Chapter 6: DXi4000 Replication
Understanding Data Replication
Quantum DXi4000 User’s Guide
83
Caution:
A saved snapshot is necessary to recover your data at a
later time. For this reason, it is not enough to simply enable
replication for a share. You must also configure a
replication schedule (recommended) or perform manual
replication on a regular basis to send snapshots of the
share to the target system.
If the source system ever becomes unavailable, you can recover the
share on the target system using a saved snapshot. After you recover a
share, it is recreated on the target system and is available for use. Once
the source system becomes available again, you can perform a failback
operation to restore the share to its original location.
Directory/File Based
Replication
Like replication, Directory/File Based Replication sends data from a NAS
share to another system where it can be accessed. However, Directory/
File Based Replication differs in a number of important ways:
• Both replication and Directory/File Based Replication must be
enabled for the share.
• A unique Sync ID is used to associate the replicated share on the
source system with the share that will receive the replicated data on
the target system.
• You do not need to schedule or manually perform Directory/File
Based Replication through the remote management console.
Instead, replication is triggered when a file is closed or a period of
time after it is modified (NAS shares).
Note:
For CIFS shares, a file is replicated immediately after it is
closed. For NFS shares, a file is replicated after it has been
idle (not accessed) for several minutes.
• After directories and files are replicated using Directory/File Based
Replication, they are automatically recovered on the target system
and are immediately available for use. There is no need to first
recover the share to access its data.
• You must manually initiate a synchronization from the source
system on a regular basis. Synchronizing ensures that the contents
of the source share are exactly the same as the target share by
propagating deletions from the source system to the target system.
Summary of Contents for DXi4510
Page 1: ...User s Guide Quantum DXi4000 6 67092 03 Rev A...
Page 16: ...Tables xvi Quantum DXi4000 User s Guide...
Page 24: ...Preface xxiv Quantum DXi4000 User s Guide...
Page 42: ...Chapter 1 DXi4000 System Description Network Segmentation 18 Quantum DXi4000 User s Guide...
Page 52: ...Chapter 2 Basic Operations Locating Serial Numbers 28 Quantum DXi4000 User s Guide...
Page 272: ...Chapter 10 DXi4000 Utilities Reboot Shutdown 248 Quantum DXi4000 User s Guide...
Page 288: ...Appendix B Troubleshooting Common Problems and Solutions 264 Quantum DXi4000 User s Guide...