Re: Cache Hash Index meta page.

On Sep 2, 2016 7:38 PM, "Jesper Pedersen" <jesper(dot)pedersen(at)redhat(dot)com>
wrote:
> Could you provide a rebased patch based on Amit's v5 ?

Please find the the patch, based on Amit's V5.

I have fixed following things

1. now in "_hash_first" we check if (opaque->hasho_prevblkno ==
InvalidBlockNumber) to see if bucket is from older version hashindex and
has been upgraded. Since as of now InvalidBlockNumber is one value greater
than maximum value the variable "metap->hashm_maxbucket" can be set (see
_hash_expandtable). We can distinguish it from rest. I tested the upgrade
issue reported by amit. It is fixed now.

2. One case which buckets hasho_prevblkno is used is where we do backward
scan. So now before testing for previous block number I test whether
current page is bucket page if so we end the bucket scan (see changes in
_hash_readprev). On other places where hasho_prevblkno is used it is not
for bucket page, so I have not put any extra check to verify if is a bucket
page.