====== Secondary name node ======
See [[Name node]].

**NOT HIGH AVAILBILITY** :!:
===== Uses =====
  * "System restore" for [[Name node]]
  * Resopnsibole of keeping less dataloss if the [[Name node]] is failed


===== How it works =====
  * Structure
    * fsImage
    * Edit Logs
  * Every hour copy [[Edit log]] and [[fsImage]] from [[Name node]]
  * If [[Name node]] failed - marges [[fsImage]] with [[Edit log]] of [[Secondary name node]] and reconstruct the [[Name node]]