Casting a second vote for Jon Haddad. You can reach out to him on LinkedIn:
https://www.linkedin.com/in/rustyrazorblade/
Thanks,
Aaron
On Fri, Sep 27, 2024 at 3:57 AM guo Maxwell wrote:
> I want to at Jon Haddad 😁
>
> Bowen Song via user 于2024年9月27日周五 16:39写道:
>
>> Hel
Nice! This sounds awesome, Jon.
On Mon, Apr 29, 2024 at 6:25 PM Jon Haddad wrote:
> Hey everyone,
>
> I'm doing a 4 week YouTube series on the C* storage engine. My first
> video was last week where I gave an overview into some of the storage
> engine internals [1].
>
> The next 3 weeks are loo
Just a heads-up, but there have been issues (at least one) reported when
upgrading a multi-DC cluster from 3.x to 4.x when the cluster uses
node-to-node SSL/TLS encryption. This is largely attributed to the fact
that the secure port in 4.x changes to 9142, whereas in 3.x it continues to
run on 9042
-16895 <https://issues.apache.org/jira/browse/CASSANDRA-16895>.
Its current status is "In Progress," which suggests that there may be some
issues that haven't been resolved. I'd suggest keeping an eye on that
ticket, as that should give you a pulse on this issue.
Thanks,
A
that?
>
> Re the racks. I just asked that question on this list and the answer was
> that adding the new nodes as rack4, rack5 and rack6 is fine. They are all
> on separate physical racks. Is that ok?
>
> On Mon, Apr 3, 2023 at 5:16 PM Aaron Ploetz wrote:
>
>> The time it
The time it takes to stream data off of a node varies by network, cloud
region, and other factors. So it's not unheard of for it to take a bit to
finish.
Just thought I'd mention that auto_bootstrap is true by default. So if
you're not setting it, the node should bootstrap as long as it's not a
Under the premise of an Accord transaction, how does replica/elector
selection happen? Does it choose replicas based on the partition keys? Or
is there another way?
Thanks!
Aaron
So if I remember right, setting compaction_throughput_per_mb to zero
effectively disables throttling, which means cleanup and compaction will
run as fast as the instance will allow. For normal use, I'd recommend
capping that at 8 or 16.
Aaron
On Thu, Feb 16, 2023 at 9:43 AM Marc Hoppins
>
> We are going to have our first gathering next Wednesday at 8AM PT
I'd like to help out, too, if you wouldn't mind forwarding that meeting on
to me.
Thanks,
Aaron
everything is working.
Thanks again, Cheng!
Aaron
On Fri, Oct 21, 2022 at 9:48 AM Aaron Ploetz wrote:
> Awesome. Thank you, Cheng! I’ll give this a shot and let you know.
>
> Thanks,
>
> Aaron
>
>
> On Oct 21, 2022, at 12:45 AM, Cheng Wang wrote:
>
>
> Hi
Awesome. Thank you, Cheng! I’ll give this a shot and let you know.
Thanks,
Aaron
> On Oct 21, 2022, at 12:45 AM, Cheng Wang wrote:
>
>
> Hi Aaron,
>
> After reading through the code, I finally figured out the issue. So back to
> your original question where you f
No worries, Cheng!
So I actually pivoted a little and adjusted my example table to use a
single integer-based partition key.
aaron@cqlsh:stackoverflow> SELECT ks_name, table_name, blobAsint(key) FROM
system_distributed.partition_denylist WHERE ks_name='stackoverflow' A
Just checking, but for this to work, do I have to mess with these settings
in the YAML at all?
partition_denylist_enabled: true
denylist_reads_enabled: true
They're commented out by default.
Thanks,
Aaron
On Mon, Oct 17, 2022 at 4:53 PM Aaron Ploetz wrote:
> Thanks for the help
0. Here's what I've got out there so
far:
aaron@cqlsh:stackoverflow> select ks_name, table_name, blobAsText(key) from
system_distributed.partition_denylist;
ks_name | table_name | system.blobastext(key)
---+-+-
tKey with 4 parameters doesn't
exist in bean org.apache.cassandra.db:type=StorageProxy
Obviously, it's reading the space between "Minneapolis," and "MN" as a
delimiter. What's the right way to handle commas, spaces, and composite
keys for this?
Also, is there another way to accomplish this without using JMX?
Thanks,
Aaron
ve to
have you on as a guest.
