This is an old revision of the document!
Table of Contents
Name node
MOST IMPORATANT FOR CLUSTER! - in-memory location of every Data block in cluster / rack
- Controlls DataNodes
- FS Ops
- Block Mapping
Requriements
- Should have LOT OF RAM, LOT OF MEM, LOT OF POWER
Structure
- RAM
- FILE
When proccess of Reboot or Checkpoint the RAM\fsImage marges with Edit log to FILE\fsImage file that makes it to keep presistnece.
