Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/11452

Log:
commit 23e65e7db422b457a62c6791650b0d9347c8a8aa
Author: You Yamagata <bi.yamagata at gmail.com>
Date:   Mon Dec 3 11:18:57 2012 +0900

    Add suffix hash recalculation to object-auditor.
    
    rebase and add minor fix.
    ---
    To fix #971914, this patch add suffix_hash_recalc_enable option.
    If enable it, all suffix hashes value are recalculated and
    hashes.pkl files are rebuilt at 'ALL' auditor_type mode.
    
    To estimate the impact to performance, I measured the processing
    time in SAIO enviroment with 'daemonize = False',
    'files_per_second=1000', 'bytes_per_second=1000000000',
    64KB/2265 objects.
    
    If there is no change in hashes.pkl (best case),
    no update to hashes.pkl happens.
    So the impact to processing time is very slight.
    
    If removed all hashes.pkl files (worst case), all hashes.pkl are
    updated. So it was 8 times slower.
    
    [no change in all partitons (hashes.pkl are not updated)]
    false:  6.2sec
    true :  6.4sec
    
    [remove all hashes.pkl (hashes.pkl are updated)]
    false:  6.3sec
    true : 46.5sec
    
    DocImpact
    
    Change-Id: Id8aff3cc7553c704db837dab636fc19ef3e1db54