I am using Cassandra 1.1.11 and plan on upgrading soon, but in the
meantime here is what happened.
I couldn't run repairs because of a slow WAN pipe, so i removed the
second data center from the cluster.
Today I need to bring that data center back in. It is not 2-3 days out
dated. I have
We are running a 6-node cluster in amazon cloud (2 nodes in each
availability zone). The ec2 instances are m1.large and we have 256 vnodes
on each node.
We are using Ec2Snitch, NetworkTopologyStrategy and a replication factor of
3.
When we decommission one node suddenly reads and writes start to
If you are starting with Cassandra I really advice you to start with 1.2.11
In 1.2+ bloomfilters are off-heap, you can use vnodes...
I summed up the bloom filter usage reported by nodetool cfstats in all the
CFs and it was under 50 MB.
This is quite a small value. Is there no error in your
Does anyone have a good explanation or pointers to docs for understanding
how Cassandra decides to remove SSTables from disk?
After performing a large set of deletes on our cluster, a few hundred
gigabytes work (essentially cleaning out nearly all old data), we noticed
that nodetool reported
On Fri, Oct 25, 2013 at 1:10 PM, Jasdeep Hundal dsjas...@gmail.com wrote:
After performing a large set of deletes on our cluster, a few hundred
gigabytes work (essentially cleaning out nearly all old data), we noticed
that nodetool reported about the same load as before.
Tombstones are
Thanks Rob.
Will checkout the tool you linked to. In our case it's definitely not the
tombstones hanging around since we write entire rows at once and the amount
of data in a row is far, far greater than the space a tombstone takes.
Jasdeep
On Fri, Oct 25, 2013 at 1:14 PM, Robert Coli
I don't know whether this is possible but was just curious, can you query
for the data in the remote datacenter with a CL.ONE ?
There could be a case where one might not have a QUORUM and would like to
read the most recent data which includes the data from the other
datacenter. AFAIK to reliably
On Fri, Oct 25, 2013 at 2:47 PM, srmore comom...@gmail.com wrote:
I don't know whether this is possible but was just curious, can you query
for the data in the remote datacenter with a CL.ONE ?
A coordinator at CL.ONE picks which replica(s) to query based in large part
on the dynamic snitch.
We are thinking through the deployment architecture for our Cassandra cluster.
Let us say that we choose to deploy data across three racks.
If let us say that one rack power went down for 10 mins and then it came back.
As soon as it came back up, due to some human error, rack1 goes down. Now
We have seen read repair take very long time even for few GBs of data even
though we don't see disk or network bottlenecks. Do you use any specific
configuration to speed up read repairs?
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