21th I have mirgated to cassandra 1.1.2 but see no improvement
cat /var/log/cassandra/Earth1.log | grep "GC for"
INFO [ScheduledTasks:1] 2012-05-22 17:42:48,445 GCInspector.java (line 123) GC
for ParNew: 345 ms for 1 collections, 82451888 used; max is 8464105472
INFO [ScheduledTasks:1] 2012-05-
Does anyone knows how to totally remove a dead node that only appears
when doing a "describe cluster" from the cli ?
I still got this issue in my production cluster.
Alain
2012/7/20 Alain RODRIGUEZ :
> Hi Aaron,
>
> I have repaired and cleanup both nodes already and I did it after any
> change o
Cannot reproduce ...Written in CL Quorum, RF = 3, cluster of 5 nodes ... I
suppose it's an issue with the client since it's not the first "strange
behaviour" with CounterColumns ...
Messaggio originale
Da: aa...@thelastpickle.com
Data: 20/07/2012 11.12
A:
Ogg: Re: Counters value
You should probably try to break the one row scheme to
2*Number_of_nodes rows scheme.. This should ensure proper distribution
of rows and still allow u to query from a few fixed number of rows.
How u do it depends on how are u gonna choose ur 200-500 columns
during reading (try having them in the s
I have a testing cluster cassandra 1.1.2 with default memory and cache
settings, 1 CF, 1 KS, RF = 2
This is an empty cluster
10.111.1.141datacenter1 rack1 Up Normal 43.04 KB100.00%
0
10.111.1.142datacenter1 rack1
Howmuch memory do you have on the machine. Seems like you have 8G
reserved for the Cassandra java process, If this is all the memory on
the machine you might be swapping. Also which jvm do you use?
kind regards
Joost
On Mon, Jul 23, 2012 at 10:07 AM, Nikolay Kоvshov wrote:
> 21th I have mirgat
in addition, if you don't know how many rows will be needed - in each row,
you can store the key of the next one.
Just like in a linked list.
OR
have 1 row that will hold all the keys that combining your other rows.
1st select the main row (with the keys), then select the other rows.
On Mon, J
Hi,
We are migrating from a 0.8.8 ring to a 1.1.2 ring and we are noticing
missing data post-migration. We use pre-built/configured AMIs so our
preferred route is to leave our existing production 0.8.8 untouched and
bring up a parallel 1.1.2 ring and migrate data into it. Data is written to
the ri
On Mon, Jul 23, 2012 at 10:07 AM, Ertio Lew wrote:
> My major concern is that is it too bad retrieving 300-500 rows (each for a
> single column) in a single read query that I should store all these(around
> a hundred million) columns in a single row?
You could create multiple rows and each row
Actually these columns are 1 for each entity in my application & I need to
query at any time columns for a list of 300-500 entities in one go.
On Mon, Jul 23, 2012 at 10:53 AM, Ertio Lew wrote:
> Actually these columns are 1 for each entity in my application & I need to
> query at any time columns for a list of 300-500 entities in one go.
Can you describe your situation with small example?
For each user in my application, I want to store a *value* that is queried
by using the userId. So there is going to be one column for each user
(userId as col Name & *value* as col Value). Now I want to store these
columns such that can efficiently read columns for atleast 300-500 users
in a sin
On Mon, Jul 23, 2012 at 11:00 AM, Ertio Lew wrote:
> For each user in my application, I want to store a *value* that is queried
> by using the userId. So there is going to be one column for each user
> (userId as col Name & *value* as col Value). Now I want to store these
> columns such that can
I want to read columns for a randomly selected list of userIds(completely
random). I fetch the data using userIds(which would be used as column names
in case of single row or as rowkeys incase of 1 row for each user) for a
selected list of users. Assume that the application knows the list of
userId
On Mon, Jul 23, 2012 at 11:16 AM, Ertio Lew wrote:
> I want to read columns for a randomly selected list of userIds(completely
> random). I fetch the data using userIds(which would be used as column names
> in case of single row or as rowkeys incase of 1 row for each user) for a
> selected list o
Hi,
I am confused as to what is the way to specify column slices for composite
type CFs using CQL3.
I first thought that the way to do so was to use the very ugly and
unintuitive syntax of constructing the PK prefix with equalities, except
the last part of the composite type. But, now, after see
On Tue, Jul 24, 2012 at 03:13:40AM +0530, Ertio Lew wrote:
> Hi all,
>
> I wanted to know if it is somehow possible to design queries which could
> fetch all columns from a row whose acronyms(first letter from each word)
> would match a particular string ?
Do you know the "particular" strings ahe
Hi,
In my cluster, one of the nodes went down (due to a hardware failure). We
managed to get it fixed in couple of days. But it seems its harder to bring
this same node back into cluster without creating read misses. Here is what
I did.
Method 1: I copied the data from all the nodes in that data
On Mon, Jul 23, 2012 at 6:26 PM, Eran Chinthaka Withana
wrote:
> Method 1: I copied the data from all the nodes in that data center, into the
> repaired node, and brought it back up. But because of the rate of updates
> happening, the read misses started going up.
That's not really a good method
Thanks Brandon for the answer (and I didn't know driftx = Brandon Williams.
Thanks for your awesome support in Cassandra IRC)
Increasing CL is tricky for us for now, as our RF on that datacenter is 2
and CL is set to ONE. If we make the CL to be LOCAL_QUORUM, then, if a node
goes down we will have
Can you provide output from sar command for the time period when long
GC occurred ?
Regards,
Wojciech Meler
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