Hello Shrikar,
We are still facing read latency issue, here is the histogram
http://pastebin.com/yEvMuHYh
On Sat, Mar 29, 2014 at 8:11 AM, Apoorva Gaurav
apoorva.gau...@myntra.comwrote:
Hello Shrikar,
Yes primary key is (studentID, subjectID). I had dropped the test table,
recreating and
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 shrika...@gmail.com wrote:
Hi Apoorva,
As per the
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
apoorva.gau...@myntra.comwrote:
At the client side we are getting a latency of ~350ms, we are using
datastax driver
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 shrika...@gmail.com wrote:
How about the client side socket limits? Cassandra client side maximum
connection per host and read consistency
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 arodr...@gmail.comwrote:
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
On Thu, Apr 3, 2014 at 8:38 AM, Alain RODRIGUEZ arodr...@gmail.com 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
On Thu, Apr 3, 2014 at 12:20 AM, Apoorva Gaurav
apoorva.gau...@myntra.comwrote:
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
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
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