> Sorry for the rather primitive question, but it's not clear to me if I need
> to fetch the whole row, add a column as a dictionary entry and re-insert it
> if I want to expand the row by one column. Help will be appreciated.
As was pointed you, reading and re-inserting is definitely not the way
moving to user list.
describe_ring() will give you a list of the token ranges and the nodes that are
responsible for them http://wiki.apache.org/cassandra/API . It does not include
information on which nodes are up or down or bootstrapping.
Information about the state of the nodes is availabl
Dear community!
Please share you settings for swap on linux box
According to Cassandra Wiki, best strategy is no swap at all.
http://wiki.apache.org/cassandra/MemtableThresholds#Virtual_Memory_and_Swap
2011/3/16 ruslan usifov :
> Dear community!
>
> Please share you settings for swap on linux box
>
--
w3m
How can a cassandra node be taken back into the ring after being decommissioned
(with nodetool decommission for example)?
Yes, I am aware that no data is removed and you have to clean the data
directory if you want the node to pick up a different token range.
I just want to know how to put back
We are running 0.6.6 and are considering upgrading to either 0.6.8 or
one of the 0.7.x releases. What is the recommended version and
procedure? What are the issues we face? Are there any specific
storage gotchas we need to be aware of? Are there any docs around
this process for review?
Thanks,
There are both Python and Java stress testing tools. I found the Java
version easier to use. These directions (which echo the README for
stress.java) may help get you going:
http://www.datastax.com/docs/0.7/utilities/stress_java
On Tue, Mar 15, 2011 at 9:25 AM, Jeremy Hanna wrote:
> contrib is
Hi Jake,
I'm sending this privately, because I wanted to tell you my opinion frankly.
I don't know about the .6 series or .74, but so far, all of the .7
series of cassandra has been a disaster. I would think twice about
switching to anything in .7 series to production until things stabilize
and
Was just reading through the code to get an understanding of the memory impact
for secondary indexes. The index CF is created with the same memtable settings
as the parent CF (in CFMetaData.newIndexMetadata).
Does this mean that when estimating JVM heap size each index should be
considered as
That should work then, assuming SimpleStrategy/RackUnawareStrategy.
Otherwise figuring out which machines share which data gets
complicated.
Note that if you have room on the machines, it's going to be faster to
copy the entire data set to each machine and run cleanup, than to have
repair fix 3 of
Sorry guys, that was meant to be private. My opinion stands, but I
didn't want to hurt any of the dev's feelings by being too frank. I
think the progress has been good in new features, but I feel we have
taken a step back in relability and scalability since so many features
were added without ade
Hello
For example if we want change one server to another with ip address change
too. How can we that eases way? For now we do nodetool removetocken, then
set autobootstrap: true on new server (with the token that was on old node)
So did you downgraded it back to 0.6.x series?
On Thu, Mar 17, 2011 at 6:36 AM, Paul Pak wrote:
> Sorry guys, that was meant to be private. My opinion stands, but I
> didn't want to hurt any of the dev's feelings by being too frank. I
> think the progress has been good in new features, but I fe
Dear All,
this is from my new Cassandra server. It obviously uses hyperthreading, I
just don't know how to translate this to concurrent readers and writers in
cassandra.yaml -- can somebody take a look and tell me what number of cores
I need to assume for concurrent_reads and concurrent_writes. Is
Hello Peter, thanks for the note.
I'm not looking for anything fancy. It's just when I'm looking at the
following bit of Pycassa docs, it's not 100% clear to me that it won't
overwrite the entire row for the key, if I want to simply add an extra
column {'foo':'bar'} to the already existing row. I
Paul,
Don't feel like you have to hold back when it comes to feedback. There is a
place to vote on releases. If you have something that could potentially be
critical that you can isolate, by all means chime in. Even if your vote isn't
binding if you are not a committer, votes with something
On Wed, Mar 16, 2011 at 9:58 PM, buddhasystem wrote:
> Dear All,
> this is from my new Cassandra server. It obviously uses hyperthreading, I
> just don't know how to translate this to concurrent readers and writers in
> cassandra.yaml -- can somebody take a look and tell me what number of cores
>
insert() will only overwrite (or insert) the columns that you supply in the
dictionary. So, if you do:
cf.insert('key', {'foo': 'bar'})
and the column 'foo' doesn't exist in that row yet, the column will simply
be added to the other columns in the row.
