IBM Hub/Switch Installation Manual page 365

Table 6-28 NFS Daemon Configuration Variables (Continued)
Display Field Name
Buffer Size
Cache Entries
Memory Buffers
Cache File (Unix)
CheckPoint File (Unix)
Cleanup Threads
HPSS Installation Guide
Release 4.5, Revision 2
Description
The size of a single data
cache entry.
Advice: This value is the amount of data read from and written to HPSS by the data
cache layer at a time. Is is recommended that this value be a multiple of 8 KB and, if
possible, a power of 2. When multiplied by the number of Memory Buffers, this value
is the amount of memory that will be used by the data cache layer. When multiplied
by the number of Cache Entries, it represents the amount of disk space used by the
Cache file.
The number of data cache
entries stored on local
disk.
Advice: When multiplied by the Buffer Size, this value represents the amount of disk
used to hold the data cache entries locally in the Cache file.
The number of buffers to
allocate in memory.
Advice: When multiplied by the Buffer Size, this value represents the RAM used to
hold cache entries while they are being worked on. This value must be at least 3.
The name of a local UNIX
disk file that contains the
cached entries.
Advice: The size of this file can be determined by multiplying Buffer Size by Cache
Entries
The name of a local UNIX
disk file that contains the
status information for the
cached entries stored in the
Cache file. Its size is
related to the number of
the cached entries, but it is
much smaller than the
Cache file.
The number of threads
dedicated to writing dirty
cache entries back to
HPSS.
Advice: This value should be small because extra, temporary cleanup threads are
spawned as needed. Each non-temporary cleanup thread wakes up every Thread
Interval seconds to look for dirty entries.
September 2002
Chapter 6
Acceptable Values
Any positive 32-bit integer value.
Any positive 32-bit integer value.
Any positive 32-bit integer value.
Any valid, fully qualified UNIX file
name.
Any valid, fully qualified UNIX file
name.
Any positive 32-bit integer value.
HPSS Configuration
Default
Value
500 KB
100
10
/var/hpss/nfs/
cachefile.nfs
/var/hpss/nfs/
checkpoint.nf
s
1
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