By any chance is a TTL (time to live ) set on the columns...
Date: Tue, 25 Sep 2012 19:56:19 -0700
Subject: 1.1.5 Missing Insert! Strange Problem
From: gouda...@gmail.com
To: user@cassandra.apache.org
Hi All,
I have a 4 node cluster setup in 2 zones with NetworkTopology strategy and
strategy
No. We don't use TTLs.
On Tue, Sep 25, 2012 at 11:47 PM, Roshni Rajagopal
roshni_rajago...@hotmail.com wrote:
By any chance is a TTL (time to live ) set on the columns...
--
Date: Tue, 25 Sep 2012 19:56:19 -0700
Subject: 1.1.5 Missing Insert! Strange Problem
Some additional information: I already read about Embedding
http://wiki.apache.org/cassandra/Embedding however that doesn't seem a
rock solid solution to me. The word volatile is not really comforting me
;-)
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E
Actually an easy way to put cassandra down is
select count(*) from A limit 1000
CQL will read everything into List to make latter a count.
2012/9/26 aaron morton aa...@thelastpickle.com
Can you provide some information on the queries and the size of the data
they traversed ?
The default
The Cassandra Operations page
(http://wiki.apache.org/cassandra/Operations) says:
Unless your application performs no deletes, it is vital that production
clusters run nodetool repair periodically on all nodes in the cluster. The
hard requirement for repair frequency is the value used for
I guess, you can always open/maintain a socket with running cassandra
daemon and have a control over specific column families/keyspace or server
itself.
-Vivek
On Wed, Sep 26, 2012 at 12:51 PM, Robin Verlangen ro...@us2.nl wrote:
Some additional information: I already read about Embedding
Do you have any ideas how to do this Vivek?
Best regards,
Robin Verlangen
*Software engineer*
*
*
W http://www.robinverlangen.nl
E ro...@us2.nl
http://goo.gl/Lt7BC
Disclaimer: The information contained in this message and attachments is
intended solely for the attention and use of the named
if i am getting it correctly, then what you need to do is open a connection
with cassandra daemon thread and access via client API, Have a look at:
https://github.com/impetus-opensource/Kundera/blob/trunk/kundera-cassandra/src/test/java/com/impetus/client/persistence/CassandraCli.java
here,
I think this JIRA answers your question:
https://issues.apache.org/jira/browse/CASSANDRA-2610
which in order not to duplicate work (creation of Merkle trees) repair
is done on all replicas for a range.
Cheers,
Omid
On Tue, Sep 25, 2012 at 8:27 AM, Sergey Tryuber stryu...@gmail.com wrote:
Hi
You're mistaking 'key validation class' and 'comparator'. It is your
key validation class that is DecimalType. Your comparator is UTF8Type,
and yes, switching the comparator from UTF8Type to DecimalType is not
allowed.
--
Sylvain
On Tue, Sep 25, 2012 at 10:13 PM, Hiller, Dean
On Wed, Sep 26, 2012 at 2:35 AM, Rob Coli rc...@palominodb.com wrote:
150,000 sstables seem highly unlikely to be performant. As a simple
example of why, on the read path the bloom filter for every sstable
must be consulted...
Unfortunately that's a bad example since that's not true.
Leveled
We were consistently getting this exception over and over as we put data into
the system. A reboot caused it to go away but we don't want to be rebooting in
the future….
1. When does this occur?
2. Is it affecting my data put? (I have seen other weird validation
exceptions where my data
bump
On 9/25/12 2:40 PM, Hiller, Dean dean.hil...@nrel.gov wrote:
Hmmm, is rowkey validation asynchronous to the actually sending of the
data to cassandra?
I seem to be able to put an invalid type and GET that invalid data back
just fine even though my key type was an int and the key comparator
The DistributedDeletes link in that section explains the root reason for
needing to do this. It's not that deletes are forgotten, it's that a write
(deletes are basically tombstone writes) didn't get replicated to all
replicas. For example, at RF=3, write consistency level QUORUM, if one of
the
Hello everybody!
I have 3 node cluster with replication factor of 3.
each node has 800G disk and it used to have 100G of data.
What is strange every time I run repair data takes almost 3 times more
- 270G, then I run compaction and get 100G back.
Unfortunately, yesterday I forget to compact and
On Wed, Sep 26, 2012 at 6:05 AM, Sylvain Lebresne sylv...@datastax.com wrote:
On Wed, Sep 26, 2012 at 2:35 AM, Rob Coli rc...@palominodb.com wrote:
150,000 sstables seem highly unlikely to be performant. As a simple
example of why, on the read path the bloom filter for every sstable
must be
Cassandra is a distributed database meant to run across multiple systems.