On Wed, Mar 16, 2011 at 9:00 PM, buddhas
On Thu, Feb 3, 2011 at 1:49 AM, Ryan King wrote:
> On Wed, Feb 2, 2011 at 6:22 AM, Chris Burroughs
> wrote:
> > On 01/28/2011 09:19 PM, Chris Burroughs wrote:
> >> Thanks Oleg and Zhu. I swear that wasn't a new hotspot version when I
> >> checked, but that's obviously not the case. I'll update
Thanks for clarification, Tyler, sorry again for the basic question. I've
been doing straight inserts from Oracle so far but now I need to update rows
with new columns.
--
View this message in context:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Is-column-update-column-atomi
Thanks! Docs say it's good to set it to 8*Ncores, are saying you see 8 cores
in this output? I know I need to go way above default 32 with this setup.
--
View this message in context:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Please-help-decipher-proc-cpuinfo-for-optimal-Ca
On Thu, Mar 17, 2011 at 10:27 AM, Zhu Han wrote:
>
>
> On Thu, Feb 3, 2011 at 1:49 AM, Ryan King wrote:
>
>> On Wed, Feb 2, 2011 at 6:22 AM, Chris Burroughs
>> wrote:
>> > On 01/28/2011 09:19 PM, Chris Burroughs wrote:
>> >> Thanks Oleg and Zhu. I swear that wasn't a new hotspot version when I
Hi,
I've been working on a scala based api for cassandra. I've built it directly
on top of thrift. I'm having a problem getting a slice of a superColumn. When
I get a columnOrSuperColumn back, and call 'cos.super_column.name' and
deserialize the bytes I'm not getting the expected output.
He
Thanks for tracking that down, Roland. I've created
https://issues.apache.org/jira/browse/CASSANDRA-2347 to fix this.
On Wed, Mar 16, 2011 at 10:37 AM, Roland Gude wrote:
> I have applied the suggested changes in my local source tree and did run all
> my testcases (the supplied ones as well as t
Hi All,
Anyone knows about stable C++ client for cassandra?
Thanks
Anurag
Hey all,
I'm running 0.7.0 on a cluster of 5 machines. When I create a new column family
after I run nodetool compact (but before it finishes), I see the error below.
Seems like StorageService.getValidColumnFamilies() should make a copy of the
set of column families in the case where cfNames.le
You could try this,
https://github.com/posulliv/libcassandra
- primal
From: Anurag Gujral
To: user@cassandra.apache.org
Sent: Wed, March 16, 2011 9:36:25 PM
Subject: Cassandra c++ client
Hi All,
Anyone knows about stable C++ client for cassandra?
libcassandra isn't vary active. Since we already has a object pool library,
we went for using raw thrift in C++ instead of using any other library.
Thanks,
Naren
On Wed, Mar 16, 2011 at 10:03 PM, Primal Wijesekera <
primalwijesek...@yahoo.com> wrote:
> You could try this,
>
> https://github.com/
I am getting exception when starting cassandra 0.7.3
ERROR 01:10:48,321 Exception encountered during startup.
java.lang.NegativeArraySizeException
at
org.apache.cassandra.db.ColumnFamilyStore.readSavedCache(ColumnFamilyStore.java:274)
at
org.apache.cassandra.db.ColumnFamilyStore.(ColumnFam
Is this new install or upgrade?
Thanks,
Naren
On Wed, Mar 16, 2011 at 11:15 PM, Anurag Gujral wrote:
> I am getting exception when starting cassandra 0.7.3
>
> ERROR 01:10:48,321 Exception encountered during startup.
> java.lang.NegativeArraySizeException
> at
> org.apache.cassandra.db.Colum
New install.
I created the saved_caches directory and I tried restarting cassandra now I
am getting
INFO 01:20:55,632 DiskAccessMode is standard, indexAccessMode is standard
INFO 01:20:55,789 reading saved cache
/var/lib/cassandra/saved_caches/system-IndexInfo-KeyCache
ERROR 01:20:55,790 Exception
31 matches
Mail list logo
