index header capture

[Kenneth Brody]

On 3/9/2010 11:41 AM, John Sica wrote:
> Doing backups over the internet has forced me to consider eliminating
> the indexes from the backup.
>
> Some time ago, I was able to capture only the part of the index I needed
> to re-create the index.  I used a command similar to this.
>
> dd if=index.A of=index.head bs=1 count=160
>
> This command captures the first 160 bytes of the file (index) and
> outputs it to another file called index.head.
>
> However, when this file (index.head) is renamed to index.A, it does not
> give me all the information I need to create the index.  Does anyone
> know the minimum number of bytes needed to create an index.

Stick with 2K.  And use "bs=2k count=1" for efficiency.  (ie: do 1 read of 
2K rather than 2,048 reads of 1 byte each.)

-- 
Kenneth Brody