CNFS block size?

Tony Mills tony.mills at
Sat Mar 19 10:33:56 UTC 2005

this would explain the issue as during the migration we increased the binary 
storage from 400GB to 1.5TB which means more data to map.

I will try this and let you know


----- Original Message ----- 
From: "Forrest J. Cavalier III" <mibsoft at>
To: <inn-workers at>
Sent: Friday, March 18, 2005 1:36 PM
Subject: Re: CNFS block size?

Tony Mills wrote:
> Hi All,
> To increase the CNFS blocksize (reducing the size the vector bitmap) is it 
> just a case of increasing the CNFS_BLOCKSIZE variable in cnfs-private.h to 
> a different value?

Yes, that is what I meant.  You will have to start the spool, history, and 
overview from scratch
because those files keep track of CNFS block indexes, not file offsets.

The amount of memory used by bitvectors is a function of the total
spool size.  For example, 25 cycbuffs of 2gb each will require the same
as 1 cycbuff of 50gb.

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