High availability when creating "in memory" index without persisting the index into a storage

Elastic Stack Elasticsearch
6

Yes, an in memory index is replicated across the cluster, and if one node
fails, then you have a replica. Note, the internal transaction log used in
elasticsearch is always file based one. I highly suggest just using the file
system based one, its simpler, and you can use the mmapfs one for better
perf. why do you want it to be in memory one?

On Wed, Oct 5, 2011 at 3:15 PM, Spico Florin spicoflorin@gmail.com wrote:

Hello!
We have the following scenario:

  1. we would like to maintain an index of documents in memory
  2. we don't want to keep the index persisted in a storage.
    Practically, our index works as temporary index in memory where we add new
    documents and delete the obsoleted ones.
    Under these circumstances, if a node fails, the indexed data contained in
    it will be available on the cluster? Meaning, is the in-memory index
    replicated over the cluster?

We look forward for your answers.

Thank you.
Regards,
Florin