> UNSUBSCRIBE
>
Hi John,
Please send an email to user-unsubscr...@cassandra.apache.org to
unsubscribe from this list.
On Fri, Apr 7, 2017 at 8:58 AM, John Buczkowski wrote:
> *From:* eugene miretsky [mailto:eugene.miret...@gmail.com]
> *Sent:* Thursday, April 06, 2017 4:36 PM
> *To:* user@cassandra.apache.org
>
On Thu, Mar 23, 2017 at 11:18 AM, Abhishek Kumar Maheshwari <
abhishek.maheshw...@timesinternet.in> wrote:
> JVM config is as below:
>
>
>
> -Xms16G
>
> -Xmx16G
>
> -Xmn3000M
>
>
>
I don't think it is the cause, but you need to remove Xmn when using G1GC.
a after starting scrub.
>
>
>
>
> Thanks
> Pranay.
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
x27;{}' for DCAwareRoundRobinPolicy..."
Make sure those line up with the cluster topology and your expectations.
Actually, in typing that up, it may be more appropriate to move the
conversation over here since this is probably driver specific:
https://groups.google.com/a/lists.datast
On Wed, Mar 22, 2017 at 1:11 PM, Nate McCall wrote:
>
>
> On Wed, Mar 22, 2017 at 12:48 PM, Shannon Carey
> wrote:
> >
> > The cluster is in two DCs, and yes the client is deployed locally to
> each DC.
>
> First off, what is the goal of using ONE instead of LO
limitiations on my hardware
> (iops, disk usage, cpu, ... is fine).
>
> am i missing something? any suggestions how to cope with that?
>
> br//
> roland
>
>
>
>
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
I think you would be better served by using a streaming system like Apache
Flink (http://flink.apache.org) and checkpointing occasionally to
Cassandra.
This is a significant increase in complexity, but you are describing a
real-time streaming use case with the need for watermarking time windows
an
That said, since you have different IO hardware, are you sure the system
configurations (eg. block size, read ahead, etc) are the same on both
machines? Is dstat showing a similar order of magnitude of network traffic
in vs. IO for what you would expect?
--
-----
Nate McCall
Welli
using TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 as the cipher. Any ideas why?
>
> Last error: _ssl.c:492: EOF occurred in violation of protocol")})
> -- Jacob Shadix
>
--
-----
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
sortByProximity(
> DynamicEndpointSnitch.java:152)
> at org.apache.cassandra.service.StorageProxy.getLiveSortedEndpoints(
> StorageProxy.java:1581)
> at org.apache.cassandra.service.StorageProxy.getRangeSlice(
> StorageProxy.java:1739)
>
>
>
> Looking at code, I can’t figure out why things like this would require a
> high CPU and I don’t find any JIRAs relating this as well. So, what can I
> do next to troubleshoot this ?
>
>
>
> Thanks !
>
>
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
ase/6/docs/technotes/guides/securi
>> ty/jsse/JSSERefGuide.html#CreateKeystore
>>
>> However, one difficulty with this approach is whenever I am adding a new
>> node I had to rolling restart all the C* nodes in the cluster, so that the
>> truststore is updated with the
pretty slow from the get go. In my logs
>>> I see a lot of tables getting flushed, which I guess are all of the dirty
>>> column families in the respective commit log segment. Then I seen a whole
>>> bunch of flushes getting queued up. Can I reach a point in
x27;m trying to enable SSL (internode + client).
> But I need to specify the suites but I don't know which ones are
supported by C*..
> Any pointers much appreciated.
> thx
>
> --
>
> -eric ho
>
--
-
Nate McCall
Wellington, NZ
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
provides an excellent description of ECDH:
https://vincent.bernat.im/en/blog/2011-ssl-perfect-forward-secrecy.html#diffie-hellman-with-elliptic-curves
Unless you have a specific requirement, use "TLS_RSA_WITH_AES_256_CBC_SHA."
--
-
Nate McCall
Wellington, N
the rolling restart, it's expected that the nodes in the
> datacenter that had the service restarted, will show as down by the nodes
> in other datacenters that have not restarted the service. This would lead
> to missed writes among various nodes during this procedure.
>
> What wou
r with either:
- the object mapper module:
https://github.com/datastax/java-driver/tree/3.0/manual/object_mapper
- or Achilles: https://github.com/doanduyhai/Achilles
--
-----
Nate McCall
Austin, TX
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
>
> Any Hints (pun intended) on what could cause a few nodes to generate more
> hints than the rest of the cluster?
>
> Regards,
> \EF
>
--
-
Nate McCall
Austin, TX
@zznate
CTO
Apache Cassandra Consulting
http://www.thelastpickle.com
>
> What are my tuning options to have a more gentle repair behaviour? Which
> settings should I look at if I want CPU to stay below 50% for instance. My
> worry is always to impact the read/write performance during times when we
> do anti-entropy repairs.
