Hi all,
If I want to add a new Keyspace, does it mean I have to distribute my
storage-conf.xml to whole nodes? and restart whole nodes?
Shen
If I want to add a new Keyspace, does it mean I have to distribute my
storage-conf.xml to whole nodes? and restart whole nodes?
I *think* that is the case in Cassandra 0.6, but I'll let someone else
comment. In trunk/upcoming 7 there are live schema upgrades that
propagate through the
Here are my notes on how to make schema changes in 0.6:
# Empty the commitlog with nodetool drain.
= NOTE while this is running, the node will not accept writes.
# Shutdown Cassandra and verify that there is no remaining data in the
commitlog.
= HOW to verify?
# Delete the sstable files
Hello,
I'm running Cassandra 0.6.0 on a cluster and have an application that
needs to read all rows from a column family using the Cassandra Thrift
API. Ideally, I'd like to be able to do this by having all nodes in the
cluster read in parallel (i.e., each node reads a disjoint set of rows
Hi all,
Please consider this case: (RF=1, CL=ONE)
1. I have A, B and C nodes.
2. A node is a coordinator node, it sends a request to B node to do write
operation.
3. B node is down during write operation, so return failure message to
client, and write a hint to C node.
4. B node comes
As per my knowledge in phpCassa I didnt find any option to remove a
column from the supercolumn, The remove method removes the whole super
column from the key, will check with thrift api.
Through mutation object insert/update happens but removing a column
dosent happen.
Thank you all.
Regards
Hi, we are trying to set up intergation testing for Cassanrda, so we need to
run and stop it as embeded service. Don't have any problem to start
cassandra:
import
org.apache.cassandra.contrib.utils.service.CassandraServiceDataCleaner;
class SomeTestClass {
@Before
public void setup()
Hi,
I found the http://www.slideshare.net/adorepump/cassandra-nosql ppt, that
mentioned State disseminated in* O(logN)* rounds where N is the number of
nodes in the cluster. about gossip on page 11. Is it wrong to draw on page
15? does it need round 4?
Thanks.
Shen
So, am I correctly?
Shen
On Thu, Jul 8, 2010 at 5:33 PM, Anty anty@gmail.com wrote:
Sorry I am wrong .Miss the CF=one.
On Thu, Jul 8, 2010 at 5:27 PM, Anty anty@gmail.com wrote:
On Thu, Jul 8, 2010 at 4:11 PM, ChingShen chingshenc...@gmail.comwrote:
Hi all,
Please consider
Hi,
Thank you for your help.
I don't know if data is writing too fast to the cluster, but I don't think so
(nodes are heavy, big CPU, 12GB RAM...) and there is no so much data (2000
inserts/sec for about 300 KB/sec of raw data).
I trashed all data yesterday 6pm (GMT+2) and launched all
On Thu, Jul 8, 2010 at 4:11 PM, ChingShen chingshenc...@gmail.com wrote:
Hi all,
Please consider this case: (RF=1, CL=ONE)
1. I have A, B and C nodes.
2. A node is a coordinator node, it sends a request to B node to do write
operation.
3. B node is down during write operation, so
If so, when does hinted handoff work?
On Thu, Jul 8, 2010 at 9:55 PM, Anty anty@gmail.com wrote:
On Thu, Jul 8, 2010 at 4:11 PM, ChingShen chingshenc...@gmail.com wrote:
Hi all,
Please consider this case: (RF=1, CL=ONE)
1. I have A, B and C nodes.
2. A node is a coordinator
CFRR does this. Is this possible?
I guess I don't understand the question. :)
On Thu, Jul 8, 2010 at 2:21 AM, Brent N. Chun b...@nutanix.com wrote:
Hello,
I'm running Cassandra 0.6.0 on a cluster and have an application that needs
to read all rows from a column family using the Cassandra
Thanks Jonathan Ellis,
I want to make sure that after A return failure message to client at
CL.ONE, *does A write a hint to C?* If so, although the write operation is
failed, but the data is still stored in C? if B comes back up, then C
forwards to B?
Shen
On Thu, Jul 8, 2010 at 10:08 PM,
On Thu, Jul 8, 2010 at 9:02 AM, ChingShen chingshenc...@gmail.com wrote:
Hmm.. as you mentioned that it will write a hint and report success at
CL.ANY, does the hinted handoff only work at CL.ANY?
