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On Monday, February 3, 2025, 6:00 PM, Štefan Miklošovič
wrote:
The Cassandra team is pleased to announce the release of Apache Cassandra
version 4.1.8.
Apache Cassandra is a fully distributed database. It is the right choice when
you need
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On Monday, January 13, 2025, 10:43 PM, Bret McGuire
wrote:
The Cassandra team is pleased to announce the release of Cassandra Java
Driver version 3.12.0. This is the first release of the 3.x Java driver since
its donation to the Apache Software
Hi,
I have finally had time to test this a bit. And the issue seems to be
there with Cassandra 3.11.13 as well as 3.0.27. Hinted handoff from
these versions to version 4.0.6 does not seem to work.
The way I tested this was by setting up a 2 node cluster, 1 node in
each of dc1 and dc2. Install
Hi,
We are currently in the process of upgrading our environment from
3.0.27 to 4.0.4. However I see some issues with hints not being sent
from v3 nodes to v4 nodes.
We have a test environment with 2DCs, we are currently writing to DC1
and DC2 have been upgraded from version 3.0.27 -> 4.
Hi folks,
I'm running a job on an offline node to test how long it takes to run
sstablesplit several large sstable.
I'm a bit dismayed to see it took about 22 hours to process a 1.5
gigabyte sstable! I worry about the 32 gigabyte sstable that is my
ultimate target to split.
This is
Hi folks,
I've been looking at various articles on the TRACING ON output of cassandra.
I'm not finding a definitive description of what the output means.
https://docs.datastax.com/en/dse/6.7/cql/cql/cql_reference/cqlsh_commands/cqlshTracing.html
says "Note: The source_elapsed
Thanks for the info Jeff, all very helpful!
From: user@cassandra.apache.org At: 07/11/20 12:30:36To:
user@cassandra.apache.org
Subject: Re: Running Large Clusters in Production
Gossip related stuff eventually becomes the issue
For example, when a new host joins the cluster (or replaces a
Thank you John and Jeff, I was leaning towards sharding and this really helps
support that opinion. Would you mind explaining a bit more what about vnodes
caused those issues?
From: user@cassandra.apache.org At: 07/10/20 19:06:27To:
user@cassandra.apache.org
Cc: Isaac Reath (BLOOMBERG/ 919
Hi All,
I’m currently dealing with a use case that is running on around 200 nodes, due
to growth of their product as well as onboarding additional data sources, we
are looking at having to expand that to around 700 nodes, and potentially
beyond to 1000+. To that end I have a couple of
Thank you.
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On Friday, March 27, 2020, 9:02 PM, Erick Ramirez
wrote:
It really depends on your definition of "stable" but you can run C* on as
little as a single-core machine with 4-6GB of RAM. It will be stable enough to
do 1 or 2 queries per
What are the minimum system requirements for running a stable install of
Cassandra?
Sent from Yahoo Mail for iPhone
en SSTables are being cached and the cache fills
> up faster than objects are evicted from it. Note that the message is logged
> at INFO level (instead of WARN or ERROR) because there is no detrimental
> effect but there will be a performance hit in the form of read latency.
> When spac
Hi folks,
When sstableloader hits a very large sstable cassandra may end up logging a
message like this:
INFO [pool-1-thread-4] 2020-02-08 01:35:37,946 NoSpamLogger.java:91 -
Maximum memory usage reached (536870912), cannot allocate chunk of 1048576
The loading process doesn't abort, an
Hi folks,
I'm looking at a table that has a primary key defined as "publisher_id
text". I've noticed some of the entries have what appears to me to be
a UTF-8 BOM marker and some do not.
https://docs.datastax.com/en/archived/cql/3.3/cql/cql_reference/cql_data_types_c.html
Hi folks,
I'm working on a clean-up task for some bad data in a cassandra db.
The bad data in this case are values with mixed case that will need to
be lowercased. In some tables the value that needs to be changed is a
primary key, in other cases it is not.