>
+1 on cassandra_ran
- You can potentially put a lot more pressure on portions of the system
that anticipate upstream throttling
In sum: it's possible, but put something in production first using standard
APIs before you go this deep. This is not the level at which you want to
write your first app against Cassand
vior,
> and/or eliminate unsolicited promotional e-mails (“spam”). If you have any
> concerns about this process, please contact us at *
> *legal.departm...@pdf.com* *.*
--
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Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
es/kubernetes/blob/master/docs/proposals/federation.md
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
>
>
> Rob, can you remember which bug/jira this was? I have not been able to
> find it.
> I'm using 2.1.9.
>
>
https://issues.apache.org/jira/browse/CASSANDRA-7953
Rob may have a different one, but I've something similar from this issue.
Fixed in 2.1.12.
--
-
#x27; in cassandra.yaml (should be 'all'
by default, but worth checking since you are using lz4 on the client)?
- are you using server-to-server encryption ?
You can compare the output of nodetool netstats on the test cluster with
the AWS cluster as well to see if anything sticks out.
--
suspects appreciated.
>
> These are the memtable settings we've configured diff from the defaults
during our testing:
>
> memtable_allocation_type: offheap_objects
> memtable_flush_writers: 8
>
>
> Cheers,
>
> Mike
>
> On Fri, Feb 19, 2016 at 1:46 PM, Nate McCa
gt;>> https://gist.github.com/mheffner/fea80e6e939dd483f94f#file-cassandra-yaml
>>>>>> >>>>
>>>>>> >>>> Like I mentioned we use 8u60 with G1GC and have used many of the
>>>>>> GC
>>>>>> >>>> sett
. Here <http://pastebin.com/kuhBmHXG> is
>> my cassandra.yaml and here <http://pastebin.com/fyXeTfRa> are my JVM
>> args. I realized I neglected to adjust memtable_flush_writers as I was
>> writing this--so I'll get on that. Aside from that, I'm not sure what t
ly use a combination of Grafana
and Riemann to monitor Cassandra internals, the JVM and the OS. Otherwise,
it's guess work.
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
This thread was on the Java-Driver list recently - it may answer some of
your questions:
https://groups.google.com/a/lists.datastax.com/forum/m/#!topic/java-driver-user/-im4eN_yZbA
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apac
ense given it is happening on such a small number of API queries.
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
>
>> Also, as I increase my node count, I technically also have to increase my
>> compaction_throughput which would require a rolling restart across the
>> cluster.
>>
>>
> You can set compaction throughput on each node dynamically via nodetool
> setcompactionthroughput.
>
>
>
Also, the IOPS genera
>
>
> Also, as I increase my node count, I technically also have to increase my
> compaction_throughput which would require a rolling restart across the
> cluster.
>
>
You can set compaction throughput on each node dynamically via nodetool
setcompactionthroughput.
--
-
any issues like this going from 2.0.x to 2.1.x on vanilla C*.
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
ade anything besides Cassandra?
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
start) and change settings serially and in small increments based
on feedback gleaned from monitoring runtimes.
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
ze is determined by
whatever was in the memtable at that time.
--
---------
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
Then it is just 2 minutes after the last node joins.
In other words starting a six node cluster would not be that much faster
than starting a 100 node cluster if each had 3 seeds (I'm pretty sure it
would mostly be network overhead of gossip communication/peer discovery).
--
--
ve an overwrite workload where larger memtables
would be helpful, and if I need to increase my LCS sstable size in order to
allow for that.
>
> -dan
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
long, but readible and has a series of comments that
explain some of the decisions taken and even reference some issues which
have been encountered over the years.
You can change this value if you really want by passing
"cassandra.ring_delay_ms" as a system property at startup.
--
-
vase/7/docs/technotes/guides/security/jsse/ReadDebug.html
--
-----
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
>
>
> If I am selecting a range from the bottom of the partition, does it make
> much of a difference (considering I only use ssd's) if the clustering order
> is ASC or DESC.
>
The only impact is that there is an extra seek to the bottom of the
partition.
<>
> orany of itsparents*) -> client side error
>
> The other clusters perform fine.
>
> Thanks in advance.
