Thanks Bryan for the inputs. One of the tests that I'm trying to do is fire
write requests in one DC and simultaneously do read requests from other DC
using cassandra-stress (custom schema option). While reading from the other DC,
I'm expecting cassandra-stress to throw some error for no data
Hi,
Are there any links/resources which describe performance measurement (latency &
throughput) for a Cassandra Multi DC Active-Active setup across a WAN network
(20Gbps bandwidth) with 5 nodes in each DC.
Basically, I would like to know how to measure latency of writes when data is
Please find below the graph plotted out of cassandra-stress test output log.
While the columnar data took 36 mins to insert 20m records, the JSON format
data was loaded in under 10 mins. The tests were carried on bare-metal 4 node
cluster with 16-core CPU and 120GB memory (8GB Heap) backed by
Hi,
Could you please suggest if Narrow partition is a good choice for the below
use case.
1) Write heavy event log table with 50m inserts per day with a peak load
of 20K transaction per sec. There aren't any updates/deletes to records
inserted. Records are inserted with a TTL of 60
Hi Doan,
Is the timeBased() method available in Java driver similar to now() function in
cqlsh. Does both provide identical results.
Also, the preference is to generate values during record insertion from
database side, rather than client side. Something similar to SYSTIMESTAMP in
Oracle.
Hi,
Oracle Timestamp data type supports fractional seconds (upto 9 digits, 6 is
default). What is the Cassandra equivalent data type for Oracle TimeStamp
nanosecond precision.
This is required for determining the order of insertion of record where the
number of records inserted per sec is
