Hi list,
has anyone ever tried to migrate a cluster from Random to Murmur?
We would like to do so, to have a more standardized setup. I wrote a small
(yet untested) utility, which should be able to read SSTable files from
disk and write them into a cassandra cluster using Hector. This migration
Interesting you even dare to do a live migration :-)
Do you do all Murmur-writes with the timestamp from the Random-data? So
that all migrated data is written with timestamps from the past.
On Mon, Dec 23, 2013 at 3:59 PM, Rahul Menon ra...@apigee.com wrote:
Christian,
I have been planning
mmm, my bad there.
First schema changes are always flushed to disk, so the commit log is not
really an issue.
Second when the commit log replays it just processes the mutations, the Drop
keyspace” message comes from MigrationManager.announceKeyspaceDrop() and is not
called.
If you can
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
Cassandra version is : apache-cassandra-1.2.4
The latest 1.2 version is 1.2.13, you really should be on that.
commitlog_total_space_in_mb: 16
commitlog_segment_size_in_mb: 16
Reducing the total commit log size to 16 MB is a very bad idea, you should
return it to 4096 and the segment size to
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
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.com
On
Is there something wrong with it? Here 1234555665_53323232 and
2344555665_53323232 are super columns. Also, If I have to represent this data
with new composite comparator, How will I accomplish that?
Composite types via pycassa
But in some cases, from one certain node, I get an WriteTimeoutException for
a few minutes until an UnavailableException. It's like the coordinator don't
know the status of the cluster. Any clue why is this happening?
Depending on how the node goes down there can be a delay in other nodes
Hey Aaron,
Thanks for following up on this one.
I guess you're right and in any case, you're unlikely to want two
different versions of the code running at the same time.
Cheers,
Ben
On Mon, Dec 23, 2013 at 5:42 PM, Aaron Morton aa...@thelastpickle.com wrote:
It depends a little on the
Some background….
http://www.datastax.com/dev/blog/lightweight-transactions-in-cassandra-2-0
You can also get a timeout during the prepare phase, well anytime you are
waiting on other node really. The WriteTimeoutException returned from the
server includes a writeType
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
On
Hi,
I have a 6 node, 2DC cluster setup. I have configured consistency level to
QUORUM. But very often i am getting Broken pipe
com.impetus.client.cassandra.CassandraClientBase
(CassandraClientBase.java:1926) - Error while executing native CQL
query Caused by: .
Also to add. It works absolutely fine on single node.
-Vivek
On Tue, Dec 24, 2013 at 12:15 PM, Vivek Mishra mishra.v...@gmail.comwrote:
Hi,
I have a 6 node, 2DC cluster setup. I have configured consistency level to
QUORUM. But very often i am getting Broken pipe
Hi Vivek,
Which release are you using? We had an issue with 2.0.2 that was solved by
a fix in 2.0.3.
On Mon, Dec 23, 2013 at 10:47 PM, Vivek Mishra mishra.v...@gmail.comwrote:
Also to add. It works absolutely fine on single node.
-Vivek
On Tue, Dec 24, 2013 at 12:15 PM, Vivek Mishra
Hi Steven,
Thanks for your reply. We are using version 1.2.9.
-Vivek
On Tue, Dec 24, 2013 at 12:27 PM, Steven A Robenalt
srobe...@stanford.eduwrote:
Hi Vivek,
Which release are you using? We had an issue with 2.0.2 that was solved by
a fix in 2.0.3.
On Mon, Dec 23, 2013 at 10:47 PM,
Hi Steven,
One question, which is confusing , it's a server side issue or client side?
-Vivek
On Tue, Dec 24, 2013 at 12:30 PM, Vivek Mishra mishra.v...@gmail.comwrote:
Hi Steven,
Thanks for your reply. We are using version 1.2.9.
-Vivek
On Tue, Dec 24, 2013 at 12:27 PM, Steven A
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