HP 3PAR X9000 File Serving Software (IBRIX) Implementation Guide (QL226-96987, June 2013)

The following example displays a VLUN exported to a host set.
# showvlun -t
Lun VVName HostName -Host_WWN/iSCSI_Name- Port Type
0 TESTLUNS.0 set:X9000 ---------------- --- host
If you use HP 3PAR thinly-provisioned volumes with HP StoreAll OS software, the volume state will
remain thin when the StoreAll file system is created. The files system will use only a small space of
storage for creation of inode tables and does not scrub the whole volume.
CAUTION: If the thinly-provisioned volume runs out of space, the results are catastrophic to the
StoreAll 9300 file system and cause corruption. Storage administrators should ensure additional
storage is added when a low space alert is triggered on the HP 3PAR StoreServ Storage.
NOTE: The current version of the HP StoreAll OS software does not support file system storage
space reclaim from thinly provisioned volumes.
Restrictions on Volume Size and Number
Follow the guidelines for creating VVs and VLUNs in the HP 3PAR Command Line Interface
Administrator’s Manual while adhering to these cautions and guidelines:
• This configuration supports sparse LUNs (meaning that LUNs may be skipped). LUNs may
also be exported in non-ascending order (e.g. 0, 5, 7, 3).
• HP StoreAll OS software supports a maximum of 15 segment ownership per file serving node.
Each segment is one LUN. Carefully plan the number of LUNs to be exported based on the
number of HP StoreAll 9300 Gateway Storage nodes in the cluster for performance impact.
For example, you can export a maximum of 30 LUNs for a two node cluster so that each file
serving node can own 15 segments or LUNs.
• A given storage volume is exported to the host on a specific user-selected LUN ID. Although
the HP 3PAR StoreServ Storage supports exports in the range of 0 to 16,383, it is recommended
that lower order LUN IDs are used, not exceeding LUN ID 255. Use the HP 3PAR OS CLI
command createvlun <VV_name> <LUN> <host_name>.
• The maximum LUN size that can be exported to an HP StoreAll 9300 Gateway Storage node
is 8 TB (8192 GB) with HP 3PAR OS version 2.3.x, OS 3.1.x, or later. HP StoreAll OS software
will return an error when creating file segments for LUN sizes greater than 8 TB. Consider the
performance impact with large volume size LUNs as a given segment/LUN is owned by one
StoreAll 9300 node and performance would be impacted if all I/O needs to be serviced by
one node.
HP StoreAll OS Software Usage
CAUTION:
The HP StoreAll Management GUI provides an Add Vendor Storage option under the Vendor
Storage tab and is not required to add the HP 3PAR array. Storage arrays listed under Vendor
Storage gives additional features such as snapshots from the StoreAll OS software. These are not
yet supported with HP 3PAR systems, but instead can be performed by the storage array CLI
commands. Refer to the HP 3PAR CIM API Programming Reference on taking snapshots of the
volumes. Use the Discover option on the Storage tab to discover storage volumes.
Configuring and Discovering Virtual Volumes
This section provides information about exporting virtual volumes from the HP 3PAR StoreServ
Storage and discovering them in the StoreAll 9300 host. VVs can be created from physical disks
24 Storage Allocation for Access by the HP StoreAll 9300 and HP 3PAR StoreServ Storage Usage