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From: terry@cs.weber.edu (A Wizard of Earth C)
Subject: Re: Largest file size for 386BSD ?
Message-ID: <1992Nov6.173454.17896@fcom.cc.utah.edu>
Sender: news@fcom.cc.utah.edu
Organization: Weber State University (Ogden, UT)
References: <1992Nov6.031757.20766@ntuix.ntu.ac.sg>
Date: Fri, 6 Nov 92 17:34:54 GMT
Lines: 38
In article <1992Nov6.031757.20766@ntuix.ntu.ac.sg> eoahmad@ntuix.ntu.ac.sg (Othman Ahmad) writes:
>
>Original Unix has the largest file size of 4Gbyte, because it uses 24-bit
>pointer.(shouldn't it be 16Gbyte?)
No, 4 Gig; think of identification of indirect blocks for a total of two
levels of indirection using a 24 bit value.
>What is the size for 386bsd?
>If it still uses 24-bit pointers, then the largest size is still 4Gbyte.
Yep.
>This will be an important issue because soon we'll have hundreds of gigabytes,
>instead of magabytes soon.
> It took the jump from tens mega to hundreds in just 10 years.
Get around the problem:
1) Multiple partitions not exceeding the 4 Gig limit.
2) Larger terminal blocks.
3) Additional indirection levels.
4) Assumption of larger files = log-structure file systems (ala Sprite).
I don't think it will be an issue that soon anyway.
Terry Lambert
terry@icarus.weber.edu
terry_lambert@novell.com
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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