Storage requirements

Data One uses different types of storage for different purposes. Here is a recap:

• CEMAN shared file system

  • This is a dedicated shared file system internally used by all CEMAN cluster nodes to store product state information, including AMQ Broker message store

  • This file system must be an NFS 4.1, mounted as indicated earlier on this page

• STENG shared file system

  • This is a dedicated shared file system internally used by all STENG cluster nodes to store product state information, including Data Mover key store and trust store

  • This file system must be an NFS 4.1, mounted as indicated earlier on this page

• Storage classes

  • Storage Class is Data One abstractions over the notion of "disk", where to stage files waiting to be consumed and or transferred (see also Storage Classes), virtual paths in a virtual file system are underpinned by physical storage described in storage class (see also Virtual File Systems (VFS))

  • Several storage class types are supported, each one with its own specific requirements

  • A commonly used storage class is the Shared File System Storage Class, which can be underpinned by any shared file system supporting concurrent access, real-time synchronization, and immediate visibility across cluster nodes

    • The product has been certified using a Shared File System based on NFS 4.1 mounted exactly like the previously discussed STENG shared file system

• File Event Listener monitored locations

  • File Event Listener is a Data One feature that monitors changes to files residing on some monitored locations and triggers contracts to process them (see also File Event Listener)

  • Monitored locations are file systems, SMB3 shares, and or remote SFTP Servers not directly managed by Data One but simply used as a source for customer-provided input files to be processed

  • Irrespective of monitored location types, File Event Listener persists internal state information on a dedicated shared file system, which requires an NFS 4.1 shared file system mounted as indicated in File Event Listener:

    nfsvers=4.1,sec=sys,sync,intr,noac,hard,lookupcache=none,timeo=50,retrans=2