Cassandra MasterClass - The Big Mistake - Hosted by AxonOps

Hi Folks, Thursday 1/23 at 9a PT AxonOps is hosting a webinar with Jon Haddad and myself covering our operational mindset, common operational problems, and how to approach them. This webinar is a mini version of the Cassandra Operator Excellence training Jon and I offer. AxonOps will be giving awa

Re: Resources on Using Single Vnode in Cassandra

Hi Long, This is the best resource on understanding tokens per node and their impact on operations / availability: https://jolynch.github.io/pdf/cassandra-availability-virtual.pdf I am one of those users that used a single token. It does make certain operations simpler but it comes with a cost: c

[ANNOUNCE] 3.0.23/3.0.24/3.11.9/3.11.10 Can Potentially Corrupt Data During Schema Changes

The bug reported in CASSANDRA-16735 [1] was known to cause corruption thought to be recoverable but can, in fact, induce *non-recoverable* corruption in some partitions. If you are not yet on 3.0.23, 3.0.24, 3.11.9, or 3.11.10, it is recommended you wait to upgrade until the Cassandra community rel

Testing Cassandra 4.0 Pre-releases on Windows

Hi Cassandra Users, The Cassandra dev community is looking for users of Cassandra running on windows to test compatibility of the 4.0 alpha / beta / rc releases. If you run on windows and have time / resources to test, please report any compatibility issues you find to the dev mailing list or JIR

Re: execute is faster than execute_async?

I’m not very familiar with the python client unfortunately. If it helps: In Java, async would return futures and at the end of submitting each batch you would block on them by calling get. Jordan On Wed, Dec 11, 2019 at 1:37 AM lampahome wrote: > > > Jordan West 於 2019年12月11日 週三

Re: execute is faster than execute_async?

Hi, Have you tried batching calls to execute_async with periodic blocking for the batch’s responses? I’ve witnessed this behavior as well with large or no batches and while I didn’t have time to investigate fully its likely due to message queuing behavior within Cassandra (pre-4.0). Smaller batche

Re: Mutation of bytes is too large for the maxiumum size of

Unfortunately, this can be pretty tricky to track down on the server. I’ve filed https://issues.apache.org/jira/browse/CASSANDRA-14781 since I was recently bit by this as well. Jordan On Mon, Sep 17, 2018 at 9:06 PM Saladi Naidu wrote: > Any clues on this topic? > > Naidu Saladi > > > On Thursd

Re: Scale SASI index

On Mon, Sep 17, 2018 at 10:52 PM onmstester onmstester wrote: > By adding new nodes to cluster, should i rebuild SASI indexes on all nodes > ? > It isn’t necessary and will result in redundant work. On new nodes the indexes will be built as data is streamed in. On existing nodes, compaction or c

Re: full text search on some text columns

On Tue, Jul 31, 2018 at 7:45 AM, onmstester onmstester wrote: > I need to do a full text search (like) on one of my clustering keys and > one of partition keys (it use text as data type). > For simple LIKE queries on existing columns you could give SASI ( https://docs.datastax.com/en/dse/5.1/cql

Re: JMX metric to report number failed WCL ALL

https://issues.apache.org/jira/browse/CASSANDRA-13289 is a new feature, not yet available (its merged into trunk), that I believe will let you monitor what you want. On Sun, Jul 22, 2018 at 4:03 AM, onmstester onmstester wrote: > I'm using RF=2 and Write consistency = ONE, is there a counter in

Re: Compaction process stuck

>From the output you shared, it looks like you have at least one *very* large partition — my guess is its lots of very small rows per partition. This would explain why the slow compaction and why "nodetool stop compaction" didn’t work (prior to CASSANDRA-14397 stop only works between partitions).