Wouldn't you be better to delegate the compression part to Cassandra (which
support Snappy [1])? This way the compression part will be completely
transparent to your application.
[1] http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-compression
On Tue, Jan 28, 2014 at 8:51 PM, Check Pe
Hi Michael - Yes, 7000, 7001, 9042, 9160 are all open on EC2.
Issue was seeds address and listen_address were 127.0.0.1 and private_ip.
This will help anyone
http://stackoverflow.com/questions/20690987/apache-cassandra-unable-to-gossip-with-any-seeds
On Wed, Jan 29, 2014 at 1:12 AM, Michael Sh
Did you open up the ports so they can talk to each other?
http://www.datastax.com/documentation/cassandra/2.0/webhelp/index.html#cassandra/install/installAMISecurityGroup.html
--
Michael
Yes got rid of openJDK and installed oracle version and warning went away.
Happy happy...Thank you folks..
On Tue, Jan 28, 2014 at 11:59 PM, Michael Shuler wrote:
> On 01/28/2014 09:55 PM, Kumar Ranjan wrote:
>
>> I am in process of setting 2 node cluster with C* version 2.0.4. When I
>> started
Hey Folks - I am burning the midnight oil fast but cant figure out what I
am doing wrong? log files has this. I have also listed both seed node and
node 2 partial configurations.
INFO [main] 2014-01-29 05:15:11,515 CommitLog.java (line 127) Log replay
complete, 46 replayed mutations
INFO [main
On 01/28/2014 09:55 PM, Kumar Ranjan wrote:
I am in process of setting 2 node cluster with C* version 2.0.4. When I
started each node, it failed to communicate thus, each are running
separate and not in same ring. So started looking at the log files are
saw the message below:
This is probably j
I am working on a project in which I am supposed to store the snappy
compressed data in Cassandra, so that when I retrieve the same data from
Cassandra, it should be snappy compressed in memory and then I will
decompress that data using snappy to get the actual data from it.
I am having a byte arr
Open jdk has known issues and they will raise their ugly little head from time
to time-i have experienced them myself.
To be safe, I would use the latest oracle 7 release.
You may also be experiencing a configuration issue, make sure one node is
specified as the seed node and that the other nod
in my #2 example:
select * from people where company_id='xxx' and gender='male'
I already specify the first part of the primary key(row key) in my where
clause, so how does the secondary indexed column gender='male" help
determine which row to return? It is more like filtering a list of column
fro
I am in process of setting 2 node cluster with C* version 2.0.4. When I
started each node, it failed to communicate thus, each are running separate
and not in same ring. So started looking at the log files are saw the
message below:
WARN [main] 2014-01-28 06:02:17,861 CassandraDaemon.java (line 15
>
> Perhaps a log structured database with immutable data files is not best suited
> for this use case?
Perhaps not, but I have other data structures I¹m moving to Cassandra as
well. This is just the first. Cassandra has actually worked quite well for
this first step, in spite of it not being an
On Tue, Jan 28, 2014 at 2:16 PM, John Pyeatt wrote:
> Is there any way of resetting the value of a nodetool info Exceptions
> value manually?
>
> Is there a JMX call I can make?
>
Almost certainly not.
=Rob
Dimetrio,
Look at my last post. I showed you how to turn on all useful GC logging
flags. From there we can get information on why GC has long pauses. From
the changes you have made it seems you are changing things without knowing
the effect. Here are a few things to considenr:
- Having a 9GB NewG
Hey Naresh,
Unfortunately I don't have any further advice. I keep feeling like you're
looking at a search problem instead of a lookup problem. Perhaps Cassandra
is not the right tool for your need in this case. Perhaps something with a
full-text index type feature would help.
Or perhaps someone m
Is there any way of resetting the value of a nodetool info Exceptions value
manually?
Is there a JMX call I can make?
--
John Pyeatt
Singlewire Software, LLC
www.singlewire.com
--
608.661.1184
john.pye...@singlewire.com
I would do #2. Take a look at this blog which talks about secondary
indexes, cardinality, and what it means for cassandra. Secondary indexes
in cassandra are a different beast, so often old rules of thumb about
indexes don't apply. http://www.wentnet.com/blog/?p=77
On Tue, Jan 28, 2014 at 1
Sorry guys, I am confusing things with Hbase. But Nate's jira look sure
looks interesting thanks.
