HP XP Continuous Access Software - Manual (Page 189)

• NAS Sync Image (Required when copying the file system managed by NAS Sync Image
using Continuous Access XP Journal)
Notes on operations
• UID for user registration and GID for group registration in primary/secondary sites
With Continuous Access XP Journal, the file owner information (UID and GID in the primary site) and
quota and ACL information for each user (UID in the primary site) and group (GID in the primary site)
included in the source file system are copied to the secondary site. Note the UID for user registration
and GID for group registration in the primary and secondary sites (as explained in the following
sections) when you share the NFS/CIFS and set the quota or ACL in the target file system.
• Register the same user name (or group name) in both sites. The quota and ACL settings
are also the same.
For local authentication, assign the same UID (or GID) to the same user name (or group name)
in both sites. For NIS, share the NIS server in both sites. For domain authentication, share the
domain controller.
• Register the same user name (or group name) in both sites. (The quota or ACL settings are
different for each site.)
Set the quotas or ACLs again in the secondary site each time the Continuous Access XP Journal
volume pair is split.
• Register the user (or group) in only one site.
For local authentication, do not assign the target UID (GID) in another site to ensure that the UID is
not overlapped with the UID (or GID) of the another user in the another site.
For NIS, share the NIS server in both sites. For domain authentication, share the domain controller.
• Mounting the NFS client for a file system whose data is backed up online
If you perform online backup for a file system accessed by the NFS client by secondary copy, you must
specify NFS version 3 before mounting a NAS Blade file system on the NFS client. If you specify NFS
version 2, you must specify the hard option before mounting a NAS Blade file system on the NFS client.
• Limitations on Continuous Access XP operations due to the status of cluster, nodes, and resource
groups
When a cluster is not configured, the cluster is stopped, nodes are stopped, resource groups are
offline, and connecting the device file or creating and mounting a file system is restricted. Due to
these restrictions, the following operations performed in the target Continuous Access XP Journal
operation also end in error. Therefore, you should not operate the cluster, nodes, and resource
groups during the Continuous Access XP Journal operation. Should problems occur with the cluster,
nodes, or resource groups, fix them immediately.
• Unmount and mount the source file system during the splitting of a Continuous Access XP
Journal pair volume.
• Connect the target file system to the NAS package.
• Unmount and delete the target file system before the Continuous Access XP Journal pair is
resynchronized.
• Notes on changing system configuration during Continuous Access XP Journal operations
When changing the following system configurations during Continuous Access XP Journal operations,
you must change the RAID Manager XP configuration definition files in CL1 and CL2 to which the
Continuous Access XP Journal P-VOL is connected, and in CL1 and CL2 where the S-VOL is used:
• Changing fixed IP addresses
• Expanding or deleting source file systems
• Setting up, expanding, or releasing differential-data storage devices for NAS Sync Image
Continuous Access XP Journal user guide 189