I will setup a Elasticsearchcluster for logging (Elasticsearch, Logstash Kibana). I have 2 "old" Database servers with 128 GB RAM 2x 12 core 4x 3.4 TB SAS 7200 rpm and 700 GB PCI-X-SSD. What is the best setup for this hardware?
- (2 nodes per server) RAID 5 with all disks (ext4 or xfs), SSD as bcache device
- (2 nodes per server) zfs and the SSD as L2ARC and ZIL
- hot-warm-architecture: one node on the SSD for the daily logs and one node on a RAID 5
The RAID 5 is for the redundancy of the OS.