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Re: Performance of MDB and BDB Please suggest?
Chirs and Howard,
Please share the slapd.conf for MDB for which you have done the performance testing..
On Fri, Aug 24, 2012 at 11:46 PM, Howard Chu <email@example.com>
Not at this point. There are several approaches to test; most of them will
Chris Card wrote:
>>>>> I am using openldap 2.4.32 on centos 6, on a 24 core box with 132 Gb RAM.
>>>>> My test directory has ~ 3 million entries, and I loaded it into mdb using
>>>> slapadd which took over 2 days (by comparison, the same load into bdb takes
>>>> 2-3 hours).
>>>> This is not normal. With slapadd -q MDB is faster than BDB assuming you're
>>>> using a decent filesystem and sensible mount options. JFS, EXT2, do better
>>>> than other filesystems in my tests. Very recent EXT4 may be better than EXT3
>>>> as well.
>>> The filesystem is xfs, mounted as a drbd device (although at the moment the other
>>> half of the drbd pair is not configured, so it doesn't have to wait for synchronous
>>> writes across the network)
>> Sounds like you're not using slapadd -q. Either that, or your filesystem cache
> Oh ****! You're quite right, I managed to lose the -q from the slapadd command when copy/pasting
> from a script. I'll try running it again with -q.
> Do you have an ETA for improvements to mdb write performance?
probably be dead ends.