Re: (C)* stable version after 3.5

On Wed, Jul 13, 2016 at 11:32 AM, Anuj Wadehra wrote: > Why do you think that skipping 2.2 is not recommended when NEWS.txt > suggests otherwise? Can you elaborate? We test upgrading from 2.1 -> 3.x and upgrading from 2.2 -> 3.x equivalently. There should not be a

Re: Is my cluster normal?

In addition, it seems the compaction is very often. It happens like every couple of seconds and one after one. It seems causing high load. On Wed, Jul 13, 2016 at 10:32 AM, Yuan Fang wrote: > $nodetool tpstats > > ... > Pool Name Active

Re: Is my cluster normal?

$nodetool tpstats ... Pool Name Active Pending Completed Blocked All time blocked Native-Transport-Requests 128 1281420623949 1 142821509 ... What is this? Is it normal? On Tue, Jul 12, 2016 at 3:03 PM, Yuan Fang

Re: CPU high load

Might be more clear looking at nodetool tpstats >From there you can see all the thread pools and if there are any blocks. Could be something subtle like network. On Tue, Jul 12, 2016 at 3:23 PM, Aoi Kadoya wrote: > Hi, > > I am running 6 nodes vnode cluster with DSE

Re: (C)* stable version after 3.5

Hi Alain, This caught my attention: "Also I am not sure if the 2.2 major version is something you can skip while upgrading through a rolling restart. I believe you can, but it is not what is recommended." Why do you think that skipping 2.2 is not recommended when NEWS.txt suggests otherwise?

Re: NoHostAvailableException coming up on our server

Put the driver logs in debug mode to see what's happen.Btw I am surprised by the few requests by connections in your setup: .setConnectionsPerHost(HostDistance.LOCAL, 20, 20) .setMaxRequestsPerConnection(HostDistance.LOCAL, 128) It looks like a protocol v2 settings (Cassandra

Re: Is my cluster normal?

Sometimes, the Pending can change from 128 to 129, 125 etc. On Wed, Jul 13, 2016 at 10:32 AM, Yuan Fang wrote: > $nodetool tpstats > > ... > Pool Name Active Pending Completed > Blocked All time blocked > Native-Transport-Requests

ApacheCon: Getting the word out internally

Dear Apache Enthusiast, As you are no doubt already aware, we will be holding ApacheCon in Seville, Spain, the week of November 14th, 2016. The call for papers (CFP) for this event is now open, and will remain open until September 9th. The event is divided into two parts, each with its own CFP.

Re: CPU high load

Hi Patrick, In fact I couldn't see any thread pool named "shared". here is the result of tpstats from one of my nodes. Pool NameActive Pending Completed Blocked All time blocked MutationStage 0 0 173237609 0 0

1000 Cassandra Nodes running on Kubernetes 1.3

Just thought I'd share this big milestone for all Cassandra users! https://news.ycombinator.com/item?id=12089272

Open source equivalents of OpsCenter

Now that OpsCenter doesn't work with open source installs, are there any runs at an open source equivalent? I'd be more interested in looking at metrics of a running cluster and doing other tasks like managing repairs/rolling restarts more so than historical data.

Re: NoHostAvailableException coming up on our server

Thanks a lot for suggestion Romain, I have done the setup to see the driver logs, but haven't seen that error again. Also thanks for the MaxRequestPerConnection tip, I will change it to 32K. Regards, Abhinav On Wed, Jul 13, 2016 at 1:02 PM Romain Hardouin wrote: > Put the

Re: (C)* stable version after 3.5

Hi Anuj From https://docs.datastax.com/en/latest-upgrade/upgrade/cassandra/upgrdBestPractCassandra.html : >- Employ a continual upgrade strategy for each year. Upgrades are >impacted by the version you are upgrading from and the version you are >upgrading to. The greater the gap

Re: Open source equivalents of OpsCenter

we use datadog (metrics emitted as raw statsd) for the dashboard. All repair & compaction is done via blender & serf[1]. [1]https://github.com/pagerduty/blender On Wed, Jul 13, 2016 at 2:42 PM, Kevin O'Connor wrote: > Now that OpsCenter doesn't work with open source installs,

Re: Is my cluster normal?

Same behavior here with a very different setup.After an upgrade to 2.1.14 (from 2.0.17) I see a high load and many NTR "all time blocked". Offheap memtable lowered the blocked NTR for me, I put a comment on CASSANDRA-11363 Best, Romain Le Mercredi 13 juillet 2016 20h18, Yuan Fang

Re: CPU high load

Did you upgrade from a previous version? DId you make some schema changes like compaction strategy, compression, bloom filter, etc.?What about the R/W requests?  SharedPool Workers are... shared ;-) Put logs in debug to see some examples of what services are using this pool (many actually).

Re: CPU high load

Hi Romain, No, I don't think we upgraded cassandra version or changed any of those schema elements. After I realized this high load issue, I found that some of the tables have a shorter gc_grace_seconds(1day) than the rest and because it seemed causing constant compaction cycles, I have changed

Exclude a host from the repair process

If a node is down in my cluster. Is it possible to exclude him from the repair process in order to continue with the repair? If not Is the repair continue reparing the other replicas even if one is down? Best regards Jean Carlo "The best way to predict the future is to invent it" Alan Kay

Re: how to start a embed cassandra instance?

As for Achilles, no I start Cassandra in the same JVM. It is meant to be used for testing purpose only. I also faced dependency issue with different version of Guava so I excluded the Guava pulled by the Datastax Java driver to use the one pulled by C* itself:

Re: how to start a embed cassandra instance?

Do either cassandra-unit or Achilles fork Cassandra to a separate JVM? Guava libraries create a dependency hell with our current use of Hector's embedded server. We're starting to migrate to the Datastax Java driver with yet another guava version. I know Farsandra supports forking, so that was