I will keep an eye for that if it happens again. Times at this point are
synchronized
On Wed, Jan 7, 2015 at 10:37 PM, Duncan Sands duncan.sa...@gmail.com
wrote:
Hi Anand,
On 08/01/15 02:02, Anand Somani wrote:
Hi,
We have a 3 node cluster (on VM). Eg. host1, host2, host3. One of the VM
Hi,
We have a 3 node cluster (on VM). Eg. host1, host2, host3. One of the VM
rebooted (host1) and when host1 came up it would see the others as down and
the others (host2 and host3) see it as down. So we restarted host2 and now
the ring seems fine(everybody sees everybody as up).
But now the
Hi,
It seems like it should be possible to have a keyspace replicated only to a
subset of DC's on a given cluster spanning across multiple DCs? Is there
anything bad about this approach?
Scenario
Cluster spanning 4 DC's = CA, TX, NY, UT
Has multiple keyspaces such that
* keyspace_CA_TX -
Hi
We have enabled cassandra client authentication and have set new user/pass
per keyspace. As I understand user/pass is stored in the system table, do
we need to change the replication factor of the system table so this data
is replicated? The cluster is going to be multi-dc.
Thanks
Anand
Correction credentials are stored in the system_auth table, so it is
ok/recommended to change the replication factor of that keyspace?
On Tue, Apr 29, 2014 at 10:41 PM, Anand Somani meatfor...@gmail.com wrote:
Hi
We have enabled cassandra client authentication and have set new user/pass
per
Have you tried nodetool rebuild for that node? I have seen that work when
repair failed.
On Wed, Apr 2, 2014 at 11:44 AM, Redmumba redmu...@gmail.com wrote:
Cassandra 1.2.15, using commodity hardware.
On Tue, Apr 1, 2014 at 6:37 PM, Robert Coli rc...@eventbrite.com wrote:
On Tue, Apr 1,
Hi,
Scenario is a cluster spanning across datacenters and we use Local_quorum
and want to know when things are not getting replicated across data
centers. What is the best way to track/alert on that?
I was planning on using the HintedHandOffManager (JMX)
=
or processes?
On Wed, Apr 3, 2013 at 8:49 AM, Anand Somani meatfor...@gmail.com wrote:
Hi,
I am running some tests trying to scale out our application from using a
3 node cluster to 6 node cluster. The thing I observed is that when using a
3 node cluster I was able to handle abt 41 req
RF=3.
On Thu, Apr 4, 2013 at 7:08 AM, Cem Cayiroglu cayiro...@gmail.com wrote:
What was the RF before adding nodes?
Sent from my iPhone
On 04 Apr 2013, at 15:12, Anand Somani meatfor...@gmail.com wrote:
We are using a single process with multiple threads, will look at client
side delays
Hi,
I am running some tests trying to scale out our application from using a 3
node cluster to 6 node cluster. The thing I observed is that when using a 3
node cluster I was able to handle abt 41 req/second, so I added 3 more
nodes thinking it should close to double, but instead it only goes upto
in
/var/lib/cassandra/data/KS_NAME/CF_NAME/SSTable.data Is the data in the
right place ?
Cheers
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 13/12/2012, at 6:54 AM, Anand Somani meatfor...@gmail.com wrote:
Hi,
We
Hi,
Have a requirement to do a multi dc low latency application. This will be
in an active/standby setup. So I am planning on using LOCAL_QUORUM for
writes. Now if there is a hard requirement of maximum loss of data (on a dc
destruction) to some minutes,
- In cassandra what is the recommended
In my tests I have seen repair sometimes take a lot of space (2-3 times),
cleanup did not clean it, the only way I could clean that was using major
compaction.
On Sun, Sep 18, 2011 at 6:51 PM, Yan Chunlu springri...@gmail.com wrote:
while doing repair on node3, the Load keep increasing,
into consideration https://issues.apache.org/jira/browse/CASSANDRA-3047
Good luck.
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 14/09/2011, at 8:41 AM, Anand Somani wrote:
Hi,
Just trying to setup a cluster of 4
So I should be able to do rolling upgrade from 0.7 to 1.0 (not there in the
release notes, but I assume that is work in progress).
Thanks
On Thu, Sep 15, 2011 at 1:36 PM, amulya rattan talk2amu...@gmail.comwrote:
Isn't this levelDB implementation for Google's LevelDB?
