probably not going to upgrade to 0.7 until it has been stable for at
least a month or two.
- Juho Mäkinen
On Thu, Oct 14, 2010 at 11:07 PM, Chris Oei chris@nestria.com wrote:
Hi all,
I'm trying to figure out whether I should migrate from 0.6.5 to 0.6.6 or go
directly to 0.7 when it's
The disks in cassandra node will most probably be your bottleneck. I'd
suggest (haven't tried, this is just based on my intuition) to invest
in SSD disks first and only after that think about going 10Gbps.
- Garo
On Tue, Oct 26, 2010 at 10:11 PM, Wayne wav...@gmail.com wrote:
Is anyone out
The load contains duplicate data which is created due to compaction.
Run 'cleanup' command with nodetool to those big nodes and you should
see the load drop to the actual usage.
- Garo
On Thu, Nov 4, 2010 at 11:08 AM, Mark Zitnik mark.zit...@gmail.com wrote:
Hi All,
I'm having a problem in
,])
But the requests which fails to the TSocket: Could not write 85 bytes -exception
doesn't print anything to the logs. I'm doing the same request all the
time with same
parameters.
How I should debug this issue? All ideas and tips are greatly appreciated.
- Juho Mäkinen
started at
version 0.6.1, but
updating to 0.6.3 did not fix the problem.
- Juho Mäkinen
On Tue, Jul 6, 2010 at 12:05 PM, Pieter Maes maesc...@gmail.com wrote:
I'm having a simmular problem, but i get verry random read problems 4
bytes timouts. (mailed before about this)
The only fix i got/found
doing this, or have you switched to store the
key-value -pairs in cassandra instead of mysql? What else are you
storing in cassandra than just the inbox search?
- Juho Mäkinen
On Tue, Jul 6, 2010 at 10:01 PM, Prashant Malik pma...@gmail.com wrote:
This is a ridiculous statement by some newbie I
on 32bit environment.
- Juho Mäkinen
On Wed, Jul 7, 2010 at 2:08 PM, john xie shanfengg...@gmail.com wrote:
http://wiki.apache.org/cassandra/FAQ#a_long_is_exactly_8_bytes
/**
* Takes php integer and packs it to 64bit (8 bytes) long big endian
binary representation
yet, any tips on that? Could you, David, send
me the stress.py command line which you used?
- Juho Mäkinen
On Mon, Jul 19, 2010 at 10:51 PM, David Schoonover
david.schoono...@gmail.com wrote:
Sorry, mixed signals in my response. I was partially replying to suggestions
that we were limited
time to run the test with three servers, but I'll do it
later anyway to see what kind of results it will produce. Also doing
the test with RF=2 should confirm that we can increase the cluster
throughput by increasing the RF count even if the requests don't hit
the disks.
- Juho Mäkinen
On Tue
Off topic, but what was this tool which prints per cpu utilization?
- Garo
On Mon, Jul 26, 2010 at 10:22 PM, Dathan Pattishall datha...@gmail.com wrote:
But the 16 cores are hardly utilized. Which indicates to me there is some
bad thread thrashing, but why?
1 [|
I have had to build a wrapper around php thrift calls which
automatically retry the cassandra thrift operation in case there was a
failure. It's not a proper sollution, but it has worked in our case
well enough to be reliable. Of course it would be nice if I wouldn't
need such ugly hack.
- Garo
Beware that the native thrift php bindings has a bug which might
change provided argument types. Check out the bug report which I
filled:
https://issues.apache.org/jira/browse/THRIFT-796
- Garo
On Fri, Aug 20, 2010 at 10:35 AM, sasha sasha2...@gmail.com wrote:
Julian Simon jsimon at
what's really going on, but I'd be very happy if someone could
have any clue or helpful ideas how to debug this out.
- Juho Mäkinen
the list back to thrift connection
function. In case all nodes have been tried (and thus removed) it
refills the node list and starts looping it again. In practice this
will never happen but the code is there just to be sure :)
- Juho Mäkinen
If one node is failing (let's assume it's overloaded
I think that JMX needs additional ports to function correctly. Try to
disable all firewalls between the client and the server so that client
can connect to any port in the server and try again.
- Juho Mäkinen
On Mon, Aug 30, 2010 at 7:07 PM, Allan Carroll alla...@gmail.com wrote:
Hi,
I'm
happens in the between.
Tomorrow I'm going to implement a history buffer which logs all
cassandra operations within the php request and logs it out in case I
detect this anomaly again. Hopefully that gives some light to the
problem.
- Juho Mäkinen
On Mon, Aug 30, 2010 at 10:50 PM, Benjamin Black
:)
- Juho Mäkinen
On Mon, Aug 30, 2010 at 11:15 PM, Juho Mäkinen juho.maki...@gmail.com wrote:
I'm not using connection poolin where the same tcp socket is used
between different php requests. I open a new thrift connection with
new socket to the node and I use the node through the request and I
capabilities. You can always
use some external locking mechanism like zookeeper
[http://hadoop.apache.org/zookeeper/] or implement your own sollution
on top of cassandra (not recommended as it's quite hard to get it
correctly).
- Juho Mäkinen / Garo
and insert it back to TalkLastMessages
There are also other operations and the actual payload is a bit more complex.
I'm happy to answer questions if somebody is interested :)
- Juho Mäkinen
On Mon, Sep 20, 2010 at 12:57 PM, Morten Wegelbye Nissen m...@monit.dk wrote:
Hello List,
No matter where
preparing to try up to ten times is not a bad idea.
