* [9fans] Venti arenas question.
@ 2003-03-27 2:54 Dan Cross
2003-03-27 2:58 ` Russ Cox
2003-03-27 2:58 ` William Josephson
0 siblings, 2 replies; 3+ messages in thread
From: Dan Cross @ 2003-03-27 2:54 UTC (permalink / raw)
To: 9fans
The Setting up a Venti document on the Wiki mentions concatenating lots
of smaller arenas into a single large log space. Okay, if I have a big
disk (say, a couple of mirrored 150GB IDE drives), why would I want to
split my log space up into small arenas? Would it be easier to just
create a single, really big arena and not worry about smaller ones?
I'm sure there's a logical answer, but I'm not aware of what it is.
Also, are there plans to add a read cache to Fossil anytime soon?
- Dan C.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] Venti arenas question.
2003-03-27 2:54 [9fans] Venti arenas question Dan Cross
@ 2003-03-27 2:58 ` Russ Cox
2003-03-27 2:58 ` William Josephson
1 sibling, 0 replies; 3+ messages in thread
From: Russ Cox @ 2003-03-27 2:58 UTC (permalink / raw)
To: 9fans
There's a difference between arenas and
arena partitions. There's no reason not to
use a single big arena partition:
--rw-r----- S 0 rsc rsc 16727702528 Mar 25 21:54 /dev/sdC0/v.arenas
Internally, Venti will chop it into smallish
arenas in units suitable for backup to tape
or CD-ROM. The default is 500MB. If you
are planning to back up to CD-ROM you might
want to use 650MB or so.
Read the Venti paper for more. /sys/doc/venti/venti.ps
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] Venti arenas question.
2003-03-27 2:54 [9fans] Venti arenas question Dan Cross
2003-03-27 2:58 ` Russ Cox
@ 2003-03-27 2:58 ` William Josephson
1 sibling, 0 replies; 3+ messages in thread
From: William Josephson @ 2003-03-27 2:58 UTC (permalink / raw)
To: 9fans
On Wed, Mar 26, 2003 at 09:54:52PM -0500, Dan Cross wrote:
> The Setting up a Venti document on the Wiki mentions concatenating lots
> of smaller arenas into a single large log space. Okay, if I have a big
> disk (say, a couple of mirrored 150GB IDE drives), why would I want to
> split my log space up into small arenas? Would it be easier to just
> create a single, really big arena and not worry about smaller ones?
> I'm sure there's a logical answer, but I'm not aware of what it is.
Well for one, so you can copy small pieces off onto DVDs.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2003-03-27 2:54 [9fans] Venti arenas question Dan Cross
2003-03-27 2:58 ` Russ Cox
2003-03-27 2:58 ` William Josephson
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