On Tue, Sep 13, 2011 at 3:57 PM, Peter Schuller peter.schul...@infidyne.com
wrote:
I think it is a serious problem since I can not repair. I am
using cassandra on production servers. is there some way to fix it
without upgrade? I heard of that 0.8.x is still not quite ready in
Hi,
Upgraded from 7.4 to 7.8, noticed that StorageProxy (under cassandra.db) is
no longer exposed, is that intentional? So the question are these covered
somewhere else?
Thanks
Anand
.
On Tue, Sep 13, 2011 at 11:53 AM, Anand Somani meatfor...@gmail.comwrote:
Hi,
Upgraded from 7.4 to 7.8, noticed that StorageProxy (under cassandra.db)
is no longer exposed, is that intentional? So the question are these covered
somewhere else?
Thanks
Anand
Hi,
Just trying to setup a cluster of 4 nodes for multiDC scenario - with 2
nodes in each DC. This is all on the same box just for testing the
configuration aspect. I have configured things as
- PropertyFile
- 127.0.0.4=SC:rack1
127.0.0.5=SC:rack2
127.0.0.6=AT:rack1
.
On Thu, Sep 8, 2011 at 3:14 PM, Anand Somani meatfor...@gmail.com wrote:
Hi,
Have a requirement, where data is spread across multiple DC for disaster
recovery. So I would use the NTS, that is clear, but I have some
questions
with this scenario
I have 2 Data Centers
RF - 2 (active DC
Hi,
Have a requirement, where data is spread across multiple DC for disaster
recovery. So I would use the NTS, that is clear, but I have some questions
with this scenario
- I have 2 Data Centers
- RF - 2 (active DC) , 2 (passive DC)
- with NTS - Consistency level options are -
Hi
Currently we are using 0.7.4 and was wondering if I should upgrade to
0.7.8/9 or move to 0.8? Is anybody using 0.8 in production and what is their
experience?
Thanks
Hi,
If I have a cluster with 15-20T nodes, somethings that I know will be a
potential problem are
- Compactions taking longer
- Higher read latencies
- Long time for adding/removing nodes
What are other things that can be problematic with big nodes?
Regards
Anand
http://www.thelastpickle.com
On 25/08/2011, at 3:22 AM, Anand Somani wrote:
So I have looked at the cluster from
- Cassandra-client - describe cluster = shows correctly - 3 nodes
- used the StorageService - JMX bean =UnreachableNodes - shows 0
If all these show the correct ring state
in log files not been deleted
https://issues.apache.org/jira/browse/CASSANDRA-2829
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 22/08/2011, at 4:56 AM, Anand Somani wrote:
We have a lot of space on /data, and looks
about phantom nodes.
On Wed, Aug 24, 2011 at 8:01 AM, Anand Somani meatfor...@gmail.com wrote:
So, I restarted the cluster (not rolling), but it is still maintaining
hints for the IP's that are no longer part of the ring. nodetool ring shows
things correctly (as only 3 nodes).
When I check thru
Hi,
7.4, 3 node cluster, RF=3
Load has not changed much, on 2 of the 3 nodes the commit log filled up in
less than a minute (did not give a chance to recover). Now have been running
this cluster for abt 2-3 months without any problem. At this point I do not
see any unusual load (continue to
exercise I went thru
on Saturday. Somehow can this get worse with cleanup, hinted hand off,
etc
When does the actual commit-data file get deleted.
The flush interval on all my memtables is 60 minutes
Thanks
On Sun, Aug 21, 2011 at 8:43 AM, Anand Somani meatfor...@gmail.com wrote:
Hi,
7.4
We have a lot of space on /data, and looks like it was flushing data fine
from file timestamps.
We did have a bit of goofup with IP's when bringing up a down node (and the
commit files have been around since then). Wonder if that is what triggered
it and we have a bunch of hinted handoff's being
0.7.4/ 3 node cluster/ RF -3 /Quorum read/write
After I re-introduced a corrupted node, followed the process as (thanks to
folks on the mailing list for helping me) listed on the operations wiki to
handle failures.
Still doing a cleanup on one node at this point. But I noticed that I am
seeing
%
113427455640312821154458202477256070485
What are my choices here, how do I clean up the ring? The other 2 nodes show
the ring fine (not even aware of 189)
Thanks
Anand
On Fri, Aug 19, 2011 at 11:53 AM, Anand Somani meatfor...@gmail.com wrote:
ok I will go with the IP change strategy and keep you posted. Not going
Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 19/08/2011, at 11:57 AM, Anand Somani wrote:
Hi,
version - 0.7.4
cluster size = 3
RF = 3.
data size on a node ~500G
I want to do some disk maintenance on a cassandra node, so the process that
I came up
Let me be specific on lost data - lost a replica , the other 2 nodes have
replicas
I am running read/write at quorum. At this point I have turned off my
clients from talking to this node. So if that is the case I can potentially
just nodetool repair (without changing IP). But would it be better
ok I will go with the IP change strategy and keep you posted. Not going to
manually copy any data, just bring up the node and let it bootstrap.
