How do people normally setup multiple data center replication in terms of
number of *local* replicas?
So say you have two data centers, do you have 2 local replicas, for a total
of 4 replicas? Or do you have 2 in one datacenter, and 1 in another?
If you only have one in a local datacenter then
Ah.. six replicas. At least its super inexpensive that way (sarcasm!)
On Sun, Jan 18, 2015 at 8:14 PM, Jonathan Haddad j...@jonhaddad.com wrote:
Sorry, I left out RF. Yes, I prefer 3 replicas in each datacenter, and
that's pretty common.
On Sun Jan 18 2015 at 8:02:12 PM Kevin Burton
log does not show anything fishy, because it is just for fun cluster, we
can actually wipe our 3 nodes cluster casandra dir,
data,saved_caches,commitlog and start it all over, we encounter the same
problem.
two nodes running cassandra 2.1.2 and one running cassandra 2.1.1
I look a look at the
Hi,
just as a short follow up, it worked - all nodes now have 20-30 sstables
instead of thousands.
Cheers,
Roland
It's set on all the tables, as I'm using the default for all the tables.
But for that particular table there are 41 SSTables between 60MB and 85MB,
it should only take 4 for the compaction to kick in.
As this is probably a bug and going back in the mailing list archive, it
seems it's already been
3 what? :-P replicas per datacenter or 3 data centers?
So if you have 2 data centers you would have 6 total replicas with 3 local
replicas per datacenter?
On Sun, Jan 18, 2015 at 7:53 PM, Jonathan Haddad j...@jonhaddad.com wrote:
Personally I wouldn't go 3 unless you have a good reason.
Hi,
Immediately after a repair, I execute cqlsh, still the schema mismatch?
[2015-01-19 13:50:49,979] Repair session
19c67350-9f9f-11e4-8b56-a322c40b8b81 for range
(-725731847063341791,-718486959589605925] finished
[2015-01-19 13:50:49,980] Repair session
1a612cb0-9f9f-11e4-8b56-a322c40b8b81 for
Hi Flavien,
I hit some problem with minor compations recently (just some days ago) -
but with many more tables. In my case compactions got not triggered, you
can check this with nodetool compactionstats.
Reason for me was that those minor compactions did not get triggered
since there were
Sorry, I left out RF. Yes, I prefer 3 replicas in each datacenter, and
that's pretty common.
On Sun Jan 18 2015 at 8:02:12 PM Kevin Burton bur...@spinn3r.com wrote:
3 what? :-P replicas per datacenter or 3 data centers?
So if you have 2 data centers you would have 6 total replicas with 3
Personally I wouldn't go 3 unless you have a good reason.
On Sun Jan 18 2015 at 7:52:10 PM Kevin Burton bur...@spinn3r.com wrote:
How do people normally setup multiple data center replication in terms of
number of *local* replicas?
So say you have two data centers, do you have 2 local
I like to have 3 replicas across 3 racks in each datacenter as a rue of thumb.
You can vary that, but it depends upon the use case, and the SLA's for latency.
This can get a little complicated if you're using the cloud and automated
deployment strategies as I like to use the same abstractions
Check out this doc, I think it may help you:
http://www.datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_backup_restore_c.html
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Seems like Size Tier Compaction is based on table, which table did you set
the compaction strategy?
A minor compaction does not involve all the tables in a keyspace.
Ref:
http://datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_configure_compaction_t.html
OK.. so if I’m running with 2 replicas, then BOTH of them need to be online
for this to work. Correct? Because with two replicas I need 2 to form a
quorum.
This is somewhat confusing them. Because if you have two replicas, and
you’re depending on these types of transactions, then this is a
I’m really confused here.
I”m calling:
acquireInsert.setConsistencyLevel( ConsistencyLevel.ONE );
but I”m still getting the exception:
com.datastax.driver.core.exceptions.UnavailableException: Not enough
replica available for query at consistency SERIAL (2 required but only 1
alive)
Check out
http://www.datastax.com/documentation/cassandra/2.0/cassandra/dml/dml_tunable_consistency_c.html
Cassandra 2.0 uses the Paxos consensus protocol, which resembles 2-phase
commit, to support linearizable consistency. All operations are quorum-based
...
This kicks in whenever you do CAS
Hi,
I want to backup the files needed for data restoring/data migration. There
are several directories:
/var/lib/cassandra/
- commitlog/
- data/
- mytable/
- system/
- system_traces/
Hi,
I am using Size Tier Compaction (Cassandra 2.1.2). Minor compaction is not
triggering even though it should. See the SSTables on disk:
http://pastebin.com/PSwZ5mrT
You can see that we have 41 SSTable between 60MB and 85MB, which should
trigger compaction unless I am missing something.
Is
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