Tyler,
Thanks for the explanation. The objective is not to have a perfectly
balanced US-East and SG DC clusters. SG DC cluster is just a backup cluster
and hence has lesser nodes than US-East cluster. What we are trying to
figure out is the imbalance between the 6 nodes within US-East itself. I'll
On Fri, Nov 1, 2013 at 5:07 AM, Rakesh Rajan wrote:
>
> 1) By alternating racks, do you mean to alternate racks between all nodes
> in a single DC v/s multiple DCs? AWS EastCoast has 4 AZs
> and Singapore has 2 AZs. So is the final solution something like this:
> ip11 - East Coast - m1.xlarge / u
Forgot to mention: All 9 nodes on Cassandra 1.2.9. Also, tpstats on the
high CPU node indicate:
1. Pool NameActive Pending Completed
Blocked All time blocked
2. ReadStage32 6600 3420385815
0 0
3. RequestRe
@Tyler / @Rob,
As Ashish mentioned earlier, we have 9 nodes on AWS - 6 on EastCoast and 3
on Singapore. All 9 nodes uses EC2Snitch. The current ring ( across all
nodes in 2 DC ) looks like this:
ip11 - East Coast - m1.xlarge / us-east-1b - Size: 83 GB - Token: 0
ip21 - Singapore - m1.xla
Hi Evan,
The clients connect to all nodes. We tried shutting the thrift server on
the affected node. Loads did not come down.
On Fri, Nov 1, 2013 at 12:59 AM, Evan Weaver wrote:
> Are all your clients only connecting to your first node? I would
> probably strace it and compare the trace to on
On Thu, Oct 31, 2013 at 1:42 PM, Tyler Hobbs wrote:
> I think the "Owns" calculation isn't taking racks into consideration. The
> fact that you aren't alternating racks (availability zones, with EC2Snitch)
> is what is causing the imbalance. I suggest either using the same rack for
> all nodes
I think the "Owns" calculation isn't taking racks into consideration. The
fact that you aren't alternating racks (availability zones, with EC2Snitch)
is what is causing the imbalance. I suggest either using the same rack for
all nodes (preferred) or alternate your racks/AZs: 1b, 1c, 1d, 1b, 1c, 1
We have a 9 node cluster. 6 nodes are in one data-center and 3 nodes in the
other. All machines are Amazon M1.XLarge configuration.
Datacenter: DC1
==
Address RackStatus State Load
OwnsToken
ip11 1b Up Normal 76.46 GB16.67%
0
ip12
