Re: LMDB use of sparse or non-sparse data file

[Geoff Swan <gswan3@bigpond.net.au>]

On 26/03/2015 6:23 AM, Quanah Gibson-Mount wrote:
> --On Wednesday, March 25, 2015 8:41 AM +1100 Geoff Swan
> <gswan3@bigpond.net.au> wrote:
>
>>
>>> Well, to be clear: While the DB is sparse, mdb_copy does drop the
>>> unused map space when using mdb_copy by default.
>> That is what I have seen.
>> The filesystem reports 2TB file size for the first server, and 590GB
>> file size for the mdb copy, with default options.
>
> Use du -c to get actual used space instead of the maxsize value.
>
>>> I think this is the behavior they're referring to.  However, in my
>>> experience, after starting up slapd with an mdb_copy'd db, where
>>> sparse files are in use, the size will be set to whatever slapd's
>>> configured to use after slapd is started.
>> This is not what is being seen.
>> The file size remains at 590GB on the server using the copy, and 2TB on
>> the original server.
>
> Then there's something odd happening on your server where you placed
> the copy.  What OpenLDAP version are you using?
It is 2.4.39.
I might try a slapcat/slapadd to rebuild the db file and see if that
corrects the problem.

>
> --Quanah
>
>
> -- 
>
> Quanah Gibson-Mount
> Platform Architect
> Zimbra, Inc.
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