Feel free to reach out to me at either address:
aaronplo...@gmail.com
aaron.plo...@datastax.com
Thanks!
Aaron
The Apache Cassandra® Corner podcast is available on most major podcast
platforms. It is intended to highlight cool use cases for Cassandra as well
as the folks in the community who implement them. If you would like to be a
guest on the podcast, please reach out to me!
Thanks,
Aaron
Ahh...yes, my default "aaron" user is indeed a SUPERUSER.
Ok, so I created a new, non-superuser and tried again...
> SELECT * FROm stackoverflow.movies WHERE title='Sneakers (1992)' ALLOW
FILTERING;
InvalidRequest: Error from server: code=2200 [Invalid query]
message=&qu
ILTERING;
id | genre | title
--++-
1396 | Crime|Drama|Sci-Fi | Sneakers (1992)
(1 rows)
Is there like some main "guardrails enabled" setting that I missed?
Thanks,
Aaron
Nothing to see here...because well, it's a podcast, right? But I did get to
spend some time with Patrick McFadin discussing our favorite database -
Apache Cassandra! Listen in as we talk a little about the early days of
Cassandra as well as the new, upcoming Cassandra 4.1 release.
https://anchor.f
ion of the cassandra-rackdc.properties
file into our node-add automation. That way it looks at the target
instance, and already knows which DC and rack to inject into the file.
Thanks,
Aaron
P.S. - When using the cassandra-rackdc.properties file, the prevailing
production wisdom has always been to
Maxn,
Ah! That's because I had to explicitly enable RSS in the settings. Doh!
Give that URL another shot and let me know if it doesn't work.
Thanks,
Aaron
On Wed, Jun 1, 2022 at 12:54 PM Max Campos wrote:
> Hi Aaron,
>
> Do you have the RSS feed URL handy? I looked a
-corner/episodes/ep1---Lakhan-Samani-Authorizer-e1j10hv
This podcast is intended to highlight cool use cases for Cassandra and the
folks in the Apache Cassandra community who implement them. If you would
like to be a guest on the podcast, please reach out to me.
Thanks everyone,
Aaron
the user starting Cassandra has access to /var/run/casandra/
.
Aaron
On Wed, Feb 9, 2022 at 9:53 AM Bowen Song wrote:
> Isn't the /etc/init.d/cassandra script supposed to create the PID file if
> it doesn't exist? See:
> https://github.com
When I was at Target, we had a lot of success with Rundeck. It was a quick
way to push out changes to hundreds of clusters.
https://www.rundeck.com/open-source
On Mon, Oct 18, 2021 at 12:19 PM Yakir Gibraltar wrote:
> We manage via Puppet: https://github.com/voxpupuli/puppet-cassandra
>
> On
In reading the Jira ticket, I see this line:
"a server or client may run into an endless loop *when fed with specific
input data.*"
That seems to suggest that if the cassandra.yaml contains start_rpc: false,
you should be ok.
On Mon, Oct 4, 2021 at 8:12 PM rammohan ganapavarapu <
rammohanga...@g
Yes, you absolutely can (and should) use NetworkTopologyStrategy with a
single data center. In fact, I would argue that SimpleStrategy should
almost never be used. But that's just me.
Thanks,
Aaron
On Sat, Dec 19, 2020 at 3:21 AM Manu Chadha wrote:
> Is it possibl
Deepak,
Can you reply with:
1) The query you are trying to run.
2) The table definition (PRIMARY KEY, specifically).
3) Maybe a little description of what the table is designed to do.
4) How much data you're expecting returned (both # of rows and data size).
Thanks,
Aaron
On Mon, S
primary key ((partition_key, clustering_key))
Also, this primary key definition does not define a partitioning key and a
clustering key. It defines a *composite* partition key.
If you want it to instantiate both a partition and clustering key, get rid
of one set of parens.
primary key (partitio
ing does. You can't just
pick-and-choose.
Regards,
Aaron
On Tue, Jun 2, 2020 at 1:31 AM onmstester onmstester
wrote:
> I just changed these properties to increase flushed file size (decrease
> number of compactions):
>
>- memtable_allocation_type from heap_buffers to offh
nt doesn't appear to be in any discernable order
until you apply the token function to it.
Aaron
On Sun, Jul 15, 2018 at 8:05 AM, Soheil Pourbafrani
wrote:
> To the point, Thanks!
