HP-UX HB v13.00 Ch-14 - JFS

HP-UX Handbook – Rev 13.00 Page 3 (of 47)
Chapter 14 Journaled File System (JFS)
October 29, 2013
TABLE OF CONTENTS
Introduction: _____________________________________________________________________ 6
Veritas File System (VxFS) __________________________________________________________________ 6
Logging ________________________________________________________________________________ 6
Extents _________________________________________________________________________________ 7
File system disk layouts ____________________________________________________________________ 7
Veritas File System features _________________________________________________________ 8
Upgrading VxFS _________________________________________________________________________ 9
The upgrade process: ____________________________________________________________________ 10
Access Control Lists ______________________________________________________________________ 11
Quotas ________________________________________________________________________________ 12
Online backup __________________________________________________________________________ 13
Support for databases ____________________________________________________________________ 14
Cluster file systems ______________________________________________________________________ 14
File Change Log _________________________________________________________________________ 15
Multi-volume support ____________________________________________________________________ 15
Dynamic Storage Tiering __________________________________________________________________ 15
Veritas File System performance enhancements ________________________________________ 16
Improving I/O using vxtunefs ______________________________________________________________ 16
read_pref_io _________________________________________________________________________ 17
write_pref_io ________________________________________________________________________ 17
read_nstream ________________________________________________________________________ 17
write_nstream _______________________________________________________________________ 18
discovered_direct_iosz _________________________________________________________________ 18
fcl_keeptime _________________________________________________________________________ 18
fcl_maxalloc _________________________________________________________________________ 19
fcl_winterval _________________________________________________________________________ 19
hsm_write_ prealloc ___________________________________________________________________ 19
max_seqio_extent_size ________________________________________________________________ 20
initial_extent_size ____________________________________________________________________ 20
inode_aging_count ____________________________________________________________________ 20
max_buf_data_size ___________________________________________________________________ 20
inode_aging_size _____________________________________________________________________ 21
max_direct_iosz ______________________________________________________________________ 21
max_diskq __________________________________________________________________________ 21
max_seqio_extent_size ________________________________________________________________ 21
default_indir_ size ____________________________________________________________________ 22
qio_cache_enable ____________________________________________________________________ 22
read_ahead _________________________________________________________________________ 23
vx_era_nthreads______________________________________________________________________ 23
write_throttle ________________________________________________________________________ 23
Troubleshooting File System Problems ________________________________________________ 24
JFS Error Codes _________________________________________________________________________ 25
Recovering a Disabled File System ________________________________________________________ 25
VxFS Kernel Messages _________________________________________________________________ 25
Global Message IDs ___________________________________________________________________ 25
Message: 001 _____________________________________________________________________ 26
Message: 002 _____________________________________________________________________ 26