>From the reading I'
Thank you. But I have added any tables yet. It’s empty...
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On Tuesday, October 22, 2019, 1:15 AM, Matthias Pfau
wrote:
Did you check nodetool status and logs? If so, what is reported?
Regarding that more and more memory is used. This might be a problem with
What are minimum and recommended ram and space requirements to run Cassandra in
AWS?
Every like 24 hours Cassandra stops working. Even though the service is active,
it’s dead and non responsive until I restart the service.
Top shows %MEM slowly creeping upwards. Yesterday it showed 75%.
In the l
Hi folks,
I took a nodetool snapshot of a keyspace in my cassandra 3.11 cluster
and it included directories with a 'dot' prefix (often called a hidden
file/directory). As an example:
/var/lib/cassandra/data/impactvizor/tableau_notification-04bfb600291e11e7aeab31f0f0e5804b/snapshots/
Thank you.
Sent from Yahoo Mail for iPhone
On Thursday, September 12, 2019, 1:09 AM, Hossein Ghiyasi Mehr
wrote:
Update in Cassandra is upsert (update or insert). So when you update a row
which isn't exist, it will create it."IF EXIST" can be used in some queries.
On Thu, Se
#yiv9726893009 {margin:1.0in 1.0in 1.0in
1.0in;}#yiv9726893009 div.yiv9726893009WordSection1 {}#yiv9726893009
Use if exists clause.
UPDATE table
SET column ='something'
WHERE key = ‘value’ IF EXISTS;
From: A
Sent: Wednesday, September 11, 2019 11:05 P
;} _filtered #yiv9726893009 {margin:1.0in 1.0in 1.0in
1.0in;}#yiv9726893009 div.yiv9726893009WordSection1 {}#yiv9726893009
Use if exists clause.
UPDATE table
SET column ='something'
WHERE key = ‘value’ IF EXISTS;
From: A
Sent: Wednesday, September 11, 2019 1
I have an update statement that has a where clause with the primary key
(email,companyid).
When executed it always creates a new row. It’s like it’s not finding the
existing row with the primary key.
I’m using Cassandra-driver.
What am I doing wrong? I don’t want a new row. Why doesn’t it seem
Did you check if packets are NOT being dropped for network interfaces Cassandra
instances are consuming (ifconfig –a) internode compression is set for all
endpoint – may be network is playing any role here?
is this corruption limited so certain keyspace/table | DCs or is that wide
spread – the
I don’t think anyone can predict with certainty if instance won’t crash but
there are good chances it will - unless you take remedial actions.
If you are not doing subrange repair, a lot of merkle tree data can potentially
be scanned/streamed taking toll on memory resources – that , taking
Hello,
Good day. This is Martin.
Can someone help me with the following query regarding Cassandra repair and
compaction?
Currently we have a large keyspace (keyspace_event) with 1TB of data (in
/var/lib/cassandra/data/keyspace_event);
There is a cluster with Datacenter 1 contains 3 nodes, Data
9, 2019 10:56 AM
To: user@cassandra.apache.org
Subject: Re: Jmx metrics shows node down
Is there workaround to shorten 72 hours to something shorter?(you said by
default, wondering if one can set a non-default value?)
Thanks,
Yuping
On Jul 29, 2019, at 7:28 AM, Oleksandr Shulgin
mailto:olek
Thank you all for your insights.
When spark-connector adds allows filtering to a query, it makes the query to
just ‘run’ no matter if it is expensive for larger table OR not so expensive
for table with fewer rows.
In my particular case, nodes are reaching 2TB/per node load in 50 node cluster
we see unpredictability in
application performance – just as documentation says.
I’m trying to understand why would a connector add a clause in query when this
can cause negative impact on database/application performance. Is that data
model that is driving connector make its decision and add
grafana.
Zaidi,
In latest aws Linux Ami they took care of this bug . And also changing the Ami
needs rebuild of all the nodes so didn't took that route.