>
> On Sun, Jul 15, 2018 at 4:31 PM, shalom sagges
> wrote:
>
>> The clustering column is or
Unsubscribe
On Mon, Sep 11, 2017 at 4:48 PM, Paul Pollack
wrote:
> Hi,
>
> We run 48 node cluster that stores counts in wide rows. Each node is using
> roughly 1TB space on a 2TB EBS gp2 drive for data directory and
> LeveledCompactionStrategy. We have been trying to bootstrap new nodes that
> u
r external cloud providers.
Hope that helps,
Aaron
On Thu, Dec 22, 2016 at 9:51 AM, Shalom Sagges
wrote:
> Thanks Vladimir!
>
> I guess I'll just have to deploy and continue from there.
>
>
>
>
> Shalom Sagges
> DBA
> T: +972-74-700-4035 <+972%2074-700-4035&g
ava driver.
Aaron
On Fri, Jun 24, 2016 at 11:09 AM, Jonathan Haddad wrote:
> +1, do not use Hector. It hasn't had a commit in years and uses the thrift
> protocol which is now marked deprecated. The DataStax Java driver is
> recommended, possibly with Achilles to make things a bit
You can do this with two nodetool commands:
nodetool compactionstats will check on active Merkle Tree calculations.
nodetool netstats will list out any active repair streams.
Aaron Morton posted a Bash script/command a while back that you can just
paste into the (linux) command line to monitor
can then delete ledger entries if
needed. Don’t forget to ensure that only one client thread is doing this at a
time.
Hope that helps.
Aaron
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
sult in part of the JVM being swapped out, especially with mmapped
> I/O enabled.
> Increase RLIMIT_MEMLOCK or run Cassandra as root.
Is there anything in the system logs ?
Cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cas
do to contribute to the health of the project.
Cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 24/05/2014, at 7:28 am, Michael Shuler wrote:
> On 05/23/2014 01:23 PM, Peter Li
running ParNew ? (it only logs when
it’s longer than 200ms)
Cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 23/05/2014, at 10:35 pm, Alexey Sverdelov
wrote:
> Hi all,
&g
tell you the compression ratio.
Hope that helps.
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 23/05/2014, at 9:46 am, Phil Luckhurst
wrote:
> Hi Andreas,
>
> So does
ary key columns.
IMHO Wide partitions (storage engine rows) are more prevalent in CQL3 than
thrift models.
> But still - I do not see Iteration, so it looks to me that CQL 3 is limited
> when compared to CLI/Hector.
Now days you can do pretty much everything you can in cli. Provide
ce is
probably what you consider to “working” to mean. The token ranges are handled
the same, it’s the row in them that changes.
Cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
> so that this amount is predictable (like 5% of entire dataset)?
if you suppled a token range is that is 5% of the possible range of values for
the token that should be close to a random 5% sample.
Hope that helps.
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder &
In this case I was not thinking about what was happening synchronous to client
request, only that the request was hitting all nodes.
You are right, when reading at LOCAL_ONE the coordinator will only be blocking
for one response (the data response).
Cheers
Aaron
-
Aaron
> I get a lot of TExceptions
What are the exceptions ?
In general counters are slower than writes, but that does not lead them to fail
like that.
Check the logs for errors and/or messages from the GCInspector saying the
garbage collection is going on.
Cheers
A
-----
Aa
.
Hope that helps.
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 15/05/2014, at 3:55 am, Mark Farnan wrote:
> Yes they will
>
> From: ng [mailto:pipeli...@gmail.com]
&g
Calling execute the second time runs the query a second time, and it looks like
the query mutates instance state during the pagination.
What happens if you only call execute() once ?
Cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consul
pe and you have defined an
index on a column and specified the column name as “column1” which is not a
valid hex value.
You should be able to fix this by dropping the index or dropping the CF.
Hope that helps.
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-
rticular row.
In general you can improve throughput by having more client threads hitting
more machines. You can expect 3,000 to 4,000 non counter writes per code per
node.
Hope that helps.
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Princip
urrent design.
Cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 9/05/2014, at 1:07 am, Jabbar Azam wrote:
> Hello,
>
> Do people use counters when they want
.
Cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 8/05/2014, at 8:36 am, DuyHai Doan wrote:
> Hello Kevin
>
> You can disable compaction by configuring the compa
distributed.
Hope that helps.
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 12/05/2014, at 11:58 pm, Oleg Dulin wrote:
> I have a cluster that looks like this:
>
> Datace
> Is this normal or am I doing something wrong?.
probably this one.
