Try repair -pr on all nodes.
If after that you still have issues, you can try to rebuild the SSTables using
nodetool upgradesstables or scrub.
Regards,
Roni Balthazar
Em 18/02/2015, às 14:13, Ja Sam ptrstp...@gmail.com escreveu:
ad 3) I did this already yesterday (setcompactionthrouput
As Al Tobey suggest me I upgraded my 2.1.0 to snaphot version of 2.1.3. I
have now installed exactly this build:
https://cassci.datastax.com/job/cassandra-2.1/912/
I see many compaction which completes, but some of them are really slow.
Maybe I should send some stats form OpsCenter or servers? But
Ja, Please upgrade to official 2.1.3 we've fixed many things related to
compaction. Are you seeing the compactions % complete progress at all?
On Wed, Feb 18, 2015 at 11:58 AM, Roni Balthazar ronibaltha...@gmail.com
wrote:
Try repair -pr on all nodes.
If after that you still have issues, you
The ”natural” dependency of Cassandra is the JRE (not the JDK) - e.g. in the
Debian package.
You should be safe using JRE instead of JDK.
If you’re asking whether to use a non-Oracle JVM - the answer would be: use the
Oracle JVM.
OpenJDK might work, but I’d not recommend it.
Am 18.02.2015 um
On Wed, Feb 18, 2015 at 4:02 AM, Tomer Pearl tomer.pe...@contextream.com
wrote:
My question is what is the consequences of deleting this file every time
the node is starting up? Performance wise or other.
You waste the time Cassandra spends to regenerate it.
I personally would not institute
Hi,
Couple of times a day 2 out of 4 members cluster nodes are killed
root@db4:~# dmesg | grep -i oom
[4811135.792657] [ pid ] uid tgid total_vm rss cpu oom_adj
oom_score_adj name
[6559049.307293] java invoked oom-killer: gfp_mask=0x201da, order=0,
oom_adj=0, oom_score_adj=0
Nodes are
On Wed, Feb 18, 2015 at 10:28 AM, Michał Łowicki mlowi...@gmail.com wrote:
Couple of times a day 2 out of 4 members cluster nodes are killed
This sort of issue is usually best handled/debugged interactively on IRC.
But briefly :
- 2.1.2 is IMO broken for production. Downgrade (officially
Yes you can use Oracle JDK if your prefer, I've been using the JDK with
Cassandra in production for years without issue.
Regards,
Mark
On 18 February 2015 at 19:49, cass savy casss...@gmail.com wrote:
Can we install Oracle JDK instead of JRE in Cassandra servers? We have
few clusters running
Thanks Mark for quick response. What version of Cassandra and JDK are you
using in Prod.
On Wed, Feb 18, 2015 at 11:58 AM, Mark Reddy mark.l.re...@gmail.com wrote:
Yes you can use Oracle JDK if your prefer, I've been using the JDK with
Cassandra in production for years without issue.
Thanks Robert for quick response. I use Oracle JDK and not OpenJDK.
On Wed, Feb 18, 2015 at 11:54 AM, Robert Stupp sn...@snazy.de wrote:
The ”natural” dependency of Cassandra is the JRE (not the JDK) - e.g. in
the Debian package.
You should be safe using JRE instead of JDK.
If you’re
Hello,
I have received the following error
ERROR [SSTableBatchOpen:2] 2015-01-19 13:55:28,478 CassandraDaemon.java (line
196) Exception in thread Thread[SSTableBatchOpen:2,5,main]
java.lang.OutOfMemoryError: Java heap space
at
I don't have problems with DC_B (replica) only in DC_A(my system write only
to it) I have read timeouts.
I checked in OpsCenter SSTable count and I have:
1) in DC_A same +-10% for last week, a small increase for last 24h (it is
more than 15000-2 SSTables depends on node)
2) in DC_B last 24h
Hello,
Please note that DataStax has updated the documentation for replacing a
seed node. The new docs outline a simplified process to help avoid the
confusion on this topic.
http://www.datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_replace_seed_node.html
Jonathan
Hi,
Thanks for your tip it looks that something changed - I still don't know
if it is ok.
My nodes started to do more compaction, but it looks that some compactions
are really slow.
In IO we have idle, CPU is quite ok (30%-40%). We set compactionthrouput to
999, but I do not see difference.
Can
1) we tried to run repairs but they usually does not succeed. But we had
Leveled compaction before. Last week we ALTER tables to STCS, because guys
from DataStax suggest us that we should not use Leveled and alter tables in
STCS, because we don't have SSD. After this change we did not run any
Hello,
I have decommissioned a node, deleted data,commitlog and saved caches, changed
yaml file to not include self ip and started it. For some reason I do not fully
understand, Opscenter says that the node is in an unknown datacenter. Nodetool
says UJ but shows ? in the Owns column. I have
Are you running repairs within gc_grace_seconds? (default is 10 days)
http://www.datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_repair_nodes_c.html
Double check if you set cold_reads_to_omit to 0.0 on tables with STCS
that you do not read often.
Are you using default values
You are right... Repair makes the data consistent between nodes.
I understand that you have 2 issues going on.
You need to run repair periodically without errors and need to decrease the
numbers of compactions pending.
So I suggest:
1) Run repair -pr on all nodes. If you upgrade to the new
Hi,
You can check if the number of SSTables is decreasing. Look for the
SSTable count information of your tables using nodetool cfstats.
The compaction history can be viewed using nodetool
compactionhistory.
About the timeouts, check this out:
Which error are you getting when running repairs?
You need to run repair on your nodes within gc_grace_seconds (eg:
weekly). They have data that are not read frequently. You can run
repair -pr on all nodes. Since you do not have deletes, you will not
have trouble with that. If you have deletes,
What is the maximum number of events that you expect in a day? What is the
worst-case scenario?
Mohammed
From: cass savy [mailto:casss...@gmail.com]
Sent: Wednesday, February 18, 2015 4:21 PM
To: user@cassandra.apache.org
Subject: Data tiered compaction and data model question
We want to track
Hi,
I'd like to log the client ID for every operation performed by the YCSB on
my Cassandra cluster.
The purpose is to identify analyze various other consistency measures
other than eventual consistency.
I wanted to know if people have done something similar in the past. Or am I
missing
We want to track events in log Cf/table and should be able to query for
events that occurred in range of mins or hours for given day. Multiple
events can occur in a given minute. Listed 2 table designs and leaning
towards table 1 to avoid large wide row. Please advice on
*Table 1*: not very
2.1.2 is IMO broken and should not be used for any purpose.
Use 2.1.1 or 2.1.3.
https://engineering.eventbrite.com/what-version-of-cassandra-should-i-run/
=Rob
Cool man. Thanks for the info. I just upgraded to 2.1.3. We'll see how that
goes. I can let you know more once it's been running
Robert,
Let me know if I’m off base about this—but I feel like I see a lot of posts
that are like this (i.e., use this arbitrary version, not this other arbitrary
version). Why are releases going out if they’re “broken”? This seems like a
very confusing way for new (and existing) users to
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