Hi,
On the dev@ mailing list I proposed updating the default value of the
advanced property "disk_access_mode" to a more stable default for typical
workloads. See the discussion on [1] for details.
I wanted to check if anyone had experiences (good or bad) with overriding
this setting in the
They are really in mebibytes (MiB). In the upcoming release of Cassandra,
the configuration is getting standardised to KiB, MiB, etc, to remove
ambiguity (CASSANDRA-15234 [1]). For more info, see Ekaterina
Dimitrova's blog post [2]. Cheers!
[1]
Hi, all,
The config has data limits described as KB, MB, etc. Are these KB MB or KiB
MiB? (curses to the lazy modern age for forcing a change) Nodetool status
reports TiB. I assume these are all really base2 numbers but am just seeking to
clarify.
Eg.,
# Default value ("auto") is 1/256th
manage our servers via
>>>> Ansible. In this use case, we create an Ansible playbook to update the
>>>> servers one by one, change the cassandra.yaml file, restart Cassandra, and
>>>> wait for it to finish the restart, and then wait for a few minutes before
&
and we manage our servers via
>>> Ansible. In this use case, we create an Ansible playbook to update the
>>> servers one by one, change the cassandra.yaml file, restart Cassandra, and
>>> wait for it to finish the restart, and then wait for a few minutes before
>>
g in git here.
>
> On Fri, Oct 15, 2021 at 5:19 PM Bowen Song wrote:
>
>> We have Cassandra on bare-metal servers, and we manage our servers via
>> Ansible. In this use case, we create an Ansible playbook to update the
>> servers one by one, change the cassandra.yaml file, restart
e, change the cassandra.yaml file, restart Cassandra, and
> wait for it to finish the restart, and then wait for a few minutes before
> moving on to the next server.
> On 15/10/2021 22:42, ZAIDI, ASAD wrote:
>
>
>
> Hello Folks,
>
>
>
> Can you guys please suggest tool or approach
We have Cassandra on bare-metal servers, and we manage our servers via
Ansible. In this use case, we create an Ansible playbook to update the
servers one by one, change the cassandra.yaml file, restart Cassandra,
and wait for it to finish the restart, and then wait for a few minutes
before
Hello Folks,
Can you guys please suggest tool or approach to update cassandra.yaml file in
multi-dc environment with large number of nodes efficiently.
Thank you.
Asad
Windows 10
From: Erick Ramirez<mailto:erick.rami...@datastax.com>
Sent: 27 July 2020 12:51
To: user@cassandra.apache.org<mailto:user@cassandra.apache.org>
Subject: Re: How to specify a configuration in cass-operator for Cassandra.yaml
Is it possible you don't have the k8s cluster runni
Is it possible you don't have the k8s cluster running?
To answer your question, you can edit your k8s cluster configuration with
the new settings and the cass-operator will apply the changes then it will
perform a rolling restart of the pods for the changes to take effect.
Cheers!
>
w to specify a configuration in cass-operator for Cassandra.yaml
Yes, you're right -- you need to override the defaults by specifying the
configuration in the operator yaml spec:
spec:
...
config:
cassandra-yaml:
...
commitlog_sync: batch
...
Cheers!
On Mon, 27 Ju
> I am using cass-operator to run Cassandra in Kubernetes. I am also using
> ScalarDB to provide ACID support in Cassandra.
>
>
>
> One pre-requisite for ScalarDB is to change the commitlog_sync to batch.
>
>
>
> “Change commitlog_sync from periodic to batch in cas
Hi
I am using cass-operator to run Cassandra in Kubernetes. I am also using
ScalarDB to provide ACID support in Cassandra.
One pre-requisite for ScalarDB is to change the commitlog_sync to batch.
“Change commitlog_sync from periodic to batch in cassandra.yaml not to lose
data when quorum
> *From:* "Steinmaurer, Thomas" <thomas.steinmau...@dynatrace.com>
> *To:* "user@cassandra.apache.org" <user@cassandra.apache.org>
> *Sent:* Friday, November 3, 2017 6:34 AM
> *Subject:* cassandra.yaml configuration for large machines (scale up vs.