On Fri, Jul 19, 2019, 12:32 PM ZAIDI, ASAD A
mailto:az1...@att.com>> wrote:
“aws asked to set nvme_timeout to higher number in et
and comit logs are stored in gp2 ebs. C5 instance type had a
bug which aws asked to set nvme_timeout to higher number in etc/grub.conf.
after setting the parameter and did run nodetool drain and reboot the node in
east
Instance cameup but Cassandra didn't come up normal had to start the Cass
Hi,
We had a hardware issue with one node in a Cassandra cluster and had to use the
"nodetool removenode UUID" command from a different node. This seems to be
running fine, but one node was restarted after the "nodetool removenode"
command was run, and now it seems all str
I’m on environment with apache Cassandra 3.11.1 with java 1.8.0_144.
One Node went OOM and crashed. Re-starting this crashed node is taking long
time. Trace level debug log is showing messages like:
Debug.log trace excerpt:
TRACE [main] 2019-06-18 21:30:43,449 LogTr
Adding one node at a time – is that successful?
Check value of streaming_socket_timeout_in_ms parameter in cassandra.yaml and
increase if needed.
Have you tried Nodetool bootstrap resume & jvm option i.e. JVM_OPTS="$JVM_OPTS
-Dcassandra.consistent.rangemovement=false" ?
From
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The article you mentioned here clearly says “For new users to Cassandra, the
safest way to add multiple nodes into a cluster is to add them one at a time.
Stay tuned as I will be following up with another post on bootstrapping.”
When extending cluster it is indeed recommended to go slow
case, all the nodes of the cluster have the same problem.
Thanks.
On 2019/05/01 06:13:06, Ayub M wrote:
> Do you have search on the same nodes or is it only cassandra. In my
> case it was due to a memory leak bug in dse search that consumed more
> memory resulting in oom.
>
>
30, 2019 6:35 AM
To: user@cassandra.apache.org
Subject: Decommissioning a new node when the state is JOINING
Hi Experts,
I have a cassandra cluster running with 5 nodes. For some reason, I was
creating a new cassandra cluster, but one of the nodes intended for new cluster
had the same
Sent from Yahoo Mail for iPhone
Hi guys,
Does anyone know about a CAS3 tuning guide like the excellent Amy's
Cassandra 2.1 tuning guide
<https://tobert.github.io/pages/als-cassandra-21-tuning-guide.html> ?
It would be much appreciated.
Regards,
Jero
Andrew,
Thank you, it's a valuable information.
Regards,
Jero
On Mon, Sep 3, 2018 at 12:04 PM Andy Tolbert
wrote:
> Hi Jeronimo,
>
> Until Cassandra 4.0, JDK 8 is required. See CASSANDRA-9608
> <https://jira.apache.org/jira/browse/CASSANDRA-9608> for more details.
&g
Hi guys,
I'd like to know which java version to use with Cassandra 3.11.3. Is Java
10 already supported ? Is it safe ?
Thanks.
Compression ratio is ratio of compression to its original size - smaller is
better; see it like compressed/uncompressed
1 would mean no change in size after compression!
-Original Message-
From: Vitaliy Semochkin [mailto:vitaliy...@gmail.com]
Sent: Tuesday, August 28, 2018 12:03 PM
To
ga
mailto:mundeg...@gmail.com>> wrote:
120G data
28G heap out of 48 on system
9 node cluster, RF3
On Thu, Aug 23, 2018, 17:19 Mohamadreza Rostami
mailto:mohamadrezarosta...@gmail.com>> wrote:
Hi,
How much data do you have? How much RAM do your servers have? How much do you
have a heep?
On Thu,
Hello Folks,
I've an virtualized environment running with VMware where Cassandra is humming
on NFS mounted storage. As the application load increases ,they increase number
of nodes in data center however writes are getting slower, nodes are flapping
and application complains in write performan
lto:lu...@maurobenevides.com.br]
Sent: Wednesday, June 27, 2018 7:02 AM
To: user@cassandra.apache.org
Subject: Maximum SSTable size
Hello Community,
Is there a maximum SSTable Size?
