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Man page of sys_attrs_presto
sys_attrs_presto
Section: File Formats (5)
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NAME
sys_attrs_presto - presto subsystem attributes
DESCRIPTION
This reference page lists and describes attributes for the Prestoserve
(presto) kernel subsystem. Refer to the
sys_attrs(5)
reference page for an introduction to the topic of kernel subsystem attributes.
The Prestoserve product consists of optional hardware (NVRAM) and software
that must be installed on your system. See the
Guide to Prestoserve
for details
on Prestoserve. See the
System Configuration and Tuning
manual for information about
Prestoserve within the context of managing file system performance.
-
Size, in bytes, of the Prestoserve buffer hash table.
-
Default value: 256 (bytes)
-
Minimum value: 0
-
Maximum value:65536 (bytes, which equals 64 KB)
-
Increasing the value of the
presto-buffer-hash-size
attribute may improve throughput by decreasing Prestoserve lock contention.
-
A value that controls whether Prestoserve will cache only UFS and AdvFS file-system
metadata or both file-system metadata and synchronous-write data. If the attribute
is set to 1, Prestoserve caches only file-system metadata. If the attribute
is set to 0 (zero), both file-system metadata and synchronous-write data are
cached.
-
Default value: 0
-
Setting
prmetaonly
to 1 may improve the performance
of applications that access many small files, or applications that access
a large amount of file-system metadata but do not reread recently written
data.
SEE ALSO
sys_attrs(5)
Guide to Prestoserve
System Configuration and Tuning
Index
- NAME
-
- DESCRIPTION
-
- SEE ALSO
-
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