&
ilable in San Jose area or remote.
cass_top: https://github.com/jamesbriggs/cassandra-top
From: "Steinmaurer, Thomas" <thomas.steinmau...@dynatrace.com>
To: "user@cassandra.apache.org" <user@cassandra.apache.org>
Sent: Friday, November 3, 2017 6:34 AM
Su
Disks (so somewhere beyond 2000 IOPS).
What are some recommended cassandra.yaml configuration / JVM settings, e.g. we
have been using with something like that as a first baseline:
* 31G heap, G1, -XX:MaxGCPauseMillis=2000
* concurrent_compactors: 8
in a tarball installation, the location of cassandra.yaml is defined by the
property $CASSANDRA_CONF defined on bin/cassandra.in.sh
this file is located by the bin/cassandra binary, and can be in one of the
following directories:
bin/cassandra.in.sh
~/.cassandra.in.sh
/usr/share/cassandra
’ will recognize the path to the file
cassandra.yaml ?
Thanks a lot.
Best Regards.
Hi,
I have not seen any available cmd like nodetool showparameters to show loaded
cassandra.yaml parameters of one node (to display them remotely, or to check if
loaded parameters are the ones of the cassandra.yaml).
Does anyone know if there is a cmd to display those parameters (I don't think
On Wed, Apr 22, 2015 at 10:09 AM, DE VITO Dominique
dominique.dev...@thalesgroup.com wrote:
I have not seen any available cmd like “nodetool showparameters” to show
loaded cassandra.yaml parameters of one node (to display them remotely, or
to check if loaded parameters are the ones
Hi guys,
I am looking at added and dropped option in Cassandra between 1.2.18 and
2.0.11 and this makes me wonder:
Why has the index_interval option been removed from cassandra.yaml ? I know
we can also define it on a per table basis, yet, this global option was
quite useful to tune memory usage
from cassandra.yaml ? I
know we can also define it on a per table basis, yet, this global option
was quite useful to tune memory usage. I also know that this index is now
kept off-heap, but I can not see when and why this option has been removed,
any pointer ? Also it seems this option still
been removed from cassandra.yaml ? I
know we can also define it on a per table basis, yet, this global option
was quite useful to tune memory usage. I also know that this index is now
kept off-heap, but I can not see when and why this option has been removed,
any pointer ? Also it seems
successful
INFO 19:27:41,739 Loading settings from file:/etc/cassandra/cassandra.yaml
INFO 19:27:42,052 Data files directories: [/data/cassandra/data]
INFO 19:27:42,052 Commit log directory: /commitlog
INFO 19:27:42,052 DiskAccessMode 'auto' determined to be mmap,
indexAccessMode is mmap
and
2.0.11 and this makes me wonder:
Why has the index_interval option been removed from cassandra.yaml ? I
know we can also define it on a per table basis, yet, this global option
was quite useful to tune memory usage. I also know that this index is now
kept off-heap, but I can not see when
:
Hi guys,
I am looking at added and dropped option in Cassandra between 1.2.18
and 2.0.11 and this makes me wonder:
Why has the index_interval option been removed from cassandra.yaml ? I
know we can also define it on a per table basis, yet, this global option
was quite useful to tune memory
:/etc/cassandra:/usr/share/java/commons-daemon.jar:/usr/share/cassandra/lib/jamm-0.2.5.jar
INFO 19:27:41,717 JNA mlockall successful
INFO 19:27:41,739 Loading settings from file:/etc/cassandra/cassandra.yaml
INFO 19:27:42,052 Data files directories: [/data/cassandra/data]
INFO 19:27:42,052 Commit
Is the default 'auto' the best possible option so that no one has to worry
about it anymore ?
Yes something like that I guess.
You can add the disk_access_mode property to your cassandra.yaml and set it
to standard to disable memory mapped access, it will work. It's the same
thing
: user@cassandra.apache.org
Objet : Re: property 'disk_access_mode' not found in cassandra.yaml
Is the default 'auto' the best possible option so that no one has to worry
about it anymore ?
Yes something like that I guess.
