Hi,
I am trying to delete a keyspace called Index.
Here is all the versions of the drop I tried.
[default@unknown] drop keyspace 'Index';
Keyspace ''Index'' not found.
[default@unknown] drop keyspace Index;
Syntax error at position 14: mismatched input 'Index' expecting set null
[d
> I'm trying to understand if this is expected or not, and if there is
Without careful tuning, outliers around a couple of hundred ms are
definitely expected in general (not *necessarily*, depending on
workload) as a result of garbage collection pauses. The impact will be
worsened a bit if you are
I should add: If you are indeed actually pausing due to "promotion
failed" or "concurrent mode failure" (which you will see in the GC log
if you enable it with the options I suggested), the first thing I
would try to mitigate is:
* Decrease the occupancy trigger (search for "occupancy") of CMS to
> During the garbage collections, Cassandra freezes for about ten seconds. I
> observe the following log entries:
>
>
>
> “GC for ConcurrentMarkSweep: 11597 ms for 1 collections, 1887933144 used; max
> is 8550678528”
Ok, first off: Are you certain that it is actually pausing, or are you
assumin
Hey Guys,
I just came across http://wiki.apache.org/cassandra/ByteOrderedPartitioner and
it got me thinking. If the row keys are java.util.UUID which are generated
randomly (and securely), then what type of partitioner would be the best? Since
the key values are already random, would it make a
What is the syntax of setStrategy_options in thrift.
The following fails:
Util.java:22:
setStrategy_options(java.util.Map)
in org.apache.cassandra.thrift.KsDef cannot be applied to
(java.lang.String)
newKs.setStrategy_options("{replication_factor:2}");
It is not telling you to multiply your key size by 10-12, it is telling you to
multiply the output of the nodetool cfstats reported "key cache size" by 10-12.
-Jeremiah
On Dec 18, 2011, at 6:37 PM, Guy Incognito wrote:
> to be blunt, this doesn't sound right to me, unless it's doing something
If you don't know the names of the columns you probably want to call
ColumnSlice.getColumns() and iterate through the list of HColumns.
see
http://rantav.github.com/hector//source/content/API/core/1.0-1/me/prettyprint/hector/api/beans/ColumnSlice.html
http://rantav.github.com/hector//source/cont
Has anyone looked much at the maximum latency of cassandra read/write
requests? (rather than the average latency and average throughput)
We've been struggling for quite some time trying to figure out why we
we see occasional read or write response times in the 100s of milliseconds
even on fast m
Which keyspace are you trying to delete ?
What happens when you use drop ; in cassandra-cli ?
If nothing happens is anything logged in the server side logs ?
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 19/12/2011, at 11:48 PM, Mic
I haven't seen that one before. Can you create a ticket?
On Tue, Dec 13, 2011 at 1:07 PM, Maxim Potekhin wrote:
> Running cli --debug:
>
> [default@PANDA] show schema;
> null
> java.lang.RuntimeException
> at
> org.apache.cassandra.cli.CliClient.executeCLIStatement(CliClient.java:310)
>
http://wiki.apache.org/cassandra/Operations#Dealing_with_the_consequences_of_nodetool_repair_not_running_within_GCGraceSeconds
On Mon, Dec 12, 2011 at 7:05 PM, Maxim Potekhin wrote:
> Hello,
>
> I know that this problem used to exist in 0.8.1 --
> I delete rows, run a repair and these rows are ba
Dear Cassandra and Hector experts,
I am using Hector to implement and query information from Composite Columns.
I found this site to be quite useful:
http://randomizedsort.blogspot.com/2011/11/cassandra-range-query-using.html
It goes through the steps of creating a composite column, to perform s
Increasing memory in this case may not solve the problem. Share some
information about your workload. Cluster configuration, cache sizes etc.
You can also try getting java heap historgram to get more info on what's on
the heap.
On Mon, Dec 19, 2011 at 7:35 AM, Rene Kochen
wrote:
> I recently se
Tuning garbage colletion is really hard. Espescially if you do not know why
garbage collection stalls.
In general I must say I have never seen a software which shipped with such a
good garbage collection configuration as Cassandra.
The thing that looks suspiscious is that the major collections a
Giving it more memory will simply increase the time between (and duration
of) the freezes. Which JVM are you using? I think that Java 7 has some nice
improvements to GC especially with large heaps.
On Mon, Dec 19, 2011 at 7:35 AM, Rene Kochen
wrote:
> I recently see the following garbage collect
Hi,
We are using PHPCassa to connect to Cassandra 1.0.2. After we installed
the thrift extension we started noticing the following in the error logs.
[We didn't notice this when we were running raw thrift library with out
extension].
ERROR [pool-2-thread-5314] 2011-12-05 20:26:47,729
CustomTThrea
Hi,
I had Cassandra version 0.7.6 and a schema called Index.
When I upgraded to 1.0.3 I realized that I cant create this keyspace maybe
because Index has become a reserved word?
I tried 'Index' and "Index" and still get an error so I created a new
keyspace instead.
Now I am not able to delet
Hi,
We're trying to understand how leveled compaction works.
The documentation written is about new/updated columns only.
What about expiring columns and TTL? When higher level sstables will be
compacted and expired columns removed?
Best regards/ Pagarbiai
Viktor Jevdokimov
Senior D
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