Thanks
On Fri, Aug 19, 2011 at 11:46 AM, Peter Schuller
peter.schul...@infidyne.com wrote:
(Yes, this should definitely be easier. Maybe the most
Hi,
version - 0.7.4
cluster size = 3
RF = 3.
data size on a node ~500G
I want to do some disk maintenance on a cassandra node, so the process that
I came up with is
- drain this node
- back up the system data space
- rebuild the disk partition
- copy data from another node
- copy
Hi
I am using 0.7.4 and am seeing this exception my logs a few times a day,
should I be worried? Or is this just a intermittent network disconnect
ERROR [RequestResponseStage:257] 2011-08-19 03:05:30,706
AbstractCassandraDaemon.java (line 112) Fatal exception in thread
Hi,
Using thrift and get_range_slices call with tokenrange. Using Random
Partionioner. Have only tried this on 0.7.5
Used to work in 0.6.4 or earlier version for me , but I notice that it does
not work for me anymore. The need is to iterate over a token range to do
some bookkeeping.
The logic is
From what I know you cannot create secondary indexes on SCF. You should have
gotten this = https://issues.apache.org/jira/browse/CASSANDRA-1813 on index
creation.
On Fri, May 20, 2011 at 6:56 AM, Monkey me monkey1024.pub...@gmail.comwrote:
Hi,
I have a SCF, Key is string, super column is
I should have clarified we have 3 copies, so in that case as long as 2 match
we should be ok?
Even if there were checksumming at the SStable level, I assume it has to
check and report these errors on compaction (or node repair)?
I have seen some JIRA open on these issues ( 47 and 1717), but if I
Hi,
Our application space is such that there is data that might not be read for
a long time. The data is mostly immutable. How should I approach
detecting/solving the bitrot problem? One approach is read data and let read
repair do the detection, but given the size of data, that does not look
Using it for storing large immutable objects, like Aaron was suggesting we
are splitting the blob across multiple columns. Also we are reading it a few
columns at a time (for memory considerations). Currently we have only gone
upto about 300-400KB size objects.
We do have machines with 32Gb
:
- What is the size of nodes (in terms for data)?
- How long have you been running?
- Howz compaction treating you?
Thanks,
Naren
On Thu, Jan 27, 2011 at 12:13 PM, Anand Somani meatfor...@gmail.comwrote:
Using it for storing large immutable objects, like Aaron was suggesting we
It is a little slow not to the point where it concerns me (only have few
tests for now), but keeps things very clean so no surprise effects.
On Thu, Jan 20, 2011 at 6:33 PM, Roshan Dawrani roshandawr...@gmail.comwrote:
On Fri, Jan 21, 2011 at 5:14 AM, Anand Somani meatfor...@gmail.comwrote
Here is what worked for me, I use testNg, and initialize and createschema in
the @BeforeClass for each test
- In the @AfterClass, I had to drop schema, otherwise I was getting the
same exception.
- After this I started getting port conflict with the second test, so I
added my own
Interesting idea, .
If it is like dividing the entire load on the system by 6, so if the
effective load is still the same and used SSD's for commit volume we could
get away with 1 commitlog SSD. Even if these 6 instances can handle 80% of
the load (compared to 1 on this machine), that might be
Hi
Problem:
Call - client.get_range_slices(). Using tokens (not keys), fails with
TimedoutException which I think is misleading (Read on)
Server : Works with 6.5 server, but not with 6.6 or 6.8
Client: have tried both 6.5 and 6.6
I am getting a TimedoutException when I do a
; token-based queries have to be on
non-wrapping ranges (left token right token), or a wrapping range of
(mintoken, mintoken). This was changed as part of the range scan
fixes post-0.6.5.
On Mon, Nov 15, 2010 at 6:32 PM, Anand Somani meatfor...@gmail.com
wrote:
Hi
Problem:
Call
Hi,
I am trying to iterate over the entire dataset to calculate some
information. Now the way I am trying to do this is by going directly to the
node that has a data range, so here is the route I am following
- get TokenRange using - describe_ring
- then for each tokenRange pick a node and
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