You can add the disk_access_mode property to your cassandra.yaml and set
Its not clear to me how you are starting the daemon. You mention Eclipse - do
you have Cassandra embedded in an Eclipse project? cassandra.yaml might not be
read correctly. Make sure its on the class path, i have it in
src/main/resources and it gets picked up from there just fine ( although i
? cassandra.yaml
might not be read correctly. Make sure its on the class path, i have it in
src/main/resources and it gets picked up from there just fine ( although i
only ever use it in my unit tests )
CassandraDaemon cassandra = new CassandraDaemon();
cassandra.init(null);
cassandra.start
I have been using cqlsh (and --cql3) successfully for a few weeks.
But yesterday it stopped working, with the all too familiar,
Connection error: Could not connect to localhost:9160
Still got the same message, 9160, after I changed the rpc_port in the yaml
file to 9161 or 9159.
I recently
Dear all
I am trying to add a new node to the Cassandra cluster. In all the
documentations available on net it says to set the auto bootstrap property in
cassandra.yaml to true but I am not finding the property in the file. Please
help me
Thanks and Regards
Prakrati Agrawal | Developer - Big
a new node to the Cassandra cluster. In all the
documentations available on net it says to set the auto bootstrap property
in cassandra.yaml to true but I am not finding the property in the file.
Please help me
** **
Thanks and Regards
** **
Prakrati Agrawal | Developer - Big Data(ID
@cassandra.apache.orgmailto:user@cassandra.apache.org
Date: Sun, 3 Jun 2012 22:58:24 -0700
To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
user@cassandra.apache.orgmailto:user@cassandra.apache.org
Subject: Can not find auto bootstrap property in cassandra.yaml for Cassandra
1.1.0
[mailto:prakrati.agra...@mu-sigma.com]
Sent: Sunday, June 03, 2012 10:58 PM
To: user@cassandra.apache.org
Subject: Can not find auto bootstrap property in cassandra.yaml for Cassandra
1.1.0
Dear all
I am trying to add a new node to the Cassandra cluster. In all the
documentations available on net
Hi All,
I'm currently running 1.0.7, and just noticed a small error in the comment
section.
# Frame size for thrift (maximum field length).
# 0 disables TFramedTransport in favor of TSocket. This option
# is deprecated; we strongly recommend using Framed mode.
Yup, unframed transport was removed in 0.8.beta 2.
I'll fix the comments, thanks.
Aaron
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 25/01/2012, at 10:27 PM, Jools Enticknap wrote:
Hi All,
I'm currently running 1.0.7, and just noticed
I just discovered that using host names for seed nodes in cassandra.yaml do
not work. This is done on purpose?
I believe so yes, to avoid relying on DNS to map correctly given that
everything else is based on IP address. (IIRC, someone chime in if
there is a different reason.)
--
/ Peter
The seed names should match what the seeds advertise as
listen_address. I can't think of a reason host names shouldn't work,
but as Peter said, using host names is a bad idea anyway.
2011/9/25 Radim Kolar h...@sendmail.cz:
I just discovered that using host names for seed nodes in cassandra.yaml
Dne 26.9.2011 16:37, Jonathan Ellis napsal(a):
The seed names should match what the seeds advertise as
listen_address. I can't think of a reason host names shouldn't work,
I used DNS alias, that was probably reason why it didn't worked.
I just discovered that using host names for seed nodes in cassandra.yaml
do not work. This is done on purpose?
facing some issues with embedded cassandra that we utilize in our
application.
With 0.7.2, we define our keyspace in cassandra.yaml and use Hector to give
us an embedded cassandra instance loaded with schema from cassandra.yaml. Is
it not possible to do the same with Cassandra / Hector 0.8.x?
Can
small cassandra issue with my embedded server.
In my embedded server setup, I use
cassandra-javautils's CassandraServiceDataCleaner to clean-up the data
directories, which in turn uses DatabaseDescriptor.getAllDataFileLocations()
to get various directories configured in cassandra.yaml.
Now
Hi,
I have just started the process of upgrading Cassandra from 0.7.2 to 0.8.4,
and I am facing some issues with embedded cassandra that we utilize in our
application.
With 0.7.2, we define our keyspace in cassandra.yaml and use Hector to give
us an embedded cassandra instance loaded with schema
It clearly isn't. There is definitely work involved for the CPU also when
doing mmap. It is just that you move it from context switching and small I/O
buffer copying to memory management.
