If you join a node with auto_bootstrap=false you had better be working
at quorum or higher to avoid stale/not found reads. You should then
repair the node right away to get all the missing data back on the
node. This is not suggested. It is best to leave auto_boostrap=true
and let Cassandra h
I just discovered that using host names for seed nodes in cassandra.yaml
do not work. This is done on purpose?
I constantly see TimedOutException , then followed by
UnavailableException in my logs,
so I added some extra debugging to Gossiper. notifyFailureDetector()
void notifyFailureDetector(InetAddress endpoint, EndpointState
remoteEndpointState)
{
IFailureDetector fd = FailureDetector.
I see the following in my GC log
1910.513: [GC [1 CMS-initial-mark: 2598619K(26214400K)]
13749939K(49807360K), 6.0696680 secs] [Times: user=6.10 sys=0.00,
real=6.07 secs]
so there is a stop-the-world period of 6 seconds. does this sound bad
? or 6 seconds is OK and we should expect the built-in
thanks! is that similar problem described in this thread?
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/nodetool-repair-caused-high-disk-space-usage-td6695542.html
On Sun, Sep 25, 2011 at 11:33 AM, aaron morton wrote:
> It can result in a lot of data on the node you run repa
yes, I did. thought 0.8 is downward compatible. is there other ways to load
0.7's data into 0.8? will copy the data dir directly will work? I would
like to put load of three nodes into one node.
thanks!
On Sun, Sep 25, 2011 at 11:52 AM, aaron morton wrote:
> Looks like it is complaining tha
The changes in get_count() are designed to stop counts for very large rows
running out of memory as they try to hold millions of columns in memory.
So if you ask to count all the cols in a row with 1M cols, it will (by default)
read the first 1024 columns, and then the next 1024 using the last
Looks like it is complaining that you are trying to load a 0.7 SSTable in 0.8.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 23/09/2011, at 5:23 PM, Yan Chunlu wrote:
> sorry I did not look into it after check it I found
It can result in a lot of data on the node you run repair on. Where a lot means
perhaps 2 or more times more data.
My unscientific approach is to repair one CF at a time so you can watch the
disk usage and repair the smaller CF's first. After the repair compact if you
need to.
I think the a
No, Run it on one node at a time.
Looks like I was a little off on my previous statement. Perhaps it would have
been better to say if you have more than RF nodes run it on every RF'th node at
the same time. But make sure you run it on all nodes eventually.
Aaron
-
Aaron Mort
Thanks sylvain, will look into the new stuff.
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 22/09/2011, at 9:09 PM, Sylvain Lebresne wrote:
> 2011/9/22 Jonas Borgström :
>> On 09/22/2011 01:25 AM, aaron morton wrote:
>> *snip*
>>> Wh
I thought I would share something valuable that Jacob Perkins (who recently
started with us) shared. We were seeing blacklisted task trackers and
occasionally failed jobs. These were almost always based on TimedOutExceptions
from Cassandra. We've been fixing underlying reasons for those excep
I'm using 1.0.0
there seems to be too many node Up/Dead events detected by the failure
detector.
I'm using a 2 node cluster on EC2, in the same region, same security
group, so I assume the message drop
rate should be fairly low.
but in about every 5 minutes, I'm seeing some node detected as down
I did propotyping very small Cassandra data browser on top of Wicket and
Hector. Try it :) http://goo.gl/lozFo
On 23 September 2011 08:41, mcasandra wrote:
> Are there any tools that let you scroll over data in Cassandra in html or
> UI?
>
> We are planning to encrypt data before storing in cass
I found this in the system.log when adding a new node to the cluster.
Anyone familiar with this?
ERROR [HintedHandoff:2] 2011-09-24 18:01:30,498 AbstractCassandraDaemon.java
(line 113) Fatal exception in thread Thread[HintedHandoff:2,1,main]
java.lang.RuntimeException: java.lang.RuntimeException:
Eric Evans rackspace.com> writes:
>
> On Thu, 2010-12-02 at 08:11 +1100, Joshua Partogi wrote:
> > It is set to localhost I didn't change it and it is the same as
> > configured
> > in 0.6.8. Why doesn't it work out of the box?
> >
> > Thanks heaps.
>
> Try "netstat -nl | grep 9160". Is the
Dne 24.9.2011 0:05, Jonathan Ellis napsal(a):
Really large messages are not encouraged because they will fragment
your heap quickly. Other than that, no.
what is recommended chunk size for storing multi gigabyte files in
cassandra? 64MB is okay or its too large?
Would really appreciate any help on this.
On Thu, Sep 22, 2011 at 11:34 PM, Tharindu Mathew wrote:
> Hi,
>
> I managed to modify the Hadoop-Cassandra integration to start with a column
> of a CF used for indexing. In the map phase, I get keys from different CFs
> and get the row I need. So this a
Hey,
Do a: grep -i mx4 system.log | less
and look for: Mx4jTool.java (line 67) mx4j successfuly loaded
Also make sure you have the latest mx4j-tool from:
http://sourceforge.net/projects/mx4j/files/MX4J%20Binary/3.0.2/
Kind regards,
Sorin
On Fri, Sep 23, 2011 at 11:55 PM, Iwona Bialynick
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