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
1]
>>>>> 2015-09-18_23:21:40.80673 at
>>>>> org.apache.cassandra.gms.GossipDigestAck2VerbHandler.doVerb(GossipDigestAck2VerbHandler.java:49)
>>>>> ~[apache-cassandra-2.1.8+git20150804.076b0b1.jar:2.1.8+git20150804.076b0b1]
>>>>> 2015-09-18_23:21:40.80673 at
>>>>> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:62)
>>>>> ~[apache-cassandra-2.1.8+git20150804.076b0b1.jar:2.1.8+git20150804.076b0b1]
>>>>> 2015-09-18_23:21:40.80674 at
>>>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>>>>> ~[na:1.7.0_45]
>>>>> 2015-09-18_23:21:40.80674 at
>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>>>>> ~[na:1.7.0_45]
>>>>> 2015-09-18_23:21:40.80674 at
>>>>> java.lang.Thread.run(Thread.java:744) ~[na:1.7.0_45]
>>>>> 2015-09-18_23:21:40.85812 WARN 23:21:40 Not marking nodes down due to
>>>>> local pause of 10852378435 > 50
>>>>>
>>>>> Any suggestions about how to remove it?
>>>>> Thanks.
>>>>>
>>>>> --
>>>>> Dikang
>>>>>
>>>>>
>>>
>>>
>>> --
>>> Dikang
>>>
>>>
>>
>>
>> --
>> Dikang
>>
>>
>
>
> --
> Dikang
>
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
iorating
>
> Naidu Saladi
>
> ------
> *From:* Nate McCall
> *To:* Cassandra Users ; Saladi Naidu <
> naidusp2...@yahoo.com>
> *Sent:* Tuesday, September 15, 2015 4:53 PM
>
> *Subject:* Re: LTCS Strategy Resulting in multiple SSTables
>
> That's an ear
mum live cells per slice (last five
> minutes): 10002.0*
> *Average tombstones per slice (last five
> minutes): 45.11547792333818*
> *Maximum tombstones per slice (last five
> minutes): 36895.0*
>
>
>
>
> Naidu Saladi
>
>
>
>
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
utStream.readUnsignedShort(Unknown Source)
> ~[na:1.7.0_75]
> at java.io.DataInputStream.readUTF(Unknown Source) ~[na:1.7.0_75]
> at java.io.DataInputStream.readUTF(Unknown Source) ~[na:1.7.0_75]
> at
> org.apache.cassandra.io.compress.CompressionMetadata.(CompressionMetadata.java:106)
> ~[apache-cassandra-2.1.9.jar:2.1.9]
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
e : 13916 [WRITE:13916]
>> op rate : 14029 [WRITE:14029]
>> op rate : 13915 [WRITE:13915]
>
>
> … what’s WEIRD here is that
>
> Both tests take about 10 minutes. Yet it’s saying that the op rate for
> the second is slo
this periode, to three seconds ?
>
> Kind regards.
>
>
>
>
> 2015-09-14 14:15 GMT+01:00 Thouraya TH :
>
>> Hi all,
>>
>> Please, the gossip procotol in cassandra is running every ... seconds ?
>>
>>
>> Thank you so much for answers.
>&
rks (definitely include Rob's repair
suggestion, though). It is really the only way we've found to safely go
from SimpleSnitch to rack-aware NTS.
The same process works/is required for SimpleSnitch to Ec2Snitch fwiw.
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
ess it's safe to say that this proves that CASSANDRA-9753
> <https://issues.apache.org/jira/browse/CASSANDRA-9753> is the cause of
> the problem.
>
> I'm very happy to finally know the cause of this problem! Thanks for
> pointing me in the right direction.
> T
t yet
finished being built.
Does this work as anticipated when you set speculative_retry to NONE?
--
-----
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
token1.token10
>Node-2 : token11token20
>Node-3 : token21token30
> Node-4 : token31token40
>
>
> thanks
> Sai
>
>
>
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
591730234615865843651857942052865] for /10.0.0.1
>
> thanks
> Sai
>
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
tion) instead of the remote node on the broken DC.
>
>
>
> Does anyone know how to get such information when writing failed?
>
>
>
> Thanks
>
>
> Boying
>
>
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
mxremote.password.file=/etc/cassandra/jmxremote.password"
> fi
>
Retry with the following option added to your JVM_OPTS:
java.rmi.server.logCalls=true
This should produce some more information about what is going on.
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
s on 2.1 or 2.0. I'd be willing to bet you are the first
person trying to make EC2Snitch span regions on 2.2.
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
channel both of which are listed here:
http://usergrid.incubator.apache.org/community/
--
-----
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
h you would see with a higher Replication Factor.
--
---------
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
ND default_time_to_live = 0
> AND gc_grace_seconds = 0
> AND max_index_interval = 2048
> AND memtable_flush_period_in_ms = 0
> AND min_index_interval = 128
> AND read_repair_chance = 0.0
> AND speculative_retry = '99.0PERCENTILE';
>
> Thanks,
>
> Mike
>
> --
>
> Mike Heffner
> Librato, Inc.
>
>
--
-
Nate McCall
Austin, TX
@zznate
Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
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