But the TTL is set based on the system clock on the server, first through would
be to check the times are correct.
If that fails, send over the schema and the insert.
Cheers
Aaron
-----
Aaron Morton
> As of 2.0.7, driftx has added this long-requested feature.
Thanks
A
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 13/05/2014, at 9:36 am, Robert Coli wrote:
> On Mon, May 12,
ge tasks on the node you want to rebuild. If you have
read repair enabled it will still get some traffic.
* Do rebuild
* Reset severity to 0
Hope that helps.
Aaron
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http
) and
bootstrapping. I’d recommend testing a smaller cluster, say 12 nodes, with a
high load per node 3TB.
cheers
Aaron
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 9/05/2014, at 12:09
timeout and is generally not a recommended access pattern in
> Cassandra.
The Hadoop integration is token aware, it splits the tasks to run local on the
node. The tasks then scan over the token range local to the node.
Hope that helps.
A
-
Aaron Morton
New Zealand
@aaron
pace instead of multiple keyspaces to
> increase the write throughput?
>
>
You should expect to get 3,000 to 4,000 writes per core per node.
What are you getting now?
Cheers
A
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consul
ground. Setting this to 1.0 will mean it’s active across the entire cluster
for each read.
Change read_repair_chance to 0 and set dclocal_read_repair_chance to 0.1 so
that read repair will only happen local to the DC you are connected to.
Hope that helps.
A
-
Aaron Mort
?
> cpu load > 1000%
Is this all from cassandra ?
try jvmtop (https://code.google.com/p/jvmtop/) to see what cassandra threads
are doing.
It’s a lot easier to tune a system with fewer non default settings.
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Foun
the write path. So I would normally say make a new table to store the data
you want to read, or change the layout of a table to me more flexible.
Can you provide the table definition and the query you are using ?
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Pr
able to run repair. All nodes
have to use the same file version, file versions are here
https://github.com/apache/cassandra/blob/cassandra-1.2/src/java/org/apache/cassandra/io/sstable/Descriptor.java#L52
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Prin
.
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 12/01/2014, at 3:53 pm, Arun wrote:
> Hi ,
>
> I need your help & suggestions for our production issue.
>
> Details:
> --
>> But i am getting error: Bad Request: Key may not be empty
My guess is the trigger is trying to create a row with an empty key.
Add some logging to the trigger to see what it’s doing.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consult
safe to set
> "read_repair_chance=0 & dclocal_read_repair_chance=0" in column family
> definition.
It’s safe, read repair does not affect consistency. It’s designed to reduce the
chance that the server will need to repair an inconsistency during a read for a
client.
Cheers
use repair to fix the data on disk.
Hope that helps.
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 9/01/2014, at 7:24 am, Robert Coli wrote:
> On Wed, Jan 8, 2014 at 1:17 AM, Jir
.org/jira/browse/CASSANDRA-3442
They cannot be forced, but if there is nothing else to compact they will look
for single sstables to compact.
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle
will also include information
about the number tombstones touched in a read.
Hope that helps.
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 8/01/2014, at 2:15 am, Jason Wee wrote:
> /**
. Try 2Gb so there is room for other things.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 7/01/2014, at 9:03 am, Erik Forkalsud wrote:
> On 01/04/2014 08:04 AM, Ertio Le
Owns is how much of the entire, cluster wide, data set the node has. In both
your examples every node has a full copy of the data.
If you have 6 nodes and RF 3 they would have 50%.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Ap
blog posts at datastax.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 2/01/2014, at 7:08 pm, Jason Wee wrote:
> Solely by the Cassandra version. Are you asking about a par
about the file.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 30/12/2013, at 1:28 pm, David McNelis wrote:
> I am currently running a cluster with 1.2.8. One of my larger
r, maybe behind an “Advanced” button.
The Ops Centre agent talks to the server to find out what JMX port it should
use to talk to the local Cassandra install.
Also check the logs in /var/log/datastax
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consu
n bulk load them into the destination system.This will be much faster.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 29/12/2013, at 6:26 am, Edward Capriolo wrote:
> Internally w
a
single row. Can you provide some more info on what you are doing ?
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 26/12/2013, at 9:56 pm, mete wrote:
> Hello folks,
>
&
the same as the one in the
cassandra lib on the server.
Can you do some simple tests using cqlsh from the client machine? That would
eliminate the client driver.
