Re: Cluster schema version choosing

2019-05-20 Thread Stefan Miklosovic
My guess is that the "latest" schema would be chosen but I am definitely interested in in-depth explanation. On Tue, 21 May 2019 at 00:28, Alexey Korolkov wrote: > > Hello team, > In some circumstances, my cluster was split onto two schema versions > (half on one version, and rest on another) >

Re: Optimal Heap Size Cassandra Configuration

2019-05-20 Thread Elliott Sims
It's not really something that can be easily calculated based on write rate, but more something you have to find empirically and adjust periodically. Generally speaking, I'd start by running "nodetool gcstats" or similar and just see what the GC pause stats look like. If it's not pausing much or

Re: Table dropped during repair

2019-05-20 Thread Jeff Jirsa
Repair doesn’t have a mechanism to drop a table There are some race conditions in schema creation that can cause programmatic schema condition (especially when multiple instances of the app can race) to put things into a bad state. If this is the problem, you’d want to inspect the cfid in the

Re: Table dropped during repair

2019-05-20 Thread Oliver Herrmann
That's unlikely. We run the repair job from crontab every week when no application is connected to the cluster. We had the same error for another table for more than 3 weeks until we recreated it: ERROR [AntiEntropyStage:1] 2019-04-13 16:00:18,397 RepairMessageVerbHandler.java:177 - Table with id

Re: Table dropped during repair

2019-05-20 Thread Jeff Jirsa
Someone issued a drop table statement? -- Jeff Jirsa > On May 20, 2019, at 9:14 AM, Oliver Herrmann wrote: > > Hi, > > while we were running 'nodetool repair -full -dcpar' on one node we got the > following error: > > ERROR [AntiEntropyStage:1] 2019-05-18 16:00:04,808 >

Table dropped during repair

2019-05-20 Thread Oliver Herrmann
Hi, while we were running 'nodetool repair -full -dcpar' on one node we got the following error: ERROR [AntiEntropyStage:1] 2019-05-18 16:00:04,808 RepairMessageVerbHandler.java:177 - Table with id 5fb6b730-4ec3-11e9-b426-c3afc7dfebf6 was dropped during prepare phase of repair It looks like the

Optimal Heap Size Cassandra Configuration

2019-05-20 Thread Akshay Bhardwaj
Hi Experts, I have a 5 node cluster with 8 core CPU and 32 GiB RAM If I have a write TPS of 5K/s and read TPS of 8K/s, I want to know what is the optimal heap size configuration for each cassandra node. Currently, the heap size is set at 8GB. How can I know if cassandra requires more or less

Cluster schema version choosing

2019-05-20 Thread Alexey Korolkov
Hello team, In some circumstances, my cluster was split onto two schema versions (half on one version, and rest on another) In the process of resolving this issue, I restarted some nodes. Eventually, nodes migrated to one schema, but it was not clear why they choose exactly this version of schema?

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