Hi Apoorva,
As per the cfhistogram there are some rows which have more than 75k columns
and around 150k reads hit 2 SStables.
Are you sure that you are seeing more than 500ms latency? The cfhistogram
should the worst read performance was around 51ms
which looks reasonable with many reads hitting
At the client side we are getting a latency of ~350ms, we are using
datastax driver 2.0.0 and have kept the fetch size as 500. And these are
coming while reading rows having ~200 columns.
On Thu, Apr 3, 2014 at 12:45 PM, Shrikar archak wrote:
> Hi Apoorva,
> As per the cfhistogram there are som
How about the client side socket limits? Cassandra client side maximum
connection per host and read consistency level?
~Shrikar
On Thu, Apr 3, 2014 at 12:20 AM, Apoorva Gaurav
wrote:
> At the client side we are getting a latency of ~350ms, we are using
> datastax driver 2.0.0 and have kept the
client side socket limit : 64K
client side maximum connection per host : 8
read consistency level : Quorum
On Thu, Apr 3, 2014 at 12:59 PM, Shrikar archak wrote:
> How about the client side socket limits? Cassandra client side maximum
> connection per host and read consistency level?
>
> ~Shrik
Hi,
We are using Cassandra 1.2.11 on AWS EC2 services.
I read that we can use different A-Z to be more "crash tolerant".
Basically, using a RF=3 and placing servers into different zones like
node1-zoneA node2-zoneB node3-zoneC node4-zoneA... As replicas are placed
to the next server in the ring w
sstable2json tomcat-t5-ic-1-Data.db -e
gives me
0021
001f
0020
How do I convert this (hex) to actual value of column so I can do below
select * from tomcat.t5 where c1='concerted value';
Thanks in advance for the help.
Hi
As we are using Cassandra 1.2.11 and we will want to move to 2.1 as soon as
it will be released and considered stable enough, we will have to make a
few migrations :
1.2.11 --> 1.2.last (16 currently)
1.2.last --> 2.0.last
2.0.last --> 2.1.last
The point is we ran into a lot of migrations
Hey ng,
You can use CQL and Cassandra do the conversion if you would like. If
your table uses int type keys:
> select * from tomcat.tx where c1 = blobAsInt(0x0021);
The relevant section of the CQL3 docs are here:
http://cassandra.apache.org/doc/cql3/CQL.html#blobFun
You can use blobAs... for
On Thu, Apr 3, 2014 at 8:56 AM, Alain RODRIGUEZ wrote:
> Since we use AWS EC2 instances, Is it possible to upgrade Cassandra
> through a new DC as it is recommended while switching to vnodes ?
>
No, because bootstrapping (and rebuilding/repairing/etc.) on a
split-major-version cluster is not su
On Thu, Apr 3, 2014 at 8:38 AM, Alain RODRIGUEZ wrote:
> I read that we can use different A-Z to be more "crash tolerant".
> Basically, using a RF=3 and placing servers into different zones like
> node1-zoneA node2-zoneB node3-zoneC node4-zoneA... As replicas are placed
> to the next server in th
On Thu, Apr 3, 2014 at 12:20 AM, Apoorva Gaurav
wrote:
> At the client side we are getting a latency of ~350ms, we are using
> datastax driver 2.0.0 and have kept the fetch size as 500. And these are
> coming while reading rows having ~200 columns.
>
And you're sure that the 300ms between what ca
Hi,
maybe someone knows a nice solution to the following problem:
I have N worker processes that are intentionally masterless and do not know
about each other - they are stateless and independent instances of a given
service system.
These workers need to poll an event feed, say about every 10
On Fri, Apr 4, 2014 at 3:32 AM, Robert Coli wrote:
> On Thu, Apr 3, 2014 at 12:20 AM, Apoorva Gaurav > wrote:
>
>> At the client side we are getting a latency of ~350ms, we are using
>> datastax driver 2.0.0 and have kept the fetch size as 500. And these are
>> coming while reading rows having ~
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