Is your existing Java application distributed as well? Does maintain
control mean exclude end users from connecting to it and making changes
or merely provisioning and keep it running well operationally for the
application?
Thank you both for your reply.
We're not a 100% sure yet about what to use. The application itself is just
as distributed as Cassandra is. It also embeds ElasticSearch.
At this point I only see the ring as a real pain in the ass, as I have to
automatically move nodes around to prevent unbalanced
On Wed, Sep 26, 2012 at 9:30 AM, Andrey Ilinykh ailin...@gmail.com wrote:
[ repair ballooned my data size ]
1. Why repair almost triples data size?
You didn't mention what version of cassandra you're running. In some
old versions of cassandra (prior to 1.0), repair often creates even
more
Hi,
I'm running a bunch of integration tests using an embedded cassandra
instance via the Cassandra Maven Plugin v1.0.0-1, using Hector v1.0-5.
I've got an issue where one of the tests is using a StringKeyIterator to
iterate over all the keys in a CF, but it gets TimedOutExceptions every
time
What is strange every time I run repair data takes almost 3 times more
- 270G, then I run compaction and get 100G back.
https://issues.apache.org/jira/browse/CASSANDRA-2699 outlines the
maion issues with repair. In short - in your case the limited
granularity of merkle trees is causing too much
Hi,
I'm trying to figure out what's going on with my cassandra/hadoop/pig
system. I created a mini copy of my main cassandra data by randomly
subsampling to get ~50,000 keys. I was then writing pig scripts but also
the equivalent operation using simple single threaded code to double check
pig.
That looks right to me.
btw, most people use CLI or CQL scripts to manage the schema
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 25/09/2012, at 7:59 PM, Manu Zhang owenzhang1...@gmail.com wrote:
Is there an example to update
On Wed, Sep 26, 2012 at 11:07 AM, Rob Coli rc...@palominodb.com wrote:
On Wed, Sep 26, 2012 at 9:30 AM, Andrey Ilinykh ailin...@gmail.com wrote:
[ repair ballooned my data size ]
1. Why repair almost triples data size?
You didn't mention what version of cassandra you're running. In some
old
But the Load keeps on increasing.
Sounds like the nodes are / were sending it data.
nodetool netstats will show you what's going on.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 25/09/2012, at 10:22 PM, Satoshi Yamada
Sounds very odd.
Is read performance degrading _after_ repair and compactions that normally
result have completed ?
What Compaction Strategy ?
What OS and JVM ?
What are are the bloom filter false positive stats from cf stats ?
Do you have some read latency numbers from cfstats ?
Also,
Set the caching strategy for the CF to be ROWS_ONLY.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 26/09/2012, at 2:18 PM, Manu Zhang owenzhang1...@gmail.com wrote:
The DEFAULT_CACHING_STRATEGY is Caching.KEYS_ONLY but even configuring
We are streaming data with 1 stream per 1 CF and we have 1000's of CF. When
using the tools they are all geared to analyzing ONE column family at a time
:(. If I remember correctly, Cassandra supports as many CF's as you want,
correct? Even though I am going to have tons of funs with
Hi Guys,
Wondering what would be the best way to model a flat (no sub comments, i.e.
twitter) comments list with support for voting (where I can sort by create time
or votes) in Cassandra?
To demonstrate:
Sorted by create time:
- comment 1 (5 votes)
- comment 2 (1 votes)
- comment 3 (no
We have paid tool capable of downgrading cassandra 1.2, 1.1, 1.0, 0.8.
Depending on your needs, you could simply duplicate the comments in two
separate CFs with the column names including time in one and the vote in
the other. If you allow for updates to the comments, that would pose
some issues you'd need to solve at the app level.
On 9/26/12 4:28 PM, Drew
I mean I have modifications only on one column; do I have to add the rest
columns as well?
On Thu, Sep 27, 2012 at 5:18 AM, aaron morton aa...@thelastpickle.comwrote:
That looks right to me.
btw, most people use CLI or CQL scripts to manage the schema
Cheers
-
Aaron
The node tool cfstats, what is the row count estimate usually off by(what
percentage? Or what absolute number?)
We have a CF with 4 rows that prints this out….
Column Family: bacnet11700AnalogInput8
SSTable count: 3
Space used (live): 13526
I still don't see it in jconsole. BTW, how long would you expect to cost to
read a column family of 15 rows if it fits into row cache entirely? It
takes me around 7s now. My experiment is done on a single node.
On Thu, Sep 27, 2012 at 6:00 AM, aaron morton aa...@thelastpickle.comwrote:
Set
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