HP XP P9500 Storage - Manual (Page 68)

Pool Capacity Consumed Metadata Writing File System OS
The default block size for these file
systems is 4 KB. This results in 33% of
the THP V-VOL acquiring THP pool
pages. If the file system block size is
changed to 2 KB or less then the THP
V-VOL Page consumption becomes
100%.
Size of THP V-VOL. Writes metadata in 52-MB
increments. UFS Solaris
Small (one page). Writes metadata to first block. VxFS
Size of THP V-VOL. Writes metadata in 8-MB
increments. JFS AIX
If you change the Allocation Group
Size settings when you create the file
system, the metadata can be written
to a maximum interval of 64 MB.
Approximately 65% of the pool is
used at the higher group size setting.
Small (one page). Writes metadata to first block. JFS2
Small (one page). Writes metadata to first block. VxFS
Small (one page). Writes metadata to first block. JFS (VxFs) HP-UX
Size of THP V-VOL. Writes metadata in 10-MB
increments. HFS
*See “Formatting LDEVs in a Windows environment” (page 103) ??remove this xref if RSD says to remove the topic??
Using Thin Provisioning and Smart Tiers with other P9500 products
Interoperability of THP V-VOLs and pool-VOLs
THP V-VOLs and pool-VOLs can be used in conjunction with other P9500 products. The following
table lists the operations that are permitted and not permitted.
Not permitted Permitted Product name (Guide name)
Performing operations on THP
pool-VOLs or THP V-VOLs. Not applicable Cache Residency (HP P9000
Performance for Open and Mainframe
Systems User Guide)
Using a THP V-VOL as a Snapshot
P-VOL. The maximum total number of Snapshot (HP P9000 Snapshot User
Guide) • Using a THP V-VOL as a Snapshot
P-VOL, S-VOL, or pool-VOL.
pools per storage system is 128.
•
Increasing the capacity of a THP
V-VOL used by Snapshot.
Snapshot pool limits the number of
THP pools.
• Discarding zero data, and running
Snapshot to the same THP V-VOL
(this operation is prohibited by the
microcode).
Performing operations on THP
pool-VOLs. Performing operations on THP V-VOLs. Data Retention (HP P9000
Provisioning for Open Systems User
Guide)
Performing operations on THP
pool-VOLs. Performing operations on THP V-VOLs. Database Validator (HP P9000
Database Validator User Guide)
68 Configuring thin provisioning