On Tue, Jan 28, 2014 at 12:25 PM, Edward Capriolo wrote:
> Some people had done some custom cassandra zookeper integration back in
> the day. Triggers, there is some reference in the original faceb
On Mon, Jan 27, 2014 at 11:40 PM, Lu, Boying wrote:
> When I read the codes of OutboundTcpConnection.expireMessages(), I found
> the following snippet in a loop:
>
> if (qm.timestamp >= System.currentTimeMillis() -
> qm.message.getTimeout())
>
> *return*;
>
>
>
> My understan
On Tue, Jan 28, 2014 at 7:57 AM, Robert Wille wrote:
> I have a dataset which is heavy on updates. The updates are actually
> performed by inserting new records and deleting the old ones the following
> day. Some records might be updated (replaced) a thousand times before they
> are finished.
>
I have a simple column family like the following
create table people(
company_id text,
employee_id text,
gender text,
primary key(company_id, employee_id)
);
if I want to find out all the "male" employee given a company id, I can do
1/
select * from people where company_id='
and loop through
Generally indexes on binary fields true/false male/female are not terrible
effective.
On Tue, Jan 28, 2014 at 12:40 PM, Jimmy Lin wrote:
> I have a simple column family like the following
>
> create table people(
> company_id text,
> employee_id text,
> gender text,
> primary key(company_id, em
Some people had done some custom cassandra zookeper integration back in the
day. Triggers, there is some reference in the original facebook thrown over
the wall to zk. No official release has ever used zk directly. Though
people have suggested it.
On Tue, Jan 28, 2014 at 12:08 PM, Andrey Ilinykh
Why would cassandra use zookeeper?
On Tue, Jan 28, 2014 at 7:18 AM, S Ahmed wrote:
> Does C* no long use zookeeper?
>
> I don't see a reference to it in the
> https://github.com/apache/cassandra/blob/trunk/build.xml
>
> If not, what replaced it?
>
please inputs on last email if any..
On Tue, Jan 28, 2014 at 7:18 AM, Naresh Yadav wrote:
> yes thunder you are right, i had simplified that by moving *tags
> *search(partial/exact)
> in separate column family tagcombination which will act as index for all
> search based on tags and in my my o
Hi Donald,
I was reporting the ticket you mentioned, so I kinds feel like I should
answer this :-)
I presume the point is that GCable tombstones can still do work
> (preventing spurious writing from nodes that were down) but only until the
> data is flushed to disk.
>
I am not sure I understand
AFAIK zookeeper was never in use. It was discussed once or twice over the
years, but never seriously.
If you are talking about the origins of the current lightweight
transactions in 2.0, take a look at this issue (warning - it's one of the
longer ASF jira issues I've seen, but some good stuff in t
LeveledCompactionStrategy is ideal for update heavy workloads. If you are
using a pre 1.2.8 version make sure you set the sstable_size_in_mb up to
the new default of 160.
Also, keep an eye on "Average live cells per slice" and "Average tombstones
per slice" (available in versions > 1.2.11 - so I g
I have a dataset which is heavy on updates. The updates are actually
performed by inserting new records and deleting the old ones the following
day. Some records might be updated (replaced) a thousand times before they
are finished.
As I watch SSTables get created and compacted on my staging serve
Does C* no long use zookeeper?
I don't see a reference to it in the
https://github.com/apache/cassandra/blob/trunk/build.xml
If not, what replaced it?
>
>
> I have actually set up one of our application streams such that the same
> key is only overwritten with a monotonically increasing ttl.
>
> For example, a breaking news item might have an initial ttl of 60 seconds,
> followed in 45 seconds by an update with a ttl of 3000 seconds, followed by
Thanks again Sylvain!
I have actually set up one of our application streams such that the same
key is only overwritten with a monotonically increasing ttl.
For example, a breaking news item might have an initial ttl of 60 seconds,
followed in 45 seconds by an update with a ttl of 3000 seconds, fo
On Tue, Jan 28, 2014 at 1:05 AM, Edward Capriolo wrote:
> If you have only ttl columns, and you never update the column I would not
> think you need a repair.
>
Right, no deletes and no updates is the case 1. of Michael on which I think
we all agree 'periodic repair to avoid resurrected columns'
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