*All* memory access a process does is subject to the rules of the
memory management unit of the CPU, so
On Fri, Jul 29, 2011 at 4:35 AM, Terje Marthinussen
tmarthinus...@gmail.com wrote:
What is the origin of the mmap
is substantially faster claim?
The origin is the performance testing we did when adding mmap'd i/o.
I believe Chris Goffinet also found a double-digit percentage
performance
“Cassandra High Performance Cookbook” from Packt
has instructions for “Stopping cassandra from using swap without disabling
it system wide”. We’ve tried following the instructions but it refers to a
“memory_locking_policy” variable in cassandra.yaml which throws an “unknown
property” error
High Performance Cookbook” from Packt has
instructions for “Stopping cassandra from using swap without disabling it
system wide”. We’ve tried following the instructions but it refers to a
“memory_locking_policy” variable in cassandra.yaml which throws an “unknown
property” error on startup and I
On Jul 28, 2011, at 9:52 PM, Jonathan Ellis wrote:
This is not advisable in general, since non-mmap'd I/O is substantially
slower.
I see this again and again as a claim here, but it is actually close to 10
years since I saw mmap'd I/O have any substantial performance benefits on any
real
If you're actually hitting disk for most or even many of your reads then
mmap doesn't matter since the extra copy to a Java buffer is negligible
compared to the i/o itself (even on ssds).
On Jul 28, 2011 9:04 AM, Terje Marthinussen tmarthinus...@gmail.com
wrote:
On Jul 28, 2011, at 9:52 PM,
I would love to understand how people got to this conclusion however and try
to find out why we seem to see differences!
I won't make any claims with Cassandra because I have never bothered
benchmarking the different in CPU usage since all my use-cases have
been more focused on I/O efficiency,
Benchmarks was done with up to 96GB memory, much more caching than most people
will ever have.
The point anyway is that you are talking I/O in 10's or at best, a few hundred
MB/sec before cassandra will eat all your CPU (with dual CPU 6 cores in our
case).
The memcopy involved here deep
tried following the instructions but it refers to a
“memory_locking_policy” variable in cassandra.yaml which throws an “unknown
property” error on startup and I can’t find any reference to it in any of the
cassandra docs.
I’ve copied the summarised instructions below, does anyone know
Try another slash in file:/, ie file://
On Thu, Jul 14, 2011 at 10:55 AM, Derek Tracy trac...@gmail.com wrote:
I tried putting the cassandra.yaml in the classpath but got the same error.
Adding -Dcassandra.config=file:/path/to/cassandra.yaml did work.
-
Derek
I tried putting the cassandra.yaml in the classpath but got the same error.
Adding -Dcassandra.config=file:/path/to/cassandra.yaml did work.
-
Derek Tracy
trac...@gmail.com
-
On Wed, Jul 13, 2011 at 6:22 PM, Jonathan Ellis jbel
I am trying to integrate the Cassandra JDBC CQL driver with my companies ETL
product.
We have an interface that performs database queries using there respective
JDBC drivers.
When I try to use the Cassandra CQL JDBC driver I keep getting a stacktrace:
Unable to locate cassandra.yaml
I am using
The current version of the driver does require having the server's
cassandra.yaml on the classpath. This is a bug.
On Wed, Jul 13, 2011 at 3:13 PM, Derek Tracy trac...@gmail.com wrote:
I am trying to integrate the Cassandra JDBC CQL driver with my companies ETL
product.
We have an interface
setting server.config -$SERVER_PATH/Cassandra.yaml as a system property
should resolve this?
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: Thursday, July 14, 2011 3:53 AM
To: user@cassandra.apache.org
Subject: Re: JDBC CQL Driver unable to locate
Thanks Aaron. It is really a great pointer to solution.
-Vivek
From: aaron morton [mailto:aa...@thelastpickle.com]
Sent: Monday, June 20, 2011 12:51 AM
To: user@cassandra.apache.org
Subject: Re: Cassandra.yaml
The change to the remove the calls to DatabaseDecriptor were in this commit
://www.thelastpickle.com
On 17 Jun 2011, at 20:52, Vivek Mishra wrote:
Thanks Aaron. But I tried it with 0.8.0 release only!