If there is not, does it go up to the maximum Operational System values?
Thanks in advance,
Lucas Benevides
Are you also seeing time-outs on certain Cassandra operations?? If yes, you may
have to tweak *request_timeout parameter in order to get rid of dropped
mutation messages if application data model is not upto mark!
You can also check if network isn't dropping packets (ifconfig -a
Hello Folks,
I’m looking for possible reasons and solution for these frequently appearing
warning messages I’m seeing in spark <>cassandra job’s log file. The message
suggest Cassandra host server machine is acting up and throwing messages like:
18/06/25 14:07:44 WARN Session: Error creating po
Hi,
We use a pseudo file-system table where the chunks are blobs of 64 KB and
we never had any performance issue.
Primary-key structure is ((file-uuid), chunck-id).
Jero
On Wed, Apr 4, 2018 at 9:25 AM, shalom sagges
wrote:
> Hi All,
>
> A certain application is writing ~55,000 chara
Jeff and Christophe,
Thank you very much ! I'll take a look.
Jero
On Sun, Mar 25, 2018 at 10:21 PM, Jeff Jirsa wrote:
> Probably closer to https://issues.apache.org/jira/browse/CASSANDRA-13289
>
>
> Will be in 4.0
> --
> Jeff Jirsa
>
>
> On Mar 25, 2018
I'd like to know if there is a reasonable method to measure how long take
to have the data available across all replica nodes in a multi DC
environment using LOCAL_ONE or LOCAL_QUORUM consistency levels.
If already there be a study about this topic in some place and someone
could point m
No. I inserted using USING TTL 86400;
On Monday, February 26, 2018, 11:45:07 PM PST, Oleksandr Shulgin
wrote:
On Tue, Feb 27, 2018 at 7:37 AM, A wrote:
I started going through the logs and haven't noticed anything yet... Very
unexpected behavior.
Maybe I'm asking the ob
Problems in Production
Nicolas,
I think you had the link to the other version I was thinking of. I couldn’t
find it. I think it might have gotten taken down; a lot of other stuff seems
to be gone too. Maybe it will be back. Maybe they are just redoing stuff.
Either way, it’s another sign of Mom
Can you check if you’ve enough disk space available ?
~Asad
From: mahesh rajamani [mailto:rajamani.mah...@gmail.com]
Sent: Tuesday, February 27, 2018 10:11 AM
To: user@cassandra.apache.org
Subject: Cassandra Daemon not coming up
I am using Cassandra 3.0.9 version on a 12 node cluster. I have
as well as through node.js.
I started going through the logs and haven't noticed anything yet... Very
unexpected behavior.
Thanks.A
Sent from Yahoo Mail for iPad
On Monday, February 26, 2018, 9:23 PM, @Nandan@
wrote:
Hi A,As I am able to understand your question :-1) You inserted s
I'm new to Cassandra. Trying it out to see if it will work for my upcoming
project. I created a test keyspace and table on my dev laptop. Loaded it with
some data on a Friday and closed her down. Returned on Monday and looked up
the data and it was gone. The keyspace and table was
M
To: user@cassandra.apache.org
Subject: Re: Old tombstones not being cleaned up
I, almost, tried that today :) I ran a repair, changed the compaction algorithm
from leveled to sizetierd and back. This definitely forced a compaction, but
the tombstones are still there.
Will setting
You may want to upgrade python and java/JDK version with Cassandra upgrade.
please refer to CHANGES.txt for all updates & improvement made in your selected
3.x version.
From: William Boutin [mailto:william.bou...@ericsson.com]
Sent: Thursday, February 01, 2018 4:49 PM
To: user@cassandra.apache
, 2018 at 11:35 PM Bo Finnerup Madsen
mailto:bo.gunder...@gmail.com>> wrote:
Hi,
We are running a small 9 node Cassandra v2.1.17 cluster. The cluster generally
runs fine, but we have one table that are causing OOMs because an enormous
amount of tombstones.
