Content-type: text/html Man page of sys_attrs_presto


Section: File Formats (5)
Index Return to Main Contents


sys_attrs_presto - presto subsystem attributes  


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.



Guide to Prestoserve

System Configuration and Tuning




This document was created by man2html, using the manual pages.
Time: 02:43:05 GMT, October 02, 2010