From: aaron morton [mailto:aa...@thelastpickle.com]
Sent: Friday, June 17, 2011 1:55 PM
To: user@cassandra.apache.org
Subject: Re: Cassandra.yaml
sounds like
https
I have a query:
I have my Cassandra server running on my local machine and it has loaded
Cassandra specific settings from
apache-cassandra-0.8.0-src/apache-cassandra-0.8.0-src/conf/cassandra.yaml
Now If I am writing a java program to connect to this server why do I need to
provide a new
Hi Vivek,
When I write client code in Java, using Hector, I don't specify a
cassandra.yaml ... I specify the host(s) and keyspace I want to
connect to. Alternately, I specify the host(s) and create the
keyspace if the one I would like to use doesn't exist (new cluster for
example). At no point
]
org.apache.cassandra.config.DatabaseDescriptor - Fatal configuration error
org.apache.cassandra.config.ConfigurationException: Cannot locate cassandra.yaml
at
org.apache.cassandra.config.DatabaseDescriptor.getStorageConfigURL(DatabaseDescriptor.java:111
16:21:54,517 ERROR [main]
org.apache.cassandra.config.DatabaseDescriptor - Fatal configuration error
org.apache.cassandra.config.ConfigurationException: Cannot locate cassandra.yaml
Hmm, worked-around that by setting -Dcassandra.config (hmm, the client needs
the server's config...?).
2011-06
On Sun, Jun 5, 2011 at 9:38 AM, Timo Nentwig timo.nent...@toptarif.de wrote:
Hmm, worked-around that by setting -Dcassandra.config (hmm, the client needs
the server's config...?).
Yes, this is fixed for 0.8.1.
Not very verbose :-\ May have something to do with my l/p being just / for
Hi all,
I found out a small typo in cassandra.yaml, which can confuse
inattentive copy-paster. Here is the patch.
Index: conf/cassandra.yaml
===
--- conf/cassandra.yaml (revision 1101465)
+++ conf/cassandra.yaml (working copy
. inside quotations is correct in English.
On Tue, May 10, 2011 at 9:06 AM, Benoit Perroud ben...@noisette.ch wrote:
Hi all,
I found out a small typo in cassandra.yaml, which can confuse
inattentive copy-paster. Here is the patch.
Index: conf/cassandra.yaml
the point Benoit is trying to make ...
CU,
Gert
On Tue, May 10, 2011 at 9:06 AM, Benoit Perroud ben...@noisette.ch
wrote:
Hi all,
I found out a small typo in cassandra.yaml, which can confuse
inattentive copy-paster. Here is the patch.
Index: conf/cassandra.yaml
On Tue, May 10, 2011 at 11:40 AM, Jonathan Ellis jbel...@gmail.com wrote:
. inside quotations is correct in English.
It's a subtle and non-obvious rule of English. Besides, in a programming
context, the English rule always feels wrong to me :)
Comments are text, not code.
On Tue, May 10, 2011 at 12:01 PM, Tyler Hobbs ty...@datastax.com wrote:
On Tue, May 10, 2011 at 11:40 AM, Jonathan Ellis jbel...@gmail.com wrote:
. inside quotations is correct in English.
It's a subtle and non-obvious rule of English. Besides, in a programming
Hi All,
I have following in my cassandra.yaml
keyspaces:
- column_families:
- column_metadata: []
column_type: Standard
compare_with: BytesType
gc_grace_seconds: 86400
key_cache_save_period_in_seconds: 14400
keys_cached: 0.0
max_compaction_threshold: 32
http://wiki.apache.org/cassandra/FAQ#no_keyspaces
On Mon, May 9, 2011 at 7:51 PM, Anurag Gujral anurag.guj...@gmail.comwrote:
Hi All,
I have following in my cassandra.yaml
keyspaces:
- column_families:
- column_metadata: []
column_type: Standard
compare_with
Look for Where are my keyspaces? on following page:
*http://wiki.apache.org/cassandra/StorageConfiguration
*
On Mon, May 9, 2011 at 5:51 PM, Anurag Gujral anurag.guj...@gmail.comwrote:
Hi All,
I have following in my cassandra.yaml
keyspaces:
- column_families:
- column_metadata
anurag.guj...@gmail.comwrote:
Hi All,
I have following in my cassandra.yaml
keyspaces:
- column_families:
- column_metadata: []
column_type: Standard
compare_with: BytesType
gc_grace_seconds: 86400
key_cache_save_period_in_seconds: 14400
keys_cached: 0.0
We use Puppet to manage the cassandra.yaml in a different location from the
installation. Ours is in /etc/cassandra/cassandra.yaml
You can set the environment CASSANDRA_CONF (i believe it is. check the
cassandra.in.sh) and the startup script will pick up this as the configuration
file
to elaborate:
our_temp_yaml=/tmp/$$.cassandra.yaml
cp cassandra.yaml $our_temp_yaml
for instance in $instances
# do some more work to get the hostname from the instance
sed -i s/^seeds:/seeds: \n - $hostname/ $our_temp_yaml
done
-- the above inserts a new line for each $hostname
Hi All,
I want to modify the values in the cassandra.yaml which comes with
the cassandra-0.7 package based on values of hostnames,
colo etc.