Looking at the data in the
omain Gerard [mailto:romain.ger...@erebe.eu]
Sent: Wednesday, January 10, 2018 9:06 AM
To: user@cassandra.apache.org
Subject: [announce] Release of Cassandra Prometheus metrics exporter
Hello C*,
A little mail to announce that we released today our internal tool at Criteo to
monitor Cassandra nodes
2:19 AM
To: user@cassandra.apache.org
Subject: Re: Connection refused - 127.0.0.1-Gossip
Thanks for any ideas/hints, any straw is worth checking at this point ☺
Well, the clusters “work”, data is correctly stored and queries. I’m interested
in why it tries to open a gossip to localhost, and what
Jens,
Al Tobey's Cassandra 2.1 tuning guide has excellents infos about running
Cassandra. Apparently he uses Arch Linux and we've been using Slackware
Linux in a 12 node cluster (2 DCs 6/6) for the last 3 years with no
problems.
https://tobert.github.io/pages/als-cassandra-21-tuning-
Hello folk,
I'm wondering if there is way to find out list of table(s) which need repair OR
if there Is way to find out what %age of data would need to be repaired on a
table? Is such information available from Cassandra db engine through some
other means?
TIA~ Asad
Hello,
It's a bit old but at least for me, still a great guide:
https://tobert.github.io/pages/als-cassandra-21-tuning-guide.html
My 2 cents: We deal with electronic invoices and our load is about 10,000
transactions/s during the peak housr.
We are not located in USA, so AWS would be
corporate
station_data 108 MB 267.68 MB bytes 40.35%
Active compaction remaining time :n/a
==
[cassandra@server]$ nodetool tpstats
Pool NameActive Pending Completed Blocked All
time blocked
MutationStage
satisfied)?
Sincerely,
Myron A. Semack
From: Jeff Jirsa [mailto:jji...@gmail.com]
Sent: Monday, September 18, 2017 6:02 PM
To: cassandra
Subject: Re: Re[6]: Modify keyspace replication strategy and rebalance the nodes
Using CL:ALL basically forces you to always include the first replica in the
How would setting the consistency to ALL help? Wouldn’t that just cause EVERY
read/write to fail after the ALTER until the repair is complete?
Sincerely,
Myron A. Semack
From: Jeff Jirsa [mailto:jji...@gmail.com]
Sent: Monday, September 18, 2017 2:42 PM
To: user@cassandra.apache.org
Subject
Restarting the Cassandra service resolved this issue. Thanks for your advice!
Sincerely,
Myron A. Semack
From: kurt greaves [mailto:k...@instaclustr.com]
Sent: Tuesday, August 15, 2017 6:10 PM
To: User
Subject: Re: Attempted to write commit log entry for unrecognized table
what does nodetool
n cqlsh 5.0.1). Best I can offer is
https://docs.datastax.com/en/ cql/3.3/cql/cql_reference/ cqlshExpand.html
> On 14 Aug 2017, at 16:17, Jim Witschey wrote:
>
> Not knowing the problem you're trying to solve, I'm going to guess
> cqlsh is a bad tool for this job. If you wan
We have a Cassandra 2.2.10 cluster of 9 nodes, hosted in AWS. One of the nodes
had a problem where it ran out of space on its root volume (NOT the Cassandra
volume which holds the Cassandra data and commit logs). I resolved the issue
with free space on the root volume and restarted the node
I have column values with Pipe separator, hence unable to replace this default
delimiter from the output.
Thanks Hari
On Monday, August 14, 2017 12:12 AM, algermissen1971
wrote:
On 14.08.2017, at 07:49, Harikrishnan A wrote:
Hello,
When I execute cqlsh -e "SELECT stat
Hello,
When I execute cqlsh -e "SELECT statement .." , it gives the output with a
pipe ('|') separator. Is there anyway I can change this default delimiter in
the output of cqlsh -e " SELECT statement ..".
