Hi,
So, there's two things where you'll see the impact of "lots of datacenters"
On the query side, global quorum queries (and queries with cross-dc
probabilistic read repair) may touch more DCs and be slower, and
read-repairs during those queries get more expensive. Your geography
matters a ton
Hi, Multiple DCs are required to maintain lower latencies for requests
across the globe. I agree that it's a lot of redundant copies of data.
On Wed, Jul 14, 2021, 7:00 PM Jim Shaw wrote:
> Shaurya:
> What's the purpose to partise too many data centers ?
> RF=3, is within a center, you have 3
Shaurya:
What's the purpose to partise too many data centers ?
RF=3, is within a center, you have 3 copies of data.
If you have 3 DCs, means 9 copies of data.
Think about space wasted, Network bandwidth wasted for number of copies.
BTW, Ours just 2 DCs for regional DR.
Thanks,
Jim
On Wed, Jul
Reading and writing with local_quorum should not be a problem in terms of
performance if all data centers are healthy. But Quorum queries will take
hit due to network latency and that is expected and I believe you are aware
of that.
On Wed, Jul 14, 2021 at 12:38 PM Shaurya Gupta
wrote:
> We are
We are planning to go with 5 DCs with RF of 3 in each. All DCs will have
reads and writes. Most queries are done at LOCAL_QUORUM.
A very few Simple and CAS queries (<0.1%) will be done at QUORUM
consistency.
On Wed, Jul 14, 2021 at 12:19 PM manish khandelwal <
manishkhandelwa...@gmail.com> wrote:
I don't think there is any restriction on the number of data centers. So
technically you can add as many data centers you want.
Performance depends on how you use your cluster. For example, one of your
data centers could be read only, or is there traffic on all the data
centers.
On Wed, Jul 14,
You can really have as many as you need. The most unusual clusters I've
worked on had about 12 DCs mostly because they had different workloads that
needed to be isolated into their own DCs so one workload didn't affect
another. FWIW by "workloads" I mean OLTP, analytics, reporting, etc.
How many
Hi
Does someone have any suggestions on the maximum number of Data Centers
which NetworkTopology strategy can have for a keyspace. Not only
technically but considering performance as well.
In each Data Center RF is 3.
Thanks!
--
Shaurya Gupta