Hope that helps.
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandr
You will need to paginate the list of keys to read in your app.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 21/12/2013, at 12:58 pm, Parag Patel wrote:
> Hi,
>
&
lot of CF’s and/or secondary indexes.
Hope that helps.
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 21/12/2013, at 6:03 am, Ken Hancock wrote:
> I ended up changing memtable_flush_
isting, it should settle down once compaction
catches up.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 20/12/2013, at 10:51 pm, Andreas Finke wrote:
> Hi Aaron,
>
> I assume y
If this is still a concern can you post the output from nodetool gossipinfo ?
It will give the details of the nodes think of the other ones.
A
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
get to start the write.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 20/12/2013, at 10:05 am, Demian Berjman wrote:
> Hi. I am using Cassandra 2.0.3 with Datastax Java client.
elay in other nodes knowing
it is down.
If you stop gossip (nodetool disablegossip) the node will cancel the gossip
thread (without interrupting), wait two seconds, then inform other nodes it’s
leaving gossip.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder &am
odels.
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 20/12/2013, at 7:22 am, Kumar Ranjan wrote:
> Rob - I got a question following your advice. This is how, I defi
> First approach:
Sounds good.
> Second approach ( I used in production ):
If the row gets big enough this will have bad performance.
A
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.
ers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 19/12/2013, at 11:38 pm, Jason Wee wrote:
> Hi,
> In regards to recv_get_range_slices(), in my cassandra client code, it always
nodetool proxyhistograms shows the throughput for the node, nodetool
cfhistograms shows it for a single node.
If you want to get an overview install something like Ops Centre
http://www.datastax.com/what-we-offer/products-services/datastax-opscenter
Cheers
-
Aaron Morton
New
w low the total heap use get’s to after CMS.
JVM_OPTS="$JVM_OPTS -XX:SurvivorRatio=4"
JVM_OPTS="$JVM_OPTS -XX:MaxTenuringThreshold=2"
JVM_OPTS="$JVM_OPTS -XX:CMSInitiatingOccupancyFraction=50”
Hope that helps.
-
Aaron Morton
New Zealand
@aaronmorton
Co-Fou
It depends a little on the nature of the change, but you need some coordination
between the schema change and your code. e.g. add new column, change code to
write to it or add new column, change code to use new column and not old
column, remove old column.
Cheers
-
Aaron
u can reproduce this in a simple way please create a ticket at
https://issues.apache.org/jira/browse/CASSANDRA
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 19/12/2013, at 2:42 am,
??
>
>
Logging at the client level ?
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 18/12/2013, at 5:02 pm, Krishna Chaitanya wrote:
> Thanks for the reply. By pac
dary indexes are useful when you have a query
pattern that is used infrequently.
Hope that helps.
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 18/12/2013, at 3:47 am, Ondřej Černoš wrote:
&
-tmp- files will sit in the data dir, if there was an error creating them
during compaction or flushing to disk they will sit around until a restart.
Check the logs for errors to see if compaction was failing on something.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co
Try using jstack to see if there are a lot of threads there.
Are you using vNodea and Hadoop ?
https://issues.apache.org/jira/browse/CASSANDRA-6169
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
f you are
not seeing that it may be configuration or the client.
Hope that helps.
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 15/12/2013, at 7:51 pm, Krishna Chaitanya wrote:
> Hel
> Request did not complete within rpc_timeout.
The node is overloaded and did not return in time.
Check the logs for errors or excessive JVM GC and try selecting less data.
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Ca
n the two it’s wait time + network time.
As a general rule you should get around 3k to 4k writes per second per core.
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 13/12/201
nteger,
record_name text,
record_valueblob,
PRIMARY KEY (day, timestamp, record_name)
)
Store the day as MMDD and the timestamp as before, you can then do queries
like
select * from test1 where day = 20131218 and timestamp > X and timestamp < y;
Cheers
---
roved": "true"}'),])
>
> How can I set approved to 'false' ??
>
>
It looks like the value of the 411186035495010304 column is a string, to
cassandra that’s an opaque typer we do not make partial updates to.
If you need to update the values individually they need to
something like,
What client are you using ?
xget is not a standard cassandra function.
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 13/12/2013, at 4:56 am, Kumar Ranjan wrote:
cluster? If so they do
not bootstrap.
The extra writes in nodes 5 and 6 could be from Read Repair writing to them.
Cheers
-----
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 12/12/2013, a
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