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access.istat

Verb: Access/Access: Verbs, Releases: AP and R83

Performs distribution analysis on existing file modulo.

Syntax

istat file.reference {itemlist} {modlist} {(options)}

Description

produces a graphic representation of item-id distribution within a file and suggests a new modulo.

It's counterpart is the 'hash-test' command.

Options

* see 'options: Access'.
r Provides additional information about indirect (pointer) items, which are otherwise not acurately reflected by the output.
s Suppresses display of histogram; displays summary statistics only.

Example

istat entity (s

file = entity modulo= 11 16:08:40 12 Oct 1993
frames bytes items
11
Hash-Test/Istat Statistics

total item count = 8 byte count = 2226
avg. bytes/item = 270.2 avg. items/group = 3
std. deviation = 1.0 avg. bytes/group = 202.3
suggested modulo = 3.0

See Also

Command Name Type Description
file.reference Definition How to reference files in Pick.
access.verbs Definition General form of Access sentences.
tcl.item Verb: Access Displays group to which item hashes.
access.hash-test Verb: Access Performs distribution analysis on file with test modulo.
access.options Definition Standard options: b,c,d,h,i,j,k,n,p,r,s,u,y
modulo Attribute Defining Item References attribute 3 of the current item.
tcl.f-resize Verb: Access Calculates a new recommended modulo for the requested files.
tcl.resize Verb: Access resizes a file to the desired modulo.
tcl.nframe-index Verb: Access Displays total number of frames used by index or indices.
filename.file-of-files Definition Statistical information on all files.
pointer.item Definition Pointer item overview

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