Still no. Hints are written when nodes are down, regardless of CL,
unless HH is disabled. CL
(and I'm sure someone will correct me if I am wrong on that)
On Thu, Jul 8, 2010 at 11:24 AM, Benjamin Black b...@b3k.us wrote:
There is a memtable per CF, regardless of how many keyspaces you have.
On Thu, Jul 8, 2010 at 1:19 PM, Benjamin Black b...@b3k.us wrote:
On Thu, Jul 8, 2010 at 9:02 AM, ChingShen chingshenc...@gmail.com wrote:
Hmm.. as you mentioned that it will write a hint and report success at
CL.ANY, does the hinted handoff only work at CL.ANY?
Still no. Hints are written
Thanks - I found on Wiki that the memtables and sstables are on a per CF
basis.
Sorry about the mail client formatting - I have no choice - corporate
controlled:)
Now I am concerned about the deletions - what areas should I investigate
to understand the concerns you raise?
Thanks again
as rcoli just reminded me, i should be more clear that it is 1
_active_ memtable per CF, but there may be several pending flush.
space from deletions is only reclaimed after GCGraceSeconds has
elapsed AND a major compaction is run. default for the former is 10
days. the latter is not automatic.
Hi Jonathan,
The code snippet below was from the repository. I mentioned 0.6.0
specifically just to confirm that reading a CF using token-based range
queries with the RandomPartitioner should (or shouldn't) also work in
that version. I've seen discussions about whether range queries are now
Just found this site and thought it might be interesting to folks on this
list.
http://scale.metaoptimize.com/
It's a stack-overflow style qna site, in their words:
A community interested in scalability, high availability, data stores,
NoSQL, distributed computing, parallel computing, cloud
Does anybody know of any recently developed UI based tools for Cassandra?
Ideally a tool capable of seeing nodes across a cluster would be preferred.
The information contained in this communication may be CONFIDENTIAL and is
intended only for the use of the recipient(s) named above. If you are
There have been a number of bug fixes to this since 0.6.0 -- as Thomas
said, it works in 0.6.3. (Although there is one related bug scheduled
to be fixed in 0.6.4,
https://issues.apache.org/jira/browse/CASSANDRA-1042)
On Thu, Jul 8, 2010 at 2:06 PM, Brent N. Chun b...@nutanix.com wrote:
Hi
Suguru Namura's Web Console may have some of what you need:
http://github.com/suguru/cassandra-webconsole
http://github.com/suguru/cassandra-webconsoleEben
On Thu, Jul 8, 2010 at 1:00 PM, Torla, William william.to...@navteq.comwrote:
Does anybody know of any recently developed UI based tools
Jonathan Ellis wrote:
There have been a number of bug fixes to this since 0.6.0 -- as Thomas
said, it works in 0.6.3. (Although there is one related bug scheduled
to be fixed in 0.6.4,
https://issues.apache.org/jira/browse/CASSANDRA-1042)
Ah, this is exactly one of the cases I've been seeing!
Thomas Heller wrote:
Hey,
Is
this possible in 0.6.0? (Note: for the next startToken, I was just planning
on computing the MD5 digest of the last key directly since I'm accessing
Cassandra through Thrift.)
Can't speak for 0.6.0 but it works for 0.6.3.
Just implemented this in ruby
Should I ever expect multiples of the same key (with non-empty column
sets) from the same get_range_slices call?
I've verified that the column data is identical byte-for-byte, as
well, including column timestamps?
Hi,
Why is cassandra named cassandra?
Thanks.
Shen
On Fri, Jul 9, 2010 at 4:32 AM, Jonathan Ellis jbel...@gmail.com wrote:
If the coordinator knows it can't achieve the requested CL it won't do
any writes, hinted or otherwise, and will immediately report
UnavailableException to the client.
To summarize: hinted writes are only generated when
I think the answer to your question is no, you shouldn't.
I'm feeling far too lazy to do even light research on the topic, but I
remember there being a bug where replicas weren't consolidated and you'd get
a result set that included data from each replica that was consulted for a
query. That
On Thu, Jul 8, 2010 at 10:45 PM, ChingShen chingshenc...@gmail.com wrote:
Ok, If so, I suppose that A sends requests to B, C and D nodes(RF=3) at
CL.QUORUM, but D is down, then return success message to the client, and A
write a hint to E node? until D comes back up then E forwards the data to
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