Does someone knows of some script which I can use which reads in default
cassandra.yaml and write outs new cassandra.yaml
with values based
Aaron
On 21 Mar 2011, at 12:39, Anurag Gujral wrote:
Hi All,
I want to modify the values in the cassandra.yaml which comes with
the cassandra-0.7 package based on values of hostnames,
colo etc.
Does someone knows of some script which I can use which reads in default
=8080
to
JMX_PORT=9980
in cassandra-env.sh
Then ran
sudo ./bin/cassandra -f -p pidfile
threw a Fatal configuration error:
org.apache.cassandra.config.ConfigurationException:
localhost/10.0.1.3:7000is in use by another process. Change
listen_address:storage_port in
cassandra.yaml to values that do
in cassandra-env.sh
Then ran
sudo ./bin/cassandra -f -p pidfile
threw a Fatal configuration error:
org.apache.cassandra.config.ConfigurationException: localhost/10.0.1.3:7000
is in use by another process. Change listen_address:storage_port in
cassandra.yaml to values that do
NetworkTopologyStrategy rather than the
default SimpleStrategy. I wish to specify how many copies each DC
should carry.
For the above I changed the cassandra.yaml and
cassandra-topology.properties files appropriately on the first node.
My question is: For the rest of the nodes, do I have to make all
.
For the above I changed the cassandra.yaml and
cassandra-topology.properties files appropriately on the first node.
My question is: For the rest of the nodes, do I have to make all of
the above changes first to their respective config files or just a
smaller subset such as (listen_address, seed
how are folks customizing the cassandra.yaml for each node in the
cluster. specifically the token and IP address.
with XML i used entities, but i'm not familiar with YAML. does yaml
support the same concept? or any sort of textual substitution?
thx
Funny you should mention that. I just put my half-baked solution to
this problem on github today.
https://github.com/gdusbabek/cassandra-maker. It generates
cassandra.yaml files (and entire config directories too) that are
based on the svn defaults. It should be easy to customize it to fit
your
:56 PM, Jake Luciani jak...@gmail.com wrote:
You can specify the location of cassandra.yaml with a url so you can keep
your configs in one (redundant place) like S3 or generate them on the fly in
a http service...
On Thu, Dec 30, 2010 at 3:34 PM, B. Todd Burruss bburr...@real.com wrote:
how
I think this may have been discussed before, but I cannot find any reference to
it. Just wanted to confirm how cassandra.yaml is used after the cluster is
initialised.
Start a clean install of 0.7b1, use jconsole to import the schema from yaml.
Drain the node and shut it down, then remove
The cassandra.yaml holds general configuration of cassandra and the
schema definitions.
As of 0.7, the schema definition are not need anymore in this file as
schema can be defined
programatically. Those definition are are ignored by any node that
already have schema loaded
(hence the warning
Thanks for theexplanation, I'll see if I can merge that into thehttp://wiki.apache.org/cassandra/StorageConfigurationandhttp://wiki.apache.org/cassandra/StorageConfiguration_0.7pagesAaronOn 24 Aug, 2010,at 12:42 AM, Sylvain Lebresne sylv...@yakaz.com wrote:The cassandra.yaml holds general
90 matches
Mail list logo
