Hmmm ... Not familiar with JBOD. Is that just RAID-0? Also ... wrt the container talk, is that a Docker container you're talking about?
On Thu, May 21, 2015 at 12:48 PM, Jonathan Haddad <j...@jonhaddad.com> wrote: > If you run it in a container with dedicated IPs it'll work just fine. > Just be sure you aren't using the same machine to replicate it's own data. > > On Thu, May 21, 2015 at 12:43 PM Manoj Khangaonkar <khangaon...@gmail.com> > wrote: > >> +1. >> >> I agree we need to be able to run multiple server instances on one >> physical machine. This is especially necessary in development and test >> environments where one is experimenting and needs a cluster, but do not >> have access to multiple physical machines. >> >> If you google , you can find a few blogs that talk about how to do this. >> >> But it is less than ideal. We need to be able to do it by changing ports >> in cassandra.yaml. ( The way it is done easily with Hadoop or Apache Kafka >> or Redis and many other distributed systems) >> >> >> regards >> >> >> >> On Thu, May 21, 2015 at 10:32 AM, Dan Kinder <dkin...@turnitin.com> >> wrote: >> >>> Hi, I'd just like some clarity and advice regarding running multiple >>> cassandra instances on a single large machine (big JBOD array, plenty of >>> CPU/RAM). >>> >>> First, I am aware this was not Cassandra's original design, and doing >>> this seems to unreasonably go against the "commodity hardware" intentions >>> of Cassandra's design. In general it seems to be recommended against (at >>> least as far as I've heard from @Rob Coli and others). >>> >>> However maybe this term "commodity" is changing... my hardware/ops team >>> argues that due to cooling, power, and other datacenter costs, having >>> slightly larger nodes (>=32G RAM, >=24 CPU, >=8 disks JBOD) is actually a >>> better price point. Now, I am not a hardware guy, so if this is not >>> actually true I'd love to hear why, otherwise I pretty much need to take >>> them at their word. >>> >>> Now, Cassandra features seemed to have improved such that JBOD works >>> fairly well, but especially with memory/GC this seems to be reaching its >>> limit. One Cassandra instance can only scale up so much. >>> >>> So my question is: suppose I take a 12 disk JBOD and run 2 Cassandra >>> nodes (each with 5 data disks, 1 commit log disk) and either give each its >>> own container & IP or change the listen ports. Will this work? What are the >>> risks? Will/should Cassandra support this better in the future? >>> >> >> >> >> -- >> http://khangaonkar.blogspot.com/ >> >