Thanks & Regards,Hari
Hello Folks,
I’m using Cassandra 2.2 on 14 node cluster.
Now a days, I’m observing memtablepostflush pending number going high , this
happens intermittently. I’m looking if Is there way to ‘tune’
memtablepostflush stage?
Thanks/ASad
causing the failure and network is supposedly stable.
~Asad
-Original Message-
From: Micha [mailto:mich...@fantasymail.de]
Sent: Tuesday, August 08, 2017 8:35 AM
To: user@cassandra.apache.org; ZAIDI, ASAD A ;
user@cassandra.apache.org
Subject: Re: rebuild constantly fails, 3.11
no, I have
build constantly fails, 3.11
Hi,
it seems I'm not able to add add 3 node dc to a 3 node dc. After starting the
rebuild on a new node, nodetool netstats show it will receive 1200 files from
node-1 and 5000 from node-2. The stream from
node-1 completes but the stream from node-2 allways fails, after
Hi folks, I’ve question on upgrade method I’m thinking to execute.
I’m planning from apache-Cassandra 2.2.8 to release 3.10.
My Cassandra cluster is configured like one rack with two Datacenters like:
1. DC1 has 4 nodes
2. DC2 has 16 nodes
We’re adding another 12 nodes and would
Are you using same number of token/vnodes in both data centers?
From: Chuck Reynolds [mailto:creyno...@ancestry.com]
Sent: Monday, August 07, 2017 1:51 PM
To: user@cassandra.apache.org
Subject: Different data size between datacenters
I have a cluster that spans two datacenters running Cassandra
rted every 5000ms.
If you are looking to tweak the number of ms after which a message is
considered dropped then you need to use the write_request_timeout_in_ms. The
write_request_timeout_in_ms
(http://docs.datastax.com/en/cassandra/2.1/cassandra/configuration/configCassandra_yaml_r.html<https://u
Hi Akhil,
Thank you for your reply. Previously, I did ‘tune’ various timeouts – basically
increased them a bit but none of those parameter listed in the link matches
with that “were dropped in last 5000 ms”.
I was wondering from where that [5000ms] number is coming from when, like I
mentioned
cross node
timeout
In a cloud environment, cross_node_timeout = true can cause issues; we had this
issue in our environment and it is set to false now.
Dropped messages is an another issue
Subroto
On Jul 20, 2017, at 8:27 AM, ZAIDI, ASAD A
mailto:az1...@att.com>> wrote:
Hello Folks –
I’m
optimal.
Thank you again.
From: Anuj Wadehra [mailto:anujw_2...@yahoo.co.in]
Sent: Thursday, July 20, 2017 12:17 PM
To: ZAIDI, ASAD A ; user@cassandra.apache.org
Subject: Re: MUTATION messages were dropped in last 5000 ms for cross node
timeout
Hi Asad,
You can do following things:
1
Hello Folks -
I'm using apache-cassandra 2.2.8.
I see many messages like below in my system.log file. In Cassandra.yaml file [
cross_node_timeout: true] is set and NTP server is also running correcting
clock drift on 16node cluster. I do not see pending or blocked HintedHandoff
in tpstats out
Hi Folks,
Pardon me if I’m missing something obvious. I’m still using apache-cassandra
2.2 and planning for upgrade to 3.x.
I came across this jira [https://issues.apache.org/jira/browse/CASSANDRA-7032]
that suggests reducing num_token may improve general performance of Cassandra
like having
>> I analysed the GC logs not having any issues with major GC's
If you don’t have issues on GC , than why do you want to [tune] GC
parameters ?
Instead focus on why select queries are taking time.. may be take a look on
their trace?
From: Pranay akula [mailto:pr
What exactly does mean CoordinatorScanLatency for example
CoordinatorScanLatency is a timer metric that present coordinator range scan
latency for table.
