Hi, Although it's not yet officially supported and it might still change in a minor release, guardrails config is also pluggable (CEP-3). It is possible to provide a custom implementation supplying guardrail properties different to those defined in cassandra.yaml, so the thresholds, flags, etc. can be based on things like, for example, who is running the guarded query.
On Tue, 26 Apr 2022 at 21:12, Henrik Ingo <henrik.i...@datastax.com> wrote: > Hi all > > As one would expect, I've been involved in several discussions lately on > what is going to make it into 4.1, versus what patches unfortunately won't. > > In particular debating this with Patrick McFaddin we realized that a big > theme in 4.1 appears to be a huge number of pluggability improvements. So > the intent of this email is to take an inventory of all new plugin APIs I'm > aware of, and invite the community to add to the list where I'm not aware > of some work. > > > CEP-9 > <https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-9%3A+Make+SSLContext+creation+pluggable> > Pluggable SSLContext. Allows to store SSL certs and secrets elsewhere than > in files. Supplies an example implementation for storing as Kubernetes > Secret. > > > *CEP-10* > <https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-10%3A+Cluster+and+Code+Simulations> > SimpleCondition, Semaphore, CountDownLatch, BlockingQueue, etc > Executors, futures, starting threads, etc - including important > improvements to consistency of approach in the codebase > The use of currentTimeMillis and nanoTime > The replacement of java.io.File with a wrapper on java.nio.files.Path > providing an ergonomic API, and some improvements to consistency of file > handling > Support for alternative streaming implementations > Improvements to the dtest API to support necessary functionality > > Commentary: Of the above at least the Path and alternative streaming > implementations seem like significant APIs that can be used for much more > than just fault injection. In fact, I believe java.nio.files.Path is what > we use in Astra Serverless to send files to S3 instead of local filesystem. > > > *CEP-11* > <https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-11%3A+Pluggable+memtable+implementations> > Pluggable memtable > > Commentary: While we won't have any new memtable implementations in 4.1, > it is a goal to merge the memtable API this week. Notably, since this is > designed to support also persistent memtables (ie memtable on persistent > memory), this new API could essentially be seen as a full blown storage > engine API. > > > *CASSANDRA-17044* <https://issues.apache.org/jira/browse/CASSANDRA-17044> > Pluggable schema management > > I hear rumors someone may be working on a new schema management > implementation? > > > (Just for completeness, CASSANDRA-17058 > <https://issues.apache.org/jira/browse/CASSANDRA-17058> pluggable cluster > membership is not merged.) > > CEP-16 > <https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-16%3A+Auth+Plugin+Support+for+CQLSH> > While client side, worth mentioning: Pluggable auth for CQLSH > > > > If there are more that I don't know about, please reply and add to the > list. > > henrik > > -- > > Henrik Ingo > > +358 40 569 7354 <358405697354> > > [image: Visit us online.] <https://www.datastax.com/> [image: Visit us > on Twitter.] <https://twitter.com/DataStaxEng> [image: Visit us on > YouTube.] > <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.youtube.com_channel_UCqA6zOSMpQ55vvguq4Y0jAg&d=DwMFaQ&c=adz96Xi0w1RHqtPMowiL2g&r=IFj3MdIKYLLXIUhYdUGB0cTzTlxyCb7_VUmICBaYilU&m=bmIfaie9O3fWJAu6lESvWj3HajV4VFwgwgVuKmxKZmE&s=16sY48_kvIb7sRQORknZrr3V8iLTfemFKbMVNZhdwgw&e=> > [image: Visit my LinkedIn profile.] > <https://www.linkedin.com/in/heingo/> >
