* [9fans] man venti problems
@ 2007-10-12 2:34 erik quanstrom
2007-10-12 2:40 ` Rob Pike
0 siblings, 1 reply; 3+ messages in thread
From: erik quanstrom @ 2007-10-12 2:34 UTC (permalink / raw)
To: 9fans
this particular section of the venti man page
formats particularly poorly unless man is given the
-P option.
(maximum 512MB, 2\s-2\u32\d\s+2 bits).
.PP
The bloom filter should be sized so that
.I nhash
\(mu
.I nblock
\(<=
0.7 \(mu
.IR b ,
where
.I nblock
is the expected number of blocks stored on the server
and
.I b
is the bitmap size in bits.
The false positive rate of the bloom filter when sized
this way is approximately 2\s-2\u\-\fInblock\fR\d\s+2.
.I Nhash
- erik
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] man venti problems
2007-10-12 2:34 [9fans] man venti problems erik quanstrom
@ 2007-10-12 2:40 ` Rob Pike
2007-10-12 4:09 ` erik quanstrom
0 siblings, 1 reply; 3+ messages in thread
From: Rob Pike @ 2007-10-12 2:40 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
Or run through col(1).
-rob
On 10/11/07, erik quanstrom <quanstro@quanstro.net> wrote:
> this particular section of the venti man page
> formats particularly poorly unless man is given the
> -P option.
>
> (maximum 512MB, 2\s-2\u32\d\s+2 bits).
> .PP
> The bloom filter should be sized so that
> .I nhash
> \(mu
> .I nblock
> \(<=
> 0.7 \(mu
> .IR b ,
> where
> .I nblock
> is the expected number of blocks stored on the server
> and
> .I b
> is the bitmap size in bits.
> The false positive rate of the bloom filter when sized
> this way is approximately 2\s-2\u\-\fInblock\fR\d\s+2.
> .I Nhash
>
> - erik
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2007-10-12 2:34 [9fans] man venti problems erik quanstrom
2007-10-12 2:40 ` Rob Pike
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