Is it latency on full table scan or maybe range scan by clustering key?
It is range scan.. clustering key is used to only
your
tables with [tombstones], A quick [grep –i tombstone /path/to/system.log]
command would tell you what objects are suffering with tombstones!
From: Karthick V [mailto:karthick...@zohocorp.com]
Sent: Monday, July 03, 2017 11:47 AM
To: user
Subject: Re: Node failure Due To Very high GC pa
Hello Folks,
I’m on Cassandra 2.2.8 cluster with 14 nodes , each with around 2TB of data
volume. I’m looking for a criteria /or data points that can help me decide when
or if I should add more nodes to the cluster and by how many nodes.
I’ll really appreciate if you guys can share your
BIGINT,
"body" TEXT,
PRIMARY KEY ("groupId","createTime","mailId")
)WITH CLUSTERING ORDER BY ("createTime" DESC);
This table is frequency updated (250K per second) and each between 10-1000 new
record is inserted in each &
adding multiple nodes at once tax system more and caused me issues on existing
nodes. I prefer to add one node at a time …
From: techpyaasa . [mailto:techpya...@gmail.com]
Sent: Tuesday, June 20, 2017 9:32 AM
To: user@cassandra.apache.org
Subject: Best practice to add(bootstrap) multiple nodes
repair data your secondary index will NOT be
automatically repaired so you’ll need to maintain them
On each cluster node. Depending on size of your cluster that could be a
significant effort. Be prepared to rebuild your new index (nodetool
rebuild_index) as often as you change the data
!
From: Mark Furlong [mailto:mfurl...@ancestry.com]
Sent: Monday, June 19, 2017 2:28 PM
To: user@cassandra.apache.org
Subject: Adding nodes and cleanup
I have added a few nodes and now am running some cleanups. Can I add an
additional node while these cleanups are running? What are the ramifications
pair --in-local-dc --partitioner-range” and
"nodetool repair --in-local-dc”
Since 2.2 I believe inc repairs are the default - that seems to be confirmed in
the logs that list the repair details when a repair starts.
2) From looks at a few runsr, on average:
with -pr repairs, each node is appr
If you’re only creating index so that your query work, think again! You’ll be
storing secondary index on each node , queries involving index could create
issues (slowness!!) down the road the when index on multiple node Is involved
and not maintained! Tables involving a lot of inserts/delete
ttps://stackoverflow.com/questions/20512710/cassandra-has-a-limit-of-2-billion-cells-per-partition-but-whats-a-partition]
From: Thakrar, Jayesh [mailto:jthak...@conversantmedia.com]
Sent: Wednesday, June 14, 2017 3:14 PM
To: User
Subject: Question: Large partition warning
We are on Cassandra 2.2.5 a
Hi folks,
I’m using apache Cassandra 2.2.
Instance is configured with max_heap_size set at 16G, memtable_allocation_type
is offheap_objects – total available memory is 62G on the server.
There is nothing but Cassandra is running on my Linux server.
My Cassandra instance is consuming all availa
Check status of load with nodetool status command. Make sure your there isn’t
huge number of pending compactions for your tables. Ideally speaking data
distribution should be even across your nodes.
you should have reserved extra 15% of free space relative to your maximum size
of your table i.e
cation dirvers are
configuared to use LOCAL_SERIAL.
As we are adding multiple nodes at a time we used option
"-Dcassandra.consistent.rangemovement=false" we added all nodes with gap of 10
mins each
We are facing lot of timeouts more 30k transactions over 8 hours of period . i
problem)
not evenly, i have setup a new cluster with subset of data (around 5gb). using
the configuration above I am getting these results
Datacenter: datacenter1
===
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns
Hello Folks,
I'm adding another node on my 14 node open source apache cassandra 2.2.8
cluster. New node is taking long time to join the cluster.
I see there are bunch of pending [memtablepostflush] threads. I did increase
memtable_flush_writers from 8 to 24 , though it is not helping with situa
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