its DSE 3.1 Cassandra 2.1
On Thu, Aug 22, 2013 at 10:28 AM, Robert Coli wrote:
> On Thu, Aug 22, 2013 at 10:24 AM, Jay Svc wrote:
>
>> In our cluster, the commit log is getting filled up as write progresses.
>> It is noticed that once the commit log is flushed to SSTa
Hi Users,
In our cluster, the commit log is getting filled up as write progresses. It
is noticed that once the commit log is flushed to SSTable the commit log
files are not removed/deleted. The result of that the commit log volume is
getting filled with commit log files.
Any reason why commit log
that works and then make one change at a time until it does not.
> You should then be able to say "The system can handle X writes of Y size
> per second, but after that compaction cannot keep up."
>
> Cheers
>
> -
> Aaron Morton
> Freelance Cassandra
ction
> in a test machine, solved by changing from openjdk 1.6 to sun-jdk 1.6.
>
>
>
>
> On Thu, Apr 18, 2013 at 2:08 PM, Jay Svc wrote:
>
>> By the way the compaction and commit log disk latency, these are two
>> seperate problems I see.
>>
>> The impo
the throughput
> until compaction cannot keep up. Then increase the throughout and see how
> that works. Then increase throughput again and see what happens.
>
> Cheers
>
>
> -
> Aaron Morton
> Freelance Cassandra Consultant
> New Zealand
>
> @aaro
oblems with compaction
> in a test machine, solved by changing from openjdk 1.6 to sun-jdk 1.6.
>
>
>
>
> On Thu, Apr 18, 2013 at 2:08 PM, Jay Svc wrote:
>
>> By the way the compaction and commit log disk latency, these are two
>> seperate problems I see.
>>
By the way the compaction and commit log disk latency, these are two
seperate problems I see.
The important one is compaction problem, How I can speed that up?
Thanks,
Jay
On Thu, Apr 18, 2013 at 12:07 PM, Jay Svc wrote:
> Looks like formatting is bit messed up. Please let me know if
Looks like formatting is bit messed up. Please let me know if you want the
same in clean format.
Thanks,
Jay
On Thu, Apr 18, 2013 at 12:05 PM, Jay Svc wrote:
> Hi Aaron, Alexis,
>
> Thanks for reply, Please find some more details below.
>
> *Core problems:* Compaction is taking
rectories and not in the
> commitlog.
> >
> > http://wiki.apache.org/cassandra/MemtableSSTable
> >
> >
> >
> >
> > On Wed, Apr 17, 2013 at 7:58 PM, Jay Svc wrote:
> > Hi Alexis,
> >
> > Thank you for your response.
> >
> &g
;
>>>
>>> On Wed, Apr 17, 2013 at 5:26 PM, Edward Capriolo
>>> wrote:
>>>
>>>> three things:
>>>> 1) compaction throughput is fairly low (yaml nodetool)
>>>> 2) concurrent compactions is fairly low (yaml)
>>>> 3) mu
your version
>>
>> Try raising these things. Otherwise consider option 4.
>>
>> 4)$$$ RAID,RAM>
>>
>> On Wed, Apr 17, 2013 at 4:01 PM, Jay Svc wrote:
>>
>>> Hi Team,
>>>
>>>
>>>
>>> I have a
RAID,RAM
>
> On Wed, Apr 17, 2013 at 4:01 PM, Jay Svc wrote:
>
>> Hi Team,
>>
>>
>>
>> I have a high write traffic to my Cassandra cluster. I experience a very
>> high number of pending compactions. As I expect higher writes, The pending
>&g
Hi Team,
I have a high write traffic to my Cassandra cluster. I experience a very
high number of pending compactions. As I expect higher writes, The pending
compactions keep increasing. Even when I stop my writes it takes several
hours to finishing pending compactions.
My CF is configured with
...@adform.com> wrote:
>
>> Memtables resides in heap, write rate impacts GC, more writes - more
>> frequent and longer ParNew GC pauses.
>>
>>
>> From: Jay Svc [mailto:jaytechg...@gmail.com]
>> Sent: Friday, April 12, 2013 01:03
>> To: user@cassandr
On Thu, Apr 11, 2013 at 10:35 PM, Viktor Jevdokimov <
viktor.jevdoki...@adform.com> wrote:
> Memtables resides in heap, write rate impacts GC, more writes - more
> frequent and longer ParNew GC pauses.
>
>
> From: Jay Svc [mailto:jaytechg...@gmail.com]
> Sent: Friday, A
Hi Team,
I have got this 8GB of RAM out of that 4GB allocated to Java Heap. My
question is the size of Memtable does it contribute to heap size? or they
are part of off-heap?
Does bigger Memtable would have impact on GC and overall memory management?
I am using DSE 3.0 / Cassandra 1.1.9.
Thanks
u
> system is running.
>
> Slowing down compaction will reduce it's impact.
>
> Cheers
>
> -
> Aaron Morton
> Freelance Cassandra Consultant
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 30/03/2013, at 12:58 AM,
heers
>
> -
> Aaron Morton
> Freelance Cassandra Consultant
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 27/03/2013, at 1:43 PM, Jay Svc wrote:
>
> Thanks Dean again!
>
> My use case is high number of reads and writ
etc. and see how backlogged you are in
> pending tasks….how many pending?
>
> Later,
> Dean
>
> From: Jay Svc mailto:jaytechg...@gmail.com>>
> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <
> user@cassandra.apache.or
r handle the load.
>
> Later,
> Dean
>
> From: Jay Svc mailto:jaytechg...@gmail.com>>
> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <
> user@cassandra.apache.org<mailto:user@cassandra.apache.org>>
> Date: Tuesda
Hi Team,
I have this 3 node cluster. I am writing data to these node at the rate of
2,000 records/second. What I observed that if I do inserts. (Means records
for those keys does not exist, my column family has 0 records to start
with) then I have better write performacne, low SSTable count, low p
Hi All,
On each row I have a column which maintains the timestamp like
"lastUpdated" etc.
While inserting such row I want to make sure that the row should be only
updated if the lastUpdated is older than the new one I am inserting.
One way to do this is -
Read the record first check the timesta
Folks,
For given situation I am expecting multiple read and write request to a
same cluster. What are primary design or configuration consideration we
should make?
Any thoughts or links to such documentation is appreciated.
Thanks,
Jay
Folks,
I would like to write(insert or update) to a single row in a column family.
I have concurrent requests which will write to a single row. Do we see any
performance implications because of concurrent writes to a single row where
comparator has to sort the columns at the same time?
Please s
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