The cluster users 0.6.5 with RF=3. Each operation is executed until it
succeeds or until 10 retries using this php wrapper
http://github.com/dynamoid/cassandra-utilities
Have others found similar results? Please discuss :)
- Juho Mäkinen
formatted json
text in a column, a supercolumn could have serve you?
Yes but that wouldn't benefit us so I just choosed to use simple CF
with JSON as column payload as they're easier to handle.
Also check my post from today Cassandra operation success ratio
survey results.
- Juho Mäkinen
./Morten
by
request type (get_slice takes longer than get_column)
- Juho Mäkinen
On Tue, Sep 21, 2010 at 5:56 PM, Morten Wegelbye Nissen m...@monit.dk wrote:
On 21-09-2010 15:29, Juho Mäkinen wrote:
It's known that compaction hurts the node performance so that it might
miss some requests. That's why
I posted a real life example how we used cassandra to store data for a
facebook chat like application. Check it out at
http://www.juhonkoti.net/2010/09/25/example-how-to-model-your-data-into-nosql-with-cassandra
- Juho Mäkinen
On Mon, Oct 4, 2010 at 7:04 PM, Petr Odut petr.o...@gmail.com wrote
I'm having problems understanding how incremental repairs are supposed to
be run.
If I try to do nodetool repair -inc cassandra will complain that It is
not possible to mix sequential repair and incremental repairs. However it
seems that running nodetool repair -inc -par does the job, but I
Hi!
2014-10-23 11:16 GMT+02:00 Alain RODRIGUEZ arodr...@gmail.com:
We are currently wondering about the best way to configure network
architecture to have a Cassandra cluster multi DC.
On solution 2, we would need to open IPs one by one on 3 ports (7000,
9042, 9160) at least. 100 entries
You should split your batch statements into smaller batches, say 100
operations per batch (or less if you keep getting those errors). You can
also grow the batch_size_warn_threshold_in_kb in your cassandra.yaml a bit,
I'm using 20kb in my cluster. You can read more from the relevant Jira:
I'm having problems running nodetool repair -inc -par -pr on my 2.1.1
cluster due to Did not get positive replies from all endpoints error.
Here's an example output:
root@db08-3:~# nodetool repair -par -inc -pr
[2014-10-30 10:33:02,396] Nothing to repair for keyspace 'system'
[2014-10-30
...@rahul.be wrote:
It appears to come from the ActiveRepairService.prepareForRepair portion
of the Code.
Are you sure all nodes are reachable from the node you are initiating
repair on, at the same time?
Any Node up/down/died messages?
Rahul Neelakantan
On Oct 30, 2014, at 6:37 AM, Juho Mäkinen
a different code path which would explain this.
I can't yet call this conclusive, but it seems that I can't run incremental
repairs on the current 2.1.1 and I'm still wondering if anybody else is
experiencing the same problem.
On Thu, Oct 30, 2014 at 1:14 PM, Juho Mäkinen juho.maki...@gmail.com
wrote
I have used Supermicro servers in my previous work and they give excellent
quality for their money. They have been considered a bit cheap quality
wise in the past, but the current models are pretty good. They offer all
standard stuff like remote control cards (IPMI), dual power supplies (if
you
>
> -Mark
>
> On Fri, Jul 22, 2016 at 8:10 AM, Juho Mäkinen <juho.maki...@gmail.com>
> wrote:
> > After a few days I've also tried disabling Linux kernel huge pages
> > defragement (echo never > /sys/kernel/mm/transparent_hugepage/defrag) and
> > turning coale
I'm doing some work on replacing OpsCenter in out setup. I ended creating a
Docker container which contains the following features:
- Cassandra 2.2.7
- MX4J (a JMX to REST bridge) as a java-agent
- metrics-graphite-3.1.0.jar (export some but not all JMX to graphite)
- a custom ruby which uses
Just to pick this up: Did you see any system load spikes? I'm tracing a
problem on 2.2.7 where my cluster sees load spikes up to 20-30, when the
normal average load is around 3-4. So far I haven't found any good reason,
but I'm going to try otc_coalescing_strategy: disabled tomorrow.
- Garo
On
I just recently upgraded our cluster to 2.2.7 and after turning the cluster
under production load the instances started to show high load (as shown by
uptime) without any apparent reason and I'm not quite sure what could be
causing it.
We are running on i2.4xlarge, so we have 16 cores, 120GB of
Hello. I'm in the process of migrating my old 60 node cluster into a new 72
node cluster running 2.2.6. I fired BulkLoader on the old cluster to stream
all data from every node in the old cluster to my new cluster, and I'm now
watching as my new cluster is doing compactions. What I like is to
og is very latency
> sensitive, even under low load. Do be sure you're using the deadline
> or noop scheduler for that reason, too.
>
> -Mark
>
> On Fri, Jul 22, 2016 at 4:44 PM, Juho Mäkinen <juho.maki...@gmail.com>
> wrote:
> >> Are you using XFS or Ext4 for data?
any major change except the system/kernel CPU
usage.
All further ideas how to debug this are greatly appreciated.
On Wed, Jul 20, 2016 at 7:13 PM, Juho Mäkinen <juho.maki...@gmail.com>
wrote:
> I just recently upgraded our cluster to 2.2.7 and after turning the
> cluster under pr
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