Re: Repair scheduling tools

Is the fundamental nature of sstable fragmentation the big wrench here? I've been trying to imagine aids like an offline repair resolver or a gradual node replacement/regenerator process that could serve as a backstop/insurance for compaction and repair problems. After all, some of the "we don't ev

Re: Repair scheduling tools

So reading ( https://www.datastax.com/dev/blog/anticompaction-in-cassandra-2-1)... anticompaction problems from repair seem related to the fact that the sstables for a repair range can have data that isn't in the repaired data range, so we then have an sstable with the repaired data (I'm ... guessi

Quantifying Virtual Node Impact on Cassandra Availability

Josh Snyder and I have been working on evaluating virtual nodes for large scale deployments and while it seems like there is a lot of anecdotal support for reducing the vnode count [1], we couldn't find any concrete math on the topic, so we had some fun and took a whack at quantifying how different

Re: Quantifying Virtual Node Impact on Cassandra Availability

If the blob link on github doesn't work for the pdf (looks like mobile might not like it), try: https://github.com/jolynch/python_performance_toolkit/raw/master/notebooks/cassandra_availability/whitepaper/cassandra-availability-virtual.pdf -Joey

Re: Repair scheduling tools

This thread is mainly focused on how repairs are scheduled, not implementation details of how the repairs themselves work. On 4/16/18, 11:07 AM, "Carl Mueller" wrote: So reading ( https://www.datastax.com/dev/blog/anticompaction-in-cassandra-2-1)... anticompaction problems from rep