Re: Primary chunk - a misnomer
Posted in 1995
In article <wdgDJHtyw.IAH@netcom.com> wdg@netcom.com (Billski) writes:
>I was reading in the "Informix Systems Journal" dated July/August 1995.
>In particular, I was reading the excerpt from Joe Lumbley's book in
>this issue. He makes the following claim:
>
>The chunks are known as primary chunk for the first chunk
>in a dbspace and secondary chunk for any additional chunks added.
>(This is not an exact quote, to avoid possible copyright infringements.)
>
>Bunk. Bull. Incorrect.
>
>Do a tbstat -d. Notice the flags. Do you ever see a flag of "SO-"?
>No, you will see either "PO-" or "MO-". The "P" means "PRIMARY", and
>the "M" means "MIRROR". Any chunk, I mean ANY CHUNK that is not a mirror
>chunk is a primary chunk, regardless of order of creation. Informix has
>no such concept as a secondary chunk.
Try dropping chunks in a multi-chunk dbspace. You'll get the error:
Chunk not dropped.
ISAM error: Can not drop first chunk
when you try to remove the first chunk.